/usr/share/pyshared/requests/packages/urllib3/response.py is in python-requests 0.12.1-1+deb7u1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | # urllib3/response.py
# Copyright 2008-2012 Andrey Petrov and contributors (see CONTRIBUTORS.txt)
#
# This module is part of urllib3 and is released under
# the MIT License: http://www.opensource.org/licenses/mit-license.php
import gzip
import logging
import zlib
from io import BytesIO
from .exceptions import HTTPError
from six import string_types as basestring
log = logging.getLogger(__name__)
def decode_gzip(data):
gzipper = gzip.GzipFile(fileobj=BytesIO(data))
return gzipper.read()
def decode_deflate(data):
try:
return zlib.decompress(data)
except zlib.error:
return zlib.decompress(data, -zlib.MAX_WBITS)
class HTTPResponse(object):
"""
HTTP Response container.
Backwards-compatible to httplib's HTTPResponse but the response ``body`` is
loaded and decoded on-demand when the ``data`` property is accessed.
Extra parameters for behaviour not present in httplib.HTTPResponse:
:param preload_content:
If True, the response's body will be preloaded during construction.
:param decode_content:
If True, attempts to decode specific content-encoding's based on headers
(like 'gzip' and 'deflate') will be skipped and raw data will be used
instead.
:param original_response:
When this HTTPResponse wrapper is generated from an httplib.HTTPResponse
object, it's convenient to include the original for debug purposes. It's
otherwise unused.
"""
CONTENT_DECODERS = {
'gzip': decode_gzip,
'deflate': decode_deflate,
}
def __init__(self, body='', headers=None, status=0, version=0, reason=None,
strict=0, preload_content=True, decode_content=True,
original_response=None, pool=None, connection=None):
self.headers = headers or {}
self.status = status
self.version = version
self.reason = reason
self.strict = strict
self._decode_content = decode_content
self._body = body if body and isinstance(body, basestring) else None
self._fp = None
self._original_response = original_response
self._pool = pool
self._connection = connection
if hasattr(body, 'read'):
self._fp = body
if preload_content and not self._body:
self._body = self.read(decode_content=decode_content)
def get_redirect_location(self):
"""
Should we redirect and where to?
:returns: Truthy redirect location string if we got a redirect status
code and valid location. ``None`` if redirect status and no
location. ``False`` if not a redirect status code.
"""
if self.status in [301, 302, 303, 307]:
return self.headers.get('location')
return False
def release_conn(self):
if not self._pool or not self._connection:
return
self._pool._put_conn(self._connection)
self._connection = None
@property
def data(self):
# For backwords-compat with earlier urllib3 0.4 and earlier.
if self._body:
return self._body
if self._fp:
return self.read(cache_content=True)
def read(self, amt=None, decode_content=None, cache_content=False):
"""
Similar to :meth:`httplib.HTTPResponse.read`, but with two additional
parameters: ``decode_content`` and ``cache_content``.
:param amt:
How much of the content to read. If specified, decoding and caching
is skipped because we can't decode partial content nor does it make
sense to cache partial content as the full response.
:param decode_content:
If True, will attempt to decode the body based on the
'content-encoding' header. (Overridden if ``amt`` is set.)
:param cache_content:
If True, will save the returned data such that the same result is
returned despite of the state of the underlying file object. This
is useful if you want the ``.data`` property to continue working
after having ``.read()`` the file object. (Overridden if ``amt`` is
set.)
"""
content_encoding = self.headers.get('content-encoding')
decoder = self.CONTENT_DECODERS.get(content_encoding)
if decode_content is None:
decode_content = self._decode_content
if self._fp is None:
return
try:
if amt is None:
# cStringIO doesn't like amt=None
data = self._fp.read()
else:
return self._fp.read(amt)
try:
if decode_content and decoder:
data = decoder(data)
except IOError:
raise HTTPError("Received response with content-encoding: %s, but "
"failed to decode it." % content_encoding)
if cache_content:
self._body = data
return data
finally:
if self._original_response and self._original_response.isclosed():
self.release_conn()
@classmethod
def from_httplib(ResponseCls, r, **response_kw):
"""
Given an :class:`httplib.HTTPResponse` instance ``r``, return a
corresponding :class:`urllib3.response.HTTPResponse` object.
Remaining parameters are passed to the HTTPResponse constructor, along
with ``original_response=r``.
"""
# Normalize headers between different versions of Python
headers = {}
for k, v in r.getheaders():
# Python 3: Header keys are returned capitalised
k = k.lower()
has_value = headers.get(k)
if has_value: # Python 3: Repeating header keys are unmerged.
v = ', '.join([has_value, v])
headers[k] = v
# HTTPResponse objects in Python 3 don't have a .strict attribute
strict = getattr(r, 'strict', 0)
return ResponseCls(body=r,
headers=headers,
status=r.status,
version=r.version,
reason=r.reason,
strict=strict,
original_response=r,
**response_kw)
# Backwards-compatibility methods for httplib.HTTPResponse
def getheaders(self):
return self.headers
def getheader(self, name, default=None):
return self.headers.get(name, default)
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