v2.32.5

Bump actions/checkout from 4.2.0 to 5.0.0

.coveragerc

@@ -1,2 +1,2 @@
 [run]
-omit = requests/packages/*
+omit = requests/packages/*

.git-blame-ignore-revs

@@ -0,0 +1,5 @@
+# You can configure git to automatically use this file with the following config:
+# git config --global blame.ignoreRevsFile .git-blame-ignore-revs
+
+# Add automatic code formatting to Requests
+2a6f290bc09324406708a4d404a88a45d848ddf9

.github/ISSUE_TEMPLATE.md

@@ -25,4 +25,4 @@ import requests
 
 This command is only available on Requests v2.16.4 and greater. Otherwise,
 please provide some basic information about your system (Python version,
-operating system, &c).
+operating system, &c).

.github/ISSUE_TEMPLATE/Custom.md

@@ -1,6 +1,9 @@
 ---
 name: Request for Help
 about: Guidance on using Requests.
+labels:
+- "Question/Not a bug"
+- "actions/autoclose-qa"
 
 ---
 

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -1,6 +1,9 @@
 ---
 name: Feature request
 about: Suggest an idea for this project
+labels:
+- "Feature Request"
+- "actions/autoclose-feat"
 
 ---
 

.github/SECURITY.md

@@ -1,18 +1,9 @@
 # Vulnerability Disclosure
 
 If you think you have found a potential security vulnerability in
-requests, please email [Nate](mailto:nate.prewitt@gmail.com)
-and [Seth](mailto:sethmichaellarson@gmail.com) directly.
-**Do not file a public issue.**
-
-Our PGP Key fingerprints are:
-
-- 8722 7E29 AD9C FF5C FAC3  EA6A 44D3 FF97 B80D C864 ([@nateprewitt](https://keybase.io/nateprewitt))
-
-- EDD5 6765 A9D8 4653 CBC8  A134 51B0 6736 1740 F5FC ([@sethmlarson](https://keybase.io/sethmlarson))
-
-You can also contact us on [Keybase](https://keybase.io) with the
-profiles above if desired.
+requests, please open a [draft Security Advisory](https://github.com/psf/requests/security/advisories/new)
+via GitHub. We will coordinate verification and next steps through
+that secure medium.
 
 If English is not your first language, please try to describe the
 problem and its impact to the best of your ability. For greater detail,
@@ -72,7 +63,7 @@ intended patch ahead of time, to ensure that they are able to promptly
 release their downstream packages. Currently the list of people we
 actively contact *ahead of a public release* is:
 
--   Jeremy Cline, Red Hat (@jeremycline)
+-   Python Maintenance Team, Red Hat (python-maint@redhat.com)
 -   Daniele Tricoli, Debian (@eriol)
 
 We will notify these individuals at least a week ahead of our planned

.github/dependabot.yml

@@ -0,0 +1,11 @@
+version: 2
+updates:
+  - package-ecosystem: github-actions
+    directory: /
+    schedule:
+      interval: weekly
+    ignore:
+      # Ignore all patch releases as we can manually
+      # upgrade if we run into a bug and need a fix.
+      - dependency-name: "*"
+        update-types: ["version-update:semver-patch"]

.github/workflows/close-issues.yml

@@ -0,0 +1,35 @@
+name: 'Autoclose Issues'
+
+on:
+  issues:
+    types:
+      - labeled
+
+permissions:
+  issues: write
+
+jobs:
+  close_qa:
+    if: github.event.label.name == 'actions/autoclose-qa'
+    runs-on: ubuntu-latest
+    steps:
+      - env:
+          ISSUE_URL: ${{ github.event.issue.html_url }}
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh issue close $ISSUE_URL \
+            --comment "As described in the template, we won't be able to answer questions on this issue tracker. Please use [Stack Overflow](https://stackoverflow.com/)" \
+            --reason completed
+          gh issue lock $ISSUE_URL --reason off_topic
+  close_feature_request:
+    if: github.event.label.name == 'actions/autoclose-feat'
+    runs-on: ubuntu-latest
+    steps:
+      - env:
+          ISSUE_URL: ${{ github.event.issue.html_url }}
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          gh issue close $ISSUE_URL \
+            --comment "As described in the template, Requests is not accepting feature requests" \
+            --reason "not planned"
+          gh issue lock $ISSUE_URL --reason off_topic

.github/workflows/codeql-analysis.yml

@@ -14,8 +14,15 @@ on:
   schedule:
     - cron: '0 23 * * 0'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
+    permissions:
+      actions: read  # for github/codeql-action/init to get workflow details
+      contents: read  # for actions/checkout to fetch code
+      security-events: write  # for github/codeql-action/autobuild to send a status report
     name: Analyze
     runs-on: ubuntu-latest
 
@@ -25,7 +32,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v2
+      uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       with:
         # We must fetch at least the immediate parents so that if this is
         # a pull request then we can checkout the head.
@@ -38,18 +45,18 @@ jobs:
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v1
+      uses: github/codeql-action/init@ce28f5bb42b7a9f2c824e633a3f6ee835bab6858 # v3.29.0
       with:
         languages: "python"
         # If you wish to specify custom queries, you can do so here or in a config file.
-        # By default, queries listed here will override any specified in a config file. 
+        # By default, queries listed here will override any specified in a config file.
         # Prefix the list here with "+" to use these queries and those in the config file.
         # queries: ./path/to/local/query, your-org/your-repo/queries@main
 
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v1
+      uses: github/codeql-action/autobuild@ce28f5bb42b7a9f2c824e633a3f6ee835bab6858 # v3.29.0
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -63,4 +70,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v1
+      uses: github/codeql-action/analyze@ce28f5bb42b7a9f2c824e633a3f6ee835bab6858 # v3.29.0

.github/workflows/lint.yml

@@ -0,0 +1,20 @@
+name: Lint code
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+jobs:
+  lint:
+    runs-on: ubuntu-24.04
+    timeout-minutes: 10
+
+    steps:
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+    - name: Set up Python
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
+      with:
+        python-version: "3.x"
+    - name: Run pre-commit
+      uses: pre-commit/action@646c83fcd040023954eafda54b4db0192ce70507 # v3.0.0

.github/workflows/lock-issues.yml

@@ -2,7 +2,7 @@ name: 'Lock Threads'
 
 on:
   schedule:
-    - cron: '0 * * * *'
+    - cron: '0 0 * * *'
 
 permissions:
   issues: write
@@ -10,9 +10,10 @@ permissions:
 
 jobs:
   action:
+    if: github.repository_owner == 'psf'
     runs-on: ubuntu-latest
     steps:
-      - uses: dessant/lock-threads@v2
+      - uses: dessant/lock-threads@d42e5f49803f3c4e14ffee0378e31481265dda22 # v5.0.0
         with:
             issue-lock-inactive-days: 90
             pr-lock-inactive-days: 90

.github/workflows/publish.yml

@@ -0,0 +1,93 @@
+name: Publish to PyPI
+
+on:
+  push:
+    tags:
+      - "v*"
+
+permissions:
+  contents: read
+
+jobs:
+  build:
+    name: "Build dists"
+    runs-on: "ubuntu-latest"
+    environment:
+      name: "publish"
+    outputs:
+      hashes: ${{ steps.hash.outputs.hashes }}
+      artifact-id: ${{ steps.upload-artifact.outputs.artifact-id }}
+
+    steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+        with:
+          egress-policy: audit
+
+      - name: "Checkout repository"
+        uses: "actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8"
+        with:
+          persist-credentials: false
+
+      - name: "Setup Python"
+        uses: "actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065"
+        with:
+          python-version: "3.x"
+
+      - name: "Install dependencies"
+        run: python -m pip install build==0.8.0
+
+      - name: "Build dists"
+        run: |
+          SOURCE_DATE_EPOCH=$(git log -1 --pretty=%ct) \
+          python -m build
+
+      - name: "Generate hashes"
+        id: hash
+        run: |
+          cd dist && echo "::set-output name=hashes::$(sha256sum * | base64 -w0)"
+
+      - name: "Upload dists"
+        uses: "actions/upload-artifact@ea165f8d65b6e75b540449e92b4886f43607fa02"
+        id: upload-artifact
+        with:
+          name: "dist"
+          path: "dist/"
+          if-no-files-found: error
+          retention-days: 5
+
+  provenance:
+    needs: [build]
+    permissions:
+      actions: read
+      contents: write
+      id-token: write # Needed to access the workflow's OIDC identity.
+    uses: "slsa-framework/slsa-github-generator/.github/workflows/generator_generic_slsa3.yml@v2.1.0"
+    with:
+      base64-subjects: "${{ needs.build.outputs.hashes }}"
+      upload-assets: true
+      compile-generator: true # Workaround for https://github.com/slsa-framework/slsa-github-generator/issues/1163
+
+  publish:
+    name: "Publish"
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: ["build", "provenance"]
+    permissions:
+      contents: write
+      id-token: write
+    runs-on: "ubuntu-latest"
+
+    steps:
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@ec9f2d5744a09debf3a187a3f4f675c53b671911 # v2.13.0
+      with:
+        egress-policy: audit
+
+    - name: "Download dists"
+      uses: "actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0" # v5.0.0
+      with:
+        artifact-ids: ${{ needs.build.outputs.artifact-id }}
+        path: "dist/"
+
+    - name: "Publish dists to PyPI"
+      uses: "pypa/gh-action-pypi-publish@76f52bc884231f62b9a034ebfe128415bbaabdfc"

.github/workflows/run-tests.yml

@@ -2,6 +2,9 @@ name: Tests
 
 on: [push, pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}
@@ -9,25 +12,64 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10"]
-        os: [ubuntu-18.04, macOS-latest, windows-latest]
-        include:
-          # pypy3 on Mac OS currently fails trying to compile
-          # brotlipy. Moving pypy3 to only test linux.
-          - python-version: pypy3
-            os: ubuntu-latest
-          - python-version: pypy-3.7
-            os: ubuntu-latest
+        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14-dev", "pypy-3.10", "pypy-3.11"]
+        os: [ubuntu-22.04, macOS-latest, windows-latest]
+        # Pypy-3.11 can't install openssl-sys with rust
+        # which prevents us from testing in GHA.
+        exclude:
+        - { python-version: "pypy-3.11", os: "windows-latest" }
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
     - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v2
+      uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
       with:
         python-version: ${{ matrix.python-version }}
+        cache: 'pip'
+        allow-prereleases: true
     - name: Install dependencies
       run: |
         make
     - name: Run tests
       run: |
         make ci
+
+  no_chardet:
+    name: "No Character Detection"
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: true
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - name: 'Set up Python 3.9'
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
+        with:
+          python-version: '3.9'
+      - name: Install dependencies
+        run: |
+          make
+          python -m pip uninstall -y "charset_normalizer" "chardet"
+      - name: Run tests
+        run: |
+          make ci
+
+  urllib3:
+    name: 'urllib3 1.x'
+    runs-on: 'ubuntu-latest'
+    strategy:
+      fail-fast: true
+
+    steps:
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
+      - name: 'Set up Python 3.9'
+        uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065
+        with:
+          python-version: '3.9'
+      - name: Install dependencies
+        run: |
+          make
+          python  -m pip install "urllib3<2"
+      - name: Run tests
+        run: |
+          make ci

.pre-commit-config.yaml

@@ -0,0 +1,28 @@
+exclude: 'docs/|ext/'
+
+repos:
+- repo: https://github.com/pre-commit/pre-commit-hooks
+  rev: v4.4.0
+  hooks:
+  - id: check-yaml
+  - id: debug-statements
+  - id: end-of-file-fixer
+  - id: trailing-whitespace
+- repo: https://github.com/PyCQA/isort
+  rev: 5.12.0
+  hooks:
+    - id: isort
+- repo: https://github.com/psf/black
+  rev: 23.7.0
+  hooks:
+    - id: black
+      exclude: tests/test_lowlevel.py
+- repo: https://github.com/asottile/pyupgrade
+  rev: v3.10.1
+  hooks:
+    - id: pyupgrade
+      args: [--py37-plus]
+- repo: https://github.com/PyCQA/flake8
+  rev: 6.1.0
+  hooks:
+    - id: flake8

.readthedocs.yaml

@@ -0,0 +1,29 @@
+# Read the Docs configuration file for Sphinx projects
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the OS, Python version and other tools you might need
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3.12"
+
+# Build documentation in the "docs/" directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+  builder: "dirhtml"
+
+# Optionally build your docs in additional formats such as PDF and ePub
+formats:
+  - pdf
+  - epub
+
+# Optional but recommended, declare the Python requirements required
+# to build your documentation
+# See https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+python:
+  install:
+    - path: .
+    - requirements: docs/requirements.txt

AUTHORS.rst

@@ -8,7 +8,7 @@ Keepers of the Crystals
 
 Previous Keepers of Crystals
 ````````````````````````````
-- Kenneth Reitz <me@kennethreitz.org> `@ken-reitz <https://github.com/ken-reitz>`_, reluctant Keeper of the Master Crystal.
+- Kenneth Reitz <me@kennethreitz.org> `@kennethreitz <https://github.com/kennethreitz>`_, reluctant Keeper of the Master Crystal.
 - Cory Benfield <cory@lukasa.co.uk> `@lukasa <https://github.com/lukasa>`_
 - Ian Cordasco <graffatcolmingov@gmail.com> `@sigmavirus24 <https://github.com/sigmavirus24>`_.
 
@@ -192,3 +192,4 @@ Patches and Suggestions
 - Alessio Izzo (`@aless10 <https://github.com/aless10>`_)
 - Sylvain Marié (`@smarie <https://github.com/smarie>`_)
 - Hod Bin Noon (`@hodbn <https://github.com/hodbn>`_)
+- Mike Fiedler (`@miketheman <https://github.com/miketheman>`_)

HISTORY.md

@@ -6,6 +6,211 @@ dev
 
 - \[Short description of non-trivial change.\]
 
+2.32.5 (2025-08-18)
+-------------------
+
+**Bugfixes**
+
+- The SSLContext caching feature originally introduced in 2.32.0 has created
+  a new class of issues in Requests that have had negative impact across a number
+  of use cases. The Requests team has decided to revert this feature as long term
+  maintenance of it is proving to be unsustainable in its current iteration.
+
+**Deprecations**
+- Added support for Python 3.14.
+- Dropped support for Python 3.8 following its end of support.
+
+2.32.4 (2025-06-10)
+-------------------
+
+**Security**
+- CVE-2024-47081 Fixed an issue where a maliciously crafted URL and trusted
+  environment will retrieve credentials for the wrong hostname/machine from a
+  netrc file.
+
+**Improvements**
+- Numerous documentation improvements
+
+**Deprecations**
+- Added support for pypy 3.11 for Linux and macOS.
+- Dropped support for pypy 3.9 following its end of support.
+
+
+2.32.3 (2024-05-29)
+-------------------
+
+**Bugfixes**
+- Fixed bug breaking the ability to specify custom SSLContexts in sub-classes of
+  HTTPAdapter. (#6716)
+- Fixed issue where Requests started failing to run on Python versions compiled
+  without the `ssl` module. (#6724)
+
+2.32.2 (2024-05-21)
+-------------------
+
+**Deprecations**
+- To provide a more stable migration for custom HTTPAdapters impacted
+  by the CVE changes in 2.32.0, we've renamed `_get_connection` to
+  a new public API, `get_connection_with_tls_context`. Existing custom
+  HTTPAdapters will need to migrate their code to use this new API.
+  `get_connection` is considered deprecated in all versions of Requests>=2.32.0.
+
+  A minimal (2-line) example has been provided in the linked PR to ease
+  migration, but we strongly urge users to evaluate if their custom adapter
+  is subject to the same issue described in CVE-2024-35195. (#6710)
+
+2.32.1 (2024-05-20)
+-------------------
+
+**Bugfixes**
+- Add missing test certs to the sdist distributed on PyPI.
+
+
+2.32.0 (2024-05-20)
+-------------------
+
+**Security**
+- Fixed an issue where setting `verify=False` on the first request from a
+  Session will cause subsequent requests to the _same origin_ to also ignore
+  cert verification, regardless of the value of `verify`.
+  (https://github.com/psf/requests/security/advisories/GHSA-9wx4-h78v-vm56)
+
+**Improvements**
+- `verify=True` now reuses a global SSLContext which should improve
+  request time variance between first and subsequent requests. It should
+  also minimize certificate load time on Windows systems when using a Python
+  version built with OpenSSL 3.x. (#6667)
+- Requests now supports optional use of character detection
+  (`chardet` or `charset_normalizer`) when repackaged or vendored.
+  This enables `pip` and other projects to minimize their vendoring
+  surface area. The `Response.text()` and `apparent_encoding` APIs
+  will default to `utf-8` if neither library is present. (#6702)
+
+**Bugfixes**
+- Fixed bug in length detection where emoji length was incorrectly
+  calculated in the request content-length. (#6589)
+- Fixed deserialization bug in JSONDecodeError. (#6629)
+- Fixed bug where an extra leading `/` (path separator) could lead
+  urllib3 to unnecessarily reparse the request URI. (#6644)
+
+**Deprecations**
+
+- Requests has officially added support for CPython 3.12 (#6503)
+- Requests has officially added support for PyPy 3.9 and 3.10 (#6641)
+- Requests has officially dropped support for CPython 3.7 (#6642)
+- Requests has officially dropped support for PyPy 3.7 and 3.8 (#6641)
+
+**Documentation**
+- Various typo fixes and doc improvements.
+
+**Packaging**
+- Requests has started adopting some modern packaging practices.
+  The source files for the projects (formerly `requests`) is now located
+  in `src/requests` in the Requests sdist. (#6506)
+- Starting in Requests 2.33.0, Requests will migrate to a PEP 517 build system
+  using `hatchling`. This should not impact the average user, but extremely old
+  versions of packaging utilities may have issues with the new packaging format.
+
+
+2.31.0 (2023-05-22)
+-------------------
+
+**Security**
+- Versions of Requests between v2.3.0 and v2.30.0 are vulnerable to potential
+  forwarding of `Proxy-Authorization` headers to destination servers when
+  following HTTPS redirects.
+
+  When proxies are defined with user info (`https://user:pass@proxy:8080`), Requests
+  will construct a `Proxy-Authorization` header that is attached to the request to
+  authenticate with the proxy.
+
+  In cases where Requests receives a redirect response, it previously reattached
+  the `Proxy-Authorization` header incorrectly, resulting in the value being
+  sent through the tunneled connection to the destination server. Users who rely on
+  defining their proxy credentials in the URL are *strongly* encouraged to upgrade
+  to Requests 2.31.0+ to prevent unintentional leakage and rotate their proxy
+  credentials once the change has been fully deployed.
+
+  Users who do not use a proxy or do not supply their proxy credentials through
+  the user information portion of their proxy URL are not subject to this
+  vulnerability.
+
+  Full details can be read in our [Github Security Advisory](https://github.com/psf/requests/security/advisories/GHSA-j8r2-6x86-q33q)
+  and [CVE-2023-32681](https://nvd.nist.gov/vuln/detail/CVE-2023-32681).
+
+
+2.30.0 (2023-05-03)
+-------------------
+
+**Dependencies**
+- ⚠️ Added support for urllib3 2.0. ⚠️
+
+  This may contain minor breaking changes so we advise careful testing and
+  reviewing https://urllib3.readthedocs.io/en/latest/v2-migration-guide.html
+  prior to upgrading.
+
+  Users who wish to stay on urllib3 1.x can pin to `urllib3<2`.
+
+2.29.0 (2023-04-26)
+-------------------
+
+**Improvements**
+
+- Requests now defers chunked requests to the urllib3 implementation to improve
+  standardization. (#6226)
+- Requests relaxes header component requirements to support bytes/str subclasses. (#6356)
+
+2.28.2 (2023-01-12)
+-------------------
+
+**Dependencies**
+
+- Requests now supports charset\_normalizer 3.x. (#6261)
+
+**Bugfixes**
+
+- Updated MissingSchema exception to suggest https scheme rather than http. (#6188)
+
+2.28.1 (2022-06-29)
+-------------------
+
+**Improvements**
+
+- Speed optimization in `iter_content` with transition to `yield from`. (#6170)
+
+**Dependencies**
+
+- Added support for chardet 5.0.0 (#6179)
+- Added support for charset-normalizer 2.1.0 (#6169)
+
+2.28.0 (2022-06-09)
+-------------------
+
+**Deprecations**
+
+- ⚠️ Requests has officially dropped support for Python 2.7. ⚠️ (#6091)
+- Requests has officially dropped support for Python 3.6 (including pypy3.6). (#6091)
+
+**Improvements**
+
+- Wrap JSON parsing issues in Request's JSONDecodeError for payloads without
+  an encoding to make `json()` API consistent. (#6097)
+- Parse header components consistently, raising an InvalidHeader error in
+  all invalid cases. (#6154)
+- Added provisional 3.11 support with current beta build. (#6155)
+- Requests got a makeover and we decided to paint it black. (#6095)
+
+**Bugfixes**
+
+- Fixed bug where setting `CURL_CA_BUNDLE` to an empty string would disable
+  cert verification. All Requests 2.x versions before 2.28.0 are affected. (#6074)
+- Fixed urllib3 exception leak, wrapping `urllib3.exceptions.SSLError` with
+  `requests.exceptions.SSLError` for `content` and `iter_content`. (#6057)
+- Fixed issue where invalid Windows registry entries caused proxy resolution
+  to raise an exception rather than ignoring the entry. (#6149)
+- Fixed issue where entire payload could be included in the error message for
+  JSONDecodeError. (#6036)
+
 2.27.1 (2022-01-05)
 -------------------
 

MANIFEST.in

@@ -1,2 +1,3 @@
-include README.md LICENSE NOTICE HISTORY.md pytest.ini requirements-dev.txt
+include README.md LICENSE NOTICE HISTORY.md requirements-dev.txt
 recursive-include tests *.py
+recursive-include tests/certs *

Makefile

@@ -1,26 +1,25 @@
 .PHONY: docs
 init:
-	pip install -e .[socks]
-	pip install -r requirements-dev.txt
+	python -m pip install -r requirements-dev.txt
 test:
-	# This runs all of the tests, on both Python 2 and Python 3.
-	tox -p
+	python -m pytest tests
+
 ci:
-	pytest tests --junitxml=report.xml
+	python -m pytest tests --junitxml=report.xml
 
 test-readme:
 	python setup.py check --restructuredtext --strict && ([ $$? -eq 0 ] && echo "README.rst and HISTORY.rst ok") || echo "Invalid markup in README.rst or HISTORY.rst!"
 
-flake8:
-	flake8 --ignore=E501,F401,E128,E402,E731,F821 requests
-
 coverage:
-	pytest --cov-config .coveragerc --verbose --cov-report term --cov-report xml --cov=requests tests
+	python -m pytest --cov-config .coveragerc --verbose --cov-report term --cov-report xml --cov=src/requests tests
 
-publish:
-	pip install 'twine>=1.5.0'
-	python setup.py sdist bdist_wheel
-	twine upload dist/*
+.publishenv:
+	python -m venv .publishenv
+	.publishenv/bin/pip install 'twine>=1.5.0' build
+
+publish: .publishenv
+	.publishenv/bin/python -m build
+	.publishenv/bin/python -m twine upload --skip-existing dist/*
 	rm -fr build dist .egg requests.egg-info
 
 docs:

README.md

@@ -21,7 +21,7 @@ Requests allows you to send HTTP/1.1 requests extremely easily. There’s no nee
 
 Requests is one of the most downloaded Python packages today, pulling in around `30M downloads / week`— according to GitHub, Requests is currently [depended upon](https://github.com/psf/requests/network/dependents?package_id=UGFja2FnZS01NzA4OTExNg%3D%3D) by `1,000,000+` repositories. You may certainly put your trust in this code.
 
-[![Downloads](https://pepy.tech/badge/requests/month)](https://pepy.tech/project/requests)
+[![Downloads](https://static.pepy.tech/badge/requests/month)](https://pepy.tech/project/requests)
 [![Supported Versions](https://img.shields.io/pypi/pyversions/requests.svg)](https://pypi.org/project/requests)
 [![Contributors](https://img.shields.io/github/contributors/psf/requests.svg)](https://github.com/psf/requests/graphs/contributors)
 
@@ -33,7 +33,7 @@ Requests is available on PyPI:
 $ python -m pip install requests
 ```
 
-Requests officially supports Python 2.7 & 3.6+.
+Requests officially supports Python 3.9+.
 
 ## Supported Features & Best–Practices
 
@@ -60,7 +60,7 @@ Requests is ready for the demands of building robust and reliable HTTP–speakin
 ## Cloning the repository
 
 When cloning the Requests repository, you may need to add the `-c
-fetch.fsck.badTimezone=ignore` flag to avoid an error about a bad commit (see
+fetch.fsck.badTimezone=ignore` flag to avoid an error about a bad commit timestamp (see
 [this issue](https://github.com/psf/requests/issues/2690) for more background):
 
 ```shell

docs/_templates/sidebarintro.html

@@ -8,51 +8,23 @@
   <iframe src="https://ghbtns.com/github-btn.html?user=psf&repo=requests&type=watch&count=true&size=large"
     allowtransparency="true" frameborder="0" scrolling="0" width="200px" height="35px"></iframe>
 </p>
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" />
-<style>
-  .algolia-autocomplete {
-    width: 100%;
-    height: 1.5em
-  }
-
-  .algolia-autocomplete a {
-    border-bottom: none !important;
-  }
-
-  #doc_search {
-    width: 100%;
-    height: 100%;
-  }
-</style>
-<input id="doc_search" placeholder="Search the doc" autofocus />
-<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js" onload="docsearch({
-  apiKey: 'f177061e2354c50a97bfc635e827ffab',
-  indexName: 'python-requests',
-  inputSelector: '#doc_search',
-  debug: false // Set debug to true if you want to inspect the dropdown
-})" async></script>
 
 <p>
   Requests is an elegant and simple HTTP library for Python, built for
   human beings.
 </p>
-<p>Sponsored by <strong><a href="https://www.govcert.lu">CERT Gouvernemental - GOVCERT.LU</a></strong>.</p>
-
-<script async type="text/javascript"
-  src="//cdn.carbonads.com/carbon.js?zoneid=1673&serve=CKYI5K3E&placement=pythonrequestsorg"
-  id="_carbonads_js"></script>
 
 <h3>Useful Links</h3>
 <ul>
-  <li><a href="https://requests.readthedocs.io/en/latest/user/quickstart/">Quickstart</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/user/advanced/">Advanced Usage</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/api/">API Reference</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/community/updates/#release-history">Release History</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/dev/contributing/">Contributors Guide</a></li>
+  <li><a href="{{ pathto('user/quickstart') }}">Quickstart</a></li>
+  <li><a href="{{ pathto('user/advanced') }}">Advanced Usage</a></li>
+  <li><a href="{{ pathto('api') }}">API Reference</a></li>
+  <li><a href="{{ pathto('community/updates') + '#release-history' }}">Release History</a></li>
+  <li><a href="{{ pathto('dev/contributing') }}">Contributors Guide</a></li>
 
   <p></p>
 
-  <li><a href="https://requests.readthedocs.io/en/latest/community/recommended/">Recommended Packages and Extensions</a></li>
+  <li><a href="{{ pathto('community/recommended') }}">Recommended Packages and Extensions</a></li>
 
   <p></p>
 
@@ -61,19 +33,5 @@
   <li><a href="https://github.com/psf/requests/issues">Issue Tracker</a></li>
 </ul>
 
-
-<h3>Translations</h3>
-
-<ul>
-  <li><a href="https://requests.readthedocs.io/">English</a></li>
-  <li><a href="https://fr.python-requests.org/">French</a></li>
-  <li><a href="https://de.python-requests.org/">German</a></li>
-  <li><a href="https://jp.python-requests.org/">Japanese</a></li>
-  <li><a href="https://cn.python-requests.org/">Chinese</a></li>
-  <li><a href="https://pt.python-requests.org/">Portuguese</a></li>
-  <li><a href="https://it.python-requests.org/">Italian</a></li>
-  <li><a href="https://es.python-requests.org/">Spanish</a></li>
-</ul>
-
 <div id="native-ribbon">
 </div>

docs/_templates/sidebarlogo.html

@@ -2,29 +2,6 @@
   <iframe src="https://ghbtns.com/github-btn.html?user=psf&repo=requests&type=watch&count=true&size=large"
     allowtransparency="true" frameborder="0" scrolling="0" width="200px" height="35px"></iframe>
 </p>
-<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" />
-<style>
-  .algolia-autocomplete {
-    width: 100%;
-    height: 1.5em
-  }
-
-  .algolia-autocomplete a {
-    border-bottom: none !important;
-  }
-
-  #doc_search {
-    width: 100%;
-    height: 100%;
-  }
-</style>
-<input id="doc_search" placeholder="Search the doc" autofocus />
-<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js" onload="docsearch({
-  apiKey: 'f177061e2354c50a97bfc635e827ffab',
-  indexName: 'python-requests',
-  inputSelector: '#doc_search',
-  debug: false // Set debug to true if you want to inspect the dropdown
-})" async></script>
 
 <p>
   Requests is an elegant and simple HTTP library for Python, built for
@@ -32,23 +9,17 @@
   development release.
 </p>
 
-<p>Sponsored by <strong><a href="https://www.govcert.lu">CERT Gouvernemental - GOVCERT.LU</a></strong>.</p>
-
-  <script async type="text/javascript"
-    src="//cdn.carbonads.com/carbon.js?zoneid=1673&serve=C6AILKT&placement=pythonrequestsorg"
-    id="_carbonads_js"></script>
-
 <h3>Useful Links</h3>
 <ul>
-  <li><a href="https://requests.readthedocs.io/en/latest/user/quickstart/">Quickstart</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/user/advanced/">Advanced Usage</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/api/">API Reference</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/community/updates/#release-history">Release History</a></li>
-  <li><a href="https://requests.readthedocs.io/en/latest/dev/contributing/">Contributors Guide</a></li>
+  <li><a href="{{ pathto('user/quickstart') }}">Quickstart</a></li>
+  <li><a href="{{ pathto('user/advanced') }}">Advanced Usage</a></li>
+  <li><a href="{{ pathto('api') }}">API Reference</a></li>
+  <li><a href="{{ pathto('community/updates') + '#release-history' }}">Release History</a></li>
+  <li><a href="{{ pathto('dev/contributing') }}">Contributors Guide</a></li>
 
   <p></p>
 
-  <li><a href="https://requests.readthedocs.io/en/latest/community/recommended/">Recommended Packages and Extensions</a></li>
+  <li><a href="{{ pathto('community/recommended') }}">Recommended Packages and Extensions</a></li>
 
   <p></p>
 
@@ -57,15 +28,3 @@
   <li><a href="https://github.com/psf/requests/issues">Issue Tracker</a></li>
 </ul>
 
-  <h3>Translations</h3>
-
-  <ul>
-    <li><a href="https://requests.readthedocs.io/">English</a></li>
-    <li><a href="https://fr.python-requests.org/">French</a></li>
-    <li><a href="https://de.python-requests.org/">German</a></li>
-    <li><a href="https://jp.python-requests.org/">Japanese</a></li>
-    <li><a href="https://cn.python-requests.org/">Chinese</a></li>
-    <li><a href="https://pt.python-requests.org/">Portuguese</a></li>
-    <li><a href="https://it.python-requests.org/">Italian</a></li>
-    <li><a href="https://es.python-requests.org/">Spanish</a></li>
-  </ul>

docs/api.rst

@@ -31,11 +31,11 @@ Exceptions
 .. autoexception:: requests.RequestException
 .. autoexception:: requests.ConnectionError
 .. autoexception:: requests.HTTPError
-.. autoexception:: requests.URLRequired
 .. autoexception:: requests.TooManyRedirects
 .. autoexception:: requests.ConnectTimeout
 .. autoexception:: requests.ReadTimeout
 .. autoexception:: requests.Timeout
+.. autoexception:: requests.JSONDecodeError
 
 
 Request Sessions

docs/community/faq.rst

@@ -22,7 +22,7 @@ Custom User-Agents?
 -------------------
 
 Requests allows you to easily override User-Agent strings, along with
-any other HTTP Header. See `documentation about headers <https://requests.readthedocs.io/en/latest/user/quickstart/#custom-headers>`_.
+any other HTTP Header. See :ref:`documentation about headers <custom-headers>`.
 
 
 
@@ -55,17 +55,18 @@ Chris Adams gave an excellent summary on
 Python 3 Support?
 -----------------
 
-Yes! Requests officially supports Python 2.7 & 3.6+ and PyPy.
+Yes! Requests supports all `officially supported versions of Python <https://devguide.python.org/versions/>`_
+and recent releases of PyPy.
 
 Python 2 Support?
 -----------------
 
-Yes! We understand that we have a large user base with varying needs. Through
-**at least** Requests 2.27.x, we will be providing continued support for Python
-2.7. However, this support is likely to end some time in 2022.
+No! As of Requests 2.28.0, Requests no longer supports Python 2.7. Users who
+have been unable to migrate should pin to `requests<2.28`. Full information
+can be found in `psf/requests#6023 <https://github.com/psf/requests/issues/6023>`_.
 
-It is *highly* recommended users migrate to Python 3.7+ now since Python
-2.7 is no longer receiving bug fixes or security updates as of January 1, 2020.
+It is *highly* recommended users migrate to a supported Python 3.x version now since
+Python 2.7 is no longer receiving bug fixes or security updates as of January 1, 2020.
 
 What are "hostname doesn't match" errors?
 -----------------------------------------
@@ -83,10 +84,7 @@ when servers are using `Virtual Hosting`_. When such servers are hosting
 more than one SSL site they need to be able to return the appropriate
 certificate based on the hostname the client is connecting to.
 
-Python3 and Python 2.7.9+ include native support for SNI in their SSL modules.
-For information on using SNI with Requests on Python < 2.7.9 refer to this
-`Stack Overflow answer`_.
+Python 3 already includes native support for SNI in their SSL modules.
 
 .. _`Server-Name-Indication`: https://en.wikipedia.org/wiki/Server_Name_Indication
 .. _`virtual hosting`: https://en.wikipedia.org/wiki/Virtual_hosting
-.. _`Stack Overflow answer`: https://stackoverflow.com/questions/18578439/using-requests-with-tls-doesnt-give-sni-support/18579484#18579484

docs/community/out-there.rst

@@ -1,22 +1,10 @@
 Integrations
 ============
 
-Python for iOS
---------------
-
-Requests is built into the wonderful `Python for iOS <https://itunes.apple.com/us/app/python-2.7-for-ios/id485729872?mt=Python8>`_ runtime!
-
-To give it a try, simply::
-
-    import requests
-
-
 Articles & Talks
 ================
-- `Python for the Web <https://www.gun.io/blog/python-for-the-web>`_ teaches how to use Python to interact with the web, using Requests.
 - `Daniel Greenfeld's Review of Requests <https://pydanny.blogspot.com/2011/05/python-http-requests-for-humans.html>`_
-- `My 'Python for Humans' talk <http://python-for-humans.heroku.com>`_ ( `audio <https://codeconf.s3.amazonaws.com/2011/pycodeconf/talks/PyCodeConf2011%20-%20Kenneth%20Reitz.m4a>`_ )
-- `Issac Kelly's 'Consuming Web APIs' talk <https://issackelly.github.com/Consuming-Web-APIs-with-Python-Talk/slides/slides.html>`_
+- `Issac Kelly's 'Consuming Web APIs' talk <https://issackelly.github.io/Consuming-Web-APIs-with-Python-Talk/slides/slides.html>`_
 - `Blog post about Requests via Yum <https://arunsag.wordpress.com/2011/08/17/new-package-python-requests-http-for-humans/>`_
 - `Russian blog post introducing Requests <https://habr.com/post/126262/>`_
 - `Sending JSON in Requests <http://www.coglib.com/~icordasc/blog/2014/11/sending-json-in-requests.html>`_

docs/community/vulnerabilities.rst

@@ -1,110 +1,5 @@
 Vulnerability Disclosure
 ========================
 
-If you think you have found a potential security vulnerability in requests,
-please email `Nate <mailto:nate.prewitt@gmail.com>`_ and `Seth <mailto:@sethmichaellarson@gmail.com>`_ directly. **Do not file a public issue.**
-
-Our PGP Key fingerprints are:
-
-- 8722 7E29 AD9C FF5C FAC3  EA6A 44D3 FF97 B80D C864 (`@nateprewitt <https://keybase.io/nateprewitt>`_)
-
-- EDD5 6765 A9D8 4653 CBC8  A134 51B0 6736 1740 F5FC (`@sethmlarson <https://keybase.io/sethmlarson>`_)
-
-You can also contact us on `Keybase <https://keybase.io/>`_ with the
-profiles above if desired.
-
-If English is not your first language, please try to describe the problem and
-its impact to the best of your ability. For greater detail, please use your
-native language and we will try our best to translate it using online services.
-
-Please also include the code you used to find the problem and the shortest
-amount of code necessary to reproduce it.
-
-Please do not disclose this to anyone else. We will retrieve a CVE identifier
-if necessary and give you full credit under whatever name or alias you provide.
-We will only request an identifier when we have a fix and can publish it in a
-release.
-
-We will respect your privacy and will only publicize your involvement if you
-grant us permission.
-
-Process
--------
-
-This following information discusses the process the requests project follows
-in response to vulnerability disclosures. If you are disclosing a
-vulnerability, this section of the documentation lets you know how we will
-respond to your disclosure.
-
-Timeline
-~~~~~~~~
-
-When you report an issue, one of the project members will respond to you within
-two days *at the outside*. In most cases responses will be faster, usually
-within 12 hours. This initial response will at the very least confirm receipt
-of the report.
-
-If we were able to rapidly reproduce the issue, the initial response will also
-contain confirmation of the issue. If we are not, we will often ask for more
-information about the reproduction scenario.
-
-Our goal is to have a fix for any vulnerability released within two weeks of
-the initial disclosure. This may potentially involve shipping an interim
-release that simply disables function while a more mature fix can be prepared,
-but will in the vast majority of cases mean shipping a complete release as soon
-as possible.
-
-Throughout the fix process we will keep you up to speed with how the fix is
-progressing. Once the fix is prepared, we will notify you that we believe we
-have a fix. Often we will ask you to confirm the fix resolves the problem in
-your environment, especially if we are not confident of our reproduction
-scenario.
-
-At this point, we will prepare for the release. We will obtain a CVE number
-if one is required, providing you with full credit for the discovery. We will
-also decide on a planned release date, and let you know when it is. This
-release date will *always* be on a weekday.
-
-At this point we will reach out to our major downstream packagers to notify
-them of an impending security-related patch so they can make arrangements. In
-addition, these packagers will be provided with the intended patch ahead of
-time, to ensure that they are able to promptly release their downstream
-packages. Currently the list of people we actively contact *ahead of a public
-release* is:
-
-- Python Maintenance Team, Red Hat (python-maint@redhat.com)
-- Daniele Tricoli, Debian (@eriol)
-
-We will notify these individuals at least a week ahead of our planned release
-date to ensure that they have sufficient time to prepare. If you believe you
-should be on this list, please let one of the maintainers know at one of the
-email addresses at the top of this article.
-
-On release day, we will push the patch to our public repository, along with an
-updated changelog that describes the issue and credits you. We will then issue
-a PyPI release containing the patch.
-
-At this point, we will publicise the release. This will involve mails to
-mailing lists, Tweets, and all other communication mechanisms available to the
-core team.
-
-We will also explicitly mention which commits contain the fix to make it easier
-for other distributors and users to easily patch their own versions of requests
-if upgrading is not an option.
-
-Previous CVEs
--------------
-
-- Fixed in 2.20.0
-  - `CVE 2018-18074 <https://cve.mitre.org/cgi-bin/cvename.cgi?name=2018-18074>`_
-
-- Fixed in 2.6.0
-
-  - `CVE 2015-2296 <https://cve.mitre.org/cgi-bin/cvename.cgi?name=2015-2296>`_,
-    reported by Matthew Daley of `BugFuzz <https://bugfuzz.com/>`_.
-
-- Fixed in 2.3.0
-
-  - `CVE 2014-1829 <https://cve.mitre.org/cgi-bin/cvename.cgi?name=2014-1829>`_
-
-  - `CVE 2014-1830 <https://cve.mitre.org/cgi-bin/cvename.cgi?name=2014-1830>`_
+The latest vulnerability disclosure information can be found on GitHub in our
+`Security Policy <https://github.com/psf/requests/blob/main/.github/SECURITY.md>`_.

docs/conf.py

@@ -58,7 +58,7 @@ master_doc = "index"
 
 # General information about the project.
 project = u"Requests"
-copyright = u'MMXVIX. A <a href="https://kenreitz.org/projects">Kenneth Reitz</a> Project'
+copyright = u'MMXVIX. A Kenneth Reitz Project'
 author = u"Kenneth Reitz"
 
 # The version info for the project you're documenting, acts as replacement for

docs/dev/contributing.rst

@@ -22,19 +22,17 @@ The guide is split into sections based on the type of contribution you're
 thinking of making, with a section that covers general guidelines for all
 contributors.
 
-Be Cordial
-----------
+Code of Conduct
+---------------
 
-    **Be cordial or be on your way**. *—Kenneth Reitz*
+The Python community is made up of members from around the globe with a diverse
+set of skills, personalities, and experiences. It is through these differences
+that our community experiences great successes and continued growth. When you're
+working with members of the community, follow the
+`Python Software Foundation Code of Conduct`_ to help steer your interactions
+and keep Python a positive, successful, and growing community.
 
-Requests has one very important rule governing all forms of contribution,
-including reporting bugs or requesting features. This golden rule is
-"`be cordial or be on your way`_".
-
-**All contributions are welcome**, as long as
-everyone involved is treated with respect.
-
-.. _be cordial or be on your way: https://kenreitz.org/essays/2013/01/27/be-cordial-or-be-on-your-way
+.. _Python Software Foundation Code of Conduct: https://policies.python.org/python.org/code-of-conduct/
 
 .. _early-feedback:
 
@@ -93,6 +91,21 @@ event that you object to the code review feedback, you should make your case
 clearly and calmly. If, after doing so, the feedback is judged to still apply,
 you must either apply the feedback or withdraw your contribution.
 
+Code Style
+~~~~~~~~~~
+
+Requests uses a collection of tools to ensure the code base has a consistent
+style as it grows. We have these orchestrated using a tool called
+`pre-commit`_. This can be installed locally and run over your changes prior
+to opening a PR, and will also be run as part of the CI approval process
+before a change is merged.
+
+You can find the full list of formatting requirements specified in the
+`.pre-commit-config.yaml`_ at the top level directory of Requests.
+
+.. _pre-commit: https://pre-commit.com/
+.. _.pre-commit-config.yaml: https://github.com/psf/requests/blob/main/.pre-commit-config.yaml
+
 New Contributors
 ~~~~~~~~~~~~~~~~
 
@@ -103,62 +116,6 @@ asking for help.
 
 Please also check the :ref:`early-feedback` section.
 
-Kenneth Reitz's Code Style™
-~~~~~~~~~~~~~~~~~~~~~~~~~~~
-
-The Requests codebase uses the `PEP 8`_ code style.
-
-In addition to the standards outlined in PEP 8, we have a few guidelines:
-
-- Line-length can exceed 79 characters, to 100, when convenient.
-- Line-length can exceed 100 characters, when doing otherwise would be *terribly* inconvenient.
-- Always use single-quoted strings (e.g. ``'#flatearth'``), unless a single-quote occurs within the string.
-
-Additionally, one of the styles that PEP8 recommends for `line continuations`_
-completely lacks all sense of taste, and is not to be permitted within
-the Requests codebase::
-
-    # Aligned with opening delimiter.
-    foo = long_function_name(var_one, var_two,
-                             var_three, var_four)
-
-No. Just don't. Please. This is much better::
-
-    foo = long_function_name(
-        var_one,
-        var_two,
-        var_three,
-        var_four,
-    )
-
-Docstrings are to follow the following syntaxes::
-
-    def the_earth_is_flat():
-        """NASA divided up the seas into thirty-three degrees."""
-        pass
-
-::
-
-    def fibonacci_spiral_tool():
-        """With my feet upon the ground I lose myself / between the sounds
-        and open wide to suck it in. / I feel it move across my skin. / I'm
-        reaching up and reaching out. / I'm reaching for the random or
-        whatever will bewilder me. / Whatever will bewilder me. / And
-        following our will and wind we may just go where no one's been. /
-        We'll ride the spiral to the end and may just go where no one's
-        been.
-
-        Spiral out. Keep going...
-        """
-        pass
-
-All functions, methods, and classes are to contain docstrings. Object data
-model methods (e.g. ``__repr__``) are typically the exception to this rule.
-
-Thanks for helping to make the world a better place!
-
-.. _PEP 8: https://pep8.org/
-.. _line continuations: https://www.python.org/dev/peps/pep-0008/#indentation
 
 Documentation Contributions
 ---------------------------

docs/index.rst

@@ -9,7 +9,7 @@ Requests: HTTP for Humans™
 Release v\ |version|. (:ref:`Installation <install>`)
 
 
-.. image:: https://pepy.tech/badge/requests/month
+.. image:: https://static.pepy.tech/badge/requests/month
     :target: https://pepy.tech/project/requests
     :alt: Requests Downloads Per Month Badge
     
@@ -72,7 +72,7 @@ Requests is ready for today's web.
 - Chunked Requests
 - ``.netrc`` Support
 
-Requests officially supports Python 2.7 & 3.6+, and runs great on PyPy.
+Requests officially supports Python 3.9+, and runs great on PyPy.
 
 
 The User Guide

docs/requirements.txt

@@ -1,3 +1,3 @@
 # Pinning to avoid unexpected breakages.
 # Used by RTD to generate docs.
-Sphinx==4.2.0
+Sphinx==7.2.6

docs/user/advanced.rst

@@ -291,7 +291,7 @@ versions of Requests.
 For the sake of security we recommend upgrading certifi frequently!
 
 .. _HTTP persistent connection: https://en.wikipedia.org/wiki/HTTP_persistent_connection
-.. _connection pooling: https://urllib3.readthedocs.io/en/latest/reference/index.html#module-urllib3.connectionpool
+.. _connection pooling: https://urllib3.readthedocs.io/en/latest/reference/urllib3.connectionpool.html
 .. _certifi: https://certifiio.readthedocs.io/
 .. _Mozilla trust store: https://hg.mozilla.org/mozilla-central/raw-file/tip/security/nss/lib/ckfw/builtins/certdata.txt
 
@@ -603,15 +603,25 @@ Alternatively you can configure it once for an entire
 
     session.get('http://example.org')
 
-When the proxies configuration is not overridden in python as shown above,
-by default Requests relies on the proxy configuration defined by standard
-environment variables ``http_proxy``, ``https_proxy``, ``no_proxy`` and
-``curl_ca_bundle``. Uppercase variants of these variables are also supported.
+.. warning::  Setting ``session.proxies`` may behave differently than expected.
+    Values provided will be overwritten by environmental proxies
+    (those returned by `urllib.request.getproxies <https://docs.python.org/3/library/urllib.request.html#urllib.request.getproxies>`_).
+    To ensure the use of proxies in the presence of environmental proxies,
+    explicitly specify the ``proxies`` argument on all individual requests as
+    initially explained above.
+
+    See `#2018 <https://github.com/psf/requests/issues/2018>`_ for details.
+
+When the proxies configuration is not overridden per request as shown above,
+Requests relies on the proxy configuration defined by standard
+environment variables ``http_proxy``, ``https_proxy``, ``no_proxy``,
+and ``all_proxy``. Uppercase variants of these variables are also supported.
 You can therefore set them to configure Requests (only set the ones relevant
 to your needs)::
 
     $ export HTTP_PROXY="http://10.10.1.10:3128"
     $ export HTTPS_PROXY="http://10.10.1.10:1080"
+    $ export ALL_PROXY="socks5://10.10.1.10:3434"
 
     $ python
     >>> import requests
@@ -646,16 +656,18 @@ certificates trusted by Requests can be found with::
     from requests.utils import DEFAULT_CA_BUNDLE_PATH
     print(DEFAULT_CA_BUNDLE_PATH)
 
-You override this default certificate bundle by setting the standard
-``curl_ca_bundle`` environment variable to another file path::
+You override this default certificate bundle by setting the ``REQUESTS_CA_BUNDLE``
+(or ``CURL_CA_BUNDLE``) environment variable to another file path::
 
-    $ export curl_ca_bundle="/usr/local/myproxy_info/cacert.pem"
+    $ export REQUESTS_CA_BUNDLE="/usr/local/myproxy_info/cacert.pem"
     $ export https_proxy="http://10.10.1.10:1080"
 
     $ python
     >>> import requests
     >>> requests.get('https://example.org')
 
+.. _socks:
+
 SOCKS
 ^^^^^
 
@@ -669,7 +681,7 @@ You can get the dependencies for this feature from ``pip``:
 
 .. code-block:: bash
 
-    $ python -m pip install requests[socks]
+    $ python -m pip install 'requests[socks]'
 
 Once you've installed those dependencies, using a SOCKS proxy is just as easy
 as using a HTTP one::
@@ -707,10 +719,9 @@ If ``chardet`` is installed, ``requests`` uses it, however for python3
 library is an LGPL-licenced dependency and some users of requests
 cannot depend on mandatory LGPL-licensed dependencies.
 
-When you install ``request`` without specifying ``[use_chardet_on_py3]]`` extra,
+When you install ``requests`` without specifying ``[use_chardet_on_py3]`` extra,
 and ``chardet`` is not already installed, ``requests`` uses ``charset-normalizer``
-(MIT-licensed) to guess the encoding. For Python 2, ``requests`` uses only
-``chardet`` and is a mandatory dependency there.
+(MIT-licensed) to guess the encoding.
 
 The only time Requests will not guess the encoding is if no explicit charset
 is present in the HTTP headers **and** the ``Content-Type``
@@ -937,7 +948,7 @@ Link Headers
 Many HTTP APIs feature Link headers. They make APIs more self describing and
 discoverable.
 
-GitHub uses these for `pagination <https://developer.github.com/v3/#pagination>`_
+GitHub uses these for `pagination <https://docs.github.com/en/rest/guides/using-pagination-in-the-rest-api>`_
 in their API, for example::
 
     >>> url = 'https://api.github.com/users/kennethreitz/repos?page=1&per_page=10'
@@ -958,11 +969,9 @@ Requests will automatically parse these link headers and make them easily consum
 Transport Adapters
 ------------------
 
-As of v1.0.0, Requests has moved to a modular internal design. Part of the
-reason this was done was to implement Transport Adapters, originally
-`described here`_. Transport Adapters provide a mechanism to define interaction
-methods for an HTTP service. In particular, they allow you to apply per-service
-configuration.
+As of v1.0.0, Requests has moved to a modular internal design using Transport
+Adapters. These objects provide a mechanism to define interaction methods for an
+HTTP service. In particular, they allow you to apply per-service configuration.
 
 Requests ships with a single Transport Adapter, the :class:`HTTPAdapter
 <requests.adapters.HTTPAdapter>`. This adapter provides the default Requests
@@ -985,6 +994,10 @@ The mount call registers a specific instance of a Transport Adapter to a
 prefix. Once mounted, any HTTP request made using that session whose URL starts
 with the given prefix will use the given Transport Adapter.
 
+.. note:: The adapter will be chosen based on a longest prefix match. Be mindful
+   prefixes such as ``http://localhost`` will also match ``http://localhost.other.com``
+   or ``http://localhost@other.com``. It's recommended to terminate full hostnames with a ``/``.
+
 Many of the details of implementing a Transport Adapter are beyond the scope of
 this documentation, but take a look at the next example for a simple SSL use-
 case. For more than that, you might look at subclassing the
@@ -1017,8 +1030,29 @@ library to use SSLv3::
                 num_pools=connections, maxsize=maxsize,
                 block=block, ssl_version=ssl.PROTOCOL_SSLv3)
 
-.. _`described here`: https://kenreitz.org/essays/2012/06/14/the-future-of-python-http
+Example: Automatic Retries
+^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+By default, Requests does not retry failed connections. However, it is possible
+to implement automatic retries with a powerful array of features, including
+backoff, within a Requests :class:`Session <requests.Session>` using the
+`urllib3.util.Retry`_ class::
+
+    from urllib3.util import Retry
+    from requests import Session
+    from requests.adapters import HTTPAdapter
+
+    s = Session()
+    retries = Retry(
+        total=3,
+        backoff_factor=0.1,
+        status_forcelist=[502, 503, 504],
+        allowed_methods={'POST'},
+    )
+    s.mount('https://', HTTPAdapter(max_retries=retries))
+
 .. _`urllib3`: https://github.com/urllib3/urllib3
+.. _`urllib3.util.Retry`: https://urllib3.readthedocs.io/en/stable/reference/urllib3.util.html#urllib3.util.Retry
 
 .. _blocking-or-nonblocking:
 
@@ -1046,7 +1080,7 @@ Header Ordering
 
 In unusual circumstances you may want to provide headers in an ordered manner. If you pass an ``OrderedDict`` to the ``headers`` keyword argument, that will provide the headers with an ordering. *However*, the ordering of the default headers used by Requests will be preferred, which means that if you override default headers in the ``headers`` keyword argument, they may appear out of order compared to other headers in that keyword argument.
 
-If this is problematic, users should consider setting the default headers on a :class:`Session <requests.Session>` object, by setting :attr:`Session <requests.Session.headers>` to a custom ``OrderedDict``. That ordering will always be preferred.
+If this is problematic, users should consider setting the default headers on a :class:`Session <requests.Session>` object, by setting :attr:`Session.headers <requests.Session.headers>` to a custom ``OrderedDict``. That ordering will always be preferred.
 
 .. _timeouts:
 
@@ -1062,7 +1096,7 @@ The **connect** timeout is the number of seconds Requests will wait for your
 client to establish a connection to a remote machine (corresponding to the
 `connect()`_) call on the socket. It's a good practice to set connect timeouts
 to slightly larger than a multiple of 3, which is the default `TCP packet
-retransmission window <https://www.hjp.at/doc/rfc/rfc2988.txt>`_.
+retransmission window <https://datatracker.ietf.org/doc/html/rfc2988>`_.
 
 Once your client has connected to the server and sent the HTTP request, the
 **read** timeout is the number of seconds the client will wait for the server
@@ -1087,4 +1121,18 @@ coffee.
 
     r = requests.get('https://github.com', timeout=None)
 
+.. note:: The connect timeout applies to each connection attempt to an IP address.
+          If multiple addresses exist for a domain name, the underlying ``urllib3`` will
+          try each address sequentially until one successfully connects.
+          This may lead to an effective total connection timeout *multiple* times longer
+          than the specified time, e.g. an unresponsive server having both IPv4 and IPv6
+          addresses will have its perceived timeout *doubled*, so take that into account
+          when setting the connection timeout.
+.. note:: Neither the connect nor read timeouts are `wall clock`_. This means
+          that if you start a request, and look at the time, and then look at
+          the time when the request finishes or times out, the real-world time
+          may be greater than what you specified.
+
+
+.. _`wall clock`: https://wiki.php.net/rfc/max_execution_wall_time
 .. _`connect()`: https://linux.die.net/man/2/connect

docs/user/authentication.rst

@@ -44,6 +44,16 @@ set with `headers=`.
 If credentials for the hostname are found, the request is sent with HTTP Basic
 Auth.
 
+Requests will search for the netrc file at `~/.netrc`, `~/_netrc`, or at the path
+specified by the `NETRC` environment variable. `~` denotes the user's home
+directory, which is `$HOME` on Unix based systems and `%USERPROFILE%` on Windows.
+
+Usage of netrc file can be disabled by setting `trust_env` to `False` in the
+Requests session::
+
+    >>> s = requests.Session()
+    >>> s.trust_env = False
+    >>> s.get('https://httpbin.org/basic-auth/user/pass')
 
 Digest Authentication
 ---------------------

docs/user/install.rst

@@ -22,7 +22,7 @@ Requests is actively developed on GitHub, where the code is
 
 You can either clone the public repository::
 
-    $ git clone git://github.com/psf/requests.git
+    $ git clone https://github.com/psf/requests.git
 
 Or, download the `tarball <https://github.com/psf/requests/tarball/main>`_::
 

docs/user/quickstart.rst

@@ -129,7 +129,7 @@ You can also access the response body as bytes, for non-text requests::
 The ``gzip`` and ``deflate`` transfer-encodings are automatically decoded for you.
 
 The ``br``  transfer-encoding is automatically decoded for you if a Brotli library
-like `brotli <https://pypi.org/project/brotli>`_ or `brotlicffi <https://pypi.org/project/brotli>`_ is installed.
+like `brotli <https://pypi.org/project/brotli>`_ or `brotlicffi <https://pypi.org/project/brotlicffi>`_ is installed.
 
 For example, to create an image from binary data returned by a request, you can
 use the following code::
@@ -177,7 +177,7 @@ server, you can access ``r.raw``. If you want to do this, make sure you set
     <urllib3.response.HTTPResponse object at 0x101194810>
 
     >>> r.raw.read(10)
-    '\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03'
+    b'\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\x03'
 
 In general, however, you should use a pattern like this to save what is being
 streamed to a file::
@@ -201,6 +201,8 @@ may better fit your use cases.
    were returned, use ``Response.raw``.
 
 
+.. _custom-headers:
+
 Custom Headers
 --------------
 
@@ -220,6 +222,7 @@ Note: Custom headers are given less precedence than more specific sources of inf
   are specified in ``.netrc``, which in turn will be overridden by the  ``auth=``
   parameter. Requests will search for the netrc file at `~/.netrc`, `~/_netrc`,
   or at the path specified by the `NETRC` environment variable.
+  Check details in :ref:`netrc authentication <authentication>`.
 * Authorization headers will be removed if you get redirected off-host.
 * Proxy-Authorization headers will be overridden by proxy credentials provided in the URL.
 * Content-Length headers will be overridden when we can determine the length of the content.
@@ -237,7 +240,7 @@ dictionary of data will automatically be form-encoded when the request is made::
 
     >>> payload = {'key1': 'value1', 'key2': 'value2'}
 
-    >>> r = requests.post("https://httpbin.org/post", data=payload)
+    >>> r = requests.post('https://httpbin.org/post', data=payload)
     >>> print(r.text)
     {
       ...
@@ -566,6 +569,3 @@ All exceptions that Requests explicitly raises inherit from
 -----------------------
 
 Ready for more? Check out the :ref:`advanced <advanced>` section.
-
-
-If you're on the job market, consider taking `this programming quiz <https://triplebyte.com/a/b1i2FB8/requests-docs-1>`_. A substantial donation will be made to this project, if you find a job through this platform.

pyproject.toml

@@ -0,0 +1,10 @@
+[tool.isort]
+profile = "black"
+src_paths = ["src/requests", "test"]
+honor_noqa = true
+
+[tool.pytest.ini_options]
+addopts = "--doctest-modules"
+doctest_optionflags = "NORMALIZE_WHITESPACE ELLIPSIS"
+minversion = "6.2"
+testpaths = ["tests"]

pytest.ini

@@ -1,3 +0,0 @@
-[pytest]
-addopts = -p no:warnings --doctest-modules
-doctest_optionflags= NORMALIZE_WHITESPACE ELLIPSIS

requests/__version__.py

@@ -1,14 +0,0 @@
-# .-. .-. .-. . . .-. .-. .-. .-.
-# |(  |-  |.| | | |-  `-.  |  `-.
-# ' ' `-' `-`.`-' `-' `-'  '  `-'
-
-__title__ = 'requests'
-__description__ = 'Python HTTP for Humans.'
-__url__ = 'https://requests.readthedocs.io'
-__version__ = '2.27.1'
-__build__ = 0x022701
-__author__ = 'Kenneth Reitz'
-__author_email__ = 'me@kennethreitz.org'
-__license__ = 'Apache 2.0'
-__copyright__ = 'Copyright 2022 Kenneth Reitz'
-__cake__ = u'\u2728 \U0001f370 \u2728'

requests/compat.py

@@ -1,81 +0,0 @@
-# -*- coding: utf-8 -*-
-
-"""
-requests.compat
-~~~~~~~~~~~~~~~
-
-This module handles import compatibility issues between Python 2 and
-Python 3.
-"""
-
-try:
-    import chardet
-except ImportError:
-    import charset_normalizer as chardet
-
-import sys
-
-# -------
-# Pythons
-# -------
-
-# Syntax sugar.
-_ver = sys.version_info
-
-#: Python 2.x?
-is_py2 = (_ver[0] == 2)
-
-#: Python 3.x?
-is_py3 = (_ver[0] == 3)
-
-has_simplejson = False
-try:
-    import simplejson as json
-    has_simplejson = True
-except ImportError:
-    import json
-
-# ---------
-# Specifics
-# ---------
-
-if is_py2:
-    from urllib import (
-        quote, unquote, quote_plus, unquote_plus, urlencode, getproxies,
-        proxy_bypass, proxy_bypass_environment, getproxies_environment)
-    from urlparse import urlparse, urlunparse, urljoin, urlsplit, urldefrag
-    from urllib2 import parse_http_list
-    import cookielib
-    from Cookie import Morsel
-    from StringIO import StringIO
-    # Keep OrderedDict for backwards compatibility.
-    from collections import Callable, Mapping, MutableMapping, OrderedDict
-
-    builtin_str = str
-    bytes = str
-    str = unicode
-    basestring = basestring
-    numeric_types = (int, long, float)
-    integer_types = (int, long)
-    JSONDecodeError = ValueError
-
-elif is_py3:
-    from urllib.parse import urlparse, urlunparse, urljoin, urlsplit, urlencode, quote, unquote, quote_plus, unquote_plus, urldefrag
-    from urllib.request import parse_http_list, getproxies, proxy_bypass, proxy_bypass_environment, getproxies_environment
-    from http import cookiejar as cookielib
-    from http.cookies import Morsel
-    from io import StringIO
-    # Keep OrderedDict for backwards compatibility.
-    from collections import OrderedDict
-    from collections.abc import Callable, Mapping, MutableMapping
-    if has_simplejson:
-        from simplejson import JSONDecodeError
-    else:
-        from json import JSONDecodeError
-
-    builtin_str = str
-    str = str
-    bytes = bytes
-    basestring = (str, bytes)
-    numeric_types = (int, float)
-    integer_types = (int,)

requests/help.py

@@ -1,135 +0,0 @@
-"""Module containing bug report helper(s)."""
-from __future__ import print_function
-
-import json
-import platform
-import sys
-import ssl
-
-import idna
-import urllib3
-
-from . import __version__ as requests_version
-
-try:
-    import charset_normalizer
-except ImportError:
-    charset_normalizer = None
-
-try:
-    import chardet
-except ImportError:
-    chardet = None
-
-try:
-    from urllib3.contrib import pyopenssl
-except ImportError:
-    pyopenssl = None
-    OpenSSL = None
-    cryptography = None
-else:
-    import OpenSSL
-    import cryptography
-
-
-def _implementation():
-    """Return a dict with the Python implementation and version.
-
-    Provide both the name and the version of the Python implementation
-    currently running. For example, on CPython 2.7.5 it will return
-    {'name': 'CPython', 'version': '2.7.5'}.
-
-    This function works best on CPython and PyPy: in particular, it probably
-    doesn't work for Jython or IronPython. Future investigation should be done
-    to work out the correct shape of the code for those platforms.
-    """
-    implementation = platform.python_implementation()
-
-    if implementation == 'CPython':
-        implementation_version = platform.python_version()
-    elif implementation == 'PyPy':
-        implementation_version = '%s.%s.%s' % (sys.pypy_version_info.major,
-                                               sys.pypy_version_info.minor,
-                                               sys.pypy_version_info.micro)
-        if sys.pypy_version_info.releaselevel != 'final':
-            implementation_version = ''.join([
-                implementation_version, sys.pypy_version_info.releaselevel
-            ])
-    elif implementation == 'Jython':
-        implementation_version = platform.python_version()  # Complete Guess
-    elif implementation == 'IronPython':
-        implementation_version = platform.python_version()  # Complete Guess
-    else:
-        implementation_version = 'Unknown'
-
-    return {'name': implementation, 'version': implementation_version}
-
-
-def info():
-    """Generate information for a bug report."""
-    try:
-        platform_info = {
-            'system': platform.system(),
-            'release': platform.release(),
-        }
-    except IOError:
-        platform_info = {
-            'system': 'Unknown',
-            'release': 'Unknown',
-        }
-
-    implementation_info = _implementation()
-    urllib3_info = {'version': urllib3.__version__}
-    charset_normalizer_info = {'version': None}
-    chardet_info = {'version': None}
-    if charset_normalizer:
-        charset_normalizer_info = {'version': charset_normalizer.__version__}
-    if chardet:
-        chardet_info = {'version': chardet.__version__}
-
-    pyopenssl_info = {
-        'version': None,
-        'openssl_version': '',
-    }
-    if OpenSSL:
-        pyopenssl_info = {
-            'version': OpenSSL.__version__,
-            'openssl_version': '%x' % OpenSSL.SSL.OPENSSL_VERSION_NUMBER,
-        }
-    cryptography_info = {
-        'version': getattr(cryptography, '__version__', ''),
-    }
-    idna_info = {
-        'version': getattr(idna, '__version__', ''),
-    }
-
-    system_ssl = ssl.OPENSSL_VERSION_NUMBER
-    system_ssl_info = {
-        'version': '%x' % system_ssl if system_ssl is not None else ''
-    }
-
-    return {
-        'platform': platform_info,
-        'implementation': implementation_info,
-        'system_ssl': system_ssl_info,
-        'using_pyopenssl': pyopenssl is not None,
-        'using_charset_normalizer': chardet is None,
-        'pyOpenSSL': pyopenssl_info,
-        'urllib3': urllib3_info,
-        'chardet': chardet_info,
-        'charset_normalizer': charset_normalizer_info,
-        'cryptography': cryptography_info,
-        'idna': idna_info,
-        'requests': {
-            'version': requests_version,
-        },
-    }
-
-
-def main():
-    """Pretty-print the bug information as JSON."""
-    print(json.dumps(info(), sort_keys=True, indent=2))
-
-
-if __name__ == '__main__':
-    main()

requests/packages.py

@@ -1,26 +0,0 @@
-import sys
-
-try:
-    import chardet
-except ImportError:
-    import charset_normalizer as chardet
-    import warnings
-
-    warnings.filterwarnings('ignore', 'Trying to detect', module='charset_normalizer')
-
-# This code exists for backwards compatibility reasons.
-# I don't like it either. Just look the other way. :)
-
-for package in ('urllib3', 'idna'):
-    locals()[package] = __import__(package)
-    # This traversal is apparently necessary such that the identities are
-    # preserved (requests.packages.urllib3.* is urllib3.*)
-    for mod in list(sys.modules):
-        if mod == package or mod.startswith(package + '.'):
-            sys.modules['requests.packages.' + mod] = sys.modules[mod]
-
-target = chardet.__name__
-for mod in list(sys.modules):
-    if mod == target or mod.startswith(target + '.'):
-        sys.modules['requests.packages.' + target.replace(target, 'chardet')] = sys.modules[mod]
-# Kinda cool, though, right?

requests/status_codes.py

@@ -1,123 +0,0 @@
-# -*- coding: utf-8 -*-
-
-r"""
-The ``codes`` object defines a mapping from common names for HTTP statuses
-to their numerical codes, accessible either as attributes or as dictionary
-items.
-
-Example::
-
-    >>> import requests
-    >>> requests.codes['temporary_redirect']
-    307
-    >>> requests.codes.teapot
-    418
-    >>> requests.codes['\o/']
-    200
-
-Some codes have multiple names, and both upper- and lower-case versions of
-the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
-``codes.okay`` all correspond to the HTTP status code 200.
-"""
-
-from .structures import LookupDict
-
-_codes = {
-
-    # Informational.
-    100: ('continue',),
-    101: ('switching_protocols',),
-    102: ('processing',),
-    103: ('checkpoint',),
-    122: ('uri_too_long', 'request_uri_too_long'),
-    200: ('ok', 'okay', 'all_ok', 'all_okay', 'all_good', '\\o/', '✓'),
-    201: ('created',),
-    202: ('accepted',),
-    203: ('non_authoritative_info', 'non_authoritative_information'),
-    204: ('no_content',),
-    205: ('reset_content', 'reset'),
-    206: ('partial_content', 'partial'),
-    207: ('multi_status', 'multiple_status', 'multi_stati', 'multiple_stati'),
-    208: ('already_reported',),
-    226: ('im_used',),
-
-    # Redirection.
-    300: ('multiple_choices',),
-    301: ('moved_permanently', 'moved', '\\o-'),
-    302: ('found',),
-    303: ('see_other', 'other'),
-    304: ('not_modified',),
-    305: ('use_proxy',),
-    306: ('switch_proxy',),
-    307: ('temporary_redirect', 'temporary_moved', 'temporary'),
-    308: ('permanent_redirect',
-          'resume_incomplete', 'resume',),  # These 2 to be removed in 3.0
-
-    # Client Error.
-    400: ('bad_request', 'bad'),
-    401: ('unauthorized',),
-    402: ('payment_required', 'payment'),
-    403: ('forbidden',),
-    404: ('not_found', '-o-'),
-    405: ('method_not_allowed', 'not_allowed'),
-    406: ('not_acceptable',),
-    407: ('proxy_authentication_required', 'proxy_auth', 'proxy_authentication'),
-    408: ('request_timeout', 'timeout'),
-    409: ('conflict',),
-    410: ('gone',),
-    411: ('length_required',),
-    412: ('precondition_failed', 'precondition'),
-    413: ('request_entity_too_large',),
-    414: ('request_uri_too_large',),
-    415: ('unsupported_media_type', 'unsupported_media', 'media_type'),
-    416: ('requested_range_not_satisfiable', 'requested_range', 'range_not_satisfiable'),
-    417: ('expectation_failed',),
-    418: ('im_a_teapot', 'teapot', 'i_am_a_teapot'),
-    421: ('misdirected_request',),
-    422: ('unprocessable_entity', 'unprocessable'),
-    423: ('locked',),
-    424: ('failed_dependency', 'dependency'),
-    425: ('unordered_collection', 'unordered'),
-    426: ('upgrade_required', 'upgrade'),
-    428: ('precondition_required', 'precondition'),
-    429: ('too_many_requests', 'too_many'),
-    431: ('header_fields_too_large', 'fields_too_large'),
-    444: ('no_response', 'none'),
-    449: ('retry_with', 'retry'),
-    450: ('blocked_by_windows_parental_controls', 'parental_controls'),
-    451: ('unavailable_for_legal_reasons', 'legal_reasons'),
-    499: ('client_closed_request',),
-
-    # Server Error.
-    500: ('internal_server_error', 'server_error', '/o\\', '✗'),
-    501: ('not_implemented',),
-    502: ('bad_gateway',),
-    503: ('service_unavailable', 'unavailable'),
-    504: ('gateway_timeout',),
-    505: ('http_version_not_supported', 'http_version'),
-    506: ('variant_also_negotiates',),
-    507: ('insufficient_storage',),
-    509: ('bandwidth_limit_exceeded', 'bandwidth'),
-    510: ('not_extended',),
-    511: ('network_authentication_required', 'network_auth', 'network_authentication'),
-}
-
-codes = LookupDict(name='status_codes')
-
-def _init():
-    for code, titles in _codes.items():
-        for title in titles:
-            setattr(codes, title, code)
-            if not title.startswith(('\\', '/')):
-                setattr(codes, title.upper(), code)
-
-    def doc(code):
-        names = ', '.join('``%s``' % n for n in _codes[code])
-        return '* %d: %s' % (code, names)
-
-    global __doc__
-    __doc__ = (__doc__ + '\n' +
-               '\n'.join(doc(code) for code in sorted(_codes))
-               if __doc__ is not None else None)
-
-_init()

requirements-dev.txt

@@ -1,8 +1,7 @@
-pytest>=2.8.0,<=6.2.5
+-e .[socks]
+pytest>=2.8.0,<9
 pytest-cov
-pytest-httpbin==1.0.0
-pytest-mock==2.0.0
-httpbin==0.7.0
-Flask>=1.0,<2.0
+pytest-httpbin==2.1.0
+httpbin~=0.10.0
 trustme
 wheel

setup.cfg

@@ -1,5 +1,17 @@
-[bdist_wheel]
-universal = 1
-
 [metadata]
 license_file = LICENSE
+provides-extra =
+    socks
+    use_chardet_on_py3
+requires-dist =
+    certifi>=2017.4.17
+    charset_normalizer>=2,<4
+    idna>=2.5,<4
+    urllib3>=1.21.1,<3
+
+[flake8]
+ignore = E203, E501, W503
+per-file-ignores =
+    src/requests/__init__.py:E402, F401
+    src/requests/compat.py:E402, F401
+    tests/compat.py:F401

setup.py

@@ -1,118 +1,107 @@
 #!/usr/bin/env python
-# Learn more: https://github.com/kennethreitz/setup.py
 import os
 import sys
-
 from codecs import open
 
 from setuptools import setup
-from setuptools.command.test import test as TestCommand
 
-here = os.path.abspath(os.path.dirname(__file__))
+CURRENT_PYTHON = sys.version_info[:2]
+REQUIRED_PYTHON = (3, 9)
 
-class PyTest(TestCommand):
-    user_options = [('pytest-args=', 'a', "Arguments to pass into py.test")]
+if CURRENT_PYTHON < REQUIRED_PYTHON:
+    sys.stderr.write(
+        """
+==========================
+Unsupported Python version
+==========================
+This version of Requests requires at least Python {}.{}, but
+you're trying to install it on Python {}.{}. To resolve this,
+consider upgrading to a supported Python version.
 
-    def initialize_options(self):
-        TestCommand.initialize_options(self)
-        try:
-            from multiprocessing import cpu_count
-            self.pytest_args = ['-n', str(cpu_count()), '--boxed']
-        except (ImportError, NotImplementedError):
-            self.pytest_args = ['-n', '1', '--boxed']
+If you can't upgrade your Python version, you'll need to
+pin to an older version of Requests (<2.32.0).
+""".format(
+            *(REQUIRED_PYTHON + CURRENT_PYTHON)
+        )
+    )
+    sys.exit(1)
 
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = []
-        self.test_suite = True
-
-    def run_tests(self):
-        import pytest
-
-        errno = pytest.main(self.pytest_args)
-        sys.exit(errno)
 
 # 'setup.py publish' shortcut.
-if sys.argv[-1] == 'publish':
-    os.system('python setup.py sdist bdist_wheel')
-    os.system('twine upload dist/*')
+if sys.argv[-1] == "publish":
+    os.system("python setup.py sdist bdist_wheel")
+    os.system("twine upload dist/*")
     sys.exit()
 
-packages = ['requests']
-
 requires = [
-    'charset_normalizer~=2.0.0; python_version >= "3"',
-    'chardet>=3.0.2,<5; python_version < "3"',
-    'idna>=2.5,<3; python_version < "3"',
-    'idna>=2.5,<4; python_version >= "3"',
-    'urllib3>=1.21.1,<1.27',
-    'certifi>=2017.4.17'
-
+    "charset_normalizer>=2,<4",
+    "idna>=2.5,<4",
+    "urllib3>=1.21.1,<3",
+    "certifi>=2017.4.17",
 ]
 test_requirements = [
-    'pytest-httpbin==0.0.7',
-    'pytest-cov',
-    'pytest-mock',
-    'pytest-xdist',
-    'PySocks>=1.5.6, !=1.5.7',
-    'pytest>=3'
+    "pytest-httpbin==2.1.0",
+    "pytest-cov",
+    "pytest-mock",
+    "pytest-xdist",
+    "PySocks>=1.5.6, !=1.5.7",
+    "pytest>=3",
 ]
 
 about = {}
-with open(os.path.join(here, 'requests', '__version__.py'), 'r', 'utf-8') as f:
+here = os.path.abspath(os.path.dirname(__file__))
+with open(os.path.join(here, "src", "requests", "__version__.py"), "r", "utf-8") as f:
     exec(f.read(), about)
 
-with open('README.md', 'r', 'utf-8') as f:
+with open("README.md", "r", "utf-8") as f:
     readme = f.read()
 
 setup(
-    name=about['__title__'],
-    version=about['__version__'],
-    description=about['__description__'],
+    name=about["__title__"],
+    version=about["__version__"],
+    description=about["__description__"],
     long_description=readme,
-    long_description_content_type='text/markdown',
-    author=about['__author__'],
-    author_email=about['__author_email__'],
-    url=about['__url__'],
-    packages=packages,
-    package_data={'': ['LICENSE', 'NOTICE']},
-    package_dir={'requests': 'requests'},
+    long_description_content_type="text/markdown",
+    author=about["__author__"],
+    author_email=about["__author_email__"],
+    url=about["__url__"],
+    packages=["requests"],
+    package_data={"": ["LICENSE", "NOTICE"]},
+    package_dir={"": "src"},
     include_package_data=True,
-    python_requires=">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*, !=3.5.*",
+    python_requires=">=3.9",
     install_requires=requires,
-    license=about['__license__'],
+    license=about["__license__"],
     zip_safe=False,
     classifiers=[
-        'Development Status :: 5 - Production/Stable',
-        'Environment :: Web Environment',
-        'Intended Audience :: Developers',
-        'License :: OSI Approved :: Apache Software License',
-        'Natural Language :: English',
-        'Operating System :: OS Independent',
-        'Programming Language :: Python',
-        'Programming Language :: Python :: 2',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.6',
-        'Programming Language :: Python :: 3.7',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
-        'Programming Language :: Python :: 3.10',
-        'Programming Language :: Python :: Implementation :: CPython',
-        'Programming Language :: Python :: Implementation :: PyPy',
-        'Topic :: Internet :: WWW/HTTP',
-        'Topic :: Software Development :: Libraries',
+        "Development Status :: 5 - Production/Stable",
+        "Environment :: Web Environment",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: Apache Software License",
+        "Natural Language :: English",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.9",
+        "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
+        "Programming Language :: Python :: 3 :: Only",
+        "Programming Language :: Python :: Implementation :: CPython",
+        "Programming Language :: Python :: Implementation :: PyPy",
+        "Topic :: Internet :: WWW/HTTP",
+        "Topic :: Software Development :: Libraries",
     ],
-    cmdclass={'test': PyTest},
     tests_require=test_requirements,
     extras_require={
-        'security': [],
-        'socks': ['PySocks>=1.5.6, !=1.5.7'],
-        'socks:sys_platform == "win32" and python_version == "2.7"': ['win_inet_pton'],
-        'use_chardet_on_py3': ['chardet>=3.0.2,<5']
+        "security": [],
+        "socks": ["PySocks>=1.5.6, !=1.5.7"],
+        "use_chardet_on_py3": ["chardet>=3.0.2,<6"],
     },
     project_urls={
-        'Documentation': 'https://requests.readthedocs.io',
-        'Source': 'https://github.com/psf/requests',
+        "Documentation": "https://requests.readthedocs.io",
+        "Source": "https://github.com/psf/requests",
     },
 )

src/requests/__init__.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 #   __
 #  /__)  _  _     _   _ _/   _
 # / (   (- (/ (/ (- _)  /  _)
@@ -40,8 +38,10 @@ is at <https://requests.readthedocs.io>.
 :license: Apache 2.0, see LICENSE for more details.
 """
 
-import urllib3
 import warnings
+
+import urllib3
+
 from .exceptions import RequestsDependencyWarning
 
 try:
@@ -54,54 +54,69 @@ try:
 except ImportError:
     chardet_version = None
 
+
 def check_compatibility(urllib3_version, chardet_version, charset_normalizer_version):
-    urllib3_version = urllib3_version.split('.')
-    assert urllib3_version != ['dev']  # Verify urllib3 isn't installed from git.
+    urllib3_version = urllib3_version.split(".")
+    assert urllib3_version != ["dev"]  # Verify urllib3 isn't installed from git.
 
     # Sometimes, urllib3 only reports its version as 16.1.
     if len(urllib3_version) == 2:
-        urllib3_version.append('0')
+        urllib3_version.append("0")
 
     # Check urllib3 for compatibility.
     major, minor, patch = urllib3_version  # noqa: F811
     major, minor, patch = int(major), int(minor), int(patch)
-    # urllib3 >= 1.21.1, <= 1.26
-    assert major == 1
-    assert minor >= 21
-    assert minor <= 26
+    # urllib3 >= 1.21.1
+    assert major >= 1
+    if major == 1:
+        assert minor >= 21
 
     # Check charset_normalizer for compatibility.
     if chardet_version:
-        major, minor, patch = chardet_version.split('.')[:3]
+        major, minor, patch = chardet_version.split(".")[:3]
         major, minor, patch = int(major), int(minor), int(patch)
-        # chardet_version >= 3.0.2, < 5.0.0
-        assert (3, 0, 2) <= (major, minor, patch) < (5, 0, 0)
+        # chardet_version >= 3.0.2, < 6.0.0
+        assert (3, 0, 2) <= (major, minor, patch) < (6, 0, 0)
     elif charset_normalizer_version:
-        major, minor, patch = charset_normalizer_version.split('.')[:3]
+        major, minor, patch = charset_normalizer_version.split(".")[:3]
         major, minor, patch = int(major), int(minor), int(patch)
-        # charset_normalizer >= 2.0.0 < 3.0.0
-        assert (2, 0, 0) <= (major, minor, patch) < (3, 0, 0)
+        # charset_normalizer >= 2.0.0 < 4.0.0
+        assert (2, 0, 0) <= (major, minor, patch) < (4, 0, 0)
     else:
-        raise Exception("You need either charset_normalizer or chardet installed")
+        warnings.warn(
+            "Unable to find acceptable character detection dependency "
+            "(chardet or charset_normalizer).",
+            RequestsDependencyWarning,
+        )
+
 
 def _check_cryptography(cryptography_version):
     # cryptography < 1.3.4
     try:
-        cryptography_version = list(map(int, cryptography_version.split('.')))
+        cryptography_version = list(map(int, cryptography_version.split(".")))
     except ValueError:
         return
 
     if cryptography_version < [1, 3, 4]:
-        warning = 'Old version of cryptography ({}) may cause slowdown.'.format(cryptography_version)
+        warning = "Old version of cryptography ({}) may cause slowdown.".format(
+            cryptography_version
+        )
         warnings.warn(warning, RequestsDependencyWarning)
 
+
 # Check imported dependencies for compatibility.
 try:
-    check_compatibility(urllib3.__version__, chardet_version, charset_normalizer_version)
+    check_compatibility(
+        urllib3.__version__, chardet_version, charset_normalizer_version
+    )
 except (AssertionError, ValueError):
-    warnings.warn("urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn't match a supported "
-                  "version!".format(urllib3.__version__, chardet_version, charset_normalizer_version),
-                  RequestsDependencyWarning)
+    warnings.warn(
+        "urllib3 ({}) or chardet ({})/charset_normalizer ({}) doesn't match a supported "
+        "version!".format(
+            urllib3.__version__, chardet_version, charset_normalizer_version
+        ),
+        RequestsDependencyWarning,
+    )
 
 # Attempt to enable urllib3's fallback for SNI support
 # if the standard library doesn't support SNI or the
@@ -114,39 +129,56 @@ try:
 
     if not getattr(ssl, "HAS_SNI", False):
         from urllib3.contrib import pyopenssl
+
         pyopenssl.inject_into_urllib3()
 
         # Check cryptography version
         from cryptography import __version__ as cryptography_version
+
         _check_cryptography(cryptography_version)
 except ImportError:
     pass
 
 # urllib3's DependencyWarnings should be silenced.
 from urllib3.exceptions import DependencyWarning
-warnings.simplefilter('ignore', DependencyWarning)
 
-from .__version__ import __title__, __description__, __url__, __version__
-from .__version__ import __build__, __author__, __author_email__, __license__
-from .__version__ import __copyright__, __cake__
-
-from . import utils
-from . import packages
-from .models import Request, Response, PreparedRequest
-from .api import request, get, head, post, patch, put, delete, options
-from .sessions import session, Session
-from .status_codes import codes
-from .exceptions import (
-    RequestException, Timeout, URLRequired,
-    TooManyRedirects, HTTPError, ConnectionError,
-    FileModeWarning, ConnectTimeout, ReadTimeout, JSONDecodeError
-)
+warnings.simplefilter("ignore", DependencyWarning)
 
 # Set default logging handler to avoid "No handler found" warnings.
 import logging
 from logging import NullHandler
 
+from . import packages, utils
+from .__version__ import (
+    __author__,
+    __author_email__,
+    __build__,
+    __cake__,
+    __copyright__,
+    __description__,
+    __license__,
+    __title__,
+    __url__,
+    __version__,
+)
+from .api import delete, get, head, options, patch, post, put, request
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    FileModeWarning,
+    HTTPError,
+    JSONDecodeError,
+    ReadTimeout,
+    RequestException,
+    Timeout,
+    TooManyRedirects,
+    URLRequired,
+)
+from .models import PreparedRequest, Request, Response
+from .sessions import Session, session
+from .status_codes import codes
+
 logging.getLogger(__name__).addHandler(NullHandler())
 
 # FileModeWarnings go off per the default.
-warnings.simplefilter('default', FileModeWarning, append=True)
+warnings.simplefilter("default", FileModeWarning, append=True)

src/requests/__version__.py

@@ -0,0 +1,14 @@
+# .-. .-. .-. . . .-. .-. .-. .-.
+# |(  |-  |.| | | |-  `-.  |  `-.
+# ' ' `-' `-`.`-' `-' `-'  '  `-'
+
+__title__ = "requests"
+__description__ = "Python HTTP for Humans."
+__url__ = "https://requests.readthedocs.io"
+__version__ = "2.32.5"
+__build__ = 0x023205
+__author__ = "Kenneth Reitz"
+__author_email__ = "me@kennethreitz.org"
+__license__ = "Apache-2.0"
+__copyright__ = "Copyright Kenneth Reitz"
+__cake__ = "\u2728 \U0001f370 \u2728"

src/requests/_internal_utils.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests._internal_utils
 ~~~~~~~~~~~~~~
@@ -7,11 +5,24 @@ requests._internal_utils
 Provides utility functions that are consumed internally by Requests
 which depend on extremely few external helpers (such as compat)
 """
+import re
 
-from .compat import is_py2, builtin_str, str
+from .compat import builtin_str
+
+_VALID_HEADER_NAME_RE_BYTE = re.compile(rb"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_NAME_RE_STR = re.compile(r"^[^:\s][^:\r\n]*$")
+_VALID_HEADER_VALUE_RE_BYTE = re.compile(rb"^\S[^\r\n]*$|^$")
+_VALID_HEADER_VALUE_RE_STR = re.compile(r"^\S[^\r\n]*$|^$")
+
+_HEADER_VALIDATORS_STR = (_VALID_HEADER_NAME_RE_STR, _VALID_HEADER_VALUE_RE_STR)
+_HEADER_VALIDATORS_BYTE = (_VALID_HEADER_NAME_RE_BYTE, _VALID_HEADER_VALUE_RE_BYTE)
+HEADER_VALIDATORS = {
+    bytes: _HEADER_VALIDATORS_BYTE,
+    str: _HEADER_VALIDATORS_STR,
+}
 
 
-def to_native_string(string, encoding='ascii'):
+def to_native_string(string, encoding="ascii"):
     """Given a string object, regardless of type, returns a representation of
     that string in the native string type, encoding and decoding where
     necessary. This assumes ASCII unless told otherwise.
@@ -19,10 +30,7 @@ def to_native_string(string, encoding='ascii'):
     if isinstance(string, builtin_str):
         out = string
     else:
-        if is_py2:
-            out = string.encode(encoding)
-        else:
-            out = string.decode(encoding)
+        out = string.decode(encoding)
 
     return out
 
@@ -36,7 +44,7 @@ def unicode_is_ascii(u_string):
     """
     assert isinstance(u_string, str)
     try:
-        u_string.encode('ascii')
+        u_string.encode("ascii")
         return True
     except UnicodeEncodeError:
         return False

src/requests/adapters.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.adapters
 ~~~~~~~~~~~~~~~~~
@@ -9,58 +7,118 @@ and maintain connections.
 """
 
 import os.path
-import socket
+import socket  # noqa: F401
+import typing
+import warnings
 
-from urllib3.poolmanager import PoolManager, proxy_from_url
-from urllib3.response import HTTPResponse
-from urllib3.util import parse_url
-from urllib3.util import Timeout as TimeoutSauce
-from urllib3.util.retry import Retry
-from urllib3.exceptions import ClosedPoolError
-from urllib3.exceptions import ConnectTimeoutError
+from urllib3.exceptions import ClosedPoolError, ConnectTimeoutError
 from urllib3.exceptions import HTTPError as _HTTPError
 from urllib3.exceptions import InvalidHeader as _InvalidHeader
-from urllib3.exceptions import MaxRetryError
-from urllib3.exceptions import NewConnectionError
+from urllib3.exceptions import (
+    LocationValueError,
+    MaxRetryError,
+    NewConnectionError,
+    ProtocolError,
+)
 from urllib3.exceptions import ProxyError as _ProxyError
-from urllib3.exceptions import ProtocolError
-from urllib3.exceptions import ReadTimeoutError
+from urllib3.exceptions import ReadTimeoutError, ResponseError
 from urllib3.exceptions import SSLError as _SSLError
-from urllib3.exceptions import ResponseError
-from urllib3.exceptions import LocationValueError
+from urllib3.poolmanager import PoolManager, proxy_from_url
+from urllib3.util import Timeout as TimeoutSauce
+from urllib3.util import parse_url
+from urllib3.util.retry import Retry
 
-from .models import Response
-from .compat import urlparse, basestring
-from .utils import (DEFAULT_CA_BUNDLE_PATH, extract_zipped_paths,
-                    get_encoding_from_headers, prepend_scheme_if_needed,
-                    get_auth_from_url, urldefragauth, select_proxy)
-from .structures import CaseInsensitiveDict
-from .cookies import extract_cookies_to_jar
-from .exceptions import (ConnectionError, ConnectTimeout, ReadTimeout, SSLError,
-                         ProxyError, RetryError, InvalidSchema, InvalidProxyURL,
-                         InvalidURL, InvalidHeader)
 from .auth import _basic_auth_str
+from .compat import basestring, urlparse
+from .cookies import extract_cookies_to_jar
+from .exceptions import (
+    ConnectionError,
+    ConnectTimeout,
+    InvalidHeader,
+    InvalidProxyURL,
+    InvalidSchema,
+    InvalidURL,
+    ProxyError,
+    ReadTimeout,
+    RetryError,
+    SSLError,
+)
+from .models import Response
+from .structures import CaseInsensitiveDict
+from .utils import (
+    DEFAULT_CA_BUNDLE_PATH,
+    extract_zipped_paths,
+    get_auth_from_url,
+    get_encoding_from_headers,
+    prepend_scheme_if_needed,
+    select_proxy,
+    urldefragauth,
+)
 
 try:
     from urllib3.contrib.socks import SOCKSProxyManager
 except ImportError:
+
     def SOCKSProxyManager(*args, **kwargs):
         raise InvalidSchema("Missing dependencies for SOCKS support.")
 
+
+if typing.TYPE_CHECKING:
+    from .models import PreparedRequest
+
+
 DEFAULT_POOLBLOCK = False
 DEFAULT_POOLSIZE = 10
 DEFAULT_RETRIES = 0
 DEFAULT_POOL_TIMEOUT = None
 
 
-class BaseAdapter(object):
+def _urllib3_request_context(
+    request: "PreparedRequest",
+    verify: "bool | str | None",
+    client_cert: "typing.Tuple[str, str] | str | None",
+    poolmanager: "PoolManager",
+) -> "(typing.Dict[str, typing.Any], typing.Dict[str, typing.Any])":
+    host_params = {}
+    pool_kwargs = {}
+    parsed_request_url = urlparse(request.url)
+    scheme = parsed_request_url.scheme.lower()
+    port = parsed_request_url.port
+
+    cert_reqs = "CERT_REQUIRED"
+    if verify is False:
+        cert_reqs = "CERT_NONE"
+    elif isinstance(verify, str):
+        if not os.path.isdir(verify):
+            pool_kwargs["ca_certs"] = verify
+        else:
+            pool_kwargs["ca_cert_dir"] = verify
+    pool_kwargs["cert_reqs"] = cert_reqs
+    if client_cert is not None:
+        if isinstance(client_cert, tuple) and len(client_cert) == 2:
+            pool_kwargs["cert_file"] = client_cert[0]
+            pool_kwargs["key_file"] = client_cert[1]
+        else:
+            # According to our docs, we allow users to specify just the client
+            # cert path
+            pool_kwargs["cert_file"] = client_cert
+    host_params = {
+        "scheme": scheme,
+        "host": parsed_request_url.hostname,
+        "port": port,
+    }
+    return host_params, pool_kwargs
+
+
+class BaseAdapter:
     """The Base Transport Adapter"""
 
     def __init__(self):
-        super(BaseAdapter, self).__init__()
+        super().__init__()
 
-    def send(self, request, stream=False, timeout=None, verify=True,
-             cert=None, proxies=None):
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
         """Sends PreparedRequest object. Returns Response object.
 
         :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
@@ -108,12 +166,22 @@ class HTTPAdapter(BaseAdapter):
       >>> a = requests.adapters.HTTPAdapter(max_retries=3)
       >>> s.mount('http://', a)
     """
-    __attrs__ = ['max_retries', 'config', '_pool_connections', '_pool_maxsize',
-                 '_pool_block']
 
-    def __init__(self, pool_connections=DEFAULT_POOLSIZE,
-                 pool_maxsize=DEFAULT_POOLSIZE, max_retries=DEFAULT_RETRIES,
-                 pool_block=DEFAULT_POOLBLOCK):
+    __attrs__ = [
+        "max_retries",
+        "config",
+        "_pool_connections",
+        "_pool_maxsize",
+        "_pool_block",
+    ]
+
+    def __init__(
+        self,
+        pool_connections=DEFAULT_POOLSIZE,
+        pool_maxsize=DEFAULT_POOLSIZE,
+        max_retries=DEFAULT_RETRIES,
+        pool_block=DEFAULT_POOLBLOCK,
+    ):
         if max_retries == DEFAULT_RETRIES:
             self.max_retries = Retry(0, read=False)
         else:
@@ -121,7 +189,7 @@ class HTTPAdapter(BaseAdapter):
         self.config = {}
         self.proxy_manager = {}
 
-        super(HTTPAdapter, self).__init__()
+        super().__init__()
 
         self._pool_connections = pool_connections
         self._pool_maxsize = pool_maxsize
@@ -141,10 +209,13 @@ class HTTPAdapter(BaseAdapter):
         for attr, value in state.items():
             setattr(self, attr, value)
 
-        self.init_poolmanager(self._pool_connections, self._pool_maxsize,
-                              block=self._pool_block)
+        self.init_poolmanager(
+            self._pool_connections, self._pool_maxsize, block=self._pool_block
+        )
 
-    def init_poolmanager(self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs):
+    def init_poolmanager(
+        self, connections, maxsize, block=DEFAULT_POOLBLOCK, **pool_kwargs
+    ):
         """Initializes a urllib3 PoolManager.
 
         This method should not be called from user code, and is only
@@ -161,8 +232,12 @@ class HTTPAdapter(BaseAdapter):
         self._pool_maxsize = maxsize
         self._pool_block = block
 
-        self.poolmanager = PoolManager(num_pools=connections, maxsize=maxsize,
-                                       block=block, strict=True, **pool_kwargs)
+        self.poolmanager = PoolManager(
+            num_pools=connections,
+            maxsize=maxsize,
+            block=block,
+            **pool_kwargs,
+        )
 
     def proxy_manager_for(self, proxy, **proxy_kwargs):
         """Return urllib3 ProxyManager for the given proxy.
@@ -178,7 +253,7 @@ class HTTPAdapter(BaseAdapter):
         """
         if proxy in self.proxy_manager:
             manager = self.proxy_manager[proxy]
-        elif proxy.lower().startswith('socks'):
+        elif proxy.lower().startswith("socks"):
             username, password = get_auth_from_url(proxy)
             manager = self.proxy_manager[proxy] = SOCKSProxyManager(
                 proxy,
@@ -187,7 +262,7 @@ class HTTPAdapter(BaseAdapter):
                 num_pools=self._pool_connections,
                 maxsize=self._pool_maxsize,
                 block=self._pool_block,
-                **proxy_kwargs
+                **proxy_kwargs,
             )
         else:
             proxy_headers = self.proxy_headers(proxy)
@@ -197,7 +272,8 @@ class HTTPAdapter(BaseAdapter):
                 num_pools=self._pool_connections,
                 maxsize=self._pool_maxsize,
                 block=self._pool_block,
-                **proxy_kwargs)
+                **proxy_kwargs,
+            )
 
         return manager
 
@@ -213,8 +289,7 @@ class HTTPAdapter(BaseAdapter):
             to a CA bundle to use
         :param cert: The SSL certificate to verify.
         """
-        if url.lower().startswith('https') and verify:
-
+        if url.lower().startswith("https") and verify:
             cert_loc = None
 
             # Allow self-specified cert location.
@@ -225,17 +300,19 @@ class HTTPAdapter(BaseAdapter):
                 cert_loc = extract_zipped_paths(DEFAULT_CA_BUNDLE_PATH)
 
             if not cert_loc or not os.path.exists(cert_loc):
-                raise IOError("Could not find a suitable TLS CA certificate bundle, "
-                              "invalid path: {}".format(cert_loc))
+                raise OSError(
+                    f"Could not find a suitable TLS CA certificate bundle, "
+                    f"invalid path: {cert_loc}"
+                )
 
-            conn.cert_reqs = 'CERT_REQUIRED'
+            conn.cert_reqs = "CERT_REQUIRED"
 
             if not os.path.isdir(cert_loc):
                 conn.ca_certs = cert_loc
             else:
                 conn.ca_cert_dir = cert_loc
         else:
-            conn.cert_reqs = 'CERT_NONE'
+            conn.cert_reqs = "CERT_NONE"
             conn.ca_certs = None
             conn.ca_cert_dir = None
 
@@ -247,11 +324,14 @@ class HTTPAdapter(BaseAdapter):
                 conn.cert_file = cert
                 conn.key_file = None
             if conn.cert_file and not os.path.exists(conn.cert_file):
-                raise IOError("Could not find the TLS certificate file, "
-                              "invalid path: {}".format(conn.cert_file))
+                raise OSError(
+                    f"Could not find the TLS certificate file, "
+                    f"invalid path: {conn.cert_file}"
+                )
             if conn.key_file and not os.path.exists(conn.key_file):
-                raise IOError("Could not find the TLS key file, "
-                              "invalid path: {}".format(conn.key_file))
+                raise OSError(
+                    f"Could not find the TLS key file, invalid path: {conn.key_file}"
+                )
 
     def build_response(self, req, resp):
         """Builds a :class:`Response <requests.Response>` object from a urllib3
@@ -266,10 +346,10 @@ class HTTPAdapter(BaseAdapter):
         response = Response()
 
         # Fallback to None if there's no status_code, for whatever reason.
-        response.status_code = getattr(resp, 'status', None)
+        response.status_code = getattr(resp, "status", None)
 
         # Make headers case-insensitive.
-        response.headers = CaseInsensitiveDict(getattr(resp, 'headers', {}))
+        response.headers = CaseInsensitiveDict(getattr(resp, "headers", {}))
 
         # Set encoding.
         response.encoding = get_encoding_from_headers(response.headers)
@@ -277,7 +357,7 @@ class HTTPAdapter(BaseAdapter):
         response.reason = response.raw.reason
 
         if isinstance(req.url, bytes):
-            response.url = req.url.decode('utf-8')
+            response.url = req.url.decode("utf-8")
         else:
             response.url = req.url
 
@@ -290,8 +370,110 @@ class HTTPAdapter(BaseAdapter):
 
         return response
 
+    def build_connection_pool_key_attributes(self, request, verify, cert=None):
+        """Build the PoolKey attributes used by urllib3 to return a connection.
+
+        This looks at the PreparedRequest, the user-specified verify value,
+        and the value of the cert parameter to determine what PoolKey values
+        to use to select a connection from a given urllib3 Connection Pool.
+
+        The SSL related pool key arguments are not consistently set. As of
+        this writing, use the following to determine what keys may be in that
+        dictionary:
+
+        * If ``verify`` is ``True``, ``"ssl_context"`` will be set and will be the
+          default Requests SSL Context
+        * If ``verify`` is ``False``, ``"ssl_context"`` will not be set but
+          ``"cert_reqs"`` will be set
+        * If ``verify`` is a string, (i.e., it is a user-specified trust bundle)
+          ``"ca_certs"`` will be set if the string is not a directory recognized
+          by :py:func:`os.path.isdir`, otherwise ``"ca_cert_dir"`` will be
+          set.
+        * If ``"cert"`` is specified, ``"cert_file"`` will always be set. If
+          ``"cert"`` is a tuple with a second item, ``"key_file"`` will also
+          be present
+
+        To override these settings, one may subclass this class, call this
+        method and use the above logic to change parameters as desired. For
+        example, if one wishes to use a custom :py:class:`ssl.SSLContext` one
+        must both set ``"ssl_context"`` and based on what else they require,
+        alter the other keys to ensure the desired behaviour.
+
+        :param request:
+            The PreparedReqest being sent over the connection.
+        :type request:
+            :class:`~requests.models.PreparedRequest`
+        :param verify:
+            Either a boolean, in which case it controls whether
+            we verify the server's TLS certificate, or a string, in which case it
+            must be a path to a CA bundle to use.
+        :param cert:
+            (optional) Any user-provided SSL certificate for client
+            authentication (a.k.a., mTLS). This may be a string (i.e., just
+            the path to a file which holds both certificate and key) or a
+            tuple of length 2 with the certificate file path and key file
+            path.
+        :returns:
+            A tuple of two dictionaries. The first is the "host parameters"
+            portion of the Pool Key including scheme, hostname, and port. The
+            second is a dictionary of SSLContext related parameters.
+        """
+        return _urllib3_request_context(request, verify, cert, self.poolmanager)
+
+    def get_connection_with_tls_context(self, request, verify, proxies=None, cert=None):
+        """Returns a urllib3 connection for the given request and TLS settings.
+        This should not be called from user code, and is only exposed for use
+        when subclassing the :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
+
+        :param request:
+            The :class:`PreparedRequest <PreparedRequest>` object to be sent
+            over the connection.
+        :param verify:
+            Either a boolean, in which case it controls whether we verify the
+            server's TLS certificate, or a string, in which case it must be a
+            path to a CA bundle to use.
+        :param proxies:
+            (optional) The proxies dictionary to apply to the request.
+        :param cert:
+            (optional) Any user-provided SSL certificate to be used for client
+            authentication (a.k.a., mTLS).
+        :rtype:
+            urllib3.ConnectionPool
+        """
+        proxy = select_proxy(request.url, proxies)
+        try:
+            host_params, pool_kwargs = self.build_connection_pool_key_attributes(
+                request,
+                verify,
+                cert,
+            )
+        except ValueError as e:
+            raise InvalidURL(e, request=request)
+        if proxy:
+            proxy = prepend_scheme_if_needed(proxy, "http")
+            proxy_url = parse_url(proxy)
+            if not proxy_url.host:
+                raise InvalidProxyURL(
+                    "Please check proxy URL. It is malformed "
+                    "and could be missing the host."
+                )
+            proxy_manager = self.proxy_manager_for(proxy)
+            conn = proxy_manager.connection_from_host(
+                **host_params, pool_kwargs=pool_kwargs
+            )
+        else:
+            # Only scheme should be lower case
+            conn = self.poolmanager.connection_from_host(
+                **host_params, pool_kwargs=pool_kwargs
+            )
+
+        return conn
+
     def get_connection(self, url, proxies=None):
-        """Returns a urllib3 connection for the given URL. This should not be
+        """DEPRECATED: Users should move to `get_connection_with_tls_context`
+        for all subclasses of HTTPAdapter using Requests>=2.32.2.
+
+        Returns a urllib3 connection for the given URL. This should not be
         called from user code, and is only exposed for use when subclassing the
         :class:`HTTPAdapter <requests.adapters.HTTPAdapter>`.
 
@@ -299,14 +481,25 @@ class HTTPAdapter(BaseAdapter):
         :param proxies: (optional) A Requests-style dictionary of proxies used on this request.
         :rtype: urllib3.ConnectionPool
         """
+        warnings.warn(
+            (
+                "`get_connection` has been deprecated in favor of "
+                "`get_connection_with_tls_context`. Custom HTTPAdapter subclasses "
+                "will need to migrate for Requests>=2.32.2. Please see "
+                "https://github.com/psf/requests/pull/6710 for more details."
+            ),
+            DeprecationWarning,
+        )
         proxy = select_proxy(url, proxies)
 
         if proxy:
-            proxy = prepend_scheme_if_needed(proxy, 'http')
+            proxy = prepend_scheme_if_needed(proxy, "http")
             proxy_url = parse_url(proxy)
             if not proxy_url.host:
-                raise InvalidProxyURL("Please check proxy URL. It is malformed"
-                                      " and could be missing the host.")
+                raise InvalidProxyURL(
+                    "Please check proxy URL. It is malformed "
+                    "and could be missing the host."
+                )
             proxy_manager = self.proxy_manager_for(proxy)
             conn = proxy_manager.connection_from_url(url)
         else:
@@ -344,13 +537,16 @@ class HTTPAdapter(BaseAdapter):
         proxy = select_proxy(request.url, proxies)
         scheme = urlparse(request.url).scheme
 
-        is_proxied_http_request = (proxy and scheme != 'https')
+        is_proxied_http_request = proxy and scheme != "https"
         using_socks_proxy = False
         if proxy:
             proxy_scheme = urlparse(proxy).scheme.lower()
-            using_socks_proxy = proxy_scheme.startswith('socks')
+            using_socks_proxy = proxy_scheme.startswith("socks")
 
         url = request.path_url
+        if url.startswith("//"):  # Don't confuse urllib3
+            url = f"/{url.lstrip('/')}"
+
         if is_proxied_http_request and not using_socks_proxy:
             url = urldefragauth(request.url)
 
@@ -387,12 +583,13 @@ class HTTPAdapter(BaseAdapter):
         username, password = get_auth_from_url(proxy)
 
         if username:
-            headers['Proxy-Authorization'] = _basic_auth_str(username,
-                                                             password)
+            headers["Proxy-Authorization"] = _basic_auth_str(username, password)
 
         return headers
 
-    def send(self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None):
+    def send(
+        self, request, stream=False, timeout=None, verify=True, cert=None, proxies=None
+    ):
         """Sends PreparedRequest object. Returns Response object.
 
         :param request: The :class:`PreparedRequest <PreparedRequest>` being sent.
@@ -410,94 +607,55 @@ class HTTPAdapter(BaseAdapter):
         """
 
         try:
-            conn = self.get_connection(request.url, proxies)
+            conn = self.get_connection_with_tls_context(
+                request, verify, proxies=proxies, cert=cert
+            )
         except LocationValueError as e:
             raise InvalidURL(e, request=request)
 
         self.cert_verify(conn, request.url, verify, cert)
         url = self.request_url(request, proxies)
-        self.add_headers(request, stream=stream, timeout=timeout, verify=verify, cert=cert, proxies=proxies)
+        self.add_headers(
+            request,
+            stream=stream,
+            timeout=timeout,
+            verify=verify,
+            cert=cert,
+            proxies=proxies,
+        )
 
-        chunked = not (request.body is None or 'Content-Length' in request.headers)
+        chunked = not (request.body is None or "Content-Length" in request.headers)
 
         if isinstance(timeout, tuple):
             try:
                 connect, read = timeout
                 timeout = TimeoutSauce(connect=connect, read=read)
-            except ValueError as e:
-                # this may raise a string formatting error.
-                err = ("Invalid timeout {}. Pass a (connect, read) "
-                       "timeout tuple, or a single float to set "
-                       "both timeouts to the same value".format(timeout))
-                raise ValueError(err)
+            except ValueError:
+                raise ValueError(
+                    f"Invalid timeout {timeout}. Pass a (connect, read) timeout tuple, "
+                    f"or a single float to set both timeouts to the same value."
+                )
         elif isinstance(timeout, TimeoutSauce):
             pass
         else:
             timeout = TimeoutSauce(connect=timeout, read=timeout)
 
         try:
-            if not chunked:
-                resp = conn.urlopen(
-                    method=request.method,
-                    url=url,
-                    body=request.body,
-                    headers=request.headers,
-                    redirect=False,
-                    assert_same_host=False,
-                    preload_content=False,
-                    decode_content=False,
-                    retries=self.max_retries,
-                    timeout=timeout
-                )
+            resp = conn.urlopen(
+                method=request.method,
+                url=url,
+                body=request.body,
+                headers=request.headers,
+                redirect=False,
+                assert_same_host=False,
+                preload_content=False,
+                decode_content=False,
+                retries=self.max_retries,
+                timeout=timeout,
+                chunked=chunked,
+            )
 
-            # Send the request.
-            else:
-                if hasattr(conn, 'proxy_pool'):
-                    conn = conn.proxy_pool
-
-                low_conn = conn._get_conn(timeout=DEFAULT_POOL_TIMEOUT)
-
-                try:
-                    skip_host = 'Host' in request.headers
-                    low_conn.putrequest(request.method,
-                                        url,
-                                        skip_accept_encoding=True,
-                                        skip_host=skip_host)
-
-                    for header, value in request.headers.items():
-                        low_conn.putheader(header, value)
-
-                    low_conn.endheaders()
-
-                    for i in request.body:
-                        low_conn.send(hex(len(i))[2:].encode('utf-8'))
-                        low_conn.send(b'\r\n')
-                        low_conn.send(i)
-                        low_conn.send(b'\r\n')
-                    low_conn.send(b'0\r\n\r\n')
-
-                    # Receive the response from the server
-                    try:
-                        # For Python 2.7, use buffering of HTTP responses
-                        r = low_conn.getresponse(buffering=True)
-                    except TypeError:
-                        # For compatibility with Python 3.3+
-                        r = low_conn.getresponse()
-
-                    resp = HTTPResponse.from_httplib(
-                        r,
-                        pool=conn,
-                        connection=low_conn,
-                        preload_content=False,
-                        decode_content=False
-                    )
-                except:
-                    # If we hit any problems here, clean up the connection.
-                    # Then, reraise so that we can handle the actual exception.
-                    low_conn.close()
-                    raise
-
-        except (ProtocolError, socket.error) as err:
+        except (ProtocolError, OSError) as err:
             raise ConnectionError(err, request=request)
 
         except MaxRetryError as e:

src/requests/api.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.api
 ~~~~~~~~~~~~
@@ -27,7 +25,7 @@ def request(method, url, **kwargs):
     :param cookies: (optional) Dict or CookieJar object to send with the :class:`Request`.
     :param files: (optional) Dictionary of ``'name': file-like-objects`` (or ``{'name': file-tuple}``) for multipart encoding upload.
         ``file-tuple`` can be a 2-tuple ``('filename', fileobj)``, 3-tuple ``('filename', fileobj, 'content_type')``
-        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content-type'`` is a string
+        or a 4-tuple ``('filename', fileobj, 'content_type', custom_headers)``, where ``'content_type'`` is a string
         defining the content type of the given file and ``custom_headers`` a dict-like object containing additional headers
         to add for the file.
     :param auth: (optional) Auth tuple to enable Basic/Digest/Custom HTTP Auth.
@@ -72,7 +70,7 @@ def get(url, params=None, **kwargs):
     :rtype: requests.Response
     """
 
-    return request('get', url, params=params, **kwargs)
+    return request("get", url, params=params, **kwargs)
 
 
 def options(url, **kwargs):
@@ -84,7 +82,7 @@ def options(url, **kwargs):
     :rtype: requests.Response
     """
 
-    return request('options', url, **kwargs)
+    return request("options", url, **kwargs)
 
 
 def head(url, **kwargs):
@@ -98,8 +96,8 @@ def head(url, **kwargs):
     :rtype: requests.Response
     """
 
-    kwargs.setdefault('allow_redirects', False)
-    return request('head', url, **kwargs)
+    kwargs.setdefault("allow_redirects", False)
+    return request("head", url, **kwargs)
 
 
 def post(url, data=None, json=None, **kwargs):
@@ -108,13 +106,13 @@ def post(url, data=None, json=None, **kwargs):
     :param url: URL for the new :class:`Request` object.
     :param data: (optional) Dictionary, list of tuples, bytes, or file-like
         object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
     :rtype: requests.Response
     """
 
-    return request('post', url, data=data, json=json, **kwargs)
+    return request("post", url, data=data, json=json, **kwargs)
 
 
 def put(url, data=None, **kwargs):
@@ -123,13 +121,13 @@ def put(url, data=None, **kwargs):
     :param url: URL for the new :class:`Request` object.
     :param data: (optional) Dictionary, list of tuples, bytes, or file-like
         object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
     :rtype: requests.Response
     """
 
-    return request('put', url, data=data, **kwargs)
+    return request("put", url, data=data, **kwargs)
 
 
 def patch(url, data=None, **kwargs):
@@ -138,13 +136,13 @@ def patch(url, data=None, **kwargs):
     :param url: URL for the new :class:`Request` object.
     :param data: (optional) Dictionary, list of tuples, bytes, or file-like
         object to send in the body of the :class:`Request`.
-    :param json: (optional) json data to send in the body of the :class:`Request`.
+    :param json: (optional) A JSON serializable Python object to send in the body of the :class:`Request`.
     :param \*\*kwargs: Optional arguments that ``request`` takes.
     :return: :class:`Response <Response>` object
     :rtype: requests.Response
     """
 
-    return request('patch', url, data=data, **kwargs)
+    return request("patch", url, data=data, **kwargs)
 
 
 def delete(url, **kwargs):
@@ -156,4 +154,4 @@ def delete(url, **kwargs):
     :rtype: requests.Response
     """
 
-    return request('delete', url, **kwargs)
+    return request("delete", url, **kwargs)

src/requests/auth.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.auth
 ~~~~~~~~~~~~~
@@ -7,22 +5,21 @@ requests.auth
 This module contains the authentication handlers for Requests.
 """
 
+import hashlib
 import os
 import re
-import time
-import hashlib
 import threading
+import time
 import warnings
-
 from base64 import b64encode
 
-from .compat import urlparse, str, basestring
-from .cookies import extract_cookies_to_jar
 from ._internal_utils import to_native_string
+from .compat import basestring, str, urlparse
+from .cookies import extract_cookies_to_jar
 from .utils import parse_dict_header
 
-CONTENT_TYPE_FORM_URLENCODED = 'application/x-www-form-urlencoded'
-CONTENT_TYPE_MULTI_PART = 'multipart/form-data'
+CONTENT_TYPE_FORM_URLENCODED = "application/x-www-form-urlencoded"
+CONTENT_TYPE_MULTI_PART = "multipart/form-data"
 
 
 def _basic_auth_str(username, password):
@@ -57,23 +54,23 @@ def _basic_auth_str(username, password):
     # -- End Removal --
 
     if isinstance(username, str):
-        username = username.encode('latin1')
+        username = username.encode("latin1")
 
     if isinstance(password, str):
-        password = password.encode('latin1')
+        password = password.encode("latin1")
 
-    authstr = 'Basic ' + to_native_string(
-        b64encode(b':'.join((username, password))).strip()
+    authstr = "Basic " + to_native_string(
+        b64encode(b":".join((username, password))).strip()
     )
 
     return authstr
 
 
-class AuthBase(object):
+class AuthBase:
     """Base class that all auth implementations derive from"""
 
     def __call__(self, r):
-        raise NotImplementedError('Auth hooks must be callable.')
+        raise NotImplementedError("Auth hooks must be callable.")
 
 
 class HTTPBasicAuth(AuthBase):
@@ -84,16 +81,18 @@ class HTTPBasicAuth(AuthBase):
         self.password = password
 
     def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
+        return all(
+            [
+                self.username == getattr(other, "username", None),
+                self.password == getattr(other, "password", None),
+            ]
+        )
 
     def __ne__(self, other):
         return not self == other
 
     def __call__(self, r):
-        r.headers['Authorization'] = _basic_auth_str(self.username, self.password)
+        r.headers["Authorization"] = _basic_auth_str(self.username, self.password)
         return r
 
 
@@ -101,7 +100,7 @@ class HTTPProxyAuth(HTTPBasicAuth):
     """Attaches HTTP Proxy Authentication to a given Request object."""
 
     def __call__(self, r):
-        r.headers['Proxy-Authorization'] = _basic_auth_str(self.username, self.password)
+        r.headers["Proxy-Authorization"] = _basic_auth_str(self.username, self.password)
         return r
 
 
@@ -116,9 +115,9 @@ class HTTPDigestAuth(AuthBase):
 
     def init_per_thread_state(self):
         # Ensure state is initialized just once per-thread
-        if not hasattr(self._thread_local, 'init'):
+        if not hasattr(self._thread_local, "init"):
             self._thread_local.init = True
-            self._thread_local.last_nonce = ''
+            self._thread_local.last_nonce = ""
             self._thread_local.nonce_count = 0
             self._thread_local.chal = {}
             self._thread_local.pos = None
@@ -129,44 +128,52 @@ class HTTPDigestAuth(AuthBase):
         :rtype: str
         """
 
-        realm = self._thread_local.chal['realm']
-        nonce = self._thread_local.chal['nonce']
-        qop = self._thread_local.chal.get('qop')
-        algorithm = self._thread_local.chal.get('algorithm')
-        opaque = self._thread_local.chal.get('opaque')
+        realm = self._thread_local.chal["realm"]
+        nonce = self._thread_local.chal["nonce"]
+        qop = self._thread_local.chal.get("qop")
+        algorithm = self._thread_local.chal.get("algorithm")
+        opaque = self._thread_local.chal.get("opaque")
         hash_utf8 = None
 
         if algorithm is None:
-            _algorithm = 'MD5'
+            _algorithm = "MD5"
         else:
             _algorithm = algorithm.upper()
         # lambdas assume digest modules are imported at the top level
-        if _algorithm == 'MD5' or _algorithm == 'MD5-SESS':
+        if _algorithm == "MD5" or _algorithm == "MD5-SESS":
+
             def md5_utf8(x):
                 if isinstance(x, str):
-                    x = x.encode('utf-8')
+                    x = x.encode("utf-8")
                 return hashlib.md5(x).hexdigest()
+
             hash_utf8 = md5_utf8
-        elif _algorithm == 'SHA':
+        elif _algorithm == "SHA":
+
             def sha_utf8(x):
                 if isinstance(x, str):
-                    x = x.encode('utf-8')
+                    x = x.encode("utf-8")
                 return hashlib.sha1(x).hexdigest()
+
             hash_utf8 = sha_utf8
-        elif _algorithm == 'SHA-256':
+        elif _algorithm == "SHA-256":
+
             def sha256_utf8(x):
                 if isinstance(x, str):
-                    x = x.encode('utf-8')
+                    x = x.encode("utf-8")
                 return hashlib.sha256(x).hexdigest()
+
             hash_utf8 = sha256_utf8
-        elif _algorithm == 'SHA-512':
+        elif _algorithm == "SHA-512":
+
             def sha512_utf8(x):
                 if isinstance(x, str):
-                    x = x.encode('utf-8')
+                    x = x.encode("utf-8")
                 return hashlib.sha512(x).hexdigest()
+
             hash_utf8 = sha512_utf8
 
-        KD = lambda s, d: hash_utf8("%s:%s" % (s, d))
+        KD = lambda s, d: hash_utf8(f"{s}:{d}")  # noqa:E731
 
         if hash_utf8 is None:
             return None
@@ -177,10 +184,10 @@ class HTTPDigestAuth(AuthBase):
         #: path is request-uri defined in RFC 2616 which should not be empty
         path = p_parsed.path or "/"
         if p_parsed.query:
-            path += '?' + p_parsed.query
+            path += f"?{p_parsed.query}"
 
-        A1 = '%s:%s:%s' % (self.username, realm, self.password)
-        A2 = '%s:%s' % (method, path)
+        A1 = f"{self.username}:{realm}:{self.password}"
+        A2 = f"{method}:{path}"
 
         HA1 = hash_utf8(A1)
         HA2 = hash_utf8(A2)
@@ -189,22 +196,20 @@ class HTTPDigestAuth(AuthBase):
             self._thread_local.nonce_count += 1
         else:
             self._thread_local.nonce_count = 1
-        ncvalue = '%08x' % self._thread_local.nonce_count
-        s = str(self._thread_local.nonce_count).encode('utf-8')
-        s += nonce.encode('utf-8')
-        s += time.ctime().encode('utf-8')
+        ncvalue = f"{self._thread_local.nonce_count:08x}"
+        s = str(self._thread_local.nonce_count).encode("utf-8")
+        s += nonce.encode("utf-8")
+        s += time.ctime().encode("utf-8")
         s += os.urandom(8)
 
-        cnonce = (hashlib.sha1(s).hexdigest()[:16])
-        if _algorithm == 'MD5-SESS':
-            HA1 = hash_utf8('%s:%s:%s' % (HA1, nonce, cnonce))
+        cnonce = hashlib.sha1(s).hexdigest()[:16]
+        if _algorithm == "MD5-SESS":
+            HA1 = hash_utf8(f"{HA1}:{nonce}:{cnonce}")
 
         if not qop:
-            respdig = KD(HA1, "%s:%s" % (nonce, HA2))
-        elif qop == 'auth' or 'auth' in qop.split(','):
-            noncebit = "%s:%s:%s:%s:%s" % (
-                nonce, ncvalue, cnonce, 'auth', HA2
-            )
+            respdig = KD(HA1, f"{nonce}:{HA2}")
+        elif qop == "auth" or "auth" in qop.split(","):
+            noncebit = f"{nonce}:{ncvalue}:{cnonce}:auth:{HA2}"
             respdig = KD(HA1, noncebit)
         else:
             # XXX handle auth-int.
@@ -213,18 +218,20 @@ class HTTPDigestAuth(AuthBase):
         self._thread_local.last_nonce = nonce
 
         # XXX should the partial digests be encoded too?
-        base = 'username="%s", realm="%s", nonce="%s", uri="%s", ' \
-               'response="%s"' % (self.username, realm, nonce, path, respdig)
+        base = (
+            f'username="{self.username}", realm="{realm}", nonce="{nonce}", '
+            f'uri="{path}", response="{respdig}"'
+        )
         if opaque:
-            base += ', opaque="%s"' % opaque
+            base += f', opaque="{opaque}"'
         if algorithm:
-            base += ', algorithm="%s"' % algorithm
+            base += f', algorithm="{algorithm}"'
         if entdig:
-            base += ', digest="%s"' % entdig
+            base += f', digest="{entdig}"'
         if qop:
-            base += ', qop="auth", nc=%s, cnonce="%s"' % (ncvalue, cnonce)
+            base += f', qop="auth", nc={ncvalue}, cnonce="{cnonce}"'
 
-        return 'Digest %s' % (base)
+        return f"Digest {base}"
 
     def handle_redirect(self, r, **kwargs):
         """Reset num_401_calls counter on redirects."""
@@ -248,13 +255,12 @@ class HTTPDigestAuth(AuthBase):
             # Rewind the file position indicator of the body to where
             # it was to resend the request.
             r.request.body.seek(self._thread_local.pos)
-        s_auth = r.headers.get('www-authenticate', '')
-
-        if 'digest' in s_auth.lower() and self._thread_local.num_401_calls < 2:
+        s_auth = r.headers.get("www-authenticate", "")
 
+        if "digest" in s_auth.lower() and self._thread_local.num_401_calls < 2:
             self._thread_local.num_401_calls += 1
-            pat = re.compile(r'digest ', flags=re.IGNORECASE)
-            self._thread_local.chal = parse_dict_header(pat.sub('', s_auth, count=1))
+            pat = re.compile(r"digest ", flags=re.IGNORECASE)
+            self._thread_local.chal = parse_dict_header(pat.sub("", s_auth, count=1))
 
             # Consume content and release the original connection
             # to allow our new request to reuse the same one.
@@ -264,8 +270,9 @@ class HTTPDigestAuth(AuthBase):
             extract_cookies_to_jar(prep._cookies, r.request, r.raw)
             prep.prepare_cookies(prep._cookies)
 
-            prep.headers['Authorization'] = self.build_digest_header(
-                prep.method, prep.url)
+            prep.headers["Authorization"] = self.build_digest_header(
+                prep.method, prep.url
+            )
             _r = r.connection.send(prep, **kwargs)
             _r.history.append(r)
             _r.request = prep
@@ -280,7 +287,7 @@ class HTTPDigestAuth(AuthBase):
         self.init_per_thread_state()
         # If we have a saved nonce, skip the 401
         if self._thread_local.last_nonce:
-            r.headers['Authorization'] = self.build_digest_header(r.method, r.url)
+            r.headers["Authorization"] = self.build_digest_header(r.method, r.url)
         try:
             self._thread_local.pos = r.body.tell()
         except AttributeError:
@@ -289,17 +296,19 @@ class HTTPDigestAuth(AuthBase):
             # file position of the previous body. Ensure it's set to
             # None.
             self._thread_local.pos = None
-        r.register_hook('response', self.handle_401)
-        r.register_hook('response', self.handle_redirect)
+        r.register_hook("response", self.handle_401)
+        r.register_hook("response", self.handle_redirect)
         self._thread_local.num_401_calls = 1
 
         return r
 
     def __eq__(self, other):
-        return all([
-            self.username == getattr(other, 'username', None),
-            self.password == getattr(other, 'password', None)
-        ])
+        return all(
+            [
+                self.username == getattr(other, "username", None),
+                self.password == getattr(other, "password", None),
+            ]
+        )
 
     def __ne__(self, other):
         return not self == other

src/requests/certs.py

@@ -1,5 +1,4 @@
 #!/usr/bin/env python
-# -*- coding: utf-8 -*-
 
 """
 requests.certs
@@ -14,5 +13,5 @@ packaged CA bundle.
 """
 from certifi import where
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     print(where())

src/requests/compat.py

@@ -0,0 +1,106 @@
+"""
+requests.compat
+~~~~~~~~~~~~~~~
+
+This module previously handled import compatibility issues
+between Python 2 and Python 3. It remains for backwards
+compatibility until the next major version.
+"""
+
+import importlib
+import sys
+
+# -------
+# urllib3
+# -------
+from urllib3 import __version__ as urllib3_version
+
+# Detect which major version of urllib3 is being used.
+try:
+    is_urllib3_1 = int(urllib3_version.split(".")[0]) == 1
+except (TypeError, AttributeError):
+    # If we can't discern a version, prefer old functionality.
+    is_urllib3_1 = True
+
+# -------------------
+# Character Detection
+# -------------------
+
+
+def _resolve_char_detection():
+    """Find supported character detection libraries."""
+    chardet = None
+    for lib in ("chardet", "charset_normalizer"):
+        if chardet is None:
+            try:
+                chardet = importlib.import_module(lib)
+            except ImportError:
+                pass
+    return chardet
+
+
+chardet = _resolve_char_detection()
+
+# -------
+# Pythons
+# -------
+
+# Syntax sugar.
+_ver = sys.version_info
+
+#: Python 2.x?
+is_py2 = _ver[0] == 2
+
+#: Python 3.x?
+is_py3 = _ver[0] == 3
+
+# json/simplejson module import resolution
+has_simplejson = False
+try:
+    import simplejson as json
+
+    has_simplejson = True
+except ImportError:
+    import json
+
+if has_simplejson:
+    from simplejson import JSONDecodeError
+else:
+    from json import JSONDecodeError
+
+# Keep OrderedDict for backwards compatibility.
+from collections import OrderedDict
+from collections.abc import Callable, Mapping, MutableMapping
+from http import cookiejar as cookielib
+from http.cookies import Morsel
+from io import StringIO
+
+# --------------
+# Legacy Imports
+# --------------
+from urllib.parse import (
+    quote,
+    quote_plus,
+    unquote,
+    unquote_plus,
+    urldefrag,
+    urlencode,
+    urljoin,
+    urlparse,
+    urlsplit,
+    urlunparse,
+)
+from urllib.request import (
+    getproxies,
+    getproxies_environment,
+    parse_http_list,
+    proxy_bypass,
+    proxy_bypass_environment,
+)
+
+builtin_str = str
+str = str
+bytes = bytes
+basestring = (str, bytes)
+numeric_types = (int, float)
+integer_types = (int,)

src/requests/cookies.py

@@ -1,20 +1,18 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.cookies
 ~~~~~~~~~~~~~~~~
 
-Compatibility code to be able to use `cookielib.CookieJar` with requests.
+Compatibility code to be able to use `http.cookiejar.CookieJar` with requests.
 
 requests.utils imports from here, so be careful with imports.
 """
 
+import calendar
 import copy
 import time
-import calendar
 
 from ._internal_utils import to_native_string
-from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping
+from .compat import Morsel, MutableMapping, cookielib, urlparse, urlunparse
 
 try:
     import threading
@@ -22,10 +20,10 @@ except ImportError:
     import dummy_threading as threading
 
 
-class MockRequest(object):
+class MockRequest:
     """Wraps a `requests.Request` to mimic a `urllib2.Request`.
 
-    The code in `cookielib.CookieJar` expects this interface in order to correctly
+    The code in `http.cookiejar.CookieJar` expects this interface in order to correctly
     manage cookie policies, i.e., determine whether a cookie can be set, given the
     domains of the request and the cookie.
 
@@ -51,16 +49,22 @@ class MockRequest(object):
     def get_full_url(self):
         # Only return the response's URL if the user hadn't set the Host
         # header
-        if not self._r.headers.get('Host'):
+        if not self._r.headers.get("Host"):
             return self._r.url
         # If they did set it, retrieve it and reconstruct the expected domain
-        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
+        host = to_native_string(self._r.headers["Host"], encoding="utf-8")
         parsed = urlparse(self._r.url)
         # Reconstruct the URL as we expect it
-        return urlunparse([
-            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
-            parsed.fragment
-        ])
+        return urlunparse(
+            [
+                parsed.scheme,
+                host,
+                parsed.path,
+                parsed.params,
+                parsed.query,
+                parsed.fragment,
+            ]
+        )
 
     def is_unverifiable(self):
         return True
@@ -72,8 +76,10 @@ class MockRequest(object):
         return self._r.headers.get(name, self._new_headers.get(name, default))
 
     def add_header(self, key, val):
-        """cookielib has no legitimate use for this method; add it back if you find one."""
-        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
+        """cookiejar has no legitimate use for this method; add it back if you find one."""
+        raise NotImplementedError(
+            "Cookie headers should be added with add_unredirected_header()"
+        )
 
     def add_unredirected_header(self, name, value):
         self._new_headers[name] = value
@@ -94,15 +100,15 @@ class MockRequest(object):
         return self.get_host()
 
 
-class MockResponse(object):
+class MockResponse:
     """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
 
     ...what? Basically, expose the parsed HTTP headers from the server response
-    the way `cookielib` expects to see them.
+    the way `http.cookiejar` expects to see them.
     """
 
     def __init__(self, headers):
-        """Make a MockResponse for `cookielib` to read.
+        """Make a MockResponse for `cookiejar` to read.
 
         :param headers: a httplib.HTTPMessage or analogous carrying the headers
         """
@@ -118,12 +124,11 @@ class MockResponse(object):
 def extract_cookies_to_jar(jar, request, response):
     """Extract the cookies from the response into a CookieJar.
 
-    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
+    :param jar: http.cookiejar.CookieJar (not necessarily a RequestsCookieJar)
     :param request: our own requests.Request object
     :param response: urllib3.HTTPResponse object
     """
-    if not (hasattr(response, '_original_response') and
-            response._original_response):
+    if not (hasattr(response, "_original_response") and response._original_response):
         return
     # the _original_response field is the wrapped httplib.HTTPResponse object,
     req = MockRequest(request)
@@ -140,7 +145,7 @@ def get_cookie_header(jar, request):
     """
     r = MockRequest(request)
     jar.add_cookie_header(r)
-    return r.get_new_headers().get('Cookie')
+    return r.get_new_headers().get("Cookie")
 
 
 def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
@@ -169,7 +174,7 @@ class CookieConflictError(RuntimeError):
 
 
 class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
-    """Compatibility class; is a cookielib.CookieJar, but exposes a dict
+    """Compatibility class; is a http.cookiejar.CookieJar, but exposes a dict
     interface.
 
     This is the CookieJar we create by default for requests and sessions that
@@ -205,7 +210,9 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
         """
         # support client code that unsets cookies by assignment of a None value:
         if value is None:
-            remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
+            remove_cookie_by_name(
+                self, name, domain=kwargs.get("domain"), path=kwargs.get("path")
+            )
             return
 
         if isinstance(value, Morsel):
@@ -305,16 +312,15 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
         """
         dictionary = {}
         for cookie in iter(self):
-            if (
-                (domain is None or cookie.domain == domain) and
-                (path is None or cookie.path == path)
+            if (domain is None or cookie.domain == domain) and (
+                path is None or cookie.path == path
             ):
                 dictionary[cookie.name] = cookie.value
         return dictionary
 
     def __contains__(self, name):
         try:
-            return super(RequestsCookieJar, self).__contains__(name)
+            return super().__contains__(name)
         except CookieConflictError:
             return True
 
@@ -335,15 +341,19 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
         self.set(name, value)
 
     def __delitem__(self, name):
-        """Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
+        """Deletes a cookie given a name. Wraps ``http.cookiejar.CookieJar``'s
         ``remove_cookie_by_name()``.
         """
         remove_cookie_by_name(self, name)
 
     def set_cookie(self, cookie, *args, **kwargs):
-        if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
-            cookie.value = cookie.value.replace('\\"', '')
-        return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
+        if (
+            hasattr(cookie.value, "startswith")
+            and cookie.value.startswith('"')
+            and cookie.value.endswith('"')
+        ):
+            cookie.value = cookie.value.replace('\\"', "")
+        return super().set_cookie(cookie, *args, **kwargs)
 
     def update(self, other):
         """Updates this jar with cookies from another CookieJar or dict-like"""
@@ -351,7 +361,7 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
             for cookie in other:
                 self.set_cookie(copy.copy(cookie))
         else:
-            super(RequestsCookieJar, self).update(other)
+            super().update(other)
 
     def _find(self, name, domain=None, path=None):
         """Requests uses this method internally to get cookie values.
@@ -371,7 +381,7 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
                     if path is None or cookie.path == path:
                         return cookie.value
 
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+        raise KeyError(f"name={name!r}, domain={domain!r}, path={path!r}")
 
     def _find_no_duplicates(self, name, domain=None, path=None):
         """Both ``__get_item__`` and ``get`` call this function: it's never
@@ -390,25 +400,29 @@ class RequestsCookieJar(cookielib.CookieJar, MutableMapping):
             if cookie.name == name:
                 if domain is None or cookie.domain == domain:
                     if path is None or cookie.path == path:
-                        if toReturn is not None:  # if there are multiple cookies that meet passed in criteria
-                            raise CookieConflictError('There are multiple cookies with name, %r' % (name))
-                        toReturn = cookie.value  # we will eventually return this as long as no cookie conflict
+                        if toReturn is not None:
+                            # if there are multiple cookies that meet passed in criteria
+                            raise CookieConflictError(
+                                f"There are multiple cookies with name, {name!r}"
+                            )
+                        # we will eventually return this as long as no cookie conflict
+                        toReturn = cookie.value
 
         if toReturn:
             return toReturn
-        raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
+        raise KeyError(f"name={name!r}, domain={domain!r}, path={path!r}")
 
     def __getstate__(self):
         """Unlike a normal CookieJar, this class is pickleable."""
         state = self.__dict__.copy()
         # remove the unpickleable RLock object
-        state.pop('_cookies_lock')
+        state.pop("_cookies_lock")
         return state
 
     def __setstate__(self, state):
         """Unlike a normal CookieJar, this class is pickleable."""
         self.__dict__.update(state)
-        if '_cookies_lock' not in self.__dict__:
+        if "_cookies_lock" not in self.__dict__:
             self._cookies_lock = threading.RLock()
 
     def copy(self):
@@ -427,7 +441,7 @@ def _copy_cookie_jar(jar):
     if jar is None:
         return None
 
-    if hasattr(jar, 'copy'):
+    if hasattr(jar, "copy"):
         # We're dealing with an instance of RequestsCookieJar
         return jar.copy()
     # We're dealing with a generic CookieJar instance
@@ -445,31 +459,32 @@ def create_cookie(name, value, **kwargs):
     and sent on every request (this is sometimes called a "supercookie").
     """
     result = {
-        'version': 0,
-        'name': name,
-        'value': value,
-        'port': None,
-        'domain': '',
-        'path': '/',
-        'secure': False,
-        'expires': None,
-        'discard': True,
-        'comment': None,
-        'comment_url': None,
-        'rest': {'HttpOnly': None},
-        'rfc2109': False,
+        "version": 0,
+        "name": name,
+        "value": value,
+        "port": None,
+        "domain": "",
+        "path": "/",
+        "secure": False,
+        "expires": None,
+        "discard": True,
+        "comment": None,
+        "comment_url": None,
+        "rest": {"HttpOnly": None},
+        "rfc2109": False,
     }
 
     badargs = set(kwargs) - set(result)
     if badargs:
-        err = 'create_cookie() got unexpected keyword arguments: %s'
-        raise TypeError(err % list(badargs))
+        raise TypeError(
+            f"create_cookie() got unexpected keyword arguments: {list(badargs)}"
+        )
 
     result.update(kwargs)
-    result['port_specified'] = bool(result['port'])
-    result['domain_specified'] = bool(result['domain'])
-    result['domain_initial_dot'] = result['domain'].startswith('.')
-    result['path_specified'] = bool(result['path'])
+    result["port_specified"] = bool(result["port"])
+    result["domain_specified"] = bool(result["domain"])
+    result["domain_initial_dot"] = result["domain"].startswith(".")
+    result["path_specified"] = bool(result["path"])
 
     return cookielib.Cookie(**result)
 
@@ -478,30 +493,28 @@ def morsel_to_cookie(morsel):
     """Convert a Morsel object into a Cookie containing the one k/v pair."""
 
     expires = None
-    if morsel['max-age']:
+    if morsel["max-age"]:
         try:
-            expires = int(time.time() + int(morsel['max-age']))
+            expires = int(time.time() + int(morsel["max-age"]))
         except ValueError:
-            raise TypeError('max-age: %s must be integer' % morsel['max-age'])
-    elif morsel['expires']:
-        time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
-        expires = calendar.timegm(
-            time.strptime(morsel['expires'], time_template)
-        )
+            raise TypeError(f"max-age: {morsel['max-age']} must be integer")
+    elif morsel["expires"]:
+        time_template = "%a, %d-%b-%Y %H:%M:%S GMT"
+        expires = calendar.timegm(time.strptime(morsel["expires"], time_template))
     return create_cookie(
-        comment=morsel['comment'],
-        comment_url=bool(morsel['comment']),
+        comment=morsel["comment"],
+        comment_url=bool(morsel["comment"]),
         discard=False,
-        domain=morsel['domain'],
+        domain=morsel["domain"],
         expires=expires,
         name=morsel.key,
-        path=morsel['path'],
+        path=morsel["path"],
         port=None,
-        rest={'HttpOnly': morsel['httponly']},
+        rest={"HttpOnly": morsel["httponly"]},
         rfc2109=False,
-        secure=bool(morsel['secure']),
+        secure=bool(morsel["secure"]),
         value=morsel.value,
-        version=morsel['version'] or 0,
+        version=morsel["version"] or 0,
     )
 
 
@@ -534,11 +547,10 @@ def merge_cookies(cookiejar, cookies):
     :rtype: CookieJar
     """
     if not isinstance(cookiejar, cookielib.CookieJar):
-        raise ValueError('You can only merge into CookieJar')
+        raise ValueError("You can only merge into CookieJar")
 
     if isinstance(cookies, dict):
-        cookiejar = cookiejar_from_dict(
-            cookies, cookiejar=cookiejar, overwrite=False)
+        cookiejar = cookiejar_from_dict(cookies, cookiejar=cookiejar, overwrite=False)
     elif isinstance(cookies, cookielib.CookieJar):
         try:
             cookiejar.update(cookies)

src/requests/exceptions.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.exceptions
 ~~~~~~~~~~~~~~~~~~~
@@ -18,13 +16,12 @@ class RequestException(IOError):
 
     def __init__(self, *args, **kwargs):
         """Initialize RequestException with `request` and `response` objects."""
-        response = kwargs.pop('response', None)
+        response = kwargs.pop("response", None)
         self.response = response
-        self.request = kwargs.pop('request', None)
-        if (response is not None and not self.request and
-                hasattr(response, 'request')):
+        self.request = kwargs.pop("request", None)
+        if response is not None and not self.request and hasattr(response, "request"):
             self.request = self.response.request
-        super(RequestException, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
 
 class InvalidJSONError(RequestException):
@@ -34,6 +31,26 @@ class InvalidJSONError(RequestException):
 class JSONDecodeError(InvalidJSONError, CompatJSONDecodeError):
     """Couldn't decode the text into json"""
 
+    def __init__(self, *args, **kwargs):
+        """
+        Construct the JSONDecodeError instance first with all
+        args. Then use it's args to construct the IOError so that
+        the json specific args aren't used as IOError specific args
+        and the error message from JSONDecodeError is preserved.
+        """
+        CompatJSONDecodeError.__init__(self, *args)
+        InvalidJSONError.__init__(self, *self.args, **kwargs)
+
+    def __reduce__(self):
+        """
+        The __reduce__ method called when pickling the object must
+        be the one from the JSONDecodeError (be it json/simplejson)
+        as it expects all the arguments for instantiation, not just
+        one like the IOError, and the MRO would by default call the
+        __reduce__ method from the IOError due to the inheritance order.
+        """
+        return CompatJSONDecodeError.__reduce__(self)
+
 
 class HTTPError(RequestException):
     """An HTTP error occurred."""
@@ -118,6 +135,7 @@ class RetryError(RequestException):
 class UnrewindableBodyError(RequestException):
     """Requests encountered an error when trying to rewind a body."""
 
+
 # Warnings
 
 

src/requests/help.py

@@ -0,0 +1,134 @@
+"""Module containing bug report helper(s)."""
+
+import json
+import platform
+import ssl
+import sys
+
+import idna
+import urllib3
+
+from . import __version__ as requests_version
+
+try:
+    import charset_normalizer
+except ImportError:
+    charset_normalizer = None
+
+try:
+    import chardet
+except ImportError:
+    chardet = None
+
+try:
+    from urllib3.contrib import pyopenssl
+except ImportError:
+    pyopenssl = None
+    OpenSSL = None
+    cryptography = None
+else:
+    import cryptography
+    import OpenSSL
+
+
+def _implementation():
+    """Return a dict with the Python implementation and version.
+
+    Provide both the name and the version of the Python implementation
+    currently running. For example, on CPython 3.10.3 it will return
+    {'name': 'CPython', 'version': '3.10.3'}.
+
+    This function works best on CPython and PyPy: in particular, it probably
+    doesn't work for Jython or IronPython. Future investigation should be done
+    to work out the correct shape of the code for those platforms.
+    """
+    implementation = platform.python_implementation()
+
+    if implementation == "CPython":
+        implementation_version = platform.python_version()
+    elif implementation == "PyPy":
+        implementation_version = "{}.{}.{}".format(
+            sys.pypy_version_info.major,
+            sys.pypy_version_info.minor,
+            sys.pypy_version_info.micro,
+        )
+        if sys.pypy_version_info.releaselevel != "final":
+            implementation_version = "".join(
+                [implementation_version, sys.pypy_version_info.releaselevel]
+            )
+    elif implementation == "Jython":
+        implementation_version = platform.python_version()  # Complete Guess
+    elif implementation == "IronPython":
+        implementation_version = platform.python_version()  # Complete Guess
+    else:
+        implementation_version = "Unknown"
+
+    return {"name": implementation, "version": implementation_version}
+
+
+def info():
+    """Generate information for a bug report."""
+    try:
+        platform_info = {
+            "system": platform.system(),
+            "release": platform.release(),
+        }
+    except OSError:
+        platform_info = {
+            "system": "Unknown",
+            "release": "Unknown",
+        }
+
+    implementation_info = _implementation()
+    urllib3_info = {"version": urllib3.__version__}
+    charset_normalizer_info = {"version": None}
+    chardet_info = {"version": None}
+    if charset_normalizer:
+        charset_normalizer_info = {"version": charset_normalizer.__version__}
+    if chardet:
+        chardet_info = {"version": chardet.__version__}
+
+    pyopenssl_info = {
+        "version": None,
+        "openssl_version": "",
+    }
+    if OpenSSL:
+        pyopenssl_info = {
+            "version": OpenSSL.__version__,
+            "openssl_version": f"{OpenSSL.SSL.OPENSSL_VERSION_NUMBER:x}",
+        }
+    cryptography_info = {
+        "version": getattr(cryptography, "__version__", ""),
+    }
+    idna_info = {
+        "version": getattr(idna, "__version__", ""),
+    }
+
+    system_ssl = ssl.OPENSSL_VERSION_NUMBER
+    system_ssl_info = {"version": f"{system_ssl:x}" if system_ssl is not None else ""}
+
+    return {
+        "platform": platform_info,
+        "implementation": implementation_info,
+        "system_ssl": system_ssl_info,
+        "using_pyopenssl": pyopenssl is not None,
+        "using_charset_normalizer": chardet is None,
+        "pyOpenSSL": pyopenssl_info,
+        "urllib3": urllib3_info,
+        "chardet": chardet_info,
+        "charset_normalizer": charset_normalizer_info,
+        "cryptography": cryptography_info,
+        "idna": idna_info,
+        "requests": {
+            "version": requests_version,
+        },
+    }
+
+
+def main():
+    """Pretty-print the bug information as JSON."""
+    print(json.dumps(info(), sort_keys=True, indent=2))
+
+
+if __name__ == "__main__":
+    main()

src/requests/hooks.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.hooks
 ~~~~~~~~~~~~~~
@@ -11,12 +9,13 @@ Available hooks:
 ``response``:
     The response generated from a Request.
 """
-HOOKS = ['response']
+HOOKS = ["response"]
 
 
 def default_hooks():
     return {event: [] for event in HOOKS}
 
+
 # TODO: response is the only one
 
 
@@ -25,7 +24,7 @@ def dispatch_hook(key, hooks, hook_data, **kwargs):
     hooks = hooks or {}
     hooks = hooks.get(key)
     if hooks:
-        if hasattr(hooks, '__call__'):
+        if hasattr(hooks, "__call__"):
             hooks = [hooks]
         for hook in hooks:
             _hook_data = hook(hook_data, **kwargs)

src/requests/models.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.models
 ~~~~~~~~~~~~~~~
@@ -8,48 +6,72 @@ This module contains the primary objects that power Requests.
 """
 
 import datetime
-import sys
 
 # Import encoding now, to avoid implicit import later.
 # Implicit import within threads may cause LookupError when standard library is in a ZIP,
 # such as in Embedded Python. See https://github.com/psf/requests/issues/3578.
-import encodings.idna
+import encodings.idna  # noqa: F401
+from io import UnsupportedOperation
 
+from urllib3.exceptions import (
+    DecodeError,
+    LocationParseError,
+    ProtocolError,
+    ReadTimeoutError,
+    SSLError,
+)
 from urllib3.fields import RequestField
 from urllib3.filepost import encode_multipart_formdata
 from urllib3.util import parse_url
-from urllib3.exceptions import (
-    DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
 
-from io import UnsupportedOperation
-from .hooks import default_hooks
-from .structures import CaseInsensitiveDict
-
-from .auth import HTTPBasicAuth
-from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
-from .exceptions import (
-    HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
-    ContentDecodingError, ConnectionError, StreamConsumedError,
-    InvalidJSONError)
-from .exceptions import JSONDecodeError as RequestsJSONDecodeError
 from ._internal_utils import to_native_string, unicode_is_ascii
-from .utils import (
-    guess_filename, get_auth_from_url, requote_uri,
-    stream_decode_response_unicode, to_key_val_list, parse_header_links,
-    iter_slices, guess_json_utf, super_len, check_header_validity)
+from .auth import HTTPBasicAuth
 from .compat import (
-    Callable, Mapping,
-    cookielib, urlunparse, urlsplit, urlencode, str, bytes,
-    is_py2, chardet, builtin_str, basestring, JSONDecodeError)
+    Callable,
+    JSONDecodeError,
+    Mapping,
+    basestring,
+    builtin_str,
+    chardet,
+    cookielib,
+)
 from .compat import json as complexjson
+from .compat import urlencode, urlsplit, urlunparse
+from .cookies import _copy_cookie_jar, cookiejar_from_dict, get_cookie_header
+from .exceptions import (
+    ChunkedEncodingError,
+    ConnectionError,
+    ContentDecodingError,
+    HTTPError,
+    InvalidJSONError,
+    InvalidURL,
+)
+from .exceptions import JSONDecodeError as RequestsJSONDecodeError
+from .exceptions import MissingSchema
+from .exceptions import SSLError as RequestsSSLError
+from .exceptions import StreamConsumedError
+from .hooks import default_hooks
 from .status_codes import codes
+from .structures import CaseInsensitiveDict
+from .utils import (
+    check_header_validity,
+    get_auth_from_url,
+    guess_filename,
+    guess_json_utf,
+    iter_slices,
+    parse_header_links,
+    requote_uri,
+    stream_decode_response_unicode,
+    super_len,
+    to_key_val_list,
+)
 
 #: The set of HTTP status codes that indicate an automatically
 #: processable redirect.
 REDIRECT_STATI = (
-    codes.moved,               # 301
-    codes.found,               # 302
-    codes.other,               # 303
+    codes.moved,  # 301
+    codes.found,  # 302
+    codes.other,  # 303
     codes.temporary_redirect,  # 307
     codes.permanent_redirect,  # 308
 )
@@ -59,7 +81,7 @@ CONTENT_CHUNK_SIZE = 10 * 1024
 ITER_CHUNK_SIZE = 512
 
 
-class RequestEncodingMixin(object):
+class RequestEncodingMixin:
     @property
     def path_url(self):
         """Build the path URL to use."""
@@ -70,16 +92,16 @@ class RequestEncodingMixin(object):
 
         path = p.path
         if not path:
-            path = '/'
+            path = "/"
 
         url.append(path)
 
         query = p.query
         if query:
-            url.append('?')
+            url.append("?")
             url.append(query)
 
-        return ''.join(url)
+        return "".join(url)
 
     @staticmethod
     def _encode_params(data):
@@ -92,18 +114,21 @@ class RequestEncodingMixin(object):
 
         if isinstance(data, (str, bytes)):
             return data
-        elif hasattr(data, 'read'):
+        elif hasattr(data, "read"):
             return data
-        elif hasattr(data, '__iter__'):
+        elif hasattr(data, "__iter__"):
             result = []
             for k, vs in to_key_val_list(data):
-                if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
+                if isinstance(vs, basestring) or not hasattr(vs, "__iter__"):
                     vs = [vs]
                 for v in vs:
                     if v is not None:
                         result.append(
-                            (k.encode('utf-8') if isinstance(k, str) else k,
-                             v.encode('utf-8') if isinstance(v, str) else v))
+                            (
+                                k.encode("utf-8") if isinstance(k, str) else k,
+                                v.encode("utf-8") if isinstance(v, str) else v,
+                            )
+                        )
             return urlencode(result, doseq=True)
         else:
             return data
@@ -118,7 +143,7 @@ class RequestEncodingMixin(object):
         The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
         or 4-tuples (filename, fileobj, contentype, custom_headers).
         """
-        if (not files):
+        if not files:
             raise ValueError("Files must be provided.")
         elif isinstance(data, basestring):
             raise ValueError("Data must not be a string.")
@@ -128,7 +153,7 @@ class RequestEncodingMixin(object):
         files = to_key_val_list(files or {})
 
         for field, val in fields:
-            if isinstance(val, basestring) or not hasattr(val, '__iter__'):
+            if isinstance(val, basestring) or not hasattr(val, "__iter__"):
                 val = [val]
             for v in val:
                 if v is not None:
@@ -137,10 +162,15 @@ class RequestEncodingMixin(object):
                         v = str(v)
 
                     new_fields.append(
-                        (field.decode('utf-8') if isinstance(field, bytes) else field,
-                         v.encode('utf-8') if isinstance(v, str) else v))
+                        (
+                            field.decode("utf-8")
+                            if isinstance(field, bytes)
+                            else field,
+                            v.encode("utf-8") if isinstance(v, str) else v,
+                        )
+                    )
 
-        for (k, v) in files:
+        for k, v in files:
             # support for explicit filename
             ft = None
             fh = None
@@ -157,7 +187,7 @@ class RequestEncodingMixin(object):
 
             if isinstance(fp, (str, bytes, bytearray)):
                 fdata = fp
-            elif hasattr(fp, 'read'):
+            elif hasattr(fp, "read"):
                 fdata = fp.read()
             elif fp is None:
                 continue
@@ -173,16 +203,16 @@ class RequestEncodingMixin(object):
         return body, content_type
 
 
-class RequestHooksMixin(object):
+class RequestHooksMixin:
     def register_hook(self, event, hook):
         """Properly register a hook."""
 
         if event not in self.hooks:
-            raise ValueError('Unsupported event specified, with event name "%s"' % (event))
+            raise ValueError(f'Unsupported event specified, with event name "{event}"')
 
         if isinstance(hook, Callable):
             self.hooks[event].append(hook)
-        elif hasattr(hook, '__iter__'):
+        elif hasattr(hook, "__iter__"):
             self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
 
     def deregister_hook(self, event, hook):
@@ -225,10 +255,19 @@ class Request(RequestHooksMixin):
       <PreparedRequest [GET]>
     """
 
-    def __init__(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
-
+    def __init__(
+        self,
+        method=None,
+        url=None,
+        headers=None,
+        files=None,
+        data=None,
+        params=None,
+        auth=None,
+        cookies=None,
+        hooks=None,
+        json=None,
+    ):
         # Default empty dicts for dict params.
         data = [] if data is None else data
         files = [] if files is None else files
@@ -237,7 +276,7 @@ class Request(RequestHooksMixin):
         hooks = {} if hooks is None else hooks
 
         self.hooks = default_hooks()
-        for (k, v) in list(hooks.items()):
+        for k, v in list(hooks.items()):
             self.register_hook(event=k, hook=v)
 
         self.method = method
@@ -251,7 +290,7 @@ class Request(RequestHooksMixin):
         self.cookies = cookies
 
     def __repr__(self):
-        return '<Request [%s]>' % (self.method)
+        return f"<Request [{self.method}]>"
 
     def prepare(self):
         """Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
@@ -309,9 +348,19 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         #: integer denoting starting position of a readable file-like body.
         self._body_position = None
 
-    def prepare(self,
-            method=None, url=None, headers=None, files=None, data=None,
-            params=None, auth=None, cookies=None, hooks=None, json=None):
+    def prepare(
+        self,
+        method=None,
+        url=None,
+        headers=None,
+        files=None,
+        data=None,
+        params=None,
+        auth=None,
+        cookies=None,
+        hooks=None,
+        json=None,
+    ):
         """Prepares the entire request with the given parameters."""
 
         self.prepare_method(method)
@@ -328,7 +377,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         self.prepare_hooks(hooks)
 
     def __repr__(self):
-        return '<PreparedRequest [%s]>' % (self.method)
+        return f"<PreparedRequest [{self.method}]>"
 
     def copy(self):
         p = PreparedRequest()
@@ -352,7 +401,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         import idna
 
         try:
-            host = idna.encode(host, uts46=True).decode('utf-8')
+            host = idna.encode(host, uts46=True).decode("utf-8")
         except idna.IDNAError:
             raise UnicodeError
         return host
@@ -365,9 +414,9 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         #: on python 3.x.
         #: https://github.com/psf/requests/pull/2238
         if isinstance(url, bytes):
-            url = url.decode('utf8')
+            url = url.decode("utf8")
         else:
-            url = unicode(url) if is_py2 else str(url)
+            url = str(url)
 
         # Remove leading whitespaces from url
         url = url.lstrip()
@@ -375,7 +424,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         # Don't do any URL preparation for non-HTTP schemes like `mailto`,
         # `data` etc to work around exceptions from `url_parse`, which
         # handles RFC 3986 only.
-        if ':' in url and not url.lower().startswith('http'):
+        if ":" in url and not url.lower().startswith("http"):
             self.url = url
             return
 
@@ -386,13 +435,13 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             raise InvalidURL(*e.args)
 
         if not scheme:
-            error = ("Invalid URL {0!r}: No scheme supplied. Perhaps you meant http://{0}?")
-            error = error.format(to_native_string(url, 'utf8'))
-
-            raise MissingSchema(error)
+            raise MissingSchema(
+                f"Invalid URL {url!r}: No scheme supplied. "
+                f"Perhaps you meant https://{url}?"
+            )
 
         if not host:
-            raise InvalidURL("Invalid URL %r: No host supplied" % url)
+            raise InvalidURL(f"Invalid URL {url!r}: No host supplied")
 
         # In general, we want to try IDNA encoding the hostname if the string contains
         # non-ASCII characters. This allows users to automatically get the correct IDNA
@@ -402,33 +451,21 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             try:
                 host = self._get_idna_encoded_host(host)
             except UnicodeError:
-                raise InvalidURL('URL has an invalid label.')
-        elif host.startswith((u'*', u'.')):
-            raise InvalidURL('URL has an invalid label.')
+                raise InvalidURL("URL has an invalid label.")
+        elif host.startswith(("*", ".")):
+            raise InvalidURL("URL has an invalid label.")
 
         # Carefully reconstruct the network location
-        netloc = auth or ''
+        netloc = auth or ""
         if netloc:
-            netloc += '@'
+            netloc += "@"
         netloc += host
         if port:
-            netloc += ':' + str(port)
+            netloc += f":{port}"
 
         # Bare domains aren't valid URLs.
         if not path:
-            path = '/'
-
-        if is_py2:
-            if isinstance(scheme, str):
-                scheme = scheme.encode('utf-8')
-            if isinstance(netloc, str):
-                netloc = netloc.encode('utf-8')
-            if isinstance(path, str):
-                path = path.encode('utf-8')
-            if isinstance(query, str):
-                query = query.encode('utf-8')
-            if isinstance(fragment, str):
-                fragment = fragment.encode('utf-8')
+            path = "/"
 
         if isinstance(params, (str, bytes)):
             params = to_native_string(params)
@@ -436,7 +473,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         enc_params = self._encode_params(params)
         if enc_params:
             if query:
-                query = '%s&%s' % (query, enc_params)
+                query = f"{query}&{enc_params}"
             else:
                 query = enc_params
 
@@ -467,7 +504,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
         if not data and json is not None:
             # urllib3 requires a bytes-like body. Python 2's json.dumps
             # provides this natively, but Python 3 gives a Unicode string.
-            content_type = 'application/json'
+            content_type = "application/json"
 
             try:
                 body = complexjson.dumps(json, allow_nan=False)
@@ -475,12 +512,14 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
                 raise InvalidJSONError(ve, request=self)
 
             if not isinstance(body, bytes):
-                body = body.encode('utf-8')
+                body = body.encode("utf-8")
 
-        is_stream = all([
-            hasattr(data, '__iter__'),
-            not isinstance(data, (basestring, list, tuple, Mapping))
-        ])
+        is_stream = all(
+            [
+                hasattr(data, "__iter__"),
+                not isinstance(data, (basestring, list, tuple, Mapping)),
+            ]
+        )
 
         if is_stream:
             try:
@@ -490,24 +529,26 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
 
             body = data
 
-            if getattr(body, 'tell', None) is not None:
+            if getattr(body, "tell", None) is not None:
                 # Record the current file position before reading.
                 # This will allow us to rewind a file in the event
                 # of a redirect.
                 try:
                     self._body_position = body.tell()
-                except (IOError, OSError):
+                except OSError:
                     # This differentiates from None, allowing us to catch
                     # a failed `tell()` later when trying to rewind the body
                     self._body_position = object()
 
             if files:
-                raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
+                raise NotImplementedError(
+                    "Streamed bodies and files are mutually exclusive."
+                )
 
             if length:
-                self.headers['Content-Length'] = builtin_str(length)
+                self.headers["Content-Length"] = builtin_str(length)
             else:
-                self.headers['Transfer-Encoding'] = 'chunked'
+                self.headers["Transfer-Encoding"] = "chunked"
         else:
             # Multi-part file uploads.
             if files:
@@ -515,16 +556,16 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             else:
                 if data:
                     body = self._encode_params(data)
-                    if isinstance(data, basestring) or hasattr(data, 'read'):
+                    if isinstance(data, basestring) or hasattr(data, "read"):
                         content_type = None
                     else:
-                        content_type = 'application/x-www-form-urlencoded'
+                        content_type = "application/x-www-form-urlencoded"
 
             self.prepare_content_length(body)
 
             # Add content-type if it wasn't explicitly provided.
-            if content_type and ('content-type' not in self.headers):
-                self.headers['Content-Type'] = content_type
+            if content_type and ("content-type" not in self.headers):
+                self.headers["Content-Type"] = content_type
 
         self.body = body
 
@@ -535,13 +576,16 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             if length:
                 # If length exists, set it. Otherwise, we fallback
                 # to Transfer-Encoding: chunked.
-                self.headers['Content-Length'] = builtin_str(length)
-        elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
+                self.headers["Content-Length"] = builtin_str(length)
+        elif (
+            self.method not in ("GET", "HEAD")
+            and self.headers.get("Content-Length") is None
+        ):
             # Set Content-Length to 0 for methods that can have a body
             # but don't provide one. (i.e. not GET or HEAD)
-            self.headers['Content-Length'] = '0'
+            self.headers["Content-Length"] = "0"
 
-    def prepare_auth(self, auth, url=''):
+    def prepare_auth(self, auth, url=""):
         """Prepares the given HTTP auth data."""
 
         # If no Auth is explicitly provided, extract it from the URL first.
@@ -581,7 +625,7 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
 
         cookie_header = get_cookie_header(self._cookies, self)
         if cookie_header is not None:
-            self.headers['Cookie'] = cookie_header
+            self.headers["Cookie"] = cookie_header
 
     def prepare_hooks(self, hooks):
         """Prepares the given hooks."""
@@ -593,14 +637,22 @@ class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
             self.register_hook(event, hooks[event])
 
 
-class Response(object):
+class Response:
     """The :class:`Response <Response>` object, which contains a
     server's response to an HTTP request.
     """
 
     __attrs__ = [
-        '_content', 'status_code', 'headers', 'url', 'history',
-        'encoding', 'reason', 'cookies', 'elapsed', 'request'
+        "_content",
+        "status_code",
+        "headers",
+        "url",
+        "history",
+        "encoding",
+        "reason",
+        "cookies",
+        "elapsed",
+        "request",
     ]
 
     def __init__(self):
@@ -669,11 +721,11 @@ class Response(object):
             setattr(self, name, value)
 
         # pickled objects do not have .raw
-        setattr(self, '_content_consumed', True)
-        setattr(self, 'raw', None)
+        setattr(self, "_content_consumed", True)
+        setattr(self, "raw", None)
 
     def __repr__(self):
-        return '<Response [%s]>' % (self.status_code)
+        return f"<Response [{self.status_code}]>"
 
     def __bool__(self):
         """Returns True if :attr:`status_code` is less than 400.
@@ -719,12 +771,15 @@ class Response(object):
         """True if this Response is a well-formed HTTP redirect that could have
         been processed automatically (by :meth:`Session.resolve_redirects`).
         """
-        return ('location' in self.headers and self.status_code in REDIRECT_STATI)
+        return "location" in self.headers and self.status_code in REDIRECT_STATI
 
     @property
     def is_permanent_redirect(self):
         """True if this Response one of the permanent versions of redirect."""
-        return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
+        return "location" in self.headers and self.status_code in (
+            codes.moved_permanently,
+            codes.permanent_redirect,
+        )
 
     @property
     def next(self):
@@ -734,7 +789,12 @@ class Response(object):
     @property
     def apparent_encoding(self):
         """The apparent encoding, provided by the charset_normalizer or chardet libraries."""
-        return chardet.detect(self.content)['encoding']
+        if chardet is not None:
+            return chardet.detect(self.content)["encoding"]
+        else:
+            # If no character detection library is available, we'll fall back
+            # to a standard Python utf-8 str.
+            return "utf-8"
 
     def iter_content(self, chunk_size=1, decode_unicode=False):
         """Iterates over the response data.  When stream=True is set on the
@@ -755,16 +815,17 @@ class Response(object):
 
         def generate():
             # Special case for urllib3.
-            if hasattr(self.raw, 'stream'):
+            if hasattr(self.raw, "stream"):
                 try:
-                    for chunk in self.raw.stream(chunk_size, decode_content=True):
-                        yield chunk
+                    yield from self.raw.stream(chunk_size, decode_content=True)
                 except ProtocolError as e:
                     raise ChunkedEncodingError(e)
                 except DecodeError as e:
                     raise ContentDecodingError(e)
                 except ReadTimeoutError as e:
                     raise ConnectionError(e)
+                except SSLError as e:
+                    raise RequestsSSLError(e)
             else:
                 # Standard file-like object.
                 while True:
@@ -778,7 +839,9 @@ class Response(object):
         if self._content_consumed and isinstance(self._content, bool):
             raise StreamConsumedError()
         elif chunk_size is not None and not isinstance(chunk_size, int):
-            raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
+            raise TypeError(
+                f"chunk_size must be an int, it is instead a {type(chunk_size)}."
+            )
         # simulate reading small chunks of the content
         reused_chunks = iter_slices(self._content, chunk_size)
 
@@ -791,7 +854,9 @@ class Response(object):
 
         return chunks
 
-    def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
+    def iter_lines(
+        self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None
+    ):
         """Iterates over the response data, one line at a time.  When
         stream=True is set on the request, this avoids reading the
         content at once into memory for large responses.
@@ -801,8 +866,9 @@ class Response(object):
 
         pending = None
 
-        for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
-
+        for chunk in self.iter_content(
+            chunk_size=chunk_size, decode_unicode=decode_unicode
+        ):
             if pending is not None:
                 chunk = pending + chunk
 
@@ -816,8 +882,7 @@ class Response(object):
             else:
                 pending = None
 
-            for line in lines:
-                yield line
+            yield from lines
 
         if pending is not None:
             yield pending
@@ -829,13 +894,12 @@ class Response(object):
         if self._content is False:
             # Read the contents.
             if self._content_consumed:
-                raise RuntimeError(
-                    'The content for this response was already consumed')
+                raise RuntimeError("The content for this response was already consumed")
 
             if self.status_code == 0 or self.raw is None:
                 self._content = None
             else:
-                self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
+                self._content = b"".join(self.iter_content(CONTENT_CHUNK_SIZE)) or b""
 
         self._content_consumed = True
         # don't need to release the connection; that's been handled by urllib3
@@ -860,7 +924,7 @@ class Response(object):
         encoding = self.encoding
 
         if not self.content:
-            return str('')
+            return ""
 
         # Fallback to auto-detected encoding.
         if self.encoding is None:
@@ -868,7 +932,7 @@ class Response(object):
 
         # Decode unicode from given encoding.
         try:
-            content = str(self.content, encoding, errors='replace')
+            content = str(self.content, encoding, errors="replace")
         except (LookupError, TypeError):
             # A LookupError is raised if the encoding was not found which could
             # indicate a misspelling or similar mistake.
@@ -876,12 +940,14 @@ class Response(object):
             # A TypeError can be raised if encoding is None
             #
             # So we try blindly encoding.
-            content = str(self.content, errors='replace')
+            content = str(self.content, errors="replace")
 
         return content
 
     def json(self, **kwargs):
-        r"""Returns the json-encoded content of a response, if any.
+        r"""Decodes the JSON response body (if any) as a Python object.
+
+        This may return a dictionary, list, etc. depending on what is in the response.
 
         :param \*\*kwargs: Optional arguments that ``json.loads`` takes.
         :raises requests.exceptions.JSONDecodeError: If the response body does not
@@ -896,65 +962,65 @@ class Response(object):
             encoding = guess_json_utf(self.content)
             if encoding is not None:
                 try:
-                    return complexjson.loads(
-                        self.content.decode(encoding), **kwargs
-                    )
+                    return complexjson.loads(self.content.decode(encoding), **kwargs)
                 except UnicodeDecodeError:
                     # Wrong UTF codec detected; usually because it's not UTF-8
                     # but some other 8-bit codec.  This is an RFC violation,
                     # and the server didn't bother to tell us what codec *was*
                     # used.
                     pass
+                except JSONDecodeError as e:
+                    raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
 
         try:
             return complexjson.loads(self.text, **kwargs)
         except JSONDecodeError as e:
             # Catch JSON-related errors and raise as requests.JSONDecodeError
             # This aliases json.JSONDecodeError and simplejson.JSONDecodeError
-            if is_py2: # e is a ValueError
-                raise RequestsJSONDecodeError(e.message)
-            else:
-                raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
+            raise RequestsJSONDecodeError(e.msg, e.doc, e.pos)
 
     @property
     def links(self):
         """Returns the parsed header links of the response, if any."""
 
-        header = self.headers.get('link')
+        header = self.headers.get("link")
 
-        # l = MultiDict()
-        l = {}
+        resolved_links = {}
 
         if header:
             links = parse_header_links(header)
 
             for link in links:
-                key = link.get('rel') or link.get('url')
-                l[key] = link
+                key = link.get("rel") or link.get("url")
+                resolved_links[key] = link
 
-        return l
+        return resolved_links
 
     def raise_for_status(self):
         """Raises :class:`HTTPError`, if one occurred."""
 
-        http_error_msg = ''
+        http_error_msg = ""
         if isinstance(self.reason, bytes):
             # We attempt to decode utf-8 first because some servers
             # choose to localize their reason strings. If the string
             # isn't utf-8, we fall back to iso-8859-1 for all other
             # encodings. (See PR #3538)
             try:
-                reason = self.reason.decode('utf-8')
+                reason = self.reason.decode("utf-8")
             except UnicodeDecodeError:
-                reason = self.reason.decode('iso-8859-1')
+                reason = self.reason.decode("iso-8859-1")
         else:
             reason = self.reason
 
         if 400 <= self.status_code < 500:
-            http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
+            http_error_msg = (
+                f"{self.status_code} Client Error: {reason} for url: {self.url}"
+            )
 
         elif 500 <= self.status_code < 600:
-            http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
+            http_error_msg = (
+                f"{self.status_code} Server Error: {reason} for url: {self.url}"
+            )
 
         if http_error_msg:
             raise HTTPError(http_error_msg, response=self)
@@ -968,6 +1034,6 @@ class Response(object):
         if not self._content_consumed:
             self.raw.close()
 
-        release_conn = getattr(self.raw, 'release_conn', None)
+        release_conn = getattr(self.raw, "release_conn", None)
         if release_conn is not None:
             release_conn()

src/requests/packages.py

@@ -0,0 +1,23 @@
+import sys
+
+from .compat import chardet
+
+# This code exists for backwards compatibility reasons.
+# I don't like it either. Just look the other way. :)
+
+for package in ("urllib3", "idna"):
+    locals()[package] = __import__(package)
+    # This traversal is apparently necessary such that the identities are
+    # preserved (requests.packages.urllib3.* is urllib3.*)
+    for mod in list(sys.modules):
+        if mod == package or mod.startswith(f"{package}."):
+            sys.modules[f"requests.packages.{mod}"] = sys.modules[mod]
+
+if chardet is not None:
+    target = chardet.__name__
+    for mod in list(sys.modules):
+        if mod == target or mod.startswith(f"{target}."):
+            imported_mod = sys.modules[mod]
+            sys.modules[f"requests.packages.{mod}"] = imported_mod
+            mod = mod.replace(target, "chardet")
+            sys.modules[f"requests.packages.{mod}"] = imported_mod

src/requests/sessions.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.sessions
 ~~~~~~~~~~~~~~~~~
@@ -10,39 +8,52 @@ requests (cookies, auth, proxies).
 import os
 import sys
 import time
-from datetime import timedelta
 from collections import OrderedDict
+from datetime import timedelta
 
-from .auth import _basic_auth_str
-from .compat import cookielib, is_py3, urljoin, urlparse, Mapping
-from .cookies import (
-    cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
-from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
-from .hooks import default_hooks, dispatch_hook
 from ._internal_utils import to_native_string
-from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
-from .exceptions import (
-    TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
-
-from .structures import CaseInsensitiveDict
 from .adapters import HTTPAdapter
-
-from .utils import (
-    requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
-    get_auth_from_url, rewind_body, resolve_proxies
+from .auth import _basic_auth_str
+from .compat import Mapping, cookielib, urljoin, urlparse
+from .cookies import (
+    RequestsCookieJar,
+    cookiejar_from_dict,
+    extract_cookies_to_jar,
+    merge_cookies,
 )
-
-from .status_codes import codes
+from .exceptions import (
+    ChunkedEncodingError,
+    ContentDecodingError,
+    InvalidSchema,
+    TooManyRedirects,
+)
+from .hooks import default_hooks, dispatch_hook
 
 # formerly defined here, reexposed here for backward compatibility
-from .models import REDIRECT_STATI
+from .models import (  # noqa: F401
+    DEFAULT_REDIRECT_LIMIT,
+    REDIRECT_STATI,
+    PreparedRequest,
+    Request,
+)
+from .status_codes import codes
+from .structures import CaseInsensitiveDict
+from .utils import (  # noqa: F401
+    DEFAULT_PORTS,
+    default_headers,
+    get_auth_from_url,
+    get_environ_proxies,
+    get_netrc_auth,
+    requote_uri,
+    resolve_proxies,
+    rewind_body,
+    should_bypass_proxies,
+    to_key_val_list,
+)
 
 # Preferred clock, based on which one is more accurate on a given system.
-if sys.platform == 'win32':
-    try:  # Python 3.4+
-        preferred_clock = time.perf_counter
-    except AttributeError:  # Earlier than Python 3.
-        preferred_clock = time.clock
+if sys.platform == "win32":
+    preferred_clock = time.perf_counter
 else:
     preferred_clock = time.time
 
@@ -61,8 +72,7 @@ def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
 
     # Bypass if not a dictionary (e.g. verify)
     if not (
-            isinstance(session_setting, Mapping) and
-            isinstance(request_setting, Mapping)
+        isinstance(session_setting, Mapping) and isinstance(request_setting, Mapping)
     ):
         return request_setting
 
@@ -84,17 +94,16 @@ def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
     This is necessary because when request_hooks == {'response': []}, the
     merge breaks Session hooks entirely.
     """
-    if session_hooks is None or session_hooks.get('response') == []:
+    if session_hooks is None or session_hooks.get("response") == []:
         return request_hooks
 
-    if request_hooks is None or request_hooks.get('response') == []:
+    if request_hooks is None or request_hooks.get("response") == []:
         return session_hooks
 
     return merge_setting(request_hooks, session_hooks, dict_class)
 
 
-class SessionRedirectMixin(object):
-
+class SessionRedirectMixin:
     def get_redirect_target(self, resp):
         """Receives a Response. Returns a redirect URI or ``None``"""
         # Due to the nature of how requests processes redirects this method will
@@ -104,16 +113,15 @@ class SessionRedirectMixin(object):
         # to cache the redirect location onto the response object as a private
         # attribute.
         if resp.is_redirect:
-            location = resp.headers['location']
+            location = resp.headers["location"]
             # Currently the underlying http module on py3 decode headers
             # in latin1, but empirical evidence suggests that latin1 is very
             # rarely used with non-ASCII characters in HTTP headers.
             # It is more likely to get UTF8 header rather than latin1.
             # This causes incorrect handling of UTF8 encoded location headers.
             # To solve this, we re-encode the location in latin1.
-            if is_py3:
-                location = location.encode('latin1')
-            return to_native_string(location, 'utf8')
+            location = location.encode("latin1")
+            return to_native_string(location, "utf8")
         return None
 
     def should_strip_auth(self, old_url, new_url):
@@ -126,23 +134,40 @@ class SessionRedirectMixin(object):
         # ports. This isn't specified by RFC 7235, but is kept to avoid
         # breaking backwards compatibility with older versions of requests
         # that allowed any redirects on the same host.
-        if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
-                and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
+        if (
+            old_parsed.scheme == "http"
+            and old_parsed.port in (80, None)
+            and new_parsed.scheme == "https"
+            and new_parsed.port in (443, None)
+        ):
             return False
 
         # Handle default port usage corresponding to scheme.
         changed_port = old_parsed.port != new_parsed.port
         changed_scheme = old_parsed.scheme != new_parsed.scheme
         default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
-        if (not changed_scheme and old_parsed.port in default_port
-                and new_parsed.port in default_port):
+        if (
+            not changed_scheme
+            and old_parsed.port in default_port
+            and new_parsed.port in default_port
+        ):
             return False
 
         # Standard case: root URI must match
         return changed_port or changed_scheme
 
-    def resolve_redirects(self, resp, req, stream=False, timeout=None,
-                          verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
+    def resolve_redirects(
+        self,
+        resp,
+        req,
+        stream=False,
+        timeout=None,
+        verify=True,
+        cert=None,
+        proxies=None,
+        yield_requests=False,
+        **adapter_kwargs,
+    ):
         """Receives a Response. Returns a generator of Responses or Requests."""
 
         hist = []  # keep track of history
@@ -163,19 +188,21 @@ class SessionRedirectMixin(object):
                 resp.raw.read(decode_content=False)
 
             if len(resp.history) >= self.max_redirects:
-                raise TooManyRedirects('Exceeded {} redirects.'.format(self.max_redirects), response=resp)
+                raise TooManyRedirects(
+                    f"Exceeded {self.max_redirects} redirects.", response=resp
+                )
 
             # Release the connection back into the pool.
             resp.close()
 
             # Handle redirection without scheme (see: RFC 1808 Section 4)
-            if url.startswith('//'):
+            if url.startswith("//"):
                 parsed_rurl = urlparse(resp.url)
-                url = ':'.join([to_native_string(parsed_rurl.scheme), url])
+                url = ":".join([to_native_string(parsed_rurl.scheme), url])
 
             # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
             parsed = urlparse(url)
-            if parsed.fragment == '' and previous_fragment:
+            if parsed.fragment == "" and previous_fragment:
                 parsed = parsed._replace(fragment=previous_fragment)
             elif parsed.fragment:
                 previous_fragment = parsed.fragment
@@ -194,15 +221,18 @@ class SessionRedirectMixin(object):
             self.rebuild_method(prepared_request, resp)
 
             # https://github.com/psf/requests/issues/1084
-            if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
+            if resp.status_code not in (
+                codes.temporary_redirect,
+                codes.permanent_redirect,
+            ):
                 # https://github.com/psf/requests/issues/3490
-                purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
+                purged_headers = ("Content-Length", "Content-Type", "Transfer-Encoding")
                 for header in purged_headers:
                     prepared_request.headers.pop(header, None)
                 prepared_request.body = None
 
             headers = prepared_request.headers
-            headers.pop('Cookie', None)
+            headers.pop("Cookie", None)
 
             # Extract any cookies sent on the response to the cookiejar
             # in the new request. Because we've mutated our copied prepared
@@ -218,9 +248,8 @@ class SessionRedirectMixin(object):
             # A failed tell() sets `_body_position` to `object()`. This non-None
             # value ensures `rewindable` will be True, allowing us to raise an
             # UnrewindableBodyError, instead of hanging the connection.
-            rewindable = (
-                prepared_request._body_position is not None and
-                ('Content-Length' in headers or 'Transfer-Encoding' in headers)
+            rewindable = prepared_request._body_position is not None and (
+                "Content-Length" in headers or "Transfer-Encoding" in headers
             )
 
             # Attempt to rewind consumed file-like object.
@@ -233,7 +262,6 @@ class SessionRedirectMixin(object):
             if yield_requests:
                 yield req
             else:
-
                 resp = self.send(
                     req,
                     stream=stream,
@@ -242,7 +270,7 @@ class SessionRedirectMixin(object):
                     cert=cert,
                     proxies=proxies,
                     allow_redirects=False,
-                    **adapter_kwargs
+                    **adapter_kwargs,
                 )
 
                 extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
@@ -259,10 +287,12 @@ class SessionRedirectMixin(object):
         headers = prepared_request.headers
         url = prepared_request.url
 
-        if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
+        if "Authorization" in headers and self.should_strip_auth(
+            response.request.url, url
+        ):
             # If we get redirected to a new host, we should strip out any
             # authentication headers.
-            del headers['Authorization']
+            del headers["Authorization"]
 
         # .netrc might have more auth for us on our new host.
         new_auth = get_netrc_auth(url) if self.trust_env else None
@@ -285,16 +315,18 @@ class SessionRedirectMixin(object):
         scheme = urlparse(prepared_request.url).scheme
         new_proxies = resolve_proxies(prepared_request, proxies, self.trust_env)
 
-        if 'Proxy-Authorization' in headers:
-            del headers['Proxy-Authorization']
+        if "Proxy-Authorization" in headers:
+            del headers["Proxy-Authorization"]
 
         try:
             username, password = get_auth_from_url(new_proxies[scheme])
         except KeyError:
             username, password = None, None
 
-        if username and password:
-            headers['Proxy-Authorization'] = _basic_auth_str(username, password)
+        # urllib3 handles proxy authorization for us in the standard adapter.
+        # Avoid appending this to TLS tunneled requests where it may be leaked.
+        if not scheme.startswith("https") and username and password:
+            headers["Proxy-Authorization"] = _basic_auth_str(username, password)
 
         return new_proxies
 
@@ -305,18 +337,18 @@ class SessionRedirectMixin(object):
         method = prepared_request.method
 
         # https://tools.ietf.org/html/rfc7231#section-6.4.4
-        if response.status_code == codes.see_other and method != 'HEAD':
-            method = 'GET'
+        if response.status_code == codes.see_other and method != "HEAD":
+            method = "GET"
 
         # Do what the browsers do, despite standards...
         # First, turn 302s into GETs.
-        if response.status_code == codes.found and method != 'HEAD':
-            method = 'GET'
+        if response.status_code == codes.found and method != "HEAD":
+            method = "GET"
 
         # Second, if a POST is responded to with a 301, turn it into a GET.
         # This bizarre behaviour is explained in Issue 1704.
-        if response.status_code == codes.moved and method == 'POST':
-            method = 'GET'
+        if response.status_code == codes.moved and method == "POST":
+            method = "GET"
 
         prepared_request.method = method
 
@@ -341,13 +373,21 @@ class Session(SessionRedirectMixin):
     """
 
     __attrs__ = [
-        'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
-        'cert', 'adapters', 'stream', 'trust_env',
-        'max_redirects',
+        "headers",
+        "cookies",
+        "auth",
+        "proxies",
+        "hooks",
+        "params",
+        "verify",
+        "cert",
+        "adapters",
+        "stream",
+        "trust_env",
+        "max_redirects",
     ]
 
     def __init__(self):
-
         #: A case-insensitive dictionary of headers to be sent on each
         #: :class:`Request <Request>` sent from this
         #: :class:`Session <Session>`.
@@ -405,8 +445,8 @@ class Session(SessionRedirectMixin):
 
         # Default connection adapters.
         self.adapters = OrderedDict()
-        self.mount('https://', HTTPAdapter())
-        self.mount('http://', HTTPAdapter())
+        self.mount("https://", HTTPAdapter())
+        self.mount("http://", HTTPAdapter())
 
     def __enter__(self):
         return self
@@ -432,7 +472,8 @@ class Session(SessionRedirectMixin):
 
         # Merge with session cookies
         merged_cookies = merge_cookies(
-            merge_cookies(RequestsCookieJar(), self.cookies), cookies)
+            merge_cookies(RequestsCookieJar(), self.cookies), cookies
+        )
 
         # Set environment's basic authentication if not explicitly set.
         auth = request.auth
@@ -446,7 +487,9 @@ class Session(SessionRedirectMixin):
             files=request.files,
             data=request.data,
             json=request.json,
-            headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
+            headers=merge_setting(
+                request.headers, self.headers, dict_class=CaseInsensitiveDict
+            ),
             params=merge_setting(request.params, self.params),
             auth=merge_setting(auth, self.auth),
             cookies=merged_cookies,
@@ -454,10 +497,25 @@ class Session(SessionRedirectMixin):
         )
         return p
 
-    def request(self, method, url,
-            params=None, data=None, headers=None, cookies=None, files=None,
-            auth=None, timeout=None, allow_redirects=True, proxies=None,
-            hooks=None, stream=None, verify=None, cert=None, json=None):
+    def request(
+        self,
+        method,
+        url,
+        params=None,
+        data=None,
+        headers=None,
+        cookies=None,
+        files=None,
+        auth=None,
+        timeout=None,
+        allow_redirects=True,
+        proxies=None,
+        hooks=None,
+        stream=None,
+        verify=None,
+        cert=None,
+        json=None,
+    ):
         """Constructs a :class:`Request <Request>`, prepares it and sends it.
         Returns :class:`Response <Response>` object.
 
@@ -477,7 +535,7 @@ class Session(SessionRedirectMixin):
             for multipart encoding upload.
         :param auth: (optional) Auth tuple or callable to enable
             Basic/Digest/Custom HTTP Auth.
-        :param timeout: (optional) How long to wait for the server to send
+        :param timeout: (optional) How many seconds to wait for the server to send
             data before giving up, as a float, or a :ref:`(connect timeout,
             read timeout) <timeouts>` tuple.
         :type timeout: float or tuple
@@ -485,6 +543,8 @@ class Session(SessionRedirectMixin):
         :type allow_redirects: bool
         :param proxies: (optional) Dictionary mapping protocol or protocol and
             hostname to the URL of the proxy.
+        :param hooks: (optional) Dictionary mapping hook name to one event or
+            list of events, event must be callable.
         :param stream: (optional) whether to immediately download the response
             content. Defaults to ``False``.
         :param verify: (optional) Either a boolean, in which case it controls whether we verify
@@ -493,7 +553,7 @@ class Session(SessionRedirectMixin):
             ``False``, requests will accept any TLS certificate presented by
             the server, and will ignore hostname mismatches and/or expired
             certificates, which will make your application vulnerable to
-            man-in-the-middle (MitM) attacks. Setting verify to ``False`` 
+            man-in-the-middle (MitM) attacks. Setting verify to ``False``
             may be useful during local development or testing.
         :param cert: (optional) if String, path to ssl client cert file (.pem).
             If Tuple, ('cert', 'key') pair.
@@ -522,8 +582,8 @@ class Session(SessionRedirectMixin):
 
         # Send the request.
         send_kwargs = {
-            'timeout': timeout,
-            'allow_redirects': allow_redirects,
+            "timeout": timeout,
+            "allow_redirects": allow_redirects,
         }
         send_kwargs.update(settings)
         resp = self.send(prep, **send_kwargs)
@@ -538,8 +598,8 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('GET', url, **kwargs)
+        kwargs.setdefault("allow_redirects", True)
+        return self.request("GET", url, **kwargs)
 
     def options(self, url, **kwargs):
         r"""Sends a OPTIONS request. Returns :class:`Response` object.
@@ -549,8 +609,8 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        kwargs.setdefault('allow_redirects', True)
-        return self.request('OPTIONS', url, **kwargs)
+        kwargs.setdefault("allow_redirects", True)
+        return self.request("OPTIONS", url, **kwargs)
 
     def head(self, url, **kwargs):
         r"""Sends a HEAD request. Returns :class:`Response` object.
@@ -560,8 +620,8 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        kwargs.setdefault('allow_redirects', False)
-        return self.request('HEAD', url, **kwargs)
+        kwargs.setdefault("allow_redirects", False)
+        return self.request("HEAD", url, **kwargs)
 
     def post(self, url, data=None, json=None, **kwargs):
         r"""Sends a POST request. Returns :class:`Response` object.
@@ -574,7 +634,7 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        return self.request('POST', url, data=data, json=json, **kwargs)
+        return self.request("POST", url, data=data, json=json, **kwargs)
 
     def put(self, url, data=None, **kwargs):
         r"""Sends a PUT request. Returns :class:`Response` object.
@@ -586,7 +646,7 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        return self.request('PUT', url, data=data, **kwargs)
+        return self.request("PUT", url, data=data, **kwargs)
 
     def patch(self, url, data=None, **kwargs):
         r"""Sends a PATCH request. Returns :class:`Response` object.
@@ -598,7 +658,7 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        return self.request('PATCH', url, data=data, **kwargs)
+        return self.request("PATCH", url, data=data, **kwargs)
 
     def delete(self, url, **kwargs):
         r"""Sends a DELETE request. Returns :class:`Response` object.
@@ -608,7 +668,7 @@ class Session(SessionRedirectMixin):
         :rtype: requests.Response
         """
 
-        return self.request('DELETE', url, **kwargs)
+        return self.request("DELETE", url, **kwargs)
 
     def send(self, request, **kwargs):
         """Send a given PreparedRequest.
@@ -617,22 +677,20 @@ class Session(SessionRedirectMixin):
         """
         # Set defaults that the hooks can utilize to ensure they always have
         # the correct parameters to reproduce the previous request.
-        kwargs.setdefault('stream', self.stream)
-        kwargs.setdefault('verify', self.verify)
-        kwargs.setdefault('cert', self.cert)
-        if 'proxies' not in kwargs:
-            kwargs['proxies'] = resolve_proxies(
-                request, self.proxies, self.trust_env
-            )
+        kwargs.setdefault("stream", self.stream)
+        kwargs.setdefault("verify", self.verify)
+        kwargs.setdefault("cert", self.cert)
+        if "proxies" not in kwargs:
+            kwargs["proxies"] = resolve_proxies(request, self.proxies, self.trust_env)
 
         # It's possible that users might accidentally send a Request object.
         # Guard against that specific failure case.
         if isinstance(request, Request):
-            raise ValueError('You can only send PreparedRequests.')
+            raise ValueError("You can only send PreparedRequests.")
 
         # Set up variables needed for resolve_redirects and dispatching of hooks
-        allow_redirects = kwargs.pop('allow_redirects', True)
-        stream = kwargs.get('stream')
+        allow_redirects = kwargs.pop("allow_redirects", True)
+        stream = kwargs.get("stream")
         hooks = request.hooks
 
         # Get the appropriate adapter to use
@@ -649,11 +707,10 @@ class Session(SessionRedirectMixin):
         r.elapsed = timedelta(seconds=elapsed)
 
         # Response manipulation hooks
-        r = dispatch_hook('response', hooks, r, **kwargs)
+        r = dispatch_hook("response", hooks, r, **kwargs)
 
         # Persist cookies
         if r.history:
-
             # If the hooks create history then we want those cookies too
             for resp in r.history:
                 extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
@@ -679,7 +736,9 @@ class Session(SessionRedirectMixin):
         # If redirects aren't being followed, store the response on the Request for Response.next().
         if not allow_redirects:
             try:
-                r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
+                r._next = next(
+                    self.resolve_redirects(r, request, yield_requests=True, **kwargs)
+                )
             except StopIteration:
                 pass
 
@@ -697,16 +756,19 @@ class Session(SessionRedirectMixin):
         # Gather clues from the surrounding environment.
         if self.trust_env:
             # Set environment's proxies.
-            no_proxy = proxies.get('no_proxy') if proxies is not None else None
+            no_proxy = proxies.get("no_proxy") if proxies is not None else None
             env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
-            for (k, v) in env_proxies.items():
+            for k, v in env_proxies.items():
                 proxies.setdefault(k, v)
 
-            # Look for requests environment configuration and be compatible
-            # with cURL.
+            # Look for requests environment configuration
+            # and be compatible with cURL.
             if verify is True or verify is None:
-                verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
-                          os.environ.get('CURL_CA_BUNDLE'))
+                verify = (
+                    os.environ.get("REQUESTS_CA_BUNDLE")
+                    or os.environ.get("CURL_CA_BUNDLE")
+                    or verify
+                )
 
         # Merge all the kwargs.
         proxies = merge_setting(proxies, self.proxies)
@@ -714,8 +776,7 @@ class Session(SessionRedirectMixin):
         verify = merge_setting(verify, self.verify)
         cert = merge_setting(cert, self.cert)
 
-        return {'verify': verify, 'proxies': proxies, 'stream': stream,
-                'cert': cert}
+        return {"proxies": proxies, "stream": stream, "verify": verify, "cert": cert}
 
     def get_adapter(self, url):
         """
@@ -723,13 +784,12 @@ class Session(SessionRedirectMixin):
 
         :rtype: requests.adapters.BaseAdapter
         """
-        for (prefix, adapter) in self.adapters.items():
-
+        for prefix, adapter in self.adapters.items():
             if url.lower().startswith(prefix.lower()):
                 return adapter
 
         # Nothing matches :-/
-        raise InvalidSchema("No connection adapters were found for {!r}".format(url))
+        raise InvalidSchema(f"No connection adapters were found for {url!r}")
 
     def close(self):
         """Closes all adapters and as such the session"""

src/requests/status_codes.py

@@ -0,0 +1,128 @@
+r"""
+The ``codes`` object defines a mapping from common names for HTTP statuses
+to their numerical codes, accessible either as attributes or as dictionary
+items.
+
+Example::
+
+    >>> import requests
+    >>> requests.codes['temporary_redirect']
+    307
+    >>> requests.codes.teapot
+    418
+    >>> requests.codes['\o/']
+    200
+
+Some codes have multiple names, and both upper- and lower-case versions of
+the names are allowed. For example, ``codes.ok``, ``codes.OK``, and
+``codes.okay`` all correspond to the HTTP status code 200.
+"""
+
+from .structures import LookupDict
+
+_codes = {
+    # Informational.
+    100: ("continue",),
+    101: ("switching_protocols",),
+    102: ("processing", "early-hints"),
+    103: ("checkpoint",),
+    122: ("uri_too_long", "request_uri_too_long"),
+    200: ("ok", "okay", "all_ok", "all_okay", "all_good", "\\o/", "✓"),
+    201: ("created",),
+    202: ("accepted",),
+    203: ("non_authoritative_info", "non_authoritative_information"),
+    204: ("no_content",),
+    205: ("reset_content", "reset"),
+    206: ("partial_content", "partial"),
+    207: ("multi_status", "multiple_status", "multi_stati", "multiple_stati"),
+    208: ("already_reported",),
+    226: ("im_used",),
+    # Redirection.
+    300: ("multiple_choices",),
+    301: ("moved_permanently", "moved", "\\o-"),
+    302: ("found",),
+    303: ("see_other", "other"),
+    304: ("not_modified",),
+    305: ("use_proxy",),
+    306: ("switch_proxy",),
+    307: ("temporary_redirect", "temporary_moved", "temporary"),
+    308: (
+        "permanent_redirect",
+        "resume_incomplete",
+        "resume",
+    ),  # "resume" and "resume_incomplete" to be removed in 3.0
+    # Client Error.
+    400: ("bad_request", "bad"),
+    401: ("unauthorized",),
+    402: ("payment_required", "payment"),
+    403: ("forbidden",),
+    404: ("not_found", "-o-"),
+    405: ("method_not_allowed", "not_allowed"),
+    406: ("not_acceptable",),
+    407: ("proxy_authentication_required", "proxy_auth", "proxy_authentication"),
+    408: ("request_timeout", "timeout"),
+    409: ("conflict",),
+    410: ("gone",),
+    411: ("length_required",),
+    412: ("precondition_failed", "precondition"),
+    413: ("request_entity_too_large", "content_too_large"),
+    414: ("request_uri_too_large", "uri_too_long"),
+    415: ("unsupported_media_type", "unsupported_media", "media_type"),
+    416: (
+        "requested_range_not_satisfiable",
+        "requested_range",
+        "range_not_satisfiable",
+    ),
+    417: ("expectation_failed",),
+    418: ("im_a_teapot", "teapot", "i_am_a_teapot"),
+    421: ("misdirected_request",),
+    422: ("unprocessable_entity", "unprocessable", "unprocessable_content"),
+    423: ("locked",),
+    424: ("failed_dependency", "dependency"),
+    425: ("unordered_collection", "unordered", "too_early"),
+    426: ("upgrade_required", "upgrade"),
+    428: ("precondition_required", "precondition"),
+    429: ("too_many_requests", "too_many"),
+    431: ("header_fields_too_large", "fields_too_large"),
+    444: ("no_response", "none"),
+    449: ("retry_with", "retry"),
+    450: ("blocked_by_windows_parental_controls", "parental_controls"),
+    451: ("unavailable_for_legal_reasons", "legal_reasons"),
+    499: ("client_closed_request",),
+    # Server Error.
+    500: ("internal_server_error", "server_error", "/o\\", "✗"),
+    501: ("not_implemented",),
+    502: ("bad_gateway",),
+    503: ("service_unavailable", "unavailable"),
+    504: ("gateway_timeout",),
+    505: ("http_version_not_supported", "http_version"),
+    506: ("variant_also_negotiates",),
+    507: ("insufficient_storage",),
+    509: ("bandwidth_limit_exceeded", "bandwidth"),
+    510: ("not_extended",),
+    511: ("network_authentication_required", "network_auth", "network_authentication"),
+}
+
+codes = LookupDict(name="status_codes")
+
+
+def _init():
+    for code, titles in _codes.items():
+        for title in titles:
+            setattr(codes, title, code)
+            if not title.startswith(("\\", "/")):
+                setattr(codes, title.upper(), code)
+
+    def doc(code):
+        names = ", ".join(f"``{n}``" for n in _codes[code])
+        return "* %d: %s" % (code, names)
+
+    global __doc__
+    __doc__ = (
+        __doc__ + "\n" + "\n".join(doc(code) for code in sorted(_codes))
+        if __doc__ is not None
+        else None
+    )
+
+
+_init()

src/requests/structures.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.structures
 ~~~~~~~~~~~~~~~~~~~
@@ -64,11 +62,7 @@ class CaseInsensitiveDict(MutableMapping):
 
     def lower_items(self):
         """Like iteritems(), but with all lowercase keys."""
-        return (
-            (lowerkey, keyval[1])
-            for (lowerkey, keyval)
-            in self._store.items()
-        )
+        return ((lowerkey, keyval[1]) for (lowerkey, keyval) in self._store.items())
 
     def __eq__(self, other):
         if isinstance(other, Mapping):
@@ -91,10 +85,10 @@ class LookupDict(dict):
 
     def __init__(self, name=None):
         self.name = name
-        super(LookupDict, self).__init__()
+        super().__init__()
 
     def __repr__(self):
-        return '<lookup \'%s\'>' % (self.name)
+        return f"<lookup '{self.name}'>"
 
     def __getitem__(self, key):
         # We allow fall-through here, so values default to None

src/requests/utils.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 """
 requests.utils
 ~~~~~~~~~~~~~~
@@ -20,28 +18,52 @@ import tempfile
 import warnings
 import zipfile
 from collections import OrderedDict
-from urllib3.util import make_headers
-from urllib3.util import parse_url
 
-from .__version__ import __version__
+from urllib3.util import make_headers, parse_url
+
 from . import certs
+from .__version__ import __version__
+
 # to_native_string is unused here, but imported here for backwards compatibility
-from ._internal_utils import to_native_string
+from ._internal_utils import (  # noqa: F401
+    _HEADER_VALIDATORS_BYTE,
+    _HEADER_VALIDATORS_STR,
+    HEADER_VALIDATORS,
+    to_native_string,
+)
+from .compat import (
+    Mapping,
+    basestring,
+    bytes,
+    getproxies,
+    getproxies_environment,
+    integer_types,
+    is_urllib3_1,
+)
 from .compat import parse_http_list as _parse_list_header
 from .compat import (
-    quote, urlparse, bytes, str, unquote, getproxies,
-    proxy_bypass, urlunparse, basestring, integer_types, is_py3,
-    proxy_bypass_environment, getproxies_environment, Mapping)
+    proxy_bypass,
+    proxy_bypass_environment,
+    quote,
+    str,
+    unquote,
+    urlparse,
+    urlunparse,
+)
 from .cookies import cookiejar_from_dict
-from .structures import CaseInsensitiveDict
 from .exceptions import (
-    InvalidURL, InvalidHeader, FileModeWarning, UnrewindableBodyError)
+    FileModeWarning,
+    InvalidHeader,
+    InvalidURL,
+    UnrewindableBodyError,
+)
+from .structures import CaseInsensitiveDict
 
-NETRC_FILES = ('.netrc', '_netrc')
+NETRC_FILES = (".netrc", "_netrc")
 
 DEFAULT_CA_BUNDLE_PATH = certs.where()
 
-DEFAULT_PORTS = {'http': 80, 'https': 443}
+DEFAULT_PORTS = {"http": 80, "https": 443}
 
 # Ensure that ', ' is used to preserve previous delimiter behavior.
 DEFAULT_ACCEPT_ENCODING = ", ".join(
@@ -49,28 +71,25 @@ DEFAULT_ACCEPT_ENCODING = ", ".join(
 )
 
 
-if sys.platform == 'win32':
+if sys.platform == "win32":
     # provide a proxy_bypass version on Windows without DNS lookups
 
     def proxy_bypass_registry(host):
         try:
-            if is_py3:
-                import winreg
-            else:
-                import _winreg as winreg
+            import winreg
         except ImportError:
             return False
 
         try:
-            internetSettings = winreg.OpenKey(winreg.HKEY_CURRENT_USER,
-                r'Software\Microsoft\Windows\CurrentVersion\Internet Settings')
+            internetSettings = winreg.OpenKey(
+                winreg.HKEY_CURRENT_USER,
+                r"Software\Microsoft\Windows\CurrentVersion\Internet Settings",
+            )
             # ProxyEnable could be REG_SZ or REG_DWORD, normalizing it
-            proxyEnable = int(winreg.QueryValueEx(internetSettings,
-                                              'ProxyEnable')[0])
+            proxyEnable = int(winreg.QueryValueEx(internetSettings, "ProxyEnable")[0])
             # ProxyOverride is almost always a string
-            proxyOverride = winreg.QueryValueEx(internetSettings,
-                                                'ProxyOverride')[0]
-        except OSError:
+            proxyOverride = winreg.QueryValueEx(internetSettings, "ProxyOverride")[0]
+        except (OSError, ValueError):
             return False
         if not proxyEnable or not proxyOverride:
             return False
@@ -78,15 +97,17 @@ if sys.platform == 'win32':
         # make a check value list from the registry entry: replace the
         # '<local>' string by the localhost entry and the corresponding
         # canonical entry.
-        proxyOverride = proxyOverride.split(';')
+        proxyOverride = proxyOverride.split(";")
+        # filter out empty strings to avoid re.match return true in the following code.
+        proxyOverride = filter(None, proxyOverride)
         # now check if we match one of the registry values.
         for test in proxyOverride:
-            if test == '<local>':
-                if '.' not in host:
+            if test == "<local>":
+                if "." not in host:
                     return True
-            test = test.replace(".", r"\.")     # mask dots
-            test = test.replace("*", r".*")     # change glob sequence
-            test = test.replace("?", r".")      # change glob char
+            test = test.replace(".", r"\.")  # mask dots
+            test = test.replace("*", r".*")  # change glob sequence
+            test = test.replace("?", r".")  # change glob char
             if re.match(test, host, re.I):
                 return True
         return False
@@ -106,7 +127,7 @@ if sys.platform == 'win32':
 def dict_to_sequence(d):
     """Returns an internal sequence dictionary update."""
 
-    if hasattr(d, 'items'):
+    if hasattr(d, "items"):
         d = d.items()
 
     return d
@@ -116,13 +137,18 @@ def super_len(o):
     total_length = None
     current_position = 0
 
-    if hasattr(o, '__len__'):
+    if not is_urllib3_1 and isinstance(o, str):
+        # urllib3 2.x+ treats all strings as utf-8 instead
+        # of latin-1 (iso-8859-1) like http.client.
+        o = o.encode("utf-8")
+
+    if hasattr(o, "__len__"):
         total_length = len(o)
 
-    elif hasattr(o, 'len'):
+    elif hasattr(o, "len"):
         total_length = o.len
 
-    elif hasattr(o, 'fileno'):
+    elif hasattr(o, "fileno"):
         try:
             fileno = o.fileno()
         except (io.UnsupportedOperation, AttributeError):
@@ -135,21 +161,23 @@ def super_len(o):
 
             # Having used fstat to determine the file length, we need to
             # confirm that this file was opened up in binary mode.
-            if 'b' not in o.mode:
-                warnings.warn((
-                    "Requests has determined the content-length for this "
-                    "request using the binary size of the file: however, the "
-                    "file has been opened in text mode (i.e. without the 'b' "
-                    "flag in the mode). This may lead to an incorrect "
-                    "content-length. In Requests 3.0, support will be removed "
-                    "for files in text mode."),
-                    FileModeWarning
+            if "b" not in o.mode:
+                warnings.warn(
+                    (
+                        "Requests has determined the content-length for this "
+                        "request using the binary size of the file: however, the "
+                        "file has been opened in text mode (i.e. without the 'b' "
+                        "flag in the mode). This may lead to an incorrect "
+                        "content-length. In Requests 3.0, support will be removed "
+                        "for files in text mode."
+                    ),
+                    FileModeWarning,
                 )
 
-    if hasattr(o, 'tell'):
+    if hasattr(o, "tell"):
         try:
             current_position = o.tell()
-        except (OSError, IOError):
+        except OSError:
             # This can happen in some weird situations, such as when the file
             # is actually a special file descriptor like stdin. In this
             # instance, we don't know what the length is, so set it to zero and
@@ -157,7 +185,7 @@ def super_len(o):
             if total_length is not None:
                 current_position = total_length
         else:
-            if hasattr(o, 'seek') and total_length is None:
+            if hasattr(o, "seek") and total_length is None:
                 # StringIO and BytesIO have seek but no usable fileno
                 try:
                     # seek to end of file
@@ -167,7 +195,7 @@ def super_len(o):
                     # seek back to current position to support
                     # partially read file-like objects
                     o.seek(current_position or 0)
-                except (OSError, IOError):
+                except OSError:
                     total_length = 0
 
     if total_length is None:
@@ -179,26 +207,19 @@ def super_len(o):
 def get_netrc_auth(url, raise_errors=False):
     """Returns the Requests tuple auth for a given url from netrc."""
 
-    netrc_file = os.environ.get('NETRC')
+    netrc_file = os.environ.get("NETRC")
     if netrc_file is not None:
         netrc_locations = (netrc_file,)
     else:
-        netrc_locations = ('~/{}'.format(f) for f in NETRC_FILES)
+        netrc_locations = (f"~/{f}" for f in NETRC_FILES)
 
     try:
-        from netrc import netrc, NetrcParseError
+        from netrc import NetrcParseError, netrc
 
         netrc_path = None
 
         for f in netrc_locations:
-            try:
-                loc = os.path.expanduser(f)
-            except KeyError:
-                # os.path.expanduser can fail when $HOME is undefined and
-                # getpwuid fails. See https://bugs.python.org/issue20164 &
-                # https://github.com/psf/requests/issues/1846
-                return
-
+            loc = os.path.expanduser(f)
             if os.path.exists(loc):
                 netrc_path = loc
                 break
@@ -208,21 +229,15 @@ def get_netrc_auth(url, raise_errors=False):
             return
 
         ri = urlparse(url)
-
-        # Strip port numbers from netloc. This weird `if...encode`` dance is
-        # used for Python 3.2, which doesn't support unicode literals.
-        splitstr = b':'
-        if isinstance(url, str):
-            splitstr = splitstr.decode('ascii')
-        host = ri.netloc.split(splitstr)[0]
+        host = ri.hostname
 
         try:
             _netrc = netrc(netrc_path).authenticators(host)
             if _netrc:
                 # Return with login / password
-                login_i = (0 if _netrc[0] else 1)
+                login_i = 0 if _netrc[0] else 1
                 return (_netrc[login_i], _netrc[2])
-        except (NetrcParseError, IOError):
+        except (NetrcParseError, OSError):
             # If there was a parsing error or a permissions issue reading the file,
             # we'll just skip netrc auth unless explicitly asked to raise errors.
             if raise_errors:
@@ -235,9 +250,8 @@ def get_netrc_auth(url, raise_errors=False):
 
 def guess_filename(obj):
     """Tries to guess the filename of the given object."""
-    name = getattr(obj, 'name', None)
-    if (name and isinstance(name, basestring) and name[0] != '<' and
-            name[-1] != '>'):
+    name = getattr(obj, "name", None)
+    if name and isinstance(name, basestring) and name[0] != "<" and name[-1] != ">":
         return os.path.basename(name)
 
 
@@ -259,7 +273,7 @@ def extract_zipped_paths(path):
             # If we don't check for an empty prefix after the split (in other words, archive remains unchanged after the split),
             # we _can_ end up in an infinite loop on a rare corner case affecting a small number of users
             break
-        member = '/'.join([prefix, member])
+        member = "/".join([prefix, member])
 
     if not zipfile.is_zipfile(archive):
         return path
@@ -270,7 +284,7 @@ def extract_zipped_paths(path):
 
     # we have a valid zip archive and a valid member of that archive
     tmp = tempfile.gettempdir()
-    extracted_path = os.path.join(tmp, member.split('/')[-1])
+    extracted_path = os.path.join(tmp, member.split("/")[-1])
     if not os.path.exists(extracted_path):
         # use read + write to avoid the creating nested folders, we only want the file, avoids mkdir racing condition
         with atomic_open(extracted_path) as file_handler:
@@ -281,12 +295,11 @@ def extract_zipped_paths(path):
 @contextlib.contextmanager
 def atomic_open(filename):
     """Write a file to the disk in an atomic fashion"""
-    replacer = os.rename if sys.version_info[0] == 2 else os.replace
     tmp_descriptor, tmp_name = tempfile.mkstemp(dir=os.path.dirname(filename))
     try:
-        with os.fdopen(tmp_descriptor, 'wb') as tmp_handler:
+        with os.fdopen(tmp_descriptor, "wb") as tmp_handler:
             yield tmp_handler
-        replacer(tmp_name, filename)
+        os.replace(tmp_name, filename)
     except BaseException:
         os.remove(tmp_name)
         raise
@@ -314,7 +327,7 @@ def from_key_val_list(value):
         return None
 
     if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
+        raise ValueError("cannot encode objects that are not 2-tuples")
 
     return OrderedDict(value)
 
@@ -340,7 +353,7 @@ def to_key_val_list(value):
         return None
 
     if isinstance(value, (str, bytes, bool, int)):
-        raise ValueError('cannot encode objects that are not 2-tuples')
+        raise ValueError("cannot encode objects that are not 2-tuples")
 
     if isinstance(value, Mapping):
         value = value.items()
@@ -405,10 +418,10 @@ def parse_dict_header(value):
     """
     result = {}
     for item in _parse_list_header(value):
-        if '=' not in item:
+        if "=" not in item:
             result[item] = None
             continue
-        name, value = item.split('=', 1)
+        name, value = item.split("=", 1)
         if value[:1] == value[-1:] == '"':
             value = unquote_header_value(value[1:-1])
         result[name] = value
@@ -436,8 +449,8 @@ def unquote_header_value(value, is_filename=False):
         # replace sequence below on a UNC path has the effect of turning
         # the leading double slash into a single slash and then
         # _fix_ie_filename() doesn't work correctly.  See #458.
-        if not is_filename or value[:2] != '\\\\':
-            return value.replace('\\\\', '\\').replace('\\"', '"')
+        if not is_filename or value[:2] != "\\\\":
+            return value.replace("\\\\", "\\").replace('\\"', '"')
     return value
 
 
@@ -448,11 +461,7 @@ def dict_from_cookiejar(cj):
     :rtype: dict
     """
 
-    cookie_dict = {}
-
-    for cookie in cj:
-        cookie_dict[cookie.name] = cookie.value
-
+    cookie_dict = {cookie.name: cookie.value for cookie in cj}
     return cookie_dict
 
 
@@ -472,19 +481,24 @@ def get_encodings_from_content(content):
 
     :param content: bytestring to extract encodings from.
     """
-    warnings.warn((
-        'In requests 3.0, get_encodings_from_content will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
+    warnings.warn(
+        (
+            "In requests 3.0, get_encodings_from_content will be removed. For "
+            "more information, please see the discussion on issue #2266. (This"
+            " warning should only appear once.)"
+        ),
+        DeprecationWarning,
+    )
 
     charset_re = re.compile(r'<meta.*?charset=["\']*(.+?)["\'>]', flags=re.I)
     pragma_re = re.compile(r'<meta.*?content=["\']*;?charset=(.+?)["\'>]', flags=re.I)
     xml_re = re.compile(r'^<\?xml.*?encoding=["\']*(.+?)["\'>]')
 
-    return (charset_re.findall(content) +
-            pragma_re.findall(content) +
-            xml_re.findall(content))
+    return (
+        charset_re.findall(content)
+        + pragma_re.findall(content)
+        + xml_re.findall(content)
+    )
 
 
 def _parse_content_type_header(header):
@@ -495,7 +509,7 @@ def _parse_content_type_header(header):
          parameters
     """
 
-    tokens = header.split(';')
+    tokens = header.split(";")
     content_type, params = tokens[0].strip(), tokens[1:]
     params_dict = {}
     items_to_strip = "\"' "
@@ -507,7 +521,7 @@ def _parse_content_type_header(header):
             index_of_equals = param.find("=")
             if index_of_equals != -1:
                 key = param[:index_of_equals].strip(items_to_strip)
-                value = param[index_of_equals + 1:].strip(items_to_strip)
+                value = param[index_of_equals + 1 :].strip(items_to_strip)
             params_dict[key.lower()] = value
     return content_type, params_dict
 
@@ -519,38 +533,37 @@ def get_encoding_from_headers(headers):
     :rtype: str
     """
 
-    content_type = headers.get('content-type')
+    content_type = headers.get("content-type")
 
     if not content_type:
         return None
 
     content_type, params = _parse_content_type_header(content_type)
 
-    if 'charset' in params:
-        return params['charset'].strip("'\"")
+    if "charset" in params:
+        return params["charset"].strip("'\"")
 
-    if 'text' in content_type:
-        return 'ISO-8859-1'
+    if "text" in content_type:
+        return "ISO-8859-1"
 
-    if 'application/json' in content_type:
+    if "application/json" in content_type:
         # Assume UTF-8 based on RFC 4627: https://www.ietf.org/rfc/rfc4627.txt since the charset was unset
-        return 'utf-8'
+        return "utf-8"
 
 
 def stream_decode_response_unicode(iterator, r):
-    """Stream decodes a iterator."""
+    """Stream decodes an iterator."""
 
     if r.encoding is None:
-        for item in iterator:
-            yield item
+        yield from iterator
         return
 
-    decoder = codecs.getincrementaldecoder(r.encoding)(errors='replace')
+    decoder = codecs.getincrementaldecoder(r.encoding)(errors="replace")
     for chunk in iterator:
         rv = decoder.decode(chunk)
         if rv:
             yield rv
-    rv = decoder.decode(b'', final=True)
+    rv = decoder.decode(b"", final=True)
     if rv:
         yield rv
 
@@ -561,7 +574,7 @@ def iter_slices(string, slice_length):
     if slice_length is None or slice_length <= 0:
         slice_length = len(string)
     while pos < len(string):
-        yield string[pos:pos + slice_length]
+        yield string[pos : pos + slice_length]
         pos += slice_length
 
 
@@ -577,11 +590,14 @@ def get_unicode_from_response(r):
 
     :rtype: str
     """
-    warnings.warn((
-        'In requests 3.0, get_unicode_from_response will be removed. For '
-        'more information, please see the discussion on issue #2266. (This'
-        ' warning should only appear once.)'),
-        DeprecationWarning)
+    warnings.warn(
+        (
+            "In requests 3.0, get_unicode_from_response will be removed. For "
+            "more information, please see the discussion on issue #2266. (This"
+            " warning should only appear once.)"
+        ),
+        DeprecationWarning,
+    )
 
     tried_encodings = []
 
@@ -596,14 +612,15 @@ def get_unicode_from_response(r):
 
     # Fall back:
     try:
-        return str(r.content, encoding, errors='replace')
+        return str(r.content, encoding, errors="replace")
     except TypeError:
         return r.content
 
 
 # The unreserved URI characters (RFC 3986)
 UNRESERVED_SET = frozenset(
-    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~")
+    "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz" + "0123456789-._~"
+)
 
 
 def unquote_unreserved(uri):
@@ -612,22 +629,22 @@ def unquote_unreserved(uri):
 
     :rtype: str
     """
-    parts = uri.split('%')
+    parts = uri.split("%")
     for i in range(1, len(parts)):
         h = parts[i][0:2]
         if len(h) == 2 and h.isalnum():
             try:
                 c = chr(int(h, 16))
             except ValueError:
-                raise InvalidURL("Invalid percent-escape sequence: '%s'" % h)
+                raise InvalidURL(f"Invalid percent-escape sequence: '{h}'")
 
             if c in UNRESERVED_SET:
                 parts[i] = c + parts[i][2:]
             else:
-                parts[i] = '%' + parts[i]
+                parts[i] = f"%{parts[i]}"
         else:
-            parts[i] = '%' + parts[i]
-    return ''.join(parts)
+            parts[i] = f"%{parts[i]}"
+    return "".join(parts)
 
 
 def requote_uri(uri):
@@ -660,10 +677,10 @@ def address_in_network(ip, net):
 
     :rtype: bool
     """
-    ipaddr = struct.unpack('=L', socket.inet_aton(ip))[0]
-    netaddr, bits = net.split('/')
-    netmask = struct.unpack('=L', socket.inet_aton(dotted_netmask(int(bits))))[0]
-    network = struct.unpack('=L', socket.inet_aton(netaddr))[0] & netmask
+    ipaddr = struct.unpack("=L", socket.inet_aton(ip))[0]
+    netaddr, bits = net.split("/")
+    netmask = struct.unpack("=L", socket.inet_aton(dotted_netmask(int(bits))))[0]
+    network = struct.unpack("=L", socket.inet_aton(netaddr))[0] & netmask
     return (ipaddr & netmask) == (network & netmask)
 
 
@@ -674,8 +691,8 @@ def dotted_netmask(mask):
 
     :rtype: str
     """
-    bits = 0xffffffff ^ (1 << 32 - mask) - 1
-    return socket.inet_ntoa(struct.pack('>I', bits))
+    bits = 0xFFFFFFFF ^ (1 << 32 - mask) - 1
+    return socket.inet_ntoa(struct.pack(">I", bits))
 
 
 def is_ipv4_address(string_ip):
@@ -684,7 +701,7 @@ def is_ipv4_address(string_ip):
     """
     try:
         socket.inet_aton(string_ip)
-    except socket.error:
+    except OSError:
         return False
     return True
 
@@ -695,9 +712,9 @@ def is_valid_cidr(string_network):
 
     :rtype: bool
     """
-    if string_network.count('/') == 1:
+    if string_network.count("/") == 1:
         try:
-            mask = int(string_network.split('/')[1])
+            mask = int(string_network.split("/")[1])
         except ValueError:
             return False
 
@@ -705,8 +722,8 @@ def is_valid_cidr(string_network):
             return False
 
         try:
-            socket.inet_aton(string_network.split('/')[0])
-        except socket.error:
+            socket.inet_aton(string_network.split("/")[0])
+        except OSError:
             return False
     else:
         return False
@@ -741,15 +758,17 @@ def should_bypass_proxies(url, no_proxy):
 
     :rtype: bool
     """
+
     # Prioritize lowercase environment variables over uppercase
     # to keep a consistent behaviour with other http projects (curl, wget).
-    get_proxy = lambda k: os.environ.get(k) or os.environ.get(k.upper())
+    def get_proxy(key):
+        return os.environ.get(key) or os.environ.get(key.upper())
 
     # First check whether no_proxy is defined. If it is, check that the URL
     # we're getting isn't in the no_proxy list.
     no_proxy_arg = no_proxy
     if no_proxy is None:
-        no_proxy = get_proxy('no_proxy')
+        no_proxy = get_proxy("no_proxy")
     parsed = urlparse(url)
 
     if parsed.hostname is None:
@@ -759,9 +778,7 @@ def should_bypass_proxies(url, no_proxy):
     if no_proxy:
         # We need to check whether we match here. We need to see if we match
         # the end of the hostname, both with and without the port.
-        no_proxy = (
-            host for host in no_proxy.replace(' ', '').split(',') if host
-        )
+        no_proxy = (host for host in no_proxy.replace(" ", "").split(",") if host)
 
         if is_ipv4_address(parsed.hostname):
             for proxy_ip in no_proxy:
@@ -775,7 +792,7 @@ def should_bypass_proxies(url, no_proxy):
         else:
             host_with_port = parsed.hostname
             if parsed.port:
-                host_with_port += ':{}'.format(parsed.port)
+                host_with_port += f":{parsed.port}"
 
             for host in no_proxy:
                 if parsed.hostname.endswith(host) or host_with_port.endswith(host):
@@ -783,7 +800,7 @@ def should_bypass_proxies(url, no_proxy):
                     # to apply the proxies on this URL.
                     return True
 
-    with set_environ('no_proxy', no_proxy_arg):
+    with set_environ("no_proxy", no_proxy_arg):
         # parsed.hostname can be `None` in cases such as a file URI.
         try:
             bypass = proxy_bypass(parsed.hostname)
@@ -817,13 +834,13 @@ def select_proxy(url, proxies):
     proxies = proxies or {}
     urlparts = urlparse(url)
     if urlparts.hostname is None:
-        return proxies.get(urlparts.scheme, proxies.get('all'))
+        return proxies.get(urlparts.scheme, proxies.get("all"))
 
     proxy_keys = [
-        urlparts.scheme + '://' + urlparts.hostname,
+        urlparts.scheme + "://" + urlparts.hostname,
         urlparts.scheme,
-        'all://' + urlparts.hostname,
-        'all',
+        "all://" + urlparts.hostname,
+        "all",
     ]
     proxy = None
     for proxy_key in proxy_keys:
@@ -837,7 +854,7 @@ def select_proxy(url, proxies):
 def resolve_proxies(request, proxies, trust_env=True):
     """This method takes proxy information from a request and configuration
     input to resolve a mapping of target proxies. This will consider settings
-    such a NO_PROXY to strip proxy configurations.
+    such as NO_PROXY to strip proxy configurations.
 
     :param request: Request or PreparedRequest
     :param proxies: A dictionary of schemes or schemes and hosts to proxy URLs
@@ -848,13 +865,13 @@ def resolve_proxies(request, proxies, trust_env=True):
     proxies = proxies if proxies is not None else {}
     url = request.url
     scheme = urlparse(url).scheme
-    no_proxy = proxies.get('no_proxy')
+    no_proxy = proxies.get("no_proxy")
     new_proxies = proxies.copy()
 
     if trust_env and not should_bypass_proxies(url, no_proxy=no_proxy):
         environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
 
-        proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
+        proxy = environ_proxies.get(scheme, environ_proxies.get("all"))
 
         if proxy:
             new_proxies.setdefault(scheme, proxy)
@@ -867,19 +884,21 @@ def default_user_agent(name="python-requests"):
 
     :rtype: str
     """
-    return '%s/%s' % (name, __version__)
+    return f"{name}/{__version__}"
 
 
 def default_headers():
     """
     :rtype: requests.structures.CaseInsensitiveDict
     """
-    return CaseInsensitiveDict({
-        'User-Agent': default_user_agent(),
-        'Accept-Encoding': DEFAULT_ACCEPT_ENCODING,
-        'Accept': '*/*',
-        'Connection': 'keep-alive',
-    })
+    return CaseInsensitiveDict(
+        {
+            "User-Agent": default_user_agent(),
+            "Accept-Encoding": DEFAULT_ACCEPT_ENCODING,
+            "Accept": "*/*",
+            "Connection": "keep-alive",
+        }
+    )
 
 
 def parse_header_links(value):
@@ -892,23 +911,23 @@ def parse_header_links(value):
 
     links = []
 
-    replace_chars = ' \'"'
+    replace_chars = " '\""
 
     value = value.strip(replace_chars)
     if not value:
         return links
 
-    for val in re.split(', *<', value):
+    for val in re.split(", *<", value):
         try:
-            url, params = val.split(';', 1)
+            url, params = val.split(";", 1)
         except ValueError:
-            url, params = val, ''
+            url, params = val, ""
 
-        link = {'url': url.strip('<> \'"')}
+        link = {"url": url.strip("<> '\"")}
 
-        for param in params.split(';'):
+        for param in params.split(";"):
             try:
-                key, value = param.split('=')
+                key, value = param.split("=")
             except ValueError:
                 break
 
@@ -920,7 +939,7 @@ def parse_header_links(value):
 
 
 # Null bytes; no need to recreate these on each call to guess_json_utf
-_null = '\x00'.encode('ascii')  # encoding to ASCII for Python 3
+_null = "\x00".encode("ascii")  # encoding to ASCII for Python 3
 _null2 = _null * 2
 _null3 = _null * 3
 
@@ -934,25 +953,25 @@ def guess_json_utf(data):
     # determine the encoding. Also detect a BOM, if present.
     sample = data[:4]
     if sample in (codecs.BOM_UTF32_LE, codecs.BOM_UTF32_BE):
-        return 'utf-32'     # BOM included
+        return "utf-32"  # BOM included
     if sample[:3] == codecs.BOM_UTF8:
-        return 'utf-8-sig'  # BOM included, MS style (discouraged)
+        return "utf-8-sig"  # BOM included, MS style (discouraged)
     if sample[:2] in (codecs.BOM_UTF16_LE, codecs.BOM_UTF16_BE):
-        return 'utf-16'     # BOM included
+        return "utf-16"  # BOM included
     nullcount = sample.count(_null)
     if nullcount == 0:
-        return 'utf-8'
+        return "utf-8"
     if nullcount == 2:
-        if sample[::2] == _null2:   # 1st and 3rd are null
-            return 'utf-16-be'
+        if sample[::2] == _null2:  # 1st and 3rd are null
+            return "utf-16-be"
         if sample[1::2] == _null2:  # 2nd and 4th are null
-            return 'utf-16-le'
+            return "utf-16-le"
         # Did not detect 2 valid UTF-16 ascii-range characters
     if nullcount == 3:
         if sample[:3] == _null3:
-            return 'utf-32-be'
+            return "utf-32-be"
         if sample[1:] == _null3:
-            return 'utf-32-le'
+            return "utf-32-le"
         # Did not detect a valid UTF-32 ascii-range character
     return None
 
@@ -977,13 +996,13 @@ def prepend_scheme_if_needed(url, new_scheme):
     if auth:
         # parse_url doesn't provide the netloc with auth
         # so we'll add it ourselves.
-        netloc = '@'.join([auth, netloc])
+        netloc = "@".join([auth, netloc])
     if scheme is None:
         scheme = new_scheme
     if path is None:
-        path = ''
+        path = ""
 
-    return urlunparse((scheme, netloc, path, '', query, fragment))
+    return urlunparse((scheme, netloc, path, "", query, fragment))
 
 
 def get_auth_from_url(url):
@@ -997,35 +1016,39 @@ def get_auth_from_url(url):
     try:
         auth = (unquote(parsed.username), unquote(parsed.password))
     except (AttributeError, TypeError):
-        auth = ('', '')
+        auth = ("", "")
 
     return auth
 
 
-# Moved outside of function to avoid recompile every call
-_CLEAN_HEADER_REGEX_BYTE = re.compile(b'^\\S[^\\r\\n]*$|^$')
-_CLEAN_HEADER_REGEX_STR = re.compile(r'^\S[^\r\n]*$|^$')
-
-
 def check_header_validity(header):
-    """Verifies that header value is a string which doesn't contain
-    leading whitespace or return characters. This prevents unintended
-    header injection.
+    """Verifies that header parts don't contain leading whitespace
+    reserved characters, or return characters.
 
     :param header: tuple, in the format (name, value).
     """
     name, value = header
+    _validate_header_part(header, name, 0)
+    _validate_header_part(header, value, 1)
 
-    if isinstance(value, bytes):
-        pat = _CLEAN_HEADER_REGEX_BYTE
+
+def _validate_header_part(header, header_part, header_validator_index):
+    if isinstance(header_part, str):
+        validator = _HEADER_VALIDATORS_STR[header_validator_index]
+    elif isinstance(header_part, bytes):
+        validator = _HEADER_VALIDATORS_BYTE[header_validator_index]
     else:
-        pat = _CLEAN_HEADER_REGEX_STR
-    try:
-        if not pat.match(value):
-            raise InvalidHeader("Invalid return character or leading space in header: %s" % name)
-    except TypeError:
-        raise InvalidHeader("Value for header {%s: %s} must be of type str or "
-                            "bytes, not %s" % (name, value, type(value)))
+        raise InvalidHeader(
+            f"Header part ({header_part!r}) from {header} "
+            f"must be of type str or bytes, not {type(header_part)}"
+        )
+
+    if not validator.match(header_part):
+        header_kind = "name" if header_validator_index == 0 else "value"
+        raise InvalidHeader(
+            f"Invalid leading whitespace, reserved character(s), or return "
+            f"character(s) in header {header_kind}: {header_part!r}"
+        )
 
 
 def urldefragauth(url):
@@ -1040,21 +1063,24 @@ def urldefragauth(url):
     if not netloc:
         netloc, path = path, netloc
 
-    netloc = netloc.rsplit('@', 1)[-1]
+    netloc = netloc.rsplit("@", 1)[-1]
 
-    return urlunparse((scheme, netloc, path, params, query, ''))
+    return urlunparse((scheme, netloc, path, params, query, ""))
 
 
 def rewind_body(prepared_request):
     """Move file pointer back to its recorded starting position
     so it can be read again on redirect.
     """
-    body_seek = getattr(prepared_request.body, 'seek', None)
-    if body_seek is not None and isinstance(prepared_request._body_position, integer_types):
+    body_seek = getattr(prepared_request.body, "seek", None)
+    if body_seek is not None and isinstance(
+        prepared_request._body_position, integer_types
+    ):
         try:
             body_seek(prepared_request._body_position)
-        except (IOError, OSError):
-            raise UnrewindableBodyError("An error occurred when rewinding request "
-                                        "body for redirect.")
+        except OSError:
+            raise UnrewindableBodyError(
+                "An error occurred when rewinding request body for redirect."
+            )
     else:
         raise UnrewindableBodyError("Unable to rewind request body for redirect.")

tests/__init__.py

@@ -1,13 +1,14 @@
-# -*- coding: utf-8 -*-
-
 """Requests test package initialisation."""
 
 import warnings
 
-import urllib3
-from urllib3.exceptions import SNIMissingWarning
+try:
+    from urllib3.exceptions import SNIMissingWarning
 
-# urllib3 sets SNIMissingWarning to only go off once,
-# while this test suite requires it to always fire
-# so that it occurs during test_requests.test_https_warnings
-warnings.simplefilter('always', SNIMissingWarning)
+    # urllib3 1.x sets SNIMissingWarning to only go off once,
+    # while this test suite requires it to always fire
+    # so that it occurs during test_requests.test_https_warnings
+    warnings.simplefilter("always", SNIMissingWarning)
+except ImportError:
+    # urllib3 2.0 removed that warning and errors out instead
+    SNIMissingWarning = None

tests/certs/README.md

@@ -0,0 +1,10 @@
+# Testing Certificates
+
+This is a collection of certificates useful for testing aspects of Requests'
+behaviour.
+
+The certificates include:
+
+* [expired](./expired) server certificate with a valid certificate authority
+* [mtls](./mtls) provides a valid client certificate with a 2 year validity
+* [valid](./valid) has a valid server certificate

tests/certs/expired/Makefile

@@ -0,0 +1,13 @@
+.PHONY: all clean ca server
+
+ca:
+	make -C $@ all
+
+server:
+	make -C $@ all
+
+all: ca server
+
+clean:
+	make -C ca clean
+	make -C server clean

tests/certs/expired/README.md

@@ -0,0 +1,11 @@
+# Expired Certificates and Configuration for Testing
+
+This has a valid certificate authority in [ca](./ca) and an invalid server
+certificate in [server](./server).
+
+This can all be regenerated with:
+
+```
+make clean
+make all
+```

tests/certs/expired/ca/Makefile

@@ -0,0 +1,13 @@
+.PHONY: all clean
+
+root_files = ca-private.key ca.crt
+
+ca-private.key:
+	openssl genrsa -out ca-private.key 2048
+
+all: ca-private.key
+	openssl req -x509 -sha256 -days 7300 -key ca-private.key -out ca.crt -config ca.cnf
+	ln -s ca.crt cacert.pem
+
+clean:
+	rm -f cacert.pem ca.crt ca-private.key *.csr

tests/certs/expired/ca/ca-private.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEuwIBADANBgkqhkiG9w0BAQEFAASCBKUwggShAgEAAoIBAQCfZUh82dF/r9GW
+89IN2vqOiMMuikIAO3SEI3+uSGCdWT13C+NnrFJ7XF/D6UGy1mvm8KfhSnapWoAk
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+dyfeA6HHeRAHx8VRGpL6
+-----END PRIVATE KEY-----

tests/certs/expired/ca/ca.cnf

@@ -0,0 +1,17 @@
+[req]
+default_bits = 2048
+prompt = no
+default_md = sha256
+encrypt_key = no
+distinguished_name = dn
+x509_extensions = v3_ca
+
+[dn]
+C = US                            # country code
+O = Python Software Foundation    # organization
+OU = python-requests              # organization unit/department
+CN = Self-Signed Root CA          # common name / your cert name
+
+[v3_ca]
+basicConstraints = critical, CA:true
+keyUsage = critical, cRLSign, digitalSignature, keyCertSign

tests/certs/expired/ca/ca.crt

@@ -0,0 +1,22 @@
+-----BEGIN CERTIFICATE-----
+MIIDpDCCAoygAwIBAgIUQt0yyZmppkHKNx4aXRrmD5tvjbswDQYJKoZIhvcNAQEL
+BQAwajELMAkGA1UEBhMCVVMxIzAhBgNVBAoMGlB5dGhvbiBTb2Z0d2FyZSBGb3Vu
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+CojmhIobDa2NuF81Jx6Cc7lagCPG3/Ts
+-----END CERTIFICATE-----

tests/certs/expired/ca/ca.srl

@@ -0,0 +1 @@
+4F36C3A7E075BA6452D10EEB81E7F189FF489B83

tests/certs/expired/server/Makefile

@@ -0,0 +1,16 @@
+.PHONY: all clean
+
+server.key:
+	openssl genrsa -out $@ 2048
+
+server.csr: server.key
+	openssl req -key $< -new -out $@ -config cert.cnf
+
+server.pem: server.csr
+	openssl x509 -req -CA ../ca/ca.crt -CAkey ../ca/ca-private.key -in server.csr -outform PEM -out server.pem -days 0 -CAcreateserial
+	openssl x509 -in ../ca/ca.crt -outform PEM >> $@
+
+all: server.pem
+
+clean:
+	rm -f server.*

tests/certs/expired/server/cert.cnf

@@ -0,0 +1,24 @@
+[req]
+req_extensions = v3_req
+distinguished_name = req_distinguished_name
+prompt=no
+
+[req_distinguished_name]
+C = US
+ST = DE
+O = Python Software Foundation
+OU = python-requests
+CN = localhost
+
+[v3_req]
+# Extensions to add to a certificate request
+basicConstraints = CA:FALSE
+keyUsage = digitalSignature, keyEncipherment
+extendedKeyUsage = serverAuth
+subjectAltName = @alt_names
+
+[alt_names]
+DNS.1 = *.localhost
+DNS.1 = localhost
+IP.1 = 127.0.0.1
+IP.2 = ::1

tests/certs/expired/server/server.csr

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIDHjCCAgYCAQAwbTELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAkRFMSMwIQYDVQQK
+DBpQeXRob24gU29mdHdhcmUgRm91bmRhdGlvbjEYMBYGA1UECwwPcHl0aG9uLXJl
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+-----END CERTIFICATE REQUEST-----

tests/certs/expired/server/server.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
+MIIEvQIBADANBgkqhkiG9w0BAQEFAASCBKcwggSjAgEAAoIBAQDcRRwk8IU1YoNu
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+kmnbborcfh74fkfRcwXm6G8=
+-----END PRIVATE KEY-----

tests/certs/expired/server/server.pem

@@ -0,0 +1,44 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+KOWpOS3fbsI=
+-----END CERTIFICATE-----

tests/certs/mtls/Makefile

@@ -0,0 +1,7 @@
+.PHONY: all clean
+
+all:
+	make -C client all
+
+clean:
+	make -C client clean

tests/certs/mtls/README.md

@@ -0,0 +1,4 @@
+# Certificate Examples for mTLS
+
+This has some generated certificates for mTLS utilization. The idea is to be
+able to have testing around how Requests handles client certificates.

tests/certs/mtls/client/Makefile

@@ -0,0 +1,16 @@
+.PHONY: all clean
+
+client.key:
+	openssl genrsa -out $@ 2048
+
+client.csr: client.key
+	openssl req -key $< -new -out $@ -config cert.cnf
+
+client.pem: client.csr
+	openssl x509 -req -CA ./ca/ca.crt -CAkey ./ca/ca-private.key -in client.csr -outform PEM -out client.pem -days 730 -CAcreateserial
+	openssl x509 -in ./ca/ca.crt -outform PEM >> $@
+
+all: client.pem
+
+clean:
+	rm -f client.*

tests/certs/mtls/client/ca

@@ -0,0 +1 @@
+../../expired/ca/

tests/certs/mtls/client/cert.cnf

@@ -0,0 +1,26 @@
+[req]
+req_extensions = v3_req
+distinguished_name = req_distinguished_name
+prompt=no
+
+[req_distinguished_name]
+C = US
+ST = DE
+O = Python Software Foundation
+OU = python-requests
+CN = requests
+
+[v3_req]
+# Extensions to add to a certificate request
+basicConstraints = CA:FALSE
+keyUsage = digitalSignature, keyEncipherment
+extendedKeyUsage = clientAuth
+subjectAltName = @alt_names
+
+[alt_names]
+DNS.1 = *.localhost
+IP.1 = 127.0.0.1
+IP.2 = ::1
+URI.1 = spiffe://trust.python.org/v0/maintainer/sigmavirus24/project/requests/org/psf
+URI.2 = spiffe://trust.python.org/v1/maintainer:sigmavirus24/project:requests/org:psf
+URI.3 = spiffe://trust.python.org/v1/maintainer=sigmavirus24/project=requests/org=psf

tests/certs/mtls/client/client.csr

@@ -0,0 +1,24 @@
+-----BEGIN CERTIFICATE REQUEST-----
+MIIEGjCCAwICAQAwbDELMAkGA1UEBhMCVVMxCzAJBgNVBAgMAkRFMSMwIQYDVQQK
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+-----END CERTIFICATE REQUEST-----

tests/certs/mtls/client/client.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+vC0zZrsQWCYT4Wbm7gcOOAU=
+-----END PRIVATE KEY-----

tests/certs/mtls/client/client.pem

@@ -0,0 +1,44 @@
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----
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+-----END CERTIFICATE-----

tests/certs/valid/ca

@@ -0,0 +1 @@
+../expired/ca

tests/certs/valid/server/Makefile

@@ -0,0 +1,16 @@
+.PHONY: all clean
+
+server.key:
+	openssl genrsa -out $@ 2048
+
+server.csr: server.key
+	openssl req -key $< -config cert.cnf -new -out $@
+
+server.pem: server.csr
+	openssl x509 -req -CA ../ca/ca.crt -CAkey ../ca/ca-private.key -in server.csr -outform PEM -out server.pem -extfile cert.cnf -extensions v3_ca -days 7200 -CAcreateserial
+	openssl x509 -in ../ca/ca.crt -outform PEM >> $@
+
+all: server.pem
+
+clean:
+	rm -f server.*

tests/certs/valid/server/cert.cnf

@@ -0,0 +1,31 @@
+[req]
+req_extensions = v3_req
+distinguished_name = req_distinguished_name
+prompt=no
+
+[req_distinguished_name]
+C = US
+ST = DE
+O = Python Software Foundation
+OU = python-requests
+CN = localhost
+
+[v3_req]
+# Extensions to add to a certificate request
+basicConstraints = critical, CA:FALSE
+keyUsage = critical, digitalSignature, keyEncipherment
+extendedKeyUsage = critical, serverAuth
+subjectAltName = critical, @alt_names
+
+[v3_ca]
+# Extensions to add to a certificate request
+basicConstraints = critical, CA:FALSE
+keyUsage = critical, digitalSignature, keyEncipherment
+extendedKeyUsage = critical, serverAuth
+subjectAltName = critical, @alt_names
+
+[alt_names]
+DNS.1 = *.localhost
+DNS.1 = localhost
+IP.1 = 127.0.0.1
+IP.2 = ::1

tests/certs/valid/server/server.csr

@@ -0,0 +1,19 @@
+-----BEGIN CERTIFICATE REQUEST-----
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+-----END CERTIFICATE REQUEST-----

tests/certs/valid/server/server.key

@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----
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+BElBKCLp6iYqpElWyKTj39LCnLhzRICyYQpblM8zZgtQIvRGT8DYh2HA1Q29yPzt
+Rgrz9yfFACdT5gUM5D6sx7L37xbtMQQ7YYOxEAfCUZ0qnMJgpNTJ8/ECkjGJZaif
+CXrx6XCdvrM/evZW2JZbyg==
+-----END PRIVATE KEY-----

tests/certs/valid/server/server.pem

@@ -0,0 +1,46 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----

tests/compat.py

@@ -1,7 +1,4 @@
-# -*- coding: utf-8 -*-
-
-from requests.compat import is_py3
-
+import warnings
 
 try:
     import StringIO
@@ -13,9 +10,14 @@ try:
 except ImportError:
     cStringIO = None
 
-if is_py3:
-    def u(s):
-        return s
-else:
-    def u(s):
-        return s.decode('unicode-escape')
+
+def u(s):
+    warnings.warn(
+        (
+            "This helper function is no longer relevant in Python 3. "
+            "Usage of this alias should be discontinued as it will be "
+            "removed in a future release of Requests."
+        ),
+        DeprecationWarning,
+    )
+    return s

tests/conftest.py

@@ -1,26 +1,23 @@
-# -*- coding: utf-8 -*-
-
 try:
-    from http.server import HTTPServer
-    from http.server import SimpleHTTPRequestHandler
+    from http.server import HTTPServer, SimpleHTTPRequestHandler
 except ImportError:
     from BaseHTTPServer import HTTPServer
-    from SimpleHTTPServer import SimpleHTTPRequestHandler 
+    from SimpleHTTPServer import SimpleHTTPRequestHandler
 
 import ssl
-import tempfile
 import threading
 
 import pytest
+
 from requests.compat import urljoin
 
 
 def prepare_url(value):
     # Issue #1483: Make sure the URL always has a trailing slash
-    httpbin_url = value.url.rstrip('/') + '/'
+    httpbin_url = value.url.rstrip("/") + "/"
 
     def inner(*suffix):
-        return urljoin(httpbin_url, '/'.join(suffix))
+        return urljoin(httpbin_url, "/".join(suffix))
 
     return inner
 
@@ -44,7 +41,7 @@ def nosan_server(tmp_path_factory):
     tmpdir = tmp_path_factory.mktemp("certs")
     ca = trustme.CA()
     # only commonName, no subjectAltName
-    server_cert = ca.issue_cert(common_name=u"localhost")
+    server_cert = ca.issue_cert(common_name="localhost")
     ca_bundle = str(tmpdir / "ca.pem")
     ca.cert_pem.write_to_path(ca_bundle)
 

tests/test_adapters.py

@@ -0,0 +1,8 @@
+import requests.adapters
+
+
+def test_request_url_trims_leading_path_separators():
+    """See also https://github.com/psf/requests/issues/6643."""
+    a = requests.adapters.HTTPAdapter()
+    p = requests.Request(method="GET", url="http://127.0.0.1:10000//v:h").prepare()
+    assert "/v:h" == a.request_url(p, {})

tests/test_help.py

@@ -1,31 +1,27 @@
-# -*- encoding: utf-8
-
-import sys
-
-import pytest
+from unittest import mock
 
 from requests.help import info
 
 
 def test_system_ssl():
     """Verify we're actually setting system_ssl when it should be available."""
-    assert info()['system_ssl']['version'] != ''
+    assert info()["system_ssl"]["version"] != ""
 
 
-class VersionedPackage(object):
+class VersionedPackage:
     def __init__(self, version):
         self.__version__ = version
 
 
-def test_idna_without_version_attribute(mocker):
+def test_idna_without_version_attribute():
     """Older versions of IDNA don't provide a __version__ attribute, verify
     that if we have such a package, we don't blow up.
     """
-    mocker.patch('requests.help.idna', new=None)
-    assert info()['idna'] == {'version': ''}
+    with mock.patch("requests.help.idna", new=None):
+        assert info()["idna"] == {"version": ""}
 
 
-def test_idna_with_version_attribute(mocker):
+def test_idna_with_version_attribute():
     """Verify we're actually setting idna version when it should be available."""
-    mocker.patch('requests.help.idna', new=VersionedPackage('2.6'))
-    assert info()['idna'] == {'version': '2.6'}
+    with mock.patch("requests.help.idna", new=VersionedPackage("2.6")):
+        assert info()["idna"] == {"version": "2.6"}

tests/test_hooks.py

@@ -1,5 +1,3 @@
-# -*- coding: utf-8 -*-
-
 import pytest
 
 from requests import hooks
@@ -10,14 +8,15 @@ def hook(value):
 
 
 @pytest.mark.parametrize(
-    'hooks_list, result', (
-        (hook, 'ata'),
-        ([hook, lambda x: None, hook], 'ta'),
-    )
+    "hooks_list, result",
+    (
+        (hook, "ata"),
+        ([hook, lambda x: None, hook], "ta"),
+    ),
 )
 def test_hooks(hooks_list, result):
-    assert hooks.dispatch_hook('response', {'response': hooks_list}, 'Data') == result
+    assert hooks.dispatch_hook("response", {"response": hooks_list}, "Data") == result
 
 
 def test_default_hooks():
-    assert hooks.default_hooks() == {'response': []}
+    assert hooks.default_hooks() == {"response": []}

tests/test_lowlevel.py

@@ -1,11 +1,11 @@
-# -*- coding: utf-8 -*-
+import threading
 
 import pytest
-import threading
-import requests
-
 from tests.testserver.server import Server, consume_socket_content
 
+import requests
+from requests.compat import JSONDecodeError
+
 from .utils import override_environ
 
 
@@ -14,9 +14,9 @@ def echo_response_handler(sock):
     request_content = consume_socket_content(sock, timeout=0.5)
 
     text_200 = (
-        b'HTTP/1.1 200 OK\r\n'
-        b'Content-Length: %d\r\n\r\n'
-        b'%s'
+        b"HTTP/1.1 200 OK\r\n"
+        b"Content-Length: %d\r\n\r\n"
+        b"%s"
     ) % (len(request_content), request_content)
     sock.send(text_200)
 
@@ -25,15 +25,15 @@ def test_chunked_upload():
     """can safely send generators"""
     close_server = threading.Event()
     server = Server.basic_response_server(wait_to_close_event=close_server)
-    data = iter([b'a', b'b', b'c'])
+    data = iter([b"a", b"b", b"c"])
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f"http://{host}:{port}/"
         r = requests.post(url, data=data, stream=True)
         close_server.set()  # release server block
 
     assert r.status_code == 200
-    assert r.request.headers['Transfer-Encoding'] == 'chunked'
+    assert r.request.headers["Transfer-Encoding"] == "chunked"
 
 
 def test_chunked_encoding_error():
@@ -43,8 +43,10 @@ def test_chunked_encoding_error():
         request_content = consume_socket_content(sock, timeout=0.5)
 
         # The server never ends the request and doesn't provide any valid chunks
-        sock.send(b"HTTP/1.1 200 OK\r\n" +
-                  b"Transfer-Encoding: chunked\r\n")
+        sock.send(
+            b"HTTP/1.1 200 OK\r\n"
+            b"Transfer-Encoding: chunked\r\n"
+        )
 
         return request_content
 
@@ -52,9 +54,9 @@ def test_chunked_encoding_error():
     server = Server(incomplete_chunked_response_handler)
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f"http://{host}:{port}/"
         with pytest.raises(requests.exceptions.ChunkedEncodingError):
-            r = requests.get(url)
+            requests.get(url)
         close_server.set()  # release server block
 
 
@@ -63,17 +65,17 @@ def test_chunked_upload_uses_only_specified_host_header():
     close_server = threading.Event()
     server = Server(echo_response_handler, wait_to_close_event=close_server)
 
-    data = iter([b'a', b'b', b'c'])
-    custom_host = 'sample-host'
+    data = iter([b"a", b"b", b"c"])
+    custom_host = "sample-host"
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
-        r = requests.post(url, data=data, headers={'Host': custom_host}, stream=True)
+        url = f"http://{host}:{port}/"
+        r = requests.post(url, data=data, headers={"Host": custom_host}, stream=True)
         close_server.set()  # release server block
 
-    expected_header = b'Host: %s\r\n' % custom_host.encode('utf-8')
+    expected_header = b"Host: %s\r\n" % custom_host.encode("utf-8")
     assert expected_header in r.content
-    assert r.content.count(b'Host: ') == 1
+    assert r.content.count(b"Host: ") == 1
 
 
 def test_chunked_upload_doesnt_skip_host_header():
@@ -81,17 +83,17 @@ def test_chunked_upload_doesnt_skip_host_header():
     close_server = threading.Event()
     server = Server(echo_response_handler, wait_to_close_event=close_server)
 
-    data = iter([b'a', b'b', b'c'])
+    data = iter([b"a", b"b", b"c"])
 
     with server as (host, port):
-        expected_host = '{}:{}'.format(host, port)
-        url = 'http://{}:{}/'.format(host, port)
+        expected_host = f"{host}:{port}"
+        url = f"http://{host}:{port}/"
         r = requests.post(url, data=data, stream=True)
         close_server.set()  # release server block
 
-    expected_header = b'Host: %s\r\n' % expected_host.encode('utf-8')
+    expected_header = b"Host: %s\r\n" % expected_host.encode("utf-8")
     assert expected_header in r.content
-    assert r.content.count(b'Host: ') == 1
+    assert r.content.count(b"Host: ") == 1
 
 
 def test_conflicting_content_lengths():
@@ -101,12 +103,14 @@ def test_conflicting_content_lengths():
 
     def multiple_content_length_response_handler(sock):
         request_content = consume_socket_content(sock, timeout=0.5)
-
-        sock.send(b"HTTP/1.1 200 OK\r\n" +
-                  b"Content-Type: text/plain\r\n" +
-                  b"Content-Length: 16\r\n" +
-                  b"Content-Length: 32\r\n\r\n" +
-                  b"-- Bad Actor -- Original Content\r\n")
+        response = (
+            b"HTTP/1.1 200 OK\r\n"
+            b"Content-Type: text/plain\r\n"
+            b"Content-Length: 16\r\n"
+            b"Content-Length: 32\r\n\r\n"
+            b"-- Bad Actor -- Original Content\r\n"
+        )
+        sock.send(response)
 
         return request_content
 
@@ -114,9 +118,9 @@ def test_conflicting_content_lengths():
     server = Server(multiple_content_length_response_handler)
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f"http://{host}:{port}/"
         with pytest.raises(requests.exceptions.InvalidHeader):
-            r = requests.get(url)
+            requests.get(url)
         close_server.set()
 
 
@@ -173,7 +177,7 @@ def test_digestauth_401_count_reset_on_redirect():
     server = Server(digest_response_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f'http://{host}:{port}/'
         r = requests.get(url, auth=auth)
         # Verify server succeeded in authenticating.
         assert r.status_code == 200
@@ -223,7 +227,7 @@ def test_digestauth_401_only_sent_once():
     server = Server(digest_failed_response_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f'http://{host}:{port}/'
         r = requests.get(url, auth=auth)
         # Verify server didn't authenticate us.
         assert r.status_code == 401
@@ -260,7 +264,7 @@ def test_digestauth_only_on_4xx():
     server = Server(digest_response_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = 'http://{}:{}/'.format(host, port)
+        url = f'http://{host}:{port}/'
         r = requests.get(url, auth=auth)
         # Verify server didn't receive auth from us.
         assert r.status_code == 200
@@ -277,17 +281,17 @@ _schemes_by_var_prefix = [
 _proxy_combos = []
 for prefix, schemes in _schemes_by_var_prefix:
     for scheme in schemes:
-        _proxy_combos.append(("{}_proxy".format(prefix), scheme))
+        _proxy_combos.append((f"{prefix}_proxy", scheme))
 
 _proxy_combos += [(var.upper(), scheme) for var, scheme in _proxy_combos]
 
 
 @pytest.mark.parametrize("var,scheme", _proxy_combos)
 def test_use_proxy_from_environment(httpbin, var, scheme):
-    url = "{}://httpbin.org".format(scheme)
+    url = f"{scheme}://httpbin.org"
     fake_proxy = Server()  # do nothing with the requests; just close the socket
     with fake_proxy as (host, port):
-        proxy_url = "socks5://{}:{}".format(host, port)
+        proxy_url = f"socks5://{host}:{port}"
         kwargs = {var: proxy_url}
         with override_environ(**kwargs):
             # fake proxy's lack of response will cause a ConnectionError
@@ -302,18 +306,20 @@ def test_use_proxy_from_environment(httpbin, var, scheme):
 
 
 def test_redirect_rfc1808_to_non_ascii_location():
-    path = u'š'
+    path = 'š'
     expected_path = b'%C5%A1'
     redirect_request = []  # stores the second request to the server
 
     def redirect_resp_handler(sock):
         consume_socket_content(sock, timeout=0.5)
-        location = u'//{}:{}/{}'.format(host, port, path)
+        location = f'//{host}:{port}/{path}'
         sock.send(
-            b'HTTP/1.1 301 Moved Permanently\r\n'
-            b'Content-Length: 0\r\n'
-            b'Location: ' + location.encode('utf8') + b'\r\n'
-            b'\r\n'
+            (
+                b'HTTP/1.1 301 Moved Permanently\r\n'
+                b'Content-Length: 0\r\n'
+                b'Location: %s\r\n'
+                b'\r\n'
+            ) % location.encode('utf8')
         )
         redirect_request.append(consume_socket_content(sock, timeout=0.5))
         sock.send(b'HTTP/1.1 200 OK\r\n\r\n')
@@ -322,31 +328,24 @@ def test_redirect_rfc1808_to_non_ascii_location():
     server = Server(redirect_resp_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = u'http://{}:{}'.format(host, port)
+        url = f'http://{host}:{port}'
         r = requests.get(url=url, allow_redirects=True)
         assert r.status_code == 200
         assert len(r.history) == 1
         assert r.history[0].status_code == 301
         assert redirect_request[0].startswith(b'GET /' + expected_path + b' HTTP/1.1')
-        assert r.url == u'{}/{}'.format(url, expected_path.decode('ascii'))
+        assert r.url == '{}/{}'.format(url, expected_path.decode('ascii'))
 
         close_server.set()
 
+
 def test_fragment_not_sent_with_request():
     """Verify that the fragment portion of a URI isn't sent to the server."""
-    def response_handler(sock):
-        req = consume_socket_content(sock, timeout=0.5)
-        sock.send(
-            b'HTTP/1.1 200 OK\r\n'
-            b'Content-Length: '+bytes(len(req))+b'\r\n'
-            b'\r\n'+req
-        )
-
     close_server = threading.Event()
-    server = Server(response_handler, wait_to_close_event=close_server)
+    server = Server(echo_response_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = 'http://{}:{}/path/to/thing/#view=edit&token=hunter2'.format(host, port)
+        url = f'http://{host}:{port}/path/to/thing/#view=edit&token=hunter2'
         r = requests.get(url)
         raw_request = r.content
 
@@ -361,6 +360,7 @@ def test_fragment_not_sent_with_request():
 
         close_server.set()
 
+
 def test_fragment_update_on_redirect():
     """Verify we only append previous fragment if one doesn't exist on new
     location. If a new fragment is encountered in a Location header, it should
@@ -389,17 +389,40 @@ def test_fragment_update_on_redirect():
     server = Server(response_handler, wait_to_close_event=close_server)
 
     with server as (host, port):
-        url = 'http://{}:{}/path/to/thing/#view=edit&token=hunter2'.format(host, port)
+        url = f'http://{host}:{port}/path/to/thing/#view=edit&token=hunter2'
         r = requests.get(url)
-        raw_request = r.content
 
         assert r.status_code == 200
         assert len(r.history) == 2
         assert r.history[0].request.url == url
 
         # Verify we haven't overwritten the location with our previous fragment.
-        assert r.history[1].request.url == 'http://{}:{}/get#relevant-section'.format(host, port)
+        assert r.history[1].request.url == f'http://{host}:{port}/get#relevant-section'
         # Verify previous fragment is used and not the original.
-        assert r.url == 'http://{}:{}/final-url/#relevant-section'.format(host, port)
+        assert r.url == f'http://{host}:{port}/final-url/#relevant-section'
 
         close_server.set()
+
+
+def test_json_decode_compatibility_for_alt_utf_encodings():
+
+    def response_handler(sock):
+        consume_socket_content(sock, timeout=0.5)
+        sock.send(
+            b'HTTP/1.1 200 OK\r\n'
+            b'Content-Length: 18\r\n\r\n'
+            b'\xff\xfe{\x00"\x00K0"\x00=\x00"\x00\xab0"\x00\r\n'
+        )
+
+    close_server = threading.Event()
+    server = Server(response_handler, wait_to_close_event=close_server)
+
+    with server as (host, port):
+        url = f'http://{host}:{port}/'
+        r = requests.get(url)
+    r.encoding = None
+    with pytest.raises(requests.exceptions.JSONDecodeError) as excinfo:
+        r.json()
+    assert isinstance(excinfo.value, requests.exceptions.RequestException)
+    assert isinstance(excinfo.value, JSONDecodeError)
+    assert r.text not in str(excinfo.value)

tests/test_structures.py

@@ -1,26 +1,25 @@
-# -*- coding: utf-8 -*-
-
 import pytest
 
 from requests.structures import CaseInsensitiveDict, LookupDict
 
 
 class TestCaseInsensitiveDict:
-
     @pytest.fixture(autouse=True)
     def setup(self):
         """CaseInsensitiveDict instance with "Accept" header."""
         self.case_insensitive_dict = CaseInsensitiveDict()
-        self.case_insensitive_dict['Accept'] = 'application/json'
+        self.case_insensitive_dict["Accept"] = "application/json"
 
     def test_list(self):
-        assert list(self.case_insensitive_dict) == ['Accept']
+        assert list(self.case_insensitive_dict) == ["Accept"]
 
-    possible_keys = pytest.mark.parametrize('key', ('accept', 'ACCEPT', 'aCcEpT', 'Accept'))
+    possible_keys = pytest.mark.parametrize(
+        "key", ("accept", "ACCEPT", "aCcEpT", "Accept")
+    )
 
     @possible_keys
     def test_getitem(self, key):
-        assert self.case_insensitive_dict[key] == 'application/json'
+        assert self.case_insensitive_dict[key] == "application/json"
 
     @possible_keys
     def test_delitem(self, key):
@@ -28,7 +27,9 @@ class TestCaseInsensitiveDict:
         assert key not in self.case_insensitive_dict
 
     def test_lower_items(self):
-        assert list(self.case_insensitive_dict.lower_items()) == [('accept', 'application/json')]
+        assert list(self.case_insensitive_dict.lower_items()) == [
+            ("accept", "application/json")
+        ]
 
     def test_repr(self):
         assert repr(self.case_insensitive_dict) == "{'Accept': 'application/json'}"
@@ -39,32 +40,33 @@ class TestCaseInsensitiveDict:
         assert copy == self.case_insensitive_dict
 
     @pytest.mark.parametrize(
-        'other, result', (
-            ({'AccePT': 'application/json'}, True),
+        "other, result",
+        (
+            ({"AccePT": "application/json"}, True),
             ({}, False),
-            (None, False)
-        )
+            (None, False),
+        ),
     )
     def test_instance_equality(self, other, result):
         assert (self.case_insensitive_dict == other) is result
 
 
 class TestLookupDict:
-
     @pytest.fixture(autouse=True)
     def setup(self):
         """LookupDict instance with "bad_gateway" attribute."""
-        self.lookup_dict = LookupDict('test')
+        self.lookup_dict = LookupDict("test")
         self.lookup_dict.bad_gateway = 502
 
     def test_repr(self):
         assert repr(self.lookup_dict) == "<lookup 'test'>"
 
     get_item_parameters = pytest.mark.parametrize(
-        'key, value', (
-            ('bad_gateway', 502),
-            ('not_a_key', None)
-        )
+        "key, value",
+        (
+            ("bad_gateway", 502),
+            ("not_a_key", None),
+        ),
     )
 
     @get_item_parameters

tests/test_testserver.py

@@ -1,16 +1,14 @@
-# -*- coding: utf-8 -*-
-
-import threading
 import socket
+import threading
 import time
 
 import pytest
-import requests
 from tests.testserver.server import Server
 
+import requests
+
 
 class TestTestServer:
-
     def test_basic(self):
         """messages are sent and received properly"""
         question = b"success?"
@@ -44,36 +42,37 @@ class TestTestServer:
     def test_text_response(self):
         """the text_response_server sends the given text"""
         server = Server.text_response_server(
-            "HTTP/1.1 200 OK\r\n" +
-            "Content-Length: 6\r\n" +
-            "\r\nroflol"
+            "HTTP/1.1 200 OK\r\n" "Content-Length: 6\r\n" "\r\nroflol"
         )
 
         with server as (host, port):
-            r = requests.get('http://{}:{}'.format(host, port))
+            r = requests.get(f"http://{host}:{port}")
 
             assert r.status_code == 200
-            assert r.text == u'roflol'
-            assert r.headers['Content-Length'] == '6'
+            assert r.text == "roflol"
+            assert r.headers["Content-Length"] == "6"
 
     def test_basic_response(self):
         """the basic response server returns an empty http response"""
         with Server.basic_response_server() as (host, port):
-            r = requests.get('http://{}:{}'.format(host, port))
+            r = requests.get(f"http://{host}:{port}")
             assert r.status_code == 200
-            assert r.text == u''
-            assert r.headers['Content-Length'] == '0'
+            assert r.text == ""
+            assert r.headers["Content-Length"] == "0"
 
     def test_basic_waiting_server(self):
         """the server waits for the block_server event to be set before closing"""
         block_server = threading.Event()
 
-        with Server.basic_response_server(wait_to_close_event=block_server) as (host, port):
+        with Server.basic_response_server(wait_to_close_event=block_server) as (
+            host,
+            port,
+        ):
             sock = socket.socket()
             sock.connect((host, port))
-            sock.sendall(b'send something')
+            sock.sendall(b"send something")
             time.sleep(2.5)
-            sock.sendall(b'still alive')
+            sock.sendall(b"still alive")
             block_server.set()  # release server block
 
     def test_multiple_requests(self):
@@ -83,7 +82,7 @@ class TestTestServer:
         server = Server.basic_response_server(requests_to_handle=requests_to_handle)
 
         with server as (host, port):
-            server_url = 'http://{}:{}'.format(host, port)
+            server_url = f"http://{host}:{port}"
             for _ in range(requests_to_handle):
                 r = requests.get(server_url)
                 assert r.status_code == 200
@@ -97,8 +96,8 @@ class TestTestServer:
         """can check the requests content"""
         # TODO: figure out why this sometimes fails when using pytest-xdist.
         server = Server.basic_response_server(requests_to_handle=2)
-        first_request = b'put your hands up in the air'
-        second_request = b'put your hand down in the floor'
+        first_request = b"put your hands up in the air"
+        second_request = b"put your hand down in the floor"
 
         with server as address:
             sock1 = socket.socket()
@@ -123,15 +122,15 @@ class TestTestServer:
             sock = socket.socket()
             sock.connect(address)
             time.sleep(1.5)
-            sock.sendall(b'hehehe, not received')
+            sock.sendall(b"hehehe, not received")
             sock.close()
 
-        assert server.handler_results[0] == b''
+        assert server.handler_results[0] == b""
 
     def test_request_recovery_with_bigger_timeout(self):
         """a biggest timeout can be specified"""
         server = Server.basic_response_server(request_timeout=3)
-        data = b'bananadine'
+        data = b"bananadine"
 
         with server as address:
             sock = socket.socket()