Mercurial > repos > guerler > springsuite

annotate planemo/lib/python3.7/site-packages/urllib3/response.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 from __future__ import absolute_import
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2 from contextlib import contextmanager
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3 import zlib
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4 import io
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5 import logging
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6 from socket import timeout as SocketTimeout
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7 from socket import error as SocketError
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8
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9 try:
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10 import brotli
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11 except ImportError:
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12 brotli = None
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13
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14 from ._collections import HTTPHeaderDict
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15 from .exceptions import (
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16 BodyNotHttplibCompatible,
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17 ProtocolError,
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18 DecodeError,
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19 ReadTimeoutError,
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20 ResponseNotChunked,
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21 IncompleteRead,
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22 InvalidHeader,
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23 HTTPError,
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24 )
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25 from .packages.six import string_types as basestring, PY3
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26 from .packages.six.moves import http_client as httplib
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27 from .connection import HTTPException, BaseSSLError
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28 from .util.response import is_fp_closed, is_response_to_head
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29
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30 log = logging.getLogger(__name__)
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31
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32
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33 class DeflateDecoder(object):
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34 def __init__(self):
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35 self._first_try = True
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36 self._data = b""
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37 self._obj = zlib.decompressobj()
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38
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39 def __getattr__(self, name):
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40 return getattr(self._obj, name)
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41
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42 def decompress(self, data):
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43 if not data:
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44 return data
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45
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46 if not self._first_try:
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47 return self._obj.decompress(data)
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48
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49 self._data += data
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50 try:
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51 decompressed = self._obj.decompress(data)
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52 if decompressed:
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53 self._first_try = False
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54 self._data = None
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55 return decompressed
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56 except zlib.error:
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57 self._first_try = False
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58 self._obj = zlib.decompressobj(-zlib.MAX_WBITS)
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59 try:
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60 return self.decompress(self._data)
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61 finally:
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62 self._data = None
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63
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64
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65 class GzipDecoderState(object):
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66
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67 FIRST_MEMBER = 0
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68 OTHER_MEMBERS = 1
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69 SWALLOW_DATA = 2
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70
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71
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72 class GzipDecoder(object):
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73 def __init__(self):
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74 self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
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75 self._state = GzipDecoderState.FIRST_MEMBER
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76
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77 def __getattr__(self, name):
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78 return getattr(self._obj, name)
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79
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80 def decompress(self, data):
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81 ret = bytearray()
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82 if self._state == GzipDecoderState.SWALLOW_DATA or not data:
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83 return bytes(ret)
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84 while True:
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85 try:
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86 ret += self._obj.decompress(data)
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87 except zlib.error:
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88 previous_state = self._state
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89 # Ignore data after the first error
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90 self._state = GzipDecoderState.SWALLOW_DATA
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91 if previous_state == GzipDecoderState.OTHER_MEMBERS:
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92 # Allow trailing garbage acceptable in other gzip clients
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93 return bytes(ret)
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94 raise
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95 data = self._obj.unused_data
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96 if not data:
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97 return bytes(ret)
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98 self._state = GzipDecoderState.OTHER_MEMBERS
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99 self._obj = zlib.decompressobj(16 + zlib.MAX_WBITS)
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100
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101
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102 if brotli is not None:
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103
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104 class BrotliDecoder(object):
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105 # Supports both 'brotlipy' and 'Brotli' packages
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106 # since they share an import name. The top branches
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107 # are for 'brotlipy' and bottom branches for 'Brotli'
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108 def __init__(self):
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109 self._obj = brotli.Decompressor()
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110 if hasattr(self._obj, "decompress"):
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111 self.decompress = self._obj.decompress
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112 else:
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113 self.decompress = self._obj.process
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114
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115 def flush(self):
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116 if hasattr(self._obj, "flush"):
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117 return self._obj.flush()
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118 return b""
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119
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120
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121 class MultiDecoder(object):
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122 """
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123 From RFC7231:
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124 If one or more encodings have been applied to a representation, the
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125 sender that applied the encodings MUST generate a Content-Encoding
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126 header field that lists the content codings in the order in which
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127 they were applied.
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128 """
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129
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130 def __init__(self, modes):
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131 self._decoders = [_get_decoder(m.strip()) for m in modes.split(",")]
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132
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133 def flush(self):
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134 return self._decoders[0].flush()
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135
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136 def decompress(self, data):
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137 for d in reversed(self._decoders):
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138 data = d.decompress(data)
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139 return data
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140
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141
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142 def _get_decoder(mode):
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143 if "," in mode:
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144 return MultiDecoder(mode)
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145
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146 if mode == "gzip":
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147 return GzipDecoder()
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148
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149 if brotli is not None and mode == "br":
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150 return BrotliDecoder()
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151
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152 return DeflateDecoder()
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153
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154
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155 class HTTPResponse(io.IOBase):
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156 """
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157 HTTP Response container.
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158
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159 Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
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160 loaded and decoded on-demand when the ``data`` property is accessed. This
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161 class is also compatible with the Python standard library's :mod:`io`
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162 module, and can hence be treated as a readable object in the context of that
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163 framework.
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164
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165 Extra parameters for behaviour not present in httplib.HTTPResponse:
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166
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167 :param preload_content:
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168 If True, the response's body will be preloaded during construction.
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169
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170 :param decode_content:
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171 If True, will attempt to decode the body based on the
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172 'content-encoding' header.
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173
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174 :param original_response:
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175 When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
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176 object, it's convenient to include the original for debug purposes. It's
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177 otherwise unused.
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178
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179 :param retries:
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180 The retries contains the last :class:`~urllib3.util.retry.Retry` that
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181 was used during the request.
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182
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183 :param enforce_content_length:
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184 Enforce content length checking. Body returned by server must match
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185 value of Content-Length header, if present. Otherwise, raise error.
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186 """
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187
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188 CONTENT_DECODERS = ["gzip", "deflate"]
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189 if brotli is not None:
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190 CONTENT_DECODERS += ["br"]
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191 REDIRECT_STATUSES = [301, 302, 303, 307, 308]
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192
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193 def __init__(
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194 self,
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195 body="",
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196 headers=None,
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197 status=0,
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198 version=0,
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199 reason=None,
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200 strict=0,
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201 preload_content=True,
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202 decode_content=True,
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203 original_response=None,
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204 pool=None,
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205 connection=None,
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206 msg=None,
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207 retries=None,
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208 enforce_content_length=False,
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209 request_method=None,
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210 request_url=None,
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211 auto_close=True,
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212 ):
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213
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214 if isinstance(headers, HTTPHeaderDict):
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215 self.headers = headers
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216 else:
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217 self.headers = HTTPHeaderDict(headers)
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218 self.status = status
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219 self.version = version
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220 self.reason = reason
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221 self.strict = strict
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222 self.decode_content = decode_content
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223 self.retries = retries
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224 self.enforce_content_length = enforce_content_length
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225 self.auto_close = auto_close
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226
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227 self._decoder = None
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228 self._body = None
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229 self._fp = None
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230 self._original_response = original_response
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231 self._fp_bytes_read = 0
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232 self.msg = msg
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233 self._request_url = request_url
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234
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235 if body and isinstance(body, (basestring, bytes)):
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236 self._body = body
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237
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238 self._pool = pool
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239 self._connection = connection
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240
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241 if hasattr(body, "read"):
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242 self._fp = body
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243
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244 # Are we using the chunked-style of transfer encoding?
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245 self.chunked = False
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246 self.chunk_left = None
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247 tr_enc = self.headers.get("transfer-encoding", "").lower()
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248 # Don't incur the penalty of creating a list and then discarding it
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249 encodings = (enc.strip() for enc in tr_enc.split(","))
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250 if "chunked" in encodings:
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251 self.chunked = True
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252
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253 # Determine length of response
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254 self.length_remaining = self._init_length(request_method)
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255
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256 # If requested, preload the body.
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257 if preload_content and not self._body:
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258 self._body = self.read(decode_content=decode_content)
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259
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260 def get_redirect_location(self):
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261 """
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262 Should we redirect and where to?
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263
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264 :returns: Truthy redirect location string if we got a redirect status
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265 code and valid location. ``None`` if redirect status and no
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266 location. ``False`` if not a redirect status code.
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267 """
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268 if self.status in self.REDIRECT_STATUSES:
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269 return self.headers.get("location")
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270
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271 return False
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272
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273 def release_conn(self):
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274 if not self._pool or not self._connection:
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275 return
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276
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277 self._pool._put_conn(self._connection)
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278 self._connection = None
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279
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280 def drain_conn(self):
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281 """
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282 Read and discard any remaining HTTP response data in the response connection.
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283
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284 Unread data in the HTTPResponse connection blocks the connection from being released back to the pool.
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285 """
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286 try:
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287 self.read()
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288 except (HTTPError, SocketError, BaseSSLError, HTTPException):
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289 pass
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290
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291 @property
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292 def data(self):
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293 # For backwords-compat with earlier urllib3 0.4 and earlier.
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294 if self._body:
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295 return self._body
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296
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297 if self._fp:
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298 return self.read(cache_content=True)
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299
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300 @property
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301 def connection(self):
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302 return self._connection
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303
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304 def isclosed(self):
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305 return is_fp_closed(self._fp)
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306
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307 def tell(self):
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308 """
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309 Obtain the number of bytes pulled over the wire so far. May differ from
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310 the amount of content returned by :meth:``HTTPResponse.read`` if bytes
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311 are encoded on the wire (e.g, compressed).
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312 """
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313 return self._fp_bytes_read
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314
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315 def _init_length(self, request_method):
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316 """
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317 Set initial length value for Response content if available.
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318 """
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319 length = self.headers.get("content-length")
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320
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321 if length is not None:
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322 if self.chunked:
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323 # This Response will fail with an IncompleteRead if it can't be
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324 # received as chunked. This method falls back to attempt reading
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325 # the response before raising an exception.
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326 log.warning(
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327 "Received response with both Content-Length and "
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328 "Transfer-Encoding set. This is expressly forbidden "
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329 "by RFC 7230 sec 3.3.2. Ignoring Content-Length and "
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330 "attempting to process response as Transfer-Encoding: "
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331 "chunked."
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332 )
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333 return None
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334
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335 try:
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336 # RFC 7230 section 3.3.2 specifies multiple content lengths can
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337 # be sent in a single Content-Length header
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338 # (e.g. Content-Length: 42, 42). This line ensures the values
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339 # are all valid ints and that as long as the `set` length is 1,
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340 # all values are the same. Otherwise, the header is invalid.
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341 lengths = set([int(val) for val in length.split(",")])
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342 if len(lengths) > 1:
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343 raise InvalidHeader(
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344 "Content-Length contained multiple "
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345 "unmatching values (%s)" % length
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346 )
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347 length = lengths.pop()
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348 except ValueError:
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349 length = None
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350 else:
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351 if length < 0:
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352 length = None
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353
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354 # Convert status to int for comparison
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355 # In some cases, httplib returns a status of "_UNKNOWN"
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356 try:
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357 status = int(self.status)
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358 except ValueError:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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359 status = 0
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360
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361 # Check for responses that shouldn't include a body
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362 if status in (204, 304) or 100 <= status < 200 or request_method == "HEAD":
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363 length = 0
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364
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365 return length
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366
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367 def _init_decoder(self):
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368 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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369 Set-up the _decoder attribute if necessary.
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370 """
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371 # Note: content-encoding value should be case-insensitive, per RFC 7230
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372 # Section 3.2
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373 content_encoding = self.headers.get("content-encoding", "").lower()
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374 if self._decoder is None:
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375 if content_encoding in self.CONTENT_DECODERS:
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376 self._decoder = _get_decoder(content_encoding)
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377 elif "," in content_encoding:
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378 encodings = [
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379 e.strip()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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380 for e in content_encoding.split(",")
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381 if e.strip() in self.CONTENT_DECODERS
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382 ]
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383 if len(encodings):
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384 self._decoder = _get_decoder(content_encoding)
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385
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386 DECODER_ERROR_CLASSES = (IOError, zlib.error)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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387 if brotli is not None:
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388 DECODER_ERROR_CLASSES += (brotli.error,)
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389
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390 def _decode(self, data, decode_content, flush_decoder):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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391 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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392 Decode the data passed in and potentially flush the decoder.
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393 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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394 if not decode_content:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
395 return data
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396
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diff changeset
397 try:
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398 if self._decoder:
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399 data = self._decoder.decompress(data)
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400 except self.DECODER_ERROR_CLASSES as e:
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401 content_encoding = self.headers.get("content-encoding", "").lower()
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diff changeset
402 raise DecodeError(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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403 "Received response with content-encoding: %s, but "
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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diff changeset
404 "failed to decode it." % content_encoding,
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diff changeset
405 e,
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406 )
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407 if flush_decoder:
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408 data += self._flush_decoder()
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409
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410 return data
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411
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412 def _flush_decoder(self):
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413 """
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414 Flushes the decoder. Should only be called if the decoder is actually
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415 being used.
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416 """
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417 if self._decoder:
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418 buf = self._decoder.decompress(b"")
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419 return buf + self._decoder.flush()
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420
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421 return b""
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422
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423 @contextmanager
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424 def _error_catcher(self):
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425 """
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426 Catch low-level python exceptions, instead re-raising urllib3
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427 variants, so that low-level exceptions are not leaked in the
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428 high-level api.
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429
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430 On exit, release the connection back to the pool.
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431 """
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432 clean_exit = False
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433
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434 try:
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435 try:
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436 yield
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437
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438 except SocketTimeout:
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439 # FIXME: Ideally we'd like to include the url in the ReadTimeoutError but
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440 # there is yet no clean way to get at it from this context.
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441 raise ReadTimeoutError(self._pool, None, "Read timed out.")
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442
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443 except BaseSSLError as e:
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444 # FIXME: Is there a better way to differentiate between SSLErrors?
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445 if "read operation timed out" not in str(e): # Defensive:
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446 # This shouldn't happen but just in case we're missing an edge
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447 # case, let's avoid swallowing SSL errors.
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448 raise
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449
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450 raise ReadTimeoutError(self._pool, None, "Read timed out.")
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451
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452 except (HTTPException, SocketError) as e:
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453 # This includes IncompleteRead.
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454 raise ProtocolError("Connection broken: %r" % e, e)
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455
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456 # If no exception is thrown, we should avoid cleaning up
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457 # unnecessarily.
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458 clean_exit = True
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459 finally:
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460 # If we didn't terminate cleanly, we need to throw away our
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461 # connection.
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462 if not clean_exit:
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463 # The response may not be closed but we're not going to use it
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464 # anymore so close it now to ensure that the connection is
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465 # released back to the pool.
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466 if self._original_response:
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467 self._original_response.close()
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468
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469 # Closing the response may not actually be sufficient to close
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diff changeset
470 # everything, so if we have a hold of the connection close that
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diff changeset
471 # too.
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472 if self._connection:
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473 self._connection.close()
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474
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475 # If we hold the original response but it's closed now, we should
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diff changeset
476 # return the connection back to the pool.
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477 if self._original_response and self._original_response.isclosed():
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478 self.release_conn()
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479
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480 def read(self, amt=None, decode_content=None, cache_content=False):
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481 """
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482 Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
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483 parameters: ``decode_content`` and ``cache_content``.
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484
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485 :param amt:
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486 How much of the content to read. If specified, caching is skipped
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487 because it doesn't make sense to cache partial content as the full
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488 response.
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489
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490 :param decode_content:
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491 If True, will attempt to decode the body based on the
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492 'content-encoding' header.
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493
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494 :param cache_content:
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495 If True, will save the returned data such that the same result is
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496 returned despite of the state of the underlying file object. This
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497 is useful if you want the ``.data`` property to continue working
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498 after having ``.read()`` the file object. (Overridden if ``amt`` is
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499 set.)
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500 """
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501 self._init_decoder()
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502 if decode_content is None:
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503 decode_content = self.decode_content
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504
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505 if self._fp is None:
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506 return
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507
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508 flush_decoder = False
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509 fp_closed = getattr(self._fp, "closed", False)
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510
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511 with self._error_catcher():
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512 if amt is None:
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513 # cStringIO doesn't like amt=None
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514 data = self._fp.read() if not fp_closed else b""
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515 flush_decoder = True
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516 else:
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517 cache_content = False
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518 data = self._fp.read(amt) if not fp_closed else b""
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519 if (
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520 amt != 0 and not data
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521 ): # Platform-specific: Buggy versions of Python.
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522 # Close the connection when no data is returned
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523 #
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524 # This is redundant to what httplib/http.client _should_
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525 # already do. However, versions of python released before
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526 # December 15, 2012 (http://bugs.python.org/issue16298) do
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527 # not properly close the connection in all cases. There is
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528 # no harm in redundantly calling close.
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529 self._fp.close()
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530 flush_decoder = True
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531 if self.enforce_content_length and self.length_remaining not in (
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532 0,
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533 None,
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534 ):
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535 # This is an edge case that httplib failed to cover due
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536 # to concerns of backward compatibility. We're
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537 # addressing it here to make sure IncompleteRead is
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538 # raised during streaming, so all calls with incorrect
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539 # Content-Length are caught.
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540 raise IncompleteRead(self._fp_bytes_read, self.length_remaining)
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541
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542 if data:
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543 self._fp_bytes_read += len(data)
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544 if self.length_remaining is not None:
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545 self.length_remaining -= len(data)
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546
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547 data = self._decode(data, decode_content, flush_decoder)
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548
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549 if cache_content:
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550 self._body = data
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551
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552 return data
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553
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554 def stream(self, amt=2 ** 16, decode_content=None):
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555 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
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556 A generator wrapper for the read() method. A call will block until
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557 ``amt`` bytes have been read from the connection or until the
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558 connection is closed.
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559
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560 :param amt:
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561 How much of the content to read. The generator will return up to
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562 much data per iteration, but may return less. This is particularly
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563 likely when using compressed data. However, the empty string will
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564 never be returned.
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565
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566 :param decode_content:
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567 If True, will attempt to decode the body based on the
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568 'content-encoding' header.
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569 """
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570 if self.chunked and self.supports_chunked_reads():
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571 for line in self.read_chunked(amt, decode_content=decode_content):
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572 yield line
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573 else:
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574 while not is_fp_closed(self._fp):
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575 data = self.read(amt=amt, decode_content=decode_content)
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576
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577 if data:
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578 yield data
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579
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580 @classmethod
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581 def from_httplib(ResponseCls, r, **response_kw):
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582 """
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583 Given an :class:`httplib.HTTPResponse` instance ``r``, return a
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584 corresponding :class:`urllib3.response.HTTPResponse` object.
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585
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586 Remaining parameters are passed to the HTTPResponse constructor, along
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587 with ``original_response=r``.
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588 """
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589 headers = r.msg
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590
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591 if not isinstance(headers, HTTPHeaderDict):
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592 if PY3:
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593 headers = HTTPHeaderDict(headers.items())
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594 else:
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595 # Python 2.7
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596 headers = HTTPHeaderDict.from_httplib(headers)
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597
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598 # HTTPResponse objects in Python 3 don't have a .strict attribute
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599 strict = getattr(r, "strict", 0)
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600 resp = ResponseCls(
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601 body=r,
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602 headers=headers,
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603 status=r.status,
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604 version=r.version,
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605 reason=r.reason,
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606 strict=strict,
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607 original_response=r,
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608 **response_kw
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609 )
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610 return resp
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611
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612 # Backwards-compatibility methods for httplib.HTTPResponse
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613 def getheaders(self):
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614 return self.headers
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615
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616 def getheader(self, name, default=None):
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617 return self.headers.get(name, default)
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618
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619 # Backwards compatibility for http.cookiejar
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620 def info(self):
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621 return self.headers
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622
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623 # Overrides from io.IOBase
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624 def close(self):
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625 if not self.closed:
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626 self._fp.close()
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627
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628 if self._connection:
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629 self._connection.close()
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630
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631 if not self.auto_close:
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632 io.IOBase.close(self)
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633
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634 @property
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635 def closed(self):
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636 if not self.auto_close:
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637 return io.IOBase.closed.__get__(self)
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638 elif self._fp is None:
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639 return True
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640 elif hasattr(self._fp, "isclosed"):
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641 return self._fp.isclosed()
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642 elif hasattr(self._fp, "closed"):
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643 return self._fp.closed
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644 else:
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645 return True
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646
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647 def fileno(self):
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648 if self._fp is None:
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649 raise IOError("HTTPResponse has no file to get a fileno from")
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650 elif hasattr(self._fp, "fileno"):
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651 return self._fp.fileno()
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652 else:
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653 raise IOError(
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654 "The file-like object this HTTPResponse is wrapped "
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655 "around has no file descriptor"
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656 )
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657
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diff changeset
658 def flush(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
659 if (
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
660 self._fp is not None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
661 and hasattr(self._fp, "flush")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
662 and not getattr(self._fp, "closed", False)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
663 ):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
664 return self._fp.flush()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
665
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
666 def readable(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
667 # This method is required for `io` module compatibility.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
668 return True
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
669
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
670 def readinto(self, b):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
671 # This method is required for `io` module compatibility.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
672 temp = self.read(len(b))
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
673 if len(temp) == 0:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
674 return 0
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
675 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
676 b[: len(temp)] = temp
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
677 return len(temp)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
678
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
679 def supports_chunked_reads(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
680 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
681 Checks if the underlying file-like object looks like a
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
682 httplib.HTTPResponse object. We do this by testing for the fp
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
683 attribute. If it is present we assume it returns raw chunks as
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
684 processed by read_chunked().
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
685 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
686 return hasattr(self._fp, "fp")
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
687
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
688 def _update_chunk_length(self):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
689 # First, we'll figure out length of a chunk and then
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
690 # we'll try to read it from socket.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
691 if self.chunk_left is not None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
692 return
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
693 line = self._fp.fp.readline()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
694 line = line.split(b";", 1)[0]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
695 try:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
696 self.chunk_left = int(line, 16)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
697 except ValueError:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
698 # Invalid chunked protocol response, abort.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
699 self.close()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
700 raise httplib.IncompleteRead(line)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
701
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
702 def _handle_chunk(self, amt):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
703 returned_chunk = None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
704 if amt is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
705 chunk = self._fp._safe_read(self.chunk_left)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
706 returned_chunk = chunk
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
707 self._fp._safe_read(2) # Toss the CRLF at the end of the chunk.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
708 self.chunk_left = None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
709 elif amt < self.chunk_left:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
710 value = self._fp._safe_read(amt)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
711 self.chunk_left = self.chunk_left - amt
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
712 returned_chunk = value
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
713 elif amt == self.chunk_left:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
714 value = self._fp._safe_read(amt)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
715 self._fp._safe_read(2) # Toss the CRLF at the end of the chunk.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
716 self.chunk_left = None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
717 returned_chunk = value
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
718 else: # amt > self.chunk_left
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
719 returned_chunk = self._fp._safe_read(self.chunk_left)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
720 self._fp._safe_read(2) # Toss the CRLF at the end of the chunk.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
721 self.chunk_left = None
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
722 return returned_chunk
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
723
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
724 def read_chunked(self, amt=None, decode_content=None):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
725 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
726 Similar to :meth:`HTTPResponse.read`, but with an additional
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
727 parameter: ``decode_content``.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
728
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
729 :param amt:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
730 How much of the content to read. If specified, caching is skipped
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
731 because it doesn't make sense to cache partial content as the full
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
732 response.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
733
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
734 :param decode_content:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
735 If True, will attempt to decode the body based on the
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
736 'content-encoding' header.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
737 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
738 self._init_decoder()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
739 # FIXME: Rewrite this method and make it a class with a better structured logic.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
740 if not self.chunked:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
741 raise ResponseNotChunked(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
742 "Response is not chunked. "
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
743 "Header 'transfer-encoding: chunked' is missing."
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
744 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
745 if not self.supports_chunked_reads():
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
746 raise BodyNotHttplibCompatible(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
747 "Body should be httplib.HTTPResponse like. "
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
748 "It should have have an fp attribute which returns raw chunks."
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
749 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
750
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
751 with self._error_catcher():
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
752 # Don't bother reading the body of a HEAD request.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
753 if self._original_response and is_response_to_head(self._original_response):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
754 self._original_response.close()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
755 return
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
756
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
757 # If a response is already read and closed
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
758 # then return immediately.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
759 if self._fp.fp is None:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
760 return
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
761
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
762 while True:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
763 self._update_chunk_length()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
764 if self.chunk_left == 0:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
765 break
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
766 chunk = self._handle_chunk(amt)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
767 decoded = self._decode(
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
768 chunk, decode_content=decode_content, flush_decoder=False
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
769 )
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
770 if decoded:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
771 yield decoded
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
772
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
773 if decode_content:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
774 # On CPython and PyPy, we should never need to flush the
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
775 # decoder. However, on Jython we *might* need to, so
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
776 # lets defensively do it anyway.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
777 decoded = self._flush_decoder()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
778 if decoded: # Platform-specific: Jython.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
779 yield decoded
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
780
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
781 # Chunk content ends with \r\n: discard it.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
782 while True:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
783 line = self._fp.fp.readline()
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
784 if not line:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
785 # Some sites may not end with '\r\n'.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
786 break
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
787 if line == b"\r\n":
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
788 break
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
789
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
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diff changeset
790 # We read everything; close the "file".
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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791 if self._original_response:
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guerler
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792 self._original_response.close()
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guerler
parents:
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793
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guerler
parents:
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794 def geturl(self):
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guerler
parents:
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795 """
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
796 Returns the URL that was the source of this response.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
797 If the request that generated this response redirected, this method
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
798 will return the final redirect location.
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
799 """
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guerler
parents:
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800 if self.retries is not None and len(self.retries.history):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
801 return self.retries.history[-1].redirect_location
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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802 else:
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guerler
parents:
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803 return self._request_url
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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804
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guerler
parents:
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805 def __iter__(self):
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guerler
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806 buffer = []
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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807 for chunk in self.stream(decode_content=True):
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
808 if b"\n" in chunk:
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guerler
parents:
diff changeset
809 chunk = chunk.split(b"\n")
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guerler
parents:
diff changeset
810 yield b"".join(buffer) + chunk[0] + b"\n"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
811 for x in chunk[1:-1]:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
812 yield x + b"\n"
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
813 if chunk[-1]:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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814 buffer = [chunk[-1]]
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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815 else:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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816 buffer = []
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
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817 else:
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guerler
parents:
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818 buffer.append(chunk)
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
819 if buffer:
56ad4e20f292 "planemo upload commit 6eee67778febed82ddd413c3ca40b3183a3898f1"
guerler
parents:
diff changeset
820 yield b"".join(buffer)