957 lines
34 KiB
Python
957 lines
34 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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requests.models
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~~~~~~~~~~~~~~~
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This module contains the primary objects that power Requests.
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"""
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import datetime
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import sys
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# Import encoding now, to avoid implicit import later.
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# Implicit import within threads may cause LookupError when standard library is in a ZIP,
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# such as in Embedded Python. See https://github.com/psf/requests/issues/3578.
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import encodings.idna
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from urllib3.fields import RequestField
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from urllib3.filepost import encode_multipart_formdata
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from urllib3.util import parse_url
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from urllib3.exceptions import (
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DecodeError, ReadTimeoutError, ProtocolError, LocationParseError)
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from io import UnsupportedOperation
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from .hooks import default_hooks
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from .structures import CaseInsensitiveDict
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from .auth import HTTPBasicAuth
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from .cookies import cookiejar_from_dict, get_cookie_header, _copy_cookie_jar
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from .exceptions import (
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HTTPError, MissingSchema, InvalidURL, ChunkedEncodingError,
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ContentDecodingError, ConnectionError, StreamConsumedError)
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from ._internal_utils import to_native_string, unicode_is_ascii
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from .utils import (
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guess_filename, get_auth_from_url, requote_uri,
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stream_decode_response_unicode, to_key_val_list, parse_header_links,
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iter_slices, guess_json_utf, super_len, check_header_validity)
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from .compat import (
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Callable, Mapping,
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cookielib, urlunparse, urlsplit, urlencode, str, bytes,
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is_py2, chardet, builtin_str, basestring)
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from .compat import json as complexjson
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from .status_codes import codes
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#: The set of HTTP status codes that indicate an automatically
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#: processable redirect.
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REDIRECT_STATI = (
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codes.moved, # 301
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codes.found, # 302
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codes.other, # 303
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codes.temporary_redirect, # 307
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codes.permanent_redirect, # 308
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)
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DEFAULT_REDIRECT_LIMIT = 30
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CONTENT_CHUNK_SIZE = 10 * 1024
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ITER_CHUNK_SIZE = 512
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class RequestEncodingMixin(object):
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@property
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def path_url(self):
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"""Build the path URL to use."""
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url = []
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p = urlsplit(self.url)
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path = p.path
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if not path:
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path = '/'
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url.append(path)
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query = p.query
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if query:
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url.append('?')
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url.append(query)
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return ''.join(url)
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@staticmethod
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def _encode_params(data):
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"""Encode parameters in a piece of data.
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Will successfully encode parameters when passed as a dict or a list of
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2-tuples. Order is retained if data is a list of 2-tuples but arbitrary
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if parameters are supplied as a dict.
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"""
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if isinstance(data, (str, bytes)):
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return data
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elif hasattr(data, 'read'):
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return data
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elif hasattr(data, '__iter__'):
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result = []
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for k, vs in to_key_val_list(data):
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if isinstance(vs, basestring) or not hasattr(vs, '__iter__'):
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vs = [vs]
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for v in vs:
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if v is not None:
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result.append(
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(k.encode('utf-8') if isinstance(k, str) else k,
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v.encode('utf-8') if isinstance(v, str) else v))
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return urlencode(result, doseq=True)
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else:
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return data
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@staticmethod
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def _encode_files(files, data):
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"""Build the body for a multipart/form-data request.
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Will successfully encode files when passed as a dict or a list of
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tuples. Order is retained if data is a list of tuples but arbitrary
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if parameters are supplied as a dict.
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The tuples may be 2-tuples (filename, fileobj), 3-tuples (filename, fileobj, contentype)
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or 4-tuples (filename, fileobj, contentype, custom_headers).
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"""
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if (not files):
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raise ValueError("Files must be provided.")
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elif isinstance(data, basestring):
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raise ValueError("Data must not be a string.")
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new_fields = []
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fields = to_key_val_list(data or {})
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files = to_key_val_list(files or {})
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for field, val in fields:
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if isinstance(val, basestring) or not hasattr(val, '__iter__'):
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val = [val]
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for v in val:
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if v is not None:
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# Don't call str() on bytestrings: in Py3 it all goes wrong.
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if not isinstance(v, bytes):
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v = str(v)
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new_fields.append(
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(field.decode('utf-8') if isinstance(field, bytes) else field,
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v.encode('utf-8') if isinstance(v, str) else v))
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for (k, v) in files:
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# support for explicit filename
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ft = None
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fh = None
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if isinstance(v, (tuple, list)):
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if len(v) == 2:
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fn, fp = v
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elif len(v) == 3:
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fn, fp, ft = v
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else:
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fn, fp, ft, fh = v
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else:
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fn = guess_filename(v) or k
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fp = v
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if isinstance(fp, (str, bytes, bytearray)):
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fdata = fp
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elif hasattr(fp, 'read'):
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fdata = fp.read()
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elif fp is None:
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continue
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else:
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fdata = fp
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rf = RequestField(name=k, data=fdata, filename=fn, headers=fh)
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rf.make_multipart(content_type=ft)
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new_fields.append(rf)
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body, content_type = encode_multipart_formdata(new_fields)
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return body, content_type
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class RequestHooksMixin(object):
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def register_hook(self, event, hook):
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"""Properly register a hook."""
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if event not in self.hooks:
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raise ValueError('Unsupported event specified, with event name "%s"' % (event))
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if isinstance(hook, Callable):
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self.hooks[event].append(hook)
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elif hasattr(hook, '__iter__'):
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self.hooks[event].extend(h for h in hook if isinstance(h, Callable))
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def deregister_hook(self, event, hook):
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"""Deregister a previously registered hook.
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Returns True if the hook existed, False if not.
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"""
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try:
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self.hooks[event].remove(hook)
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return True
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except ValueError:
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return False
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class Request(RequestHooksMixin):
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"""A user-created :class:`Request <Request>` object.
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Used to prepare a :class:`PreparedRequest <PreparedRequest>`, which is sent to the server.
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:param method: HTTP method to use.
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:param url: URL to send.
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:param headers: dictionary of headers to send.
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:param files: dictionary of {filename: fileobject} files to multipart upload.
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:param data: the body to attach to the request. If a dictionary or
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list of tuples ``[(key, value)]`` is provided, form-encoding will
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take place.
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:param json: json for the body to attach to the request (if files or data is not specified).
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:param params: URL parameters to append to the URL. If a dictionary or
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list of tuples ``[(key, value)]`` is provided, form-encoding will
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take place.
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:param auth: Auth handler or (user, pass) tuple.
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:param cookies: dictionary or CookieJar of cookies to attach to this request.
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:param hooks: dictionary of callback hooks, for internal usage.
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Usage::
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>>> import requests
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>>> req = requests.Request('GET', 'https://httpbin.org/get')
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>>> req.prepare()
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<PreparedRequest [GET]>
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"""
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def __init__(self,
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method=None, url=None, headers=None, files=None, data=None,
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params=None, auth=None, cookies=None, hooks=None, json=None):
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# Default empty dicts for dict params.
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data = [] if data is None else data
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files = [] if files is None else files
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headers = {} if headers is None else headers
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params = {} if params is None else params
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hooks = {} if hooks is None else hooks
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self.hooks = default_hooks()
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for (k, v) in list(hooks.items()):
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self.register_hook(event=k, hook=v)
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self.method = method
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self.url = url
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self.headers = headers
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self.files = files
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self.data = data
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self.json = json
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self.params = params
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self.auth = auth
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self.cookies = cookies
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def __repr__(self):
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return '<Request [%s]>' % (self.method)
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def prepare(self):
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"""Constructs a :class:`PreparedRequest <PreparedRequest>` for transmission and returns it."""
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p = PreparedRequest()
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p.prepare(
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method=self.method,
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url=self.url,
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headers=self.headers,
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files=self.files,
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data=self.data,
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json=self.json,
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params=self.params,
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auth=self.auth,
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cookies=self.cookies,
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hooks=self.hooks,
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)
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return p
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class PreparedRequest(RequestEncodingMixin, RequestHooksMixin):
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"""The fully mutable :class:`PreparedRequest <PreparedRequest>` object,
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containing the exact bytes that will be sent to the server.
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Instances are generated from a :class:`Request <Request>` object, and
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should not be instantiated manually; doing so may produce undesirable
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effects.
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Usage::
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>>> import requests
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>>> req = requests.Request('GET', 'https://httpbin.org/get')
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>>> r = req.prepare()
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>>> r
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<PreparedRequest [GET]>
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>>> s = requests.Session()
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>>> s.send(r)
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<Response [200]>
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"""
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def __init__(self):
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#: HTTP verb to send to the server.
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self.method = None
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#: HTTP URL to send the request to.
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self.url = None
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#: dictionary of HTTP headers.
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self.headers = None
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# The `CookieJar` used to create the Cookie header will be stored here
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# after prepare_cookies is called
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self._cookies = None
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#: request body to send to the server.
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self.body = None
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#: dictionary of callback hooks, for internal usage.
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self.hooks = default_hooks()
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#: integer denoting starting position of a readable file-like body.
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self._body_position = None
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def prepare(self,
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method=None, url=None, headers=None, files=None, data=None,
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params=None, auth=None, cookies=None, hooks=None, json=None):
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"""Prepares the entire request with the given parameters."""
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self.prepare_method(method)
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self.prepare_url(url, params)
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self.prepare_headers(headers)
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self.prepare_cookies(cookies)
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self.prepare_body(data, files, json)
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self.prepare_auth(auth, url)
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# Note that prepare_auth must be last to enable authentication schemes
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# such as OAuth to work on a fully prepared request.
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# This MUST go after prepare_auth. Authenticators could add a hook
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self.prepare_hooks(hooks)
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def __repr__(self):
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return '<PreparedRequest [%s]>' % (self.method)
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def copy(self):
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p = PreparedRequest()
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p.method = self.method
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p.url = self.url
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p.headers = self.headers.copy() if self.headers is not None else None
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p._cookies = _copy_cookie_jar(self._cookies)
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p.body = self.body
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p.hooks = self.hooks
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p._body_position = self._body_position
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return p
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def prepare_method(self, method):
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"""Prepares the given HTTP method."""
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self.method = method
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if self.method is not None:
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self.method = to_native_string(self.method.upper())
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@staticmethod
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def _get_idna_encoded_host(host):
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import idna
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try:
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host = idna.encode(host, uts46=True).decode('utf-8')
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except idna.IDNAError:
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raise UnicodeError
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return host
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def prepare_url(self, url, params):
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"""Prepares the given HTTP URL."""
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#: Accept objects that have string representations.
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#: We're unable to blindly call unicode/str functions
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#: as this will include the bytestring indicator (b'')
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#: on python 3.x.
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#: https://github.com/psf/requests/pull/2238
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if isinstance(url, bytes):
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url = url.decode('utf8')
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else:
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url = unicode(url) if is_py2 else str(url)
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# Remove leading whitespaces from url
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url = url.lstrip()
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# Don't do any URL preparation for non-HTTP schemes like `mailto`,
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# `data` etc to work around exceptions from `url_parse`, which
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# handles RFC 3986 only.
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if ':' in url and not url.lower().startswith('http'):
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self.url = url
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return
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# Support for unicode domain names and paths.
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try:
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scheme, auth, host, port, path, query, fragment = parse_url(url)
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except LocationParseError as e:
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raise InvalidURL(*e.args)
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if not scheme:
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||
|
|
error = ("Invalid URL {0!r}: No schema supplied. Perhaps you meant http://{0}?")
|
||
|
|
error = error.format(to_native_string(url, 'utf8'))
|
||
|
|
|
||
|
|
raise MissingSchema(error)
|
||
|
|
|
||
|
|
if not host:
|
||
|
|
raise InvalidURL("Invalid URL %r: No host supplied" % url)
|
||
|
|
|
||
|
|
# In general, we want to try IDNA encoding the hostname if the string contains
|
||
|
|
# non-ASCII characters. This allows users to automatically get the correct IDNA
|
||
|
|
# behaviour. For strings containing only ASCII characters, we need to also verify
|
||
|
|
# it doesn't start with a wildcard (*), before allowing the unencoded hostname.
|
||
|
|
if not unicode_is_ascii(host):
|
||
|
|
try:
|
||
|
|
host = self._get_idna_encoded_host(host)
|
||
|
|
except UnicodeError:
|
||
|
|
raise InvalidURL('URL has an invalid label.')
|
||
|
|
elif host.startswith(u'*'):
|
||
|
|
raise InvalidURL('URL has an invalid label.')
|
||
|
|
|
||
|
|
# Carefully reconstruct the network location
|
||
|
|
netloc = auth or ''
|
||
|
|
if netloc:
|
||
|
|
netloc += '@'
|
||
|
|
netloc += host
|
||
|
|
if port:
|
||
|
|
netloc += ':' + str(port)
|
||
|
|
|
||
|
|
# Bare domains aren't valid URLs.
|
||
|
|
if not path:
|
||
|
|
path = '/'
|
||
|
|
|
||
|
|
if is_py2:
|
||
|
|
if isinstance(scheme, str):
|
||
|
|
scheme = scheme.encode('utf-8')
|
||
|
|
if isinstance(netloc, str):
|
||
|
|
netloc = netloc.encode('utf-8')
|
||
|
|
if isinstance(path, str):
|
||
|
|
path = path.encode('utf-8')
|
||
|
|
if isinstance(query, str):
|
||
|
|
query = query.encode('utf-8')
|
||
|
|
if isinstance(fragment, str):
|
||
|
|
fragment = fragment.encode('utf-8')
|
||
|
|
|
||
|
|
if isinstance(params, (str, bytes)):
|
||
|
|
params = to_native_string(params)
|
||
|
|
|
||
|
|
enc_params = self._encode_params(params)
|
||
|
|
if enc_params:
|
||
|
|
if query:
|
||
|
|
query = '%s&%s' % (query, enc_params)
|
||
|
|
else:
|
||
|
|
query = enc_params
|
||
|
|
|
||
|
|
url = requote_uri(urlunparse([scheme, netloc, path, None, query, fragment]))
|
||
|
|
self.url = url
|
||
|
|
|
||
|
|
def prepare_headers(self, headers):
|
||
|
|
"""Prepares the given HTTP headers."""
|
||
|
|
|
||
|
|
self.headers = CaseInsensitiveDict()
|
||
|
|
if headers:
|
||
|
|
for header in headers.items():
|
||
|
|
# Raise exception on invalid header value.
|
||
|
|
check_header_validity(header)
|
||
|
|
name, value = header
|
||
|
|
self.headers[to_native_string(name)] = value
|
||
|
|
|
||
|
|
def prepare_body(self, data, files, json=None):
|
||
|
|
"""Prepares the given HTTP body data."""
|
||
|
|
|
||
|
|
# Check if file, fo, generator, iterator.
|
||
|
|
# If not, run through normal process.
|
||
|
|
|
||
|
|
# Nottin' on you.
|
||
|
|
body = None
|
||
|
|
content_type = None
|
||
|
|
|
||
|
|
if not data and json is not None:
|
||
|
|
# urllib3 requires a bytes-like body. Python 2's json.dumps
|
||
|
|
# provides this natively, but Python 3 gives a Unicode string.
|
||
|
|
content_type = 'application/json'
|
||
|
|
body = complexjson.dumps(json)
|
||
|
|
if not isinstance(body, bytes):
|
||
|
|
body = body.encode('utf-8')
|
||
|
|
|
||
|
|
is_stream = all([
|
||
|
|
hasattr(data, '__iter__'),
|
||
|
|
not isinstance(data, (basestring, list, tuple, Mapping))
|
||
|
|
])
|
||
|
|
|
||
|
|
if is_stream:
|
||
|
|
try:
|
||
|
|
length = super_len(data)
|
||
|
|
except (TypeError, AttributeError, UnsupportedOperation):
|
||
|
|
length = None
|
||
|
|
|
||
|
|
body = data
|
||
|
|
|
||
|
|
if getattr(body, 'tell', None) is not None:
|
||
|
|
# Record the current file position before reading.
|
||
|
|
# This will allow us to rewind a file in the event
|
||
|
|
# of a redirect.
|
||
|
|
try:
|
||
|
|
self._body_position = body.tell()
|
||
|
|
except (IOError, OSError):
|
||
|
|
# This differentiates from None, allowing us to catch
|
||
|
|
# a failed `tell()` later when trying to rewind the body
|
||
|
|
self._body_position = object()
|
||
|
|
|
||
|
|
if files:
|
||
|
|
raise NotImplementedError('Streamed bodies and files are mutually exclusive.')
|
||
|
|
|
||
|
|
if length:
|
||
|
|
self.headers['Content-Length'] = builtin_str(length)
|
||
|
|
else:
|
||
|
|
self.headers['Transfer-Encoding'] = 'chunked'
|
||
|
|
else:
|
||
|
|
# Multi-part file uploads.
|
||
|
|
if files:
|
||
|
|
(body, content_type) = self._encode_files(files, data)
|
||
|
|
else:
|
||
|
|
if data:
|
||
|
|
body = self._encode_params(data)
|
||
|
|
if isinstance(data, basestring) or hasattr(data, 'read'):
|
||
|
|
content_type = None
|
||
|
|
else:
|
||
|
|
content_type = 'application/x-www-form-urlencoded'
|
||
|
|
|
||
|
|
self.prepare_content_length(body)
|
||
|
|
|
||
|
|
# Add content-type if it wasn't explicitly provided.
|
||
|
|
if content_type and ('content-type' not in self.headers):
|
||
|
|
self.headers['Content-Type'] = content_type
|
||
|
|
|
||
|
|
self.body = body
|
||
|
|
|
||
|
|
def prepare_content_length(self, body):
|
||
|
|
"""Prepare Content-Length header based on request method and body"""
|
||
|
|
if body is not None:
|
||
|
|
length = super_len(body)
|
||
|
|
if length:
|
||
|
|
# If length exists, set it. Otherwise, we fallback
|
||
|
|
# to Transfer-Encoding: chunked.
|
||
|
|
self.headers['Content-Length'] = builtin_str(length)
|
||
|
|
elif self.method not in ('GET', 'HEAD') and self.headers.get('Content-Length') is None:
|
||
|
|
# Set Content-Length to 0 for methods that can have a body
|
||
|
|
# but don't provide one. (i.e. not GET or HEAD)
|
||
|
|
self.headers['Content-Length'] = '0'
|
||
|
|
|
||
|
|
def prepare_auth(self, auth, url=''):
|
||
|
|
"""Prepares the given HTTP auth data."""
|
||
|
|
|
||
|
|
# If no Auth is explicitly provided, extract it from the URL first.
|
||
|
|
if auth is None:
|
||
|
|
url_auth = get_auth_from_url(self.url)
|
||
|
|
auth = url_auth if any(url_auth) else None
|
||
|
|
|
||
|
|
if auth:
|
||
|
|
if isinstance(auth, tuple) and len(auth) == 2:
|
||
|
|
# special-case basic HTTP auth
|
||
|
|
auth = HTTPBasicAuth(*auth)
|
||
|
|
|
||
|
|
# Allow auth to make its changes.
|
||
|
|
r = auth(self)
|
||
|
|
|
||
|
|
# Update self to reflect the auth changes.
|
||
|
|
self.__dict__.update(r.__dict__)
|
||
|
|
|
||
|
|
# Recompute Content-Length
|
||
|
|
self.prepare_content_length(self.body)
|
||
|
|
|
||
|
|
def prepare_cookies(self, cookies):
|
||
|
|
"""Prepares the given HTTP cookie data.
|
||
|
|
|
||
|
|
This function eventually generates a ``Cookie`` header from the
|
||
|
|
given cookies using cookielib. Due to cookielib's design, the header
|
||
|
|
will not be regenerated if it already exists, meaning this function
|
||
|
|
can only be called once for the life of the
|
||
|
|
:class:`PreparedRequest <PreparedRequest>` object. Any subsequent calls
|
||
|
|
to ``prepare_cookies`` will have no actual effect, unless the "Cookie"
|
||
|
|
header is removed beforehand.
|
||
|
|
"""
|
||
|
|
if isinstance(cookies, cookielib.CookieJar):
|
||
|
|
self._cookies = cookies
|
||
|
|
else:
|
||
|
|
self._cookies = cookiejar_from_dict(cookies)
|
||
|
|
|
||
|
|
cookie_header = get_cookie_header(self._cookies, self)
|
||
|
|
if cookie_header is not None:
|
||
|
|
self.headers['Cookie'] = cookie_header
|
||
|
|
|
||
|
|
def prepare_hooks(self, hooks):
|
||
|
|
"""Prepares the given hooks."""
|
||
|
|
# hooks can be passed as None to the prepare method and to this
|
||
|
|
# method. To prevent iterating over None, simply use an empty list
|
||
|
|
# if hooks is False-y
|
||
|
|
hooks = hooks or []
|
||
|
|
for event in hooks:
|
||
|
|
self.register_hook(event, hooks[event])
|
||
|
|
|
||
|
|
|
||
|
|
class Response(object):
|
||
|
|
"""The :class:`Response <Response>` object, which contains a
|
||
|
|
server's response to an HTTP request.
|
||
|
|
"""
|
||
|
|
|
||
|
|
__attrs__ = [
|
||
|
|
'_content', 'status_code', 'headers', 'url', 'history',
|
||
|
|
'encoding', 'reason', 'cookies', 'elapsed', 'request'
|
||
|
|
]
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
self._content = False
|
||
|
|
self._content_consumed = False
|
||
|
|
self._next = None
|
||
|
|
|
||
|
|
#: Integer Code of responded HTTP Status, e.g. 404 or 200.
|
||
|
|
self.status_code = None
|
||
|
|
|
||
|
|
#: Case-insensitive Dictionary of Response Headers.
|
||
|
|
#: For example, ``headers['content-encoding']`` will return the
|
||
|
|
#: value of a ``'Content-Encoding'`` response header.
|
||
|
|
self.headers = CaseInsensitiveDict()
|
||
|
|
|
||
|
|
#: File-like object representation of response (for advanced usage).
|
||
|
|
#: Use of ``raw`` requires that ``stream=True`` be set on the request.
|
||
|
|
#: This requirement does not apply for use internally to Requests.
|
||
|
|
self.raw = None
|
||
|
|
|
||
|
|
#: Final URL location of Response.
|
||
|
|
self.url = None
|
||
|
|
|
||
|
|
#: Encoding to decode with when accessing r.text.
|
||
|
|
self.encoding = None
|
||
|
|
|
||
|
|
#: A list of :class:`Response <Response>` objects from
|
||
|
|
#: the history of the Request. Any redirect responses will end
|
||
|
|
#: up here. The list is sorted from the oldest to the most recent request.
|
||
|
|
self.history = []
|
||
|
|
|
||
|
|
#: Textual reason of responded HTTP Status, e.g. "Not Found" or "OK".
|
||
|
|
self.reason = None
|
||
|
|
|
||
|
|
#: A CookieJar of Cookies the server sent back.
|
||
|
|
self.cookies = cookiejar_from_dict({})
|
||
|
|
|
||
|
|
#: The amount of time elapsed between sending the request
|
||
|
|
#: and the arrival of the response (as a timedelta).
|
||
|
|
#: This property specifically measures the time taken between sending
|
||
|
|
#: the first byte of the request and finishing parsing the headers. It
|
||
|
|
#: is therefore unaffected by consuming the response content or the
|
||
|
|
#: value of the ``stream`` keyword argument.
|
||
|
|
self.elapsed = datetime.timedelta(0)
|
||
|
|
|
||
|
|
#: The :class:`PreparedRequest <PreparedRequest>` object to which this
|
||
|
|
#: is a response.
|
||
|
|
self.request = None
|
||
|
|
|
||
|
|
def __enter__(self):
|
||
|
|
return self
|
||
|
|
|
||
|
|
def __exit__(self, *args):
|
||
|
|
self.close()
|
||
|
|
|
||
|
|
def __getstate__(self):
|
||
|
|
# Consume everything; accessing the content attribute makes
|
||
|
|
# sure the content has been fully read.
|
||
|
|
if not self._content_consumed:
|
||
|
|
self.content
|
||
|
|
|
||
|
|
return {attr: getattr(self, attr, None) for attr in self.__attrs__}
|
||
|
|
|
||
|
|
def __setstate__(self, state):
|
||
|
|
for name, value in state.items():
|
||
|
|
setattr(self, name, value)
|
||
|
|
|
||
|
|
# pickled objects do not have .raw
|
||
|
|
setattr(self, '_content_consumed', True)
|
||
|
|
setattr(self, 'raw', None)
|
||
|
|
|
||
|
|
def __repr__(self):
|
||
|
|
return '<Response [%s]>' % (self.status_code)
|
||
|
|
|
||
|
|
def __bool__(self):
|
||
|
|
"""Returns True if :attr:`status_code` is less than 400.
|
||
|
|
|
||
|
|
This attribute checks if the status code of the response is between
|
||
|
|
400 and 600 to see if there was a client error or a server error. If
|
||
|
|
the status code, is between 200 and 400, this will return True. This
|
||
|
|
is **not** a check to see if the response code is ``200 OK``.
|
||
|
|
"""
|
||
|
|
return self.ok
|
||
|
|
|
||
|
|
def __nonzero__(self):
|
||
|
|
"""Returns True if :attr:`status_code` is less than 400.
|
||
|
|
|
||
|
|
This attribute checks if the status code of the response is between
|
||
|
|
400 and 600 to see if there was a client error or a server error. If
|
||
|
|
the status code, is between 200 and 400, this will return True. This
|
||
|
|
is **not** a check to see if the response code is ``200 OK``.
|
||
|
|
"""
|
||
|
|
return self.ok
|
||
|
|
|
||
|
|
def __iter__(self):
|
||
|
|
"""Allows you to use a response as an iterator."""
|
||
|
|
return self.iter_content(128)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def ok(self):
|
||
|
|
"""Returns True if :attr:`status_code` is less than 400, False if not.
|
||
|
|
|
||
|
|
This attribute checks if the status code of the response is between
|
||
|
|
400 and 600 to see if there was a client error or a server error. If
|
||
|
|
the status code is between 200 and 400, this will return True. This
|
||
|
|
is **not** a check to see if the response code is ``200 OK``.
|
||
|
|
"""
|
||
|
|
try:
|
||
|
|
self.raise_for_status()
|
||
|
|
except HTTPError:
|
||
|
|
return False
|
||
|
|
return True
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_redirect(self):
|
||
|
|
"""True if this Response is a well-formed HTTP redirect that could have
|
||
|
|
been processed automatically (by :meth:`Session.resolve_redirects`).
|
||
|
|
"""
|
||
|
|
return ('location' in self.headers and self.status_code in REDIRECT_STATI)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def is_permanent_redirect(self):
|
||
|
|
"""True if this Response one of the permanent versions of redirect."""
|
||
|
|
return ('location' in self.headers and self.status_code in (codes.moved_permanently, codes.permanent_redirect))
|
||
|
|
|
||
|
|
@property
|
||
|
|
def next(self):
|
||
|
|
"""Returns a PreparedRequest for the next request in a redirect chain, if there is one."""
|
||
|
|
return self._next
|
||
|
|
|
||
|
|
@property
|
||
|
|
def apparent_encoding(self):
|
||
|
|
"""The apparent encoding, provided by the chardet library."""
|
||
|
|
return chardet.detect(self.content)['encoding']
|
||
|
|
|
||
|
|
def iter_content(self, chunk_size=1, decode_unicode=False):
|
||
|
|
"""Iterates over the response data. When stream=True is set on the
|
||
|
|
request, this avoids reading the content at once into memory for
|
||
|
|
large responses. The chunk size is the number of bytes it should
|
||
|
|
read into memory. This is not necessarily the length of each item
|
||
|
|
returned as decoding can take place.
|
||
|
|
|
||
|
|
chunk_size must be of type int or None. A value of None will
|
||
|
|
function differently depending on the value of `stream`.
|
||
|
|
stream=True will read data as it arrives in whatever size the
|
||
|
|
chunks are received. If stream=False, data is returned as
|
||
|
|
a single chunk.
|
||
|
|
|
||
|
|
If decode_unicode is True, content will be decoded using the best
|
||
|
|
available encoding based on the response.
|
||
|
|
"""
|
||
|
|
|
||
|
|
def generate():
|
||
|
|
# Special case for urllib3.
|
||
|
|
if hasattr(self.raw, 'stream'):
|
||
|
|
try:
|
||
|
|
for chunk in self.raw.stream(chunk_size, decode_content=True):
|
||
|
|
yield chunk
|
||
|
|
except ProtocolError as e:
|
||
|
|
raise ChunkedEncodingError(e)
|
||
|
|
except DecodeError as e:
|
||
|
|
raise ContentDecodingError(e)
|
||
|
|
except ReadTimeoutError as e:
|
||
|
|
raise ConnectionError(e)
|
||
|
|
else:
|
||
|
|
# Standard file-like object.
|
||
|
|
while True:
|
||
|
|
chunk = self.raw.read(chunk_size)
|
||
|
|
if not chunk:
|
||
|
|
break
|
||
|
|
yield chunk
|
||
|
|
|
||
|
|
self._content_consumed = True
|
||
|
|
|
||
|
|
if self._content_consumed and isinstance(self._content, bool):
|
||
|
|
raise StreamConsumedError()
|
||
|
|
elif chunk_size is not None and not isinstance(chunk_size, int):
|
||
|
|
raise TypeError("chunk_size must be an int, it is instead a %s." % type(chunk_size))
|
||
|
|
# simulate reading small chunks of the content
|
||
|
|
reused_chunks = iter_slices(self._content, chunk_size)
|
||
|
|
|
||
|
|
stream_chunks = generate()
|
||
|
|
|
||
|
|
chunks = reused_chunks if self._content_consumed else stream_chunks
|
||
|
|
|
||
|
|
if decode_unicode:
|
||
|
|
chunks = stream_decode_response_unicode(chunks, self)
|
||
|
|
|
||
|
|
return chunks
|
||
|
|
|
||
|
|
def iter_lines(self, chunk_size=ITER_CHUNK_SIZE, decode_unicode=False, delimiter=None):
|
||
|
|
"""Iterates over the response data, one line at a time. When
|
||
|
|
stream=True is set on the request, this avoids reading the
|
||
|
|
content at once into memory for large responses.
|
||
|
|
|
||
|
|
.. note:: This method is not reentrant safe.
|
||
|
|
"""
|
||
|
|
|
||
|
|
pending = None
|
||
|
|
|
||
|
|
for chunk in self.iter_content(chunk_size=chunk_size, decode_unicode=decode_unicode):
|
||
|
|
|
||
|
|
if pending is not None:
|
||
|
|
chunk = pending + chunk
|
||
|
|
|
||
|
|
if delimiter:
|
||
|
|
lines = chunk.split(delimiter)
|
||
|
|
else:
|
||
|
|
lines = chunk.splitlines()
|
||
|
|
|
||
|
|
if lines and lines[-1] and chunk and lines[-1][-1] == chunk[-1]:
|
||
|
|
pending = lines.pop()
|
||
|
|
else:
|
||
|
|
pending = None
|
||
|
|
|
||
|
|
for line in lines:
|
||
|
|
yield line
|
||
|
|
|
||
|
|
if pending is not None:
|
||
|
|
yield pending
|
||
|
|
|
||
|
|
@property
|
||
|
|
def content(self):
|
||
|
|
"""Content of the response, in bytes."""
|
||
|
|
|
||
|
|
if self._content is False:
|
||
|
|
# Read the contents.
|
||
|
|
if self._content_consumed:
|
||
|
|
raise RuntimeError(
|
||
|
|
'The content for this response was already consumed')
|
||
|
|
|
||
|
|
if self.status_code == 0 or self.raw is None:
|
||
|
|
self._content = None
|
||
|
|
else:
|
||
|
|
self._content = b''.join(self.iter_content(CONTENT_CHUNK_SIZE)) or b''
|
||
|
|
|
||
|
|
self._content_consumed = True
|
||
|
|
# don't need to release the connection; that's been handled by urllib3
|
||
|
|
# since we exhausted the data.
|
||
|
|
return self._content
|
||
|
|
|
||
|
|
@property
|
||
|
|
def text(self):
|
||
|
|
"""Content of the response, in unicode.
|
||
|
|
|
||
|
|
If Response.encoding is None, encoding will be guessed using
|
||
|
|
``chardet``.
|
||
|
|
|
||
|
|
The encoding of the response content is determined based solely on HTTP
|
||
|
|
headers, following RFC 2616 to the letter. If you can take advantage of
|
||
|
|
non-HTTP knowledge to make a better guess at the encoding, you should
|
||
|
|
set ``r.encoding`` appropriately before accessing this property.
|
||
|
|
"""
|
||
|
|
|
||
|
|
# Try charset from content-type
|
||
|
|
content = None
|
||
|
|
encoding = self.encoding
|
||
|
|
|
||
|
|
if not self.content:
|
||
|
|
return str('')
|
||
|
|
|
||
|
|
# Fallback to auto-detected encoding.
|
||
|
|
if self.encoding is None:
|
||
|
|
encoding = self.apparent_encoding
|
||
|
|
|
||
|
|
# Decode unicode from given encoding.
|
||
|
|
try:
|
||
|
|
content = str(self.content, encoding, errors='replace')
|
||
|
|
except (LookupError, TypeError):
|
||
|
|
# A LookupError is raised if the encoding was not found which could
|
||
|
|
# indicate a misspelling or similar mistake.
|
||
|
|
#
|
||
|
|
# A TypeError can be raised if encoding is None
|
||
|
|
#
|
||
|
|
# So we try blindly encoding.
|
||
|
|
content = str(self.content, errors='replace')
|
||
|
|
|
||
|
|
return content
|
||
|
|
|
||
|
|
def json(self, **kwargs):
|
||
|
|
r"""Returns the json-encoded content of a response, if any.
|
||
|
|
|
||
|
|
:param \*\*kwargs: Optional arguments that ``json.loads`` takes.
|
||
|
|
:raises ValueError: If the response body does not contain valid json.
|
||
|
|
"""
|
||
|
|
|
||
|
|
if not self.encoding and self.content and len(self.content) > 3:
|
||
|
|
# No encoding set. JSON RFC 4627 section 3 states we should expect
|
||
|
|
# UTF-8, -16 or -32. Detect which one to use; If the detection or
|
||
|
|
# decoding fails, fall back to `self.text` (using chardet to make
|
||
|
|
# a best guess).
|
||
|
|
encoding = guess_json_utf(self.content)
|
||
|
|
if encoding is not None:
|
||
|
|
try:
|
||
|
|
return complexjson.loads(
|
||
|
|
self.content.decode(encoding), **kwargs
|
||
|
|
)
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
# Wrong UTF codec detected; usually because it's not UTF-8
|
||
|
|
# but some other 8-bit codec. This is an RFC violation,
|
||
|
|
# and the server didn't bother to tell us what codec *was*
|
||
|
|
# used.
|
||
|
|
pass
|
||
|
|
return complexjson.loads(self.text, **kwargs)
|
||
|
|
|
||
|
|
@property
|
||
|
|
def links(self):
|
||
|
|
"""Returns the parsed header links of the response, if any."""
|
||
|
|
|
||
|
|
header = self.headers.get('link')
|
||
|
|
|
||
|
|
# l = MultiDict()
|
||
|
|
l = {}
|
||
|
|
|
||
|
|
if header:
|
||
|
|
links = parse_header_links(header)
|
||
|
|
|
||
|
|
for link in links:
|
||
|
|
key = link.get('rel') or link.get('url')
|
||
|
|
l[key] = link
|
||
|
|
|
||
|
|
return l
|
||
|
|
|
||
|
|
def raise_for_status(self):
|
||
|
|
"""Raises :class:`HTTPError`, if one occurred."""
|
||
|
|
|
||
|
|
http_error_msg = ''
|
||
|
|
if isinstance(self.reason, bytes):
|
||
|
|
# We attempt to decode utf-8 first because some servers
|
||
|
|
# choose to localize their reason strings. If the string
|
||
|
|
# isn't utf-8, we fall back to iso-8859-1 for all other
|
||
|
|
# encodings. (See PR #3538)
|
||
|
|
try:
|
||
|
|
reason = self.reason.decode('utf-8')
|
||
|
|
except UnicodeDecodeError:
|
||
|
|
reason = self.reason.decode('iso-8859-1')
|
||
|
|
else:
|
||
|
|
reason = self.reason
|
||
|
|
|
||
|
|
if 400 <= self.status_code < 500:
|
||
|
|
http_error_msg = u'%s Client Error: %s for url: %s' % (self.status_code, reason, self.url)
|
||
|
|
|
||
|
|
elif 500 <= self.status_code < 600:
|
||
|
|
http_error_msg = u'%s Server Error: %s for url: %s' % (self.status_code, reason, self.url)
|
||
|
|
|
||
|
|
if http_error_msg:
|
||
|
|
raise HTTPError(http_error_msg, response=self)
|
||
|
|
|
||
|
|
def close(self):
|
||
|
|
"""Releases the connection back to the pool. Once this method has been
|
||
|
|
called the underlying ``raw`` object must not be accessed again.
|
||
|
|
|
||
|
|
*Note: Should not normally need to be called explicitly.*
|
||
|
|
"""
|
||
|
|
if not self._content_consumed:
|
||
|
|
self.raw.close()
|
||
|
|
|
||
|
|
release_conn = getattr(self.raw, 'release_conn', None)
|
||
|
|
if release_conn is not None:
|
||
|
|
release_conn()
|