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annotate planemo/lib/python3.7/site-packages/requests/sessions.py @ 1:56ad4e20f292 draft

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"planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
author guerler
date Fri, 31 Jul 2020 00:32:28 -0400
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1
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1 # -*- coding: utf-8 -*-
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2
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3 """
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4 requests.session
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5 ~~~~~~~~~~~~~~~~
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6
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7 This module provides a Session object to manage and persist settings across
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8 requests (cookies, auth, proxies).
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9 """
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10 import os
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11 import sys
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12 import time
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13 from datetime import timedelta
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14 from collections import OrderedDict
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15
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16 from .auth import _basic_auth_str
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17 from .compat import cookielib, is_py3, urljoin, urlparse, Mapping
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18 from .cookies import (
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19 cookiejar_from_dict, extract_cookies_to_jar, RequestsCookieJar, merge_cookies)
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20 from .models import Request, PreparedRequest, DEFAULT_REDIRECT_LIMIT
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21 from .hooks import default_hooks, dispatch_hook
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22 from ._internal_utils import to_native_string
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23 from .utils import to_key_val_list, default_headers, DEFAULT_PORTS
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24 from .exceptions import (
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25 TooManyRedirects, InvalidSchema, ChunkedEncodingError, ContentDecodingError)
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26
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27 from .structures import CaseInsensitiveDict
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28 from .adapters import HTTPAdapter
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29
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30 from .utils import (
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31 requote_uri, get_environ_proxies, get_netrc_auth, should_bypass_proxies,
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32 get_auth_from_url, rewind_body
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33 )
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34
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35 from .status_codes import codes
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36
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37 # formerly defined here, reexposed here for backward compatibility
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38 from .models import REDIRECT_STATI
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39
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40 # Preferred clock, based on which one is more accurate on a given system.
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41 if sys.platform == 'win32':
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42 try: # Python 3.4+
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43 preferred_clock = time.perf_counter
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44 except AttributeError: # Earlier than Python 3.
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45 preferred_clock = time.clock
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46 else:
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47 preferred_clock = time.time
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48
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49
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50 def merge_setting(request_setting, session_setting, dict_class=OrderedDict):
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51 """Determines appropriate setting for a given request, taking into account
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52 the explicit setting on that request, and the setting in the session. If a
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53 setting is a dictionary, they will be merged together using `dict_class`
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54 """
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55
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56 if session_setting is None:
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57 return request_setting
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58
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59 if request_setting is None:
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60 return session_setting
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61
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62 # Bypass if not a dictionary (e.g. verify)
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63 if not (
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64 isinstance(session_setting, Mapping) and
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65 isinstance(request_setting, Mapping)
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66 ):
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67 return request_setting
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68
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69 merged_setting = dict_class(to_key_val_list(session_setting))
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70 merged_setting.update(to_key_val_list(request_setting))
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71
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72 # Remove keys that are set to None. Extract keys first to avoid altering
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73 # the dictionary during iteration.
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74 none_keys = [k for (k, v) in merged_setting.items() if v is None]
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75 for key in none_keys:
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76 del merged_setting[key]
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77
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78 return merged_setting
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79
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80
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81 def merge_hooks(request_hooks, session_hooks, dict_class=OrderedDict):
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82 """Properly merges both requests and session hooks.
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83
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84 This is necessary because when request_hooks == {'response': []}, the
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85 merge breaks Session hooks entirely.
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86 """
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87 if session_hooks is None or session_hooks.get('response') == []:
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88 return request_hooks
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89
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90 if request_hooks is None or request_hooks.get('response') == []:
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91 return session_hooks
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92
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93 return merge_setting(request_hooks, session_hooks, dict_class)
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94
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95
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96 class SessionRedirectMixin(object):
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97
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98 def get_redirect_target(self, resp):
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99 """Receives a Response. Returns a redirect URI or ``None``"""
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100 # Due to the nature of how requests processes redirects this method will
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101 # be called at least once upon the original response and at least twice
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102 # on each subsequent redirect response (if any).
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103 # If a custom mixin is used to handle this logic, it may be advantageous
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104 # to cache the redirect location onto the response object as a private
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105 # attribute.
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106 if resp.is_redirect:
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107 location = resp.headers['location']
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108 # Currently the underlying http module on py3 decode headers
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109 # in latin1, but empirical evidence suggests that latin1 is very
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110 # rarely used with non-ASCII characters in HTTP headers.
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111 # It is more likely to get UTF8 header rather than latin1.
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112 # This causes incorrect handling of UTF8 encoded location headers.
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113 # To solve this, we re-encode the location in latin1.
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114 if is_py3:
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115 location = location.encode('latin1')
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116 return to_native_string(location, 'utf8')
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117 return None
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118
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119 def should_strip_auth(self, old_url, new_url):
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120 """Decide whether Authorization header should be removed when redirecting"""
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121 old_parsed = urlparse(old_url)
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122 new_parsed = urlparse(new_url)
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123 if old_parsed.hostname != new_parsed.hostname:
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124 return True
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125 # Special case: allow http -> https redirect when using the standard
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126 # ports. This isn't specified by RFC 7235, but is kept to avoid
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127 # breaking backwards compatibility with older versions of requests
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128 # that allowed any redirects on the same host.
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129 if (old_parsed.scheme == 'http' and old_parsed.port in (80, None)
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130 and new_parsed.scheme == 'https' and new_parsed.port in (443, None)):
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131 return False
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132
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133 # Handle default port usage corresponding to scheme.
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134 changed_port = old_parsed.port != new_parsed.port
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135 changed_scheme = old_parsed.scheme != new_parsed.scheme
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136 default_port = (DEFAULT_PORTS.get(old_parsed.scheme, None), None)
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137 if (not changed_scheme and old_parsed.port in default_port
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138 and new_parsed.port in default_port):
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139 return False
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140
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141 # Standard case: root URI must match
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142 return changed_port or changed_scheme
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143
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144 def resolve_redirects(self, resp, req, stream=False, timeout=None,
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145 verify=True, cert=None, proxies=None, yield_requests=False, **adapter_kwargs):
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146 """Receives a Response. Returns a generator of Responses or Requests."""
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147
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148 hist = [] # keep track of history
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149
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150 url = self.get_redirect_target(resp)
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151 previous_fragment = urlparse(req.url).fragment
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152 while url:
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153 prepared_request = req.copy()
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154
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155 # Update history and keep track of redirects.
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156 # resp.history must ignore the original request in this loop
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157 hist.append(resp)
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158 resp.history = hist[1:]
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159
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160 try:
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161 resp.content # Consume socket so it can be released
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162 except (ChunkedEncodingError, ContentDecodingError, RuntimeError):
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163 resp.raw.read(decode_content=False)
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164
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165 if len(resp.history) >= self.max_redirects:
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166 raise TooManyRedirects('Exceeded {} redirects.'.format(self.max_redirects), response=resp)
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167
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168 # Release the connection back into the pool.
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169 resp.close()
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170
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171 # Handle redirection without scheme (see: RFC 1808 Section 4)
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172 if url.startswith('//'):
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173 parsed_rurl = urlparse(resp.url)
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174 url = ':'.join([to_native_string(parsed_rurl.scheme), url])
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175
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176 # Normalize url case and attach previous fragment if needed (RFC 7231 7.1.2)
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177 parsed = urlparse(url)
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178 if parsed.fragment == '' and previous_fragment:
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179 parsed = parsed._replace(fragment=previous_fragment)
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180 elif parsed.fragment:
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181 previous_fragment = parsed.fragment
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182 url = parsed.geturl()
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183
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184 # Facilitate relative 'location' headers, as allowed by RFC 7231.
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185 # (e.g. '/path/to/resource' instead of 'http://domain.tld/path/to/resource')
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186 # Compliant with RFC3986, we percent encode the url.
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187 if not parsed.netloc:
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188 url = urljoin(resp.url, requote_uri(url))
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189 else:
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190 url = requote_uri(url)
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191
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192 prepared_request.url = to_native_string(url)
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193
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194 self.rebuild_method(prepared_request, resp)
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195
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196 # https://github.com/psf/requests/issues/1084
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197 if resp.status_code not in (codes.temporary_redirect, codes.permanent_redirect):
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198 # https://github.com/psf/requests/issues/3490
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199 purged_headers = ('Content-Length', 'Content-Type', 'Transfer-Encoding')
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200 for header in purged_headers:
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201 prepared_request.headers.pop(header, None)
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202 prepared_request.body = None
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203
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204 headers = prepared_request.headers
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205 headers.pop('Cookie', None)
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206
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207 # Extract any cookies sent on the response to the cookiejar
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208 # in the new request. Because we've mutated our copied prepared
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209 # request, use the old one that we haven't yet touched.
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210 extract_cookies_to_jar(prepared_request._cookies, req, resp.raw)
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211 merge_cookies(prepared_request._cookies, self.cookies)
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212 prepared_request.prepare_cookies(prepared_request._cookies)
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213
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214 # Rebuild auth and proxy information.
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215 proxies = self.rebuild_proxies(prepared_request, proxies)
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216 self.rebuild_auth(prepared_request, resp)
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217
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218 # A failed tell() sets `_body_position` to `object()`. This non-None
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219 # value ensures `rewindable` will be True, allowing us to raise an
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220 # UnrewindableBodyError, instead of hanging the connection.
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221 rewindable = (
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222 prepared_request._body_position is not None and
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223 ('Content-Length' in headers or 'Transfer-Encoding' in headers)
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224 )
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225
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226 # Attempt to rewind consumed file-like object.
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227 if rewindable:
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228 rewind_body(prepared_request)
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229
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230 # Override the original request.
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231 req = prepared_request
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232
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233 if yield_requests:
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234 yield req
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235 else:
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236
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237 resp = self.send(
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238 req,
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239 stream=stream,
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240 timeout=timeout,
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241 verify=verify,
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242 cert=cert,
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243 proxies=proxies,
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244 allow_redirects=False,
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245 **adapter_kwargs
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246 )
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247
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248 extract_cookies_to_jar(self.cookies, prepared_request, resp.raw)
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249
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250 # extract redirect url, if any, for the next loop
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251 url = self.get_redirect_target(resp)
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252 yield resp
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253
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254 def rebuild_auth(self, prepared_request, response):
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255 """When being redirected we may want to strip authentication from the
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256 request to avoid leaking credentials. This method intelligently removes
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257 and reapplies authentication where possible to avoid credential loss.
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258 """
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259 headers = prepared_request.headers
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260 url = prepared_request.url
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261
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262 if 'Authorization' in headers and self.should_strip_auth(response.request.url, url):
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263 # If we get redirected to a new host, we should strip out any
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264 # authentication headers.
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265 del headers['Authorization']
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266
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267 # .netrc might have more auth for us on our new host.
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268 new_auth = get_netrc_auth(url) if self.trust_env else None
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269 if new_auth is not None:
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270 prepared_request.prepare_auth(new_auth)
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271
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272
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273 def rebuild_proxies(self, prepared_request, proxies):
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274 """This method re-evaluates the proxy configuration by considering the
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275 environment variables. If we are redirected to a URL covered by
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276 NO_PROXY, we strip the proxy configuration. Otherwise, we set missing
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277 proxy keys for this URL (in case they were stripped by a previous
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278 redirect).
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279
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280 This method also replaces the Proxy-Authorization header where
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281 necessary.
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282
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283 :rtype: dict
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284 """
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285 proxies = proxies if proxies is not None else {}
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286 headers = prepared_request.headers
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287 url = prepared_request.url
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288 scheme = urlparse(url).scheme
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289 new_proxies = proxies.copy()
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290 no_proxy = proxies.get('no_proxy')
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291
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292 bypass_proxy = should_bypass_proxies(url, no_proxy=no_proxy)
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293 if self.trust_env and not bypass_proxy:
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294 environ_proxies = get_environ_proxies(url, no_proxy=no_proxy)
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295
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296 proxy = environ_proxies.get(scheme, environ_proxies.get('all'))
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297
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298 if proxy:
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299 new_proxies.setdefault(scheme, proxy)
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300
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301 if 'Proxy-Authorization' in headers:
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302 del headers['Proxy-Authorization']
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303
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304 try:
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305 username, password = get_auth_from_url(new_proxies[scheme])
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306 except KeyError:
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307 username, password = None, None
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308
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309 if username and password:
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310 headers['Proxy-Authorization'] = _basic_auth_str(username, password)
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311
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312 return new_proxies
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313
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314 def rebuild_method(self, prepared_request, response):
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315 """When being redirected we may want to change the method of the request
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316 based on certain specs or browser behavior.
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317 """
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318 method = prepared_request.method
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319
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320 # https://tools.ietf.org/html/rfc7231#section-6.4.4
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321 if response.status_code == codes.see_other and method != 'HEAD':
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322 method = 'GET'
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323
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324 # Do what the browsers do, despite standards...
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325 # First, turn 302s into GETs.
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326 if response.status_code == codes.found and method != 'HEAD':
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327 method = 'GET'
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328
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329 # Second, if a POST is responded to with a 301, turn it into a GET.
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330 # This bizarre behaviour is explained in Issue 1704.
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331 if response.status_code == codes.moved and method == 'POST':
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332 method = 'GET'
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333
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334 prepared_request.method = method
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335
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336
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337 class Session(SessionRedirectMixin):
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338 """A Requests session.
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339
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340 Provides cookie persistence, connection-pooling, and configuration.
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341
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342 Basic Usage::
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343
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344 >>> import requests
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345 >>> s = requests.Session()
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346 >>> s.get('https://httpbin.org/get')
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347 <Response [200]>
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348
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349 Or as a context manager::
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350
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351 >>> with requests.Session() as s:
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352 ... s.get('https://httpbin.org/get')
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353 <Response [200]>
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354 """
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355
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356 __attrs__ = [
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357 'headers', 'cookies', 'auth', 'proxies', 'hooks', 'params', 'verify',
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358 'cert', 'adapters', 'stream', 'trust_env',
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359 'max_redirects',
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360 ]
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361
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362 def __init__(self):
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363
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364 #: A case-insensitive dictionary of headers to be sent on each
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365 #: :class:`Request <Request>` sent from this
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366 #: :class:`Session <Session>`.
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367 self.headers = default_headers()
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368
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369 #: Default Authentication tuple or object to attach to
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370 #: :class:`Request <Request>`.
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371 self.auth = None
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372
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373 #: Dictionary mapping protocol or protocol and host to the URL of the proxy
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374 #: (e.g. {'http': 'foo.bar:3128', 'http://host.name': 'foo.bar:4012'}) to
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375 #: be used on each :class:`Request <Request>`.
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376 self.proxies = {}
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377
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378 #: Event-handling hooks.
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379 self.hooks = default_hooks()
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380
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381 #: Dictionary of querystring data to attach to each
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382 #: :class:`Request <Request>`. The dictionary values may be lists for
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383 #: representing multivalued query parameters.
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384 self.params = {}
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385
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386 #: Stream response content default.
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387 self.stream = False
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388
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389 #: SSL Verification default.
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390 self.verify = True
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391
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392 #: SSL client certificate default, if String, path to ssl client
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393 #: cert file (.pem). If Tuple, ('cert', 'key') pair.
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394 self.cert = None
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395
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396 #: Maximum number of redirects allowed. If the request exceeds this
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397 #: limit, a :class:`TooManyRedirects` exception is raised.
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398 #: This defaults to requests.models.DEFAULT_REDIRECT_LIMIT, which is
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399 #: 30.
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400 self.max_redirects = DEFAULT_REDIRECT_LIMIT
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401
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402 #: Trust environment settings for proxy configuration, default
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403 #: authentication and similar.
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404 self.trust_env = True
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405
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406 #: A CookieJar containing all currently outstanding cookies set on this
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407 #: session. By default it is a
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408 #: :class:`RequestsCookieJar <requests.cookies.RequestsCookieJar>`, but
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409 #: may be any other ``cookielib.CookieJar`` compatible object.
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410 self.cookies = cookiejar_from_dict({})
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411
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412 # Default connection adapters.
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413 self.adapters = OrderedDict()
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414 self.mount('https://', HTTPAdapter())
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415 self.mount('http://', HTTPAdapter())
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416
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417 def __enter__(self):
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418 return self
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419
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420 def __exit__(self, *args):
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421 self.close()
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422
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423 def prepare_request(self, request):
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424 """Constructs a :class:`PreparedRequest <PreparedRequest>` for
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425 transmission and returns it. The :class:`PreparedRequest` has settings
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426 merged from the :class:`Request <Request>` instance and those of the
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427 :class:`Session`.
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428
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429 :param request: :class:`Request` instance to prepare with this
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430 session's settings.
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431 :rtype: requests.PreparedRequest
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432 """
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433 cookies = request.cookies or {}
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434
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435 # Bootstrap CookieJar.
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436 if not isinstance(cookies, cookielib.CookieJar):
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437 cookies = cookiejar_from_dict(cookies)
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438
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439 # Merge with session cookies
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440 merged_cookies = merge_cookies(
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441 merge_cookies(RequestsCookieJar(), self.cookies), cookies)
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442
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443 # Set environment's basic authentication if not explicitly set.
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444 auth = request.auth
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445 if self.trust_env and not auth and not self.auth:
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446 auth = get_netrc_auth(request.url)
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447
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448 p = PreparedRequest()
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449 p.prepare(
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450 method=request.method.upper(),
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451 url=request.url,
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452 files=request.files,
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453 data=request.data,
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454 json=request.json,
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455 headers=merge_setting(request.headers, self.headers, dict_class=CaseInsensitiveDict),
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456 params=merge_setting(request.params, self.params),
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457 auth=merge_setting(auth, self.auth),
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458 cookies=merged_cookies,
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459 hooks=merge_hooks(request.hooks, self.hooks),
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460 )
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461 return p
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462
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463 def request(self, method, url,
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464 params=None, data=None, headers=None, cookies=None, files=None,
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465 auth=None, timeout=None, allow_redirects=True, proxies=None,
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466 hooks=None, stream=None, verify=None, cert=None, json=None):
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467 """Constructs a :class:`Request <Request>`, prepares it and sends it.
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468 Returns :class:`Response <Response>` object.
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469
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470 :param method: method for the new :class:`Request` object.
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471 :param url: URL for the new :class:`Request` object.
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472 :param params: (optional) Dictionary or bytes to be sent in the query
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473 string for the :class:`Request`.
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474 :param data: (optional) Dictionary, list of tuples, bytes, or file-like
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475 object to send in the body of the :class:`Request`.
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476 :param json: (optional) json to send in the body of the
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477 :class:`Request`.
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478 :param headers: (optional) Dictionary of HTTP Headers to send with the
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479 :class:`Request`.
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480 :param cookies: (optional) Dict or CookieJar object to send with the
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481 :class:`Request`.
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482 :param files: (optional) Dictionary of ``'filename': file-like-objects``
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483 for multipart encoding upload.
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484 :param auth: (optional) Auth tuple or callable to enable
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485 Basic/Digest/Custom HTTP Auth.
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486 :param timeout: (optional) How long to wait for the server to send
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487 data before giving up, as a float, or a :ref:`(connect timeout,
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488 read timeout) <timeouts>` tuple.
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489 :type timeout: float or tuple
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490 :param allow_redirects: (optional) Set to True by default.
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491 :type allow_redirects: bool
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492 :param proxies: (optional) Dictionary mapping protocol or protocol and
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493 hostname to the URL of the proxy.
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494 :param stream: (optional) whether to immediately download the response
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495 content. Defaults to ``False``.
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496 :param verify: (optional) Either a boolean, in which case it controls whether we verify
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497 the server's TLS certificate, or a string, in which case it must be a path
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498 to a CA bundle to use. Defaults to ``True``.
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499 :param cert: (optional) if String, path to ssl client cert file (.pem).
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500 If Tuple, ('cert', 'key') pair.
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501 :rtype: requests.Response
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502 """
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503 # Create the Request.
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504 req = Request(
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505 method=method.upper(),
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506 url=url,
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507 headers=headers,
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508 files=files,
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509 data=data or {},
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510 json=json,
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511 params=params or {},
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512 auth=auth,
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513 cookies=cookies,
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514 hooks=hooks,
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515 )
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516 prep = self.prepare_request(req)
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517
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518 proxies = proxies or {}
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519
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520 settings = self.merge_environment_settings(
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521 prep.url, proxies, stream, verify, cert
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522 )
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523
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524 # Send the request.
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525 send_kwargs = {
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526 'timeout': timeout,
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527 'allow_redirects': allow_redirects,
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528 }
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529 send_kwargs.update(settings)
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530 resp = self.send(prep, **send_kwargs)
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531
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532 return resp
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533
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534 def get(self, url, **kwargs):
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535 r"""Sends a GET request. Returns :class:`Response` object.
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536
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537 :param url: URL for the new :class:`Request` object.
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538 :param \*\*kwargs: Optional arguments that ``request`` takes.
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539 :rtype: requests.Response
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540 """
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541
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542 kwargs.setdefault('allow_redirects', True)
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543 return self.request('GET', url, **kwargs)
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544
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545 def options(self, url, **kwargs):
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546 r"""Sends a OPTIONS request. Returns :class:`Response` object.
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547
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548 :param url: URL for the new :class:`Request` object.
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549 :param \*\*kwargs: Optional arguments that ``request`` takes.
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550 :rtype: requests.Response
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551 """
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552
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553 kwargs.setdefault('allow_redirects', True)
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554 return self.request('OPTIONS', url, **kwargs)
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555
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556 def head(self, url, **kwargs):
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557 r"""Sends a HEAD request. Returns :class:`Response` object.
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558
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559 :param url: URL for the new :class:`Request` object.
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560 :param \*\*kwargs: Optional arguments that ``request`` takes.
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561 :rtype: requests.Response
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562 """
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563
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564 kwargs.setdefault('allow_redirects', False)
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565 return self.request('HEAD', url, **kwargs)
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566
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567 def post(self, url, data=None, json=None, **kwargs):
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568 r"""Sends a POST request. Returns :class:`Response` object.
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569
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570 :param url: URL for the new :class:`Request` object.
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571 :param data: (optional) Dictionary, list of tuples, bytes, or file-like
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572 object to send in the body of the :class:`Request`.
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573 :param json: (optional) json to send in the body of the :class:`Request`.
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574 :param \*\*kwargs: Optional arguments that ``request`` takes.
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575 :rtype: requests.Response
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576 """
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577
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578 return self.request('POST', url, data=data, json=json, **kwargs)
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579
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580 def put(self, url, data=None, **kwargs):
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581 r"""Sends a PUT request. Returns :class:`Response` object.
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582
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583 :param url: URL for the new :class:`Request` object.
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584 :param data: (optional) Dictionary, list of tuples, bytes, or file-like
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585 object to send in the body of the :class:`Request`.
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586 :param \*\*kwargs: Optional arguments that ``request`` takes.
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587 :rtype: requests.Response
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588 """
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589
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590 return self.request('PUT', url, data=data, **kwargs)
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591
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592 def patch(self, url, data=None, **kwargs):
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593 r"""Sends a PATCH request. Returns :class:`Response` object.
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594
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595 :param url: URL for the new :class:`Request` object.
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596 :param data: (optional) Dictionary, list of tuples, bytes, or file-like
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597 object to send in the body of the :class:`Request`.
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598 :param \*\*kwargs: Optional arguments that ``request`` takes.
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599 :rtype: requests.Response
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600 """
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601
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602 return self.request('PATCH', url, data=data, **kwargs)
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603
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604 def delete(self, url, **kwargs):
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605 r"""Sends a DELETE request. Returns :class:`Response` object.
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606
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607 :param url: URL for the new :class:`Request` object.
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608 :param \*\*kwargs: Optional arguments that ``request`` takes.
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609 :rtype: requests.Response
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610 """
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611
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612 return self.request('DELETE', url, **kwargs)
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613
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614 def send(self, request, **kwargs):
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615 """Send a given PreparedRequest.
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616
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617 :rtype: requests.Response
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618 """
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619 # Set defaults that the hooks can utilize to ensure they always have
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620 # the correct parameters to reproduce the previous request.
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621 kwargs.setdefault('stream', self.stream)
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622 kwargs.setdefault('verify', self.verify)
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623 kwargs.setdefault('cert', self.cert)
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624 kwargs.setdefault('proxies', self.proxies)
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625
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626 # It's possible that users might accidentally send a Request object.
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627 # Guard against that specific failure case.
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628 if isinstance(request, Request):
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629 raise ValueError('You can only send PreparedRequests.')
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630
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631 # Set up variables needed for resolve_redirects and dispatching of hooks
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632 allow_redirects = kwargs.pop('allow_redirects', True)
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633 stream = kwargs.get('stream')
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634 hooks = request.hooks
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635
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636 # Get the appropriate adapter to use
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637 adapter = self.get_adapter(url=request.url)
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638
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639 # Start time (approximately) of the request
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parents:
diff changeset
640 start = preferred_clock()
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parents:
diff changeset
641
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guerler
parents:
diff changeset
642 # Send the request
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guerler
parents:
diff changeset
643 r = adapter.send(request, **kwargs)
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guerler
parents:
diff changeset
644
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guerler
parents:
diff changeset
645 # Total elapsed time of the request (approximately)
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guerler
parents:
diff changeset
646 elapsed = preferred_clock() - start
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guerler
parents:
diff changeset
647 r.elapsed = timedelta(seconds=elapsed)
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guerler
parents:
diff changeset
648
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guerler
parents:
diff changeset
649 # Response manipulation hooks
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parents:
diff changeset
650 r = dispatch_hook('response', hooks, r, **kwargs)
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parents:
diff changeset
651
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guerler
parents:
diff changeset
652 # Persist cookies
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parents:
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653 if r.history:
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parents:
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654
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guerler
parents:
diff changeset
655 # If the hooks create history then we want those cookies too
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parents:
diff changeset
656 for resp in r.history:
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diff changeset
657 extract_cookies_to_jar(self.cookies, resp.request, resp.raw)
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parents:
diff changeset
658
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659 extract_cookies_to_jar(self.cookies, request, r.raw)
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parents:
diff changeset
660
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parents:
diff changeset
661 # Resolve redirects if allowed.
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parents:
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662 if allow_redirects:
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parents:
diff changeset
663 # Redirect resolving generator.
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diff changeset
664 gen = self.resolve_redirects(r, request, **kwargs)
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665 history = [resp for resp in gen]
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666 else:
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667 history = []
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668
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669 # Shuffle things around if there's history.
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670 if history:
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671 # Insert the first (original) request at the start
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diff changeset
672 history.insert(0, r)
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parents:
diff changeset
673 # Get the last request made
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674 r = history.pop()
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675 r.history = history
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676
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diff changeset
677 # If redirects aren't being followed, store the response on the Request for Response.next().
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parents:
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678 if not allow_redirects:
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679 try:
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680 r._next = next(self.resolve_redirects(r, request, yield_requests=True, **kwargs))
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681 except StopIteration:
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diff changeset
682 pass
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diff changeset
683
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684 if not stream:
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diff changeset
685 r.content
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686
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diff changeset
687 return r
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diff changeset
688
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diff changeset
689 def merge_environment_settings(self, url, proxies, stream, verify, cert):
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diff changeset
690 """
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diff changeset
691 Check the environment and merge it with some settings.
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diff changeset
692
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693 :rtype: dict
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694 """
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guerler
parents:
diff changeset
695 # Gather clues from the surrounding environment.
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diff changeset
696 if self.trust_env:
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parents:
diff changeset
697 # Set environment's proxies.
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diff changeset
698 no_proxy = proxies.get('no_proxy') if proxies is not None else None
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diff changeset
699 env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
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700 for (k, v) in env_proxies.items():
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guerler
parents:
diff changeset
701 proxies.setdefault(k, v)
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diff changeset
702
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diff changeset
703 # Look for requests environment configuration and be compatible
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guerler
parents:
diff changeset
704 # with cURL.
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diff changeset
705 if verify is True or verify is None:
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parents:
diff changeset
706 verify = (os.environ.get('REQUESTS_CA_BUNDLE') or
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diff changeset
707 os.environ.get('CURL_CA_BUNDLE'))
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parents:
diff changeset
708
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parents:
diff changeset
709 # Merge all the kwargs.
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parents:
diff changeset
710 proxies = merge_setting(proxies, self.proxies)
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parents:
diff changeset
711 stream = merge_setting(stream, self.stream)
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guerler
parents:
diff changeset
712 verify = merge_setting(verify, self.verify)
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guerler
parents:
diff changeset
713 cert = merge_setting(cert, self.cert)
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diff changeset
714
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guerler
parents:
diff changeset
715 return {'verify': verify, 'proxies': proxies, 'stream': stream,
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guerler
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diff changeset
716 'cert': cert}
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guerler
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diff changeset
717
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parents:
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718 def get_adapter(self, url):
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parents:
diff changeset
719 """
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guerler
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diff changeset
720 Returns the appropriate connection adapter for the given URL.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
721
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diff changeset
722 :rtype: requests.adapters.BaseAdapter
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parents:
diff changeset
723 """
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parents:
diff changeset
724 for (prefix, adapter) in self.adapters.items():
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parents:
diff changeset
725
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parents:
diff changeset
726 if url.lower().startswith(prefix.lower()):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
727 return adapter
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
728
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
729 # Nothing matches :-/
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
730 raise InvalidSchema("No connection adapters were found for {!r}".format(url))
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guerler
parents:
diff changeset
731
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guerler
parents:
diff changeset
732 def close(self):
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guerler
parents:
diff changeset
733 """Closes all adapters and as such the session"""
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
734 for v in self.adapters.values():
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parents:
diff changeset
735 v.close()
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diff changeset
736
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parents:
diff changeset
737 def mount(self, prefix, adapter):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
738 """Registers a connection adapter to a prefix.
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diff changeset
739
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diff changeset
740 Adapters are sorted in descending order by prefix length.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
741 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
742 self.adapters[prefix] = adapter
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
743 keys_to_move = [k for k in self.adapters if len(k) < len(prefix)]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
744
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
745 for key in keys_to_move:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
746 self.adapters[key] = self.adapters.pop(key)
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guerler
parents:
diff changeset
747
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parents:
diff changeset
748 def __getstate__(self):
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parents:
diff changeset
749 state = {attr: getattr(self, attr, None) for attr in self.__attrs__}
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
750 return state
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guerler
parents:
diff changeset
751
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parents:
diff changeset
752 def __setstate__(self, state):
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parents:
diff changeset
753 for attr, value in state.items():
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
754 setattr(self, attr, value)
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parents:
diff changeset
755
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parents:
diff changeset
756
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diff changeset
757 def session():
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guerler
parents:
diff changeset
758 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
759 Returns a :class:`Session` for context-management.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
760
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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parents:
diff changeset
761 .. deprecated:: 1.0.0
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guerler
parents:
diff changeset
762
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
763 This method has been deprecated since version 1.0.0 and is only kept for
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
764 backwards compatibility. New code should use :class:`~requests.sessions.Session`
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
765 to create a session. This may be removed at a future date.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
766
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
767 :rtype: Session
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
768 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
769 return Session()