Mercurial > repos > shellac > sam_consensus_v3
annotate env/lib/python3.9/site-packages/pip/_internal/network/session.py @ 0:4f3585e2f14b draft default tip
"planemo upload commit 60cee0fc7c0cda8592644e1aad72851dec82c959"
author | shellac |
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date | Mon, 22 Mar 2021 18:12:50 +0000 |
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1 """PipSession and supporting code, containing all pip-specific |
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2 network request configuration and behavior. |
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3 """ |
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4 |
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5 # The following comment should be removed at some point in the future. |
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6 # mypy: disallow-untyped-defs=False |
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7 |
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8 import email.utils |
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9 import ipaddress |
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10 import json |
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11 import logging |
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12 import mimetypes |
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13 import os |
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14 import platform |
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15 import sys |
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16 import urllib.parse |
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17 import warnings |
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18 |
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19 from pip._vendor import requests, six, urllib3 |
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20 from pip._vendor.cachecontrol import CacheControlAdapter |
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21 from pip._vendor.requests.adapters import BaseAdapter, HTTPAdapter |
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22 from pip._vendor.requests.models import Response |
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23 from pip._vendor.requests.structures import CaseInsensitiveDict |
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24 from pip._vendor.urllib3.exceptions import InsecureRequestWarning |
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25 |
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26 from pip import __version__ |
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27 from pip._internal.network.auth import MultiDomainBasicAuth |
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28 from pip._internal.network.cache import SafeFileCache |
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29 |
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30 # Import ssl from compat so the initial import occurs in only one place. |
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31 from pip._internal.utils.compat import has_tls |
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32 from pip._internal.utils.glibc import libc_ver |
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33 from pip._internal.utils.misc import ( |
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34 build_url_from_netloc, |
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35 get_installed_version, |
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36 parse_netloc, |
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37 ) |
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38 from pip._internal.utils.typing import MYPY_CHECK_RUNNING |
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39 from pip._internal.utils.urls import url_to_path |
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40 |
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41 if MYPY_CHECK_RUNNING: |
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42 from typing import Iterator, List, Optional, Tuple, Union |
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43 |
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44 from pip._internal.models.link import Link |
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45 |
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46 SecureOrigin = Tuple[str, str, Optional[Union[int, str]]] |
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47 |
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48 |
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49 logger = logging.getLogger(__name__) |
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50 |
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51 |
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52 # Ignore warning raised when using --trusted-host. |
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53 warnings.filterwarnings("ignore", category=InsecureRequestWarning) |
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54 |
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55 |
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56 SECURE_ORIGINS = [ |
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57 # protocol, hostname, port |
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58 # Taken from Chrome's list of secure origins (See: http://bit.ly/1qrySKC) |
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59 ("https", "*", "*"), |
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60 ("*", "localhost", "*"), |
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61 ("*", "127.0.0.0/8", "*"), |
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62 ("*", "::1/128", "*"), |
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63 ("file", "*", None), |
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64 # ssh is always secure. |
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65 ("ssh", "*", "*"), |
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66 ] # type: List[SecureOrigin] |
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67 |
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68 |
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69 # These are environment variables present when running under various |
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70 # CI systems. For each variable, some CI systems that use the variable |
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71 # are indicated. The collection was chosen so that for each of a number |
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72 # of popular systems, at least one of the environment variables is used. |
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73 # This list is used to provide some indication of and lower bound for |
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74 # CI traffic to PyPI. Thus, it is okay if the list is not comprehensive. |
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75 # For more background, see: https://github.com/pypa/pip/issues/5499 |
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76 CI_ENVIRONMENT_VARIABLES = ( |
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77 # Azure Pipelines |
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78 'BUILD_BUILDID', |
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79 # Jenkins |
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80 'BUILD_ID', |
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81 # AppVeyor, CircleCI, Codeship, Gitlab CI, Shippable, Travis CI |
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82 'CI', |
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83 # Explicit environment variable. |
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84 'PIP_IS_CI', |
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85 ) |
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86 |
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87 |
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88 def looks_like_ci(): |
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89 # type: () -> bool |
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90 """ |
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91 Return whether it looks like pip is running under CI. |
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92 """ |
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93 # We don't use the method of checking for a tty (e.g. using isatty()) |
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94 # because some CI systems mimic a tty (e.g. Travis CI). Thus that |
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95 # method doesn't provide definitive information in either direction. |
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96 return any(name in os.environ for name in CI_ENVIRONMENT_VARIABLES) |
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97 |
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98 |
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99 def user_agent(): |
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100 """ |
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101 Return a string representing the user agent. |
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102 """ |
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103 data = { |
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104 "installer": {"name": "pip", "version": __version__}, |
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105 "python": platform.python_version(), |
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106 "implementation": { |
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107 "name": platform.python_implementation(), |
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108 }, |
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109 } |
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110 |
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111 if data["implementation"]["name"] == 'CPython': |
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112 data["implementation"]["version"] = platform.python_version() |
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113 elif data["implementation"]["name"] == 'PyPy': |
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114 if sys.pypy_version_info.releaselevel == 'final': |
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115 pypy_version_info = sys.pypy_version_info[:3] |
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116 else: |
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117 pypy_version_info = sys.pypy_version_info |
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118 data["implementation"]["version"] = ".".join( |
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119 [str(x) for x in pypy_version_info] |
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120 ) |
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121 elif data["implementation"]["name"] == 'Jython': |
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122 # Complete Guess |
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123 data["implementation"]["version"] = platform.python_version() |
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124 elif data["implementation"]["name"] == 'IronPython': |
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125 # Complete Guess |
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126 data["implementation"]["version"] = platform.python_version() |
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127 |
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128 if sys.platform.startswith("linux"): |
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129 from pip._vendor import distro |
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130 distro_infos = dict(filter( |
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131 lambda x: x[1], |
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132 zip(["name", "version", "id"], distro.linux_distribution()), |
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133 )) |
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134 libc = dict(filter( |
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135 lambda x: x[1], |
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136 zip(["lib", "version"], libc_ver()), |
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137 )) |
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138 if libc: |
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139 distro_infos["libc"] = libc |
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140 if distro_infos: |
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141 data["distro"] = distro_infos |
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142 |
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143 if sys.platform.startswith("darwin") and platform.mac_ver()[0]: |
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144 data["distro"] = {"name": "macOS", "version": platform.mac_ver()[0]} |
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145 |
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146 if platform.system(): |
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147 data.setdefault("system", {})["name"] = platform.system() |
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148 |
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149 if platform.release(): |
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150 data.setdefault("system", {})["release"] = platform.release() |
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151 |
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152 if platform.machine(): |
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153 data["cpu"] = platform.machine() |
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154 |
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155 if has_tls(): |
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156 import _ssl as ssl |
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157 data["openssl_version"] = ssl.OPENSSL_VERSION |
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158 |
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159 setuptools_version = get_installed_version("setuptools") |
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160 if setuptools_version is not None: |
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161 data["setuptools_version"] = setuptools_version |
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162 |
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163 # Use None rather than False so as not to give the impression that |
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164 # pip knows it is not being run under CI. Rather, it is a null or |
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165 # inconclusive result. Also, we include some value rather than no |
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166 # value to make it easier to know that the check has been run. |
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167 data["ci"] = True if looks_like_ci() else None |
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168 |
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169 user_data = os.environ.get("PIP_USER_AGENT_USER_DATA") |
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170 if user_data is not None: |
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171 data["user_data"] = user_data |
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172 |
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173 return "{data[installer][name]}/{data[installer][version]} {json}".format( |
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174 data=data, |
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175 json=json.dumps(data, separators=(",", ":"), sort_keys=True), |
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176 ) |
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177 |
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178 |
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179 class LocalFSAdapter(BaseAdapter): |
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180 |
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181 def send(self, request, stream=None, timeout=None, verify=None, cert=None, |
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182 proxies=None): |
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183 pathname = url_to_path(request.url) |
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184 |
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185 resp = Response() |
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186 resp.status_code = 200 |
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187 resp.url = request.url |
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188 |
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189 try: |
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190 stats = os.stat(pathname) |
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191 except OSError as exc: |
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192 resp.status_code = 404 |
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193 resp.raw = exc |
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194 else: |
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195 modified = email.utils.formatdate(stats.st_mtime, usegmt=True) |
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196 content_type = mimetypes.guess_type(pathname)[0] or "text/plain" |
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197 resp.headers = CaseInsensitiveDict({ |
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198 "Content-Type": content_type, |
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199 "Content-Length": stats.st_size, |
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200 "Last-Modified": modified, |
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201 }) |
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202 |
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203 resp.raw = open(pathname, "rb") |
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204 resp.close = resp.raw.close |
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205 |
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206 return resp |
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207 |
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208 def close(self): |
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209 pass |
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210 |
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211 |
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212 class InsecureHTTPAdapter(HTTPAdapter): |
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213 |
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214 def cert_verify(self, conn, url, verify, cert): |
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215 super().cert_verify(conn=conn, url=url, verify=False, cert=cert) |
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216 |
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217 |
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218 class InsecureCacheControlAdapter(CacheControlAdapter): |
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219 |
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220 def cert_verify(self, conn, url, verify, cert): |
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221 super().cert_verify(conn=conn, url=url, verify=False, cert=cert) |
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222 |
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223 |
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224 class PipSession(requests.Session): |
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225 |
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226 timeout = None # type: Optional[int] |
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227 |
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228 def __init__(self, *args, **kwargs): |
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229 """ |
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230 :param trusted_hosts: Domains not to emit warnings for when not using |
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231 HTTPS. |
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232 """ |
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233 retries = kwargs.pop("retries", 0) |
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234 cache = kwargs.pop("cache", None) |
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235 trusted_hosts = kwargs.pop("trusted_hosts", []) # type: List[str] |
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236 index_urls = kwargs.pop("index_urls", None) |
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237 |
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238 super().__init__(*args, **kwargs) |
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239 |
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240 # Namespace the attribute with "pip_" just in case to prevent |
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241 # possible conflicts with the base class. |
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242 self.pip_trusted_origins = [] # type: List[Tuple[str, Optional[int]]] |
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243 |
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244 # Attach our User Agent to the request |
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245 self.headers["User-Agent"] = user_agent() |
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246 |
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247 # Attach our Authentication handler to the session |
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248 self.auth = MultiDomainBasicAuth(index_urls=index_urls) |
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249 |
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250 # Create our urllib3.Retry instance which will allow us to customize |
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251 # how we handle retries. |
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252 retries = urllib3.Retry( |
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253 # Set the total number of retries that a particular request can |
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254 # have. |
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255 total=retries, |
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256 |
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257 # A 503 error from PyPI typically means that the Fastly -> Origin |
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258 # connection got interrupted in some way. A 503 error in general |
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259 # is typically considered a transient error so we'll go ahead and |
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260 # retry it. |
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261 # A 500 may indicate transient error in Amazon S3 |
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262 # A 520 or 527 - may indicate transient error in CloudFlare |
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263 status_forcelist=[500, 503, 520, 527], |
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264 |
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265 # Add a small amount of back off between failed requests in |
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266 # order to prevent hammering the service. |
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267 backoff_factor=0.25, |
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268 ) |
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269 |
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270 # Our Insecure HTTPAdapter disables HTTPS validation. It does not |
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271 # support caching so we'll use it for all http:// URLs. |
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272 # If caching is disabled, we will also use it for |
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273 # https:// hosts that we've marked as ignoring |
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274 # TLS errors for (trusted-hosts). |
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275 insecure_adapter = InsecureHTTPAdapter(max_retries=retries) |
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276 |
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277 # We want to _only_ cache responses on securely fetched origins or when |
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278 # the host is specified as trusted. We do this because |
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279 # we can't validate the response of an insecurely/untrusted fetched |
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280 # origin, and we don't want someone to be able to poison the cache and |
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281 # require manual eviction from the cache to fix it. |
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282 if cache: |
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283 secure_adapter = CacheControlAdapter( |
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284 cache=SafeFileCache(cache), |
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285 max_retries=retries, |
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286 ) |
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287 self._trusted_host_adapter = InsecureCacheControlAdapter( |
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288 cache=SafeFileCache(cache), |
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289 max_retries=retries, |
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290 ) |
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291 else: |
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292 secure_adapter = HTTPAdapter(max_retries=retries) |
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293 self._trusted_host_adapter = insecure_adapter |
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294 |
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295 self.mount("https://", secure_adapter) |
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296 self.mount("http://", insecure_adapter) |
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297 |
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298 # Enable file:// urls |
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299 self.mount("file://", LocalFSAdapter()) |
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300 |
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301 for host in trusted_hosts: |
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302 self.add_trusted_host(host, suppress_logging=True) |
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303 |
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304 def update_index_urls(self, new_index_urls): |
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305 # type: (List[str]) -> None |
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306 """ |
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307 :param new_index_urls: New index urls to update the authentication |
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308 handler with. |
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309 """ |
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310 self.auth.index_urls = new_index_urls |
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311 |
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312 def add_trusted_host(self, host, source=None, suppress_logging=False): |
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313 # type: (str, Optional[str], bool) -> None |
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314 """ |
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315 :param host: It is okay to provide a host that has previously been |
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316 added. |
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317 :param source: An optional source string, for logging where the host |
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318 string came from. |
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319 """ |
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320 if not suppress_logging: |
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321 msg = f'adding trusted host: {host!r}' |
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322 if source is not None: |
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323 msg += f' (from {source})' |
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324 logger.info(msg) |
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325 |
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326 host_port = parse_netloc(host) |
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327 if host_port not in self.pip_trusted_origins: |
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328 self.pip_trusted_origins.append(host_port) |
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329 |
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330 self.mount( |
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331 build_url_from_netloc(host) + '/', |
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332 self._trusted_host_adapter |
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333 ) |
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334 if not host_port[1]: |
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335 # Mount wildcard ports for the same host. |
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336 self.mount( |
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337 build_url_from_netloc(host) + ':', |
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338 self._trusted_host_adapter |
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339 ) |
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340 |
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341 def iter_secure_origins(self): |
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342 # type: () -> Iterator[SecureOrigin] |
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343 yield from SECURE_ORIGINS |
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344 for host, port in self.pip_trusted_origins: |
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345 yield ('*', host, '*' if port is None else port) |
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346 |
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347 def is_secure_origin(self, location): |
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348 # type: (Link) -> bool |
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349 # Determine if this url used a secure transport mechanism |
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350 parsed = urllib.parse.urlparse(str(location)) |
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351 origin_protocol, origin_host, origin_port = ( |
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352 parsed.scheme, parsed.hostname, parsed.port, |
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353 ) |
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354 |
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355 # The protocol to use to see if the protocol matches. |
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356 # Don't count the repository type as part of the protocol: in |
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357 # cases such as "git+ssh", only use "ssh". (I.e., Only verify against |
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358 # the last scheme.) |
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359 origin_protocol = origin_protocol.rsplit('+', 1)[-1] |
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360 |
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361 # Determine if our origin is a secure origin by looking through our |
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362 # hardcoded list of secure origins, as well as any additional ones |
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363 # configured on this PackageFinder instance. |
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364 for secure_origin in self.iter_secure_origins(): |
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365 secure_protocol, secure_host, secure_port = secure_origin |
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366 if origin_protocol != secure_protocol and secure_protocol != "*": |
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367 continue |
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368 |
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369 try: |
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370 addr = ipaddress.ip_address( |
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371 None |
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372 if origin_host is None |
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373 else six.ensure_text(origin_host) |
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374 ) |
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375 network = ipaddress.ip_network( |
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376 six.ensure_text(secure_host) |
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377 ) |
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378 except ValueError: |
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379 # We don't have both a valid address or a valid network, so |
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380 # we'll check this origin against hostnames. |
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381 if ( |
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382 origin_host and |
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383 origin_host.lower() != secure_host.lower() and |
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384 secure_host != "*" |
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385 ): |
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386 continue |
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387 else: |
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388 # We have a valid address and network, so see if the address |
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389 # is contained within the network. |
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390 if addr not in network: |
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391 continue |
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392 |
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393 # Check to see if the port matches. |
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394 if ( |
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395 origin_port != secure_port and |
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396 secure_port != "*" and |
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397 secure_port is not None |
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398 ): |
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399 continue |
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400 |
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401 # If we've gotten here, then this origin matches the current |
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402 # secure origin and we should return True |
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403 return True |
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404 |
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405 # If we've gotten to this point, then the origin isn't secure and we |
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406 # will not accept it as a valid location to search. We will however |
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407 # log a warning that we are ignoring it. |
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408 logger.warning( |
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409 "The repository located at %s is not a trusted or secure host and " |
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410 "is being ignored. If this repository is available via HTTPS we " |
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411 "recommend you use HTTPS instead, otherwise you may silence " |
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412 "this warning and allow it anyway with '--trusted-host %s'.", |
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413 origin_host, |
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414 origin_host, |
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415 ) |
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416 |
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417 return False |
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418 |
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419 def request(self, method, url, *args, **kwargs): |
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420 # Allow setting a default timeout on a session |
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421 kwargs.setdefault("timeout", self.timeout) |
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422 |
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423 # Dispatch the actual request |
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424 return super().request(method, url, *args, **kwargs) |