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541 lines
18 KiB
Python
541 lines
18 KiB
Python
# -*- coding: utf-8 -*-
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"""
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requests.cookies
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~~~~~~~~~~~~~~~~
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Compatibility code to be able to use `cookielib.CookieJar` with requests.
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requests.utils imports from here, so be careful with imports.
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"""
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import copy
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import time
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import calendar
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import collections
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from .compat import cookielib, urlparse, urlunparse, Morsel
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try:
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import threading
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# grr, pyflakes: this fixes "redefinition of unused 'threading'"
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threading
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except ImportError:
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import dummy_threading as threading
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class MockRequest(object):
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"""Wraps a `requests.Request` to mimic a `urllib2.Request`.
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The code in `cookielib.CookieJar` expects this interface in order to correctly
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manage cookie policies, i.e., determine whether a cookie can be set, given the
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domains of the request and the cookie.
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The original request object is read-only. The client is responsible for collecting
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the new headers via `get_new_headers()` and interpreting them appropriately. You
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probably want `get_cookie_header`, defined below.
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"""
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def __init__(self, request):
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self._r = request
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self._new_headers = {}
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self.type = urlparse(self._r.url).scheme
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def get_type(self):
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return self.type
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def get_host(self):
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return urlparse(self._r.url).netloc
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def get_origin_req_host(self):
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return self.get_host()
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def get_full_url(self):
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# Only return the response's URL if the user hadn't set the Host
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# header
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if not self._r.headers.get('Host'):
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return self._r.url
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# If they did set it, retrieve it and reconstruct the expected domain
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host = self._r.headers['Host']
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parsed = urlparse(self._r.url)
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# Reconstruct the URL as we expect it
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return urlunparse([
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parsed.scheme, host, parsed.path, parsed.params, parsed.query,
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parsed.fragment
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])
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def is_unverifiable(self):
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return True
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def has_header(self, name):
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return name in self._r.headers or name in self._new_headers
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def get_header(self, name, default=None):
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return self._r.headers.get(name, self._new_headers.get(name, default))
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def add_header(self, key, val):
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"""cookielib has no legitimate use for this method; add it back if you find one."""
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raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")
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def add_unredirected_header(self, name, value):
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self._new_headers[name] = value
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def get_new_headers(self):
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return self._new_headers
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@property
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def unverifiable(self):
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return self.is_unverifiable()
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@property
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def origin_req_host(self):
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return self.get_origin_req_host()
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@property
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def host(self):
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return self.get_host()
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class MockResponse(object):
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"""Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.
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...what? Basically, expose the parsed HTTP headers from the server response
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the way `cookielib` expects to see them.
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"""
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def __init__(self, headers):
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"""Make a MockResponse for `cookielib` to read.
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:param headers: a httplib.HTTPMessage or analogous carrying the headers
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"""
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self._headers = headers
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def info(self):
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return self._headers
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def getheaders(self, name):
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self._headers.getheaders(name)
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def extract_cookies_to_jar(jar, request, response):
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"""Extract the cookies from the response into a CookieJar.
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:param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
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:param request: our own requests.Request object
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:param response: urllib3.HTTPResponse object
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"""
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if not (hasattr(response, '_original_response') and
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response._original_response):
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return
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# the _original_response field is the wrapped httplib.HTTPResponse object,
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req = MockRequest(request)
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# pull out the HTTPMessage with the headers and put it in the mock:
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res = MockResponse(response._original_response.msg)
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jar.extract_cookies(res, req)
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def get_cookie_header(jar, request):
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"""
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Produce an appropriate Cookie header string to be sent with `request`, or None.
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:rtype: str
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"""
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r = MockRequest(request)
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jar.add_cookie_header(r)
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return r.get_new_headers().get('Cookie')
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def remove_cookie_by_name(cookiejar, name, domain=None, path=None):
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"""Unsets a cookie by name, by default over all domains and paths.
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Wraps CookieJar.clear(), is O(n).
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"""
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clearables = []
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for cookie in cookiejar:
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if cookie.name != name:
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continue
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if domain is not None and domain != cookie.domain:
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continue
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if path is not None and path != cookie.path:
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continue
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clearables.append((cookie.domain, cookie.path, cookie.name))
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for domain, path, name in clearables:
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cookiejar.clear(domain, path, name)
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class CookieConflictError(RuntimeError):
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"""There are two cookies that meet the criteria specified in the cookie jar.
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Use .get and .set and include domain and path args in order to be more specific.
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"""
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class RequestsCookieJar(cookielib.CookieJar, collections.MutableMapping):
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"""Compatibility class; is a cookielib.CookieJar, but exposes a dict
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interface.
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This is the CookieJar we create by default for requests and sessions that
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don't specify one, since some clients may expect response.cookies and
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session.cookies to support dict operations.
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Requests does not use the dict interface internally; it's just for
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compatibility with external client code. All requests code should work
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out of the box with externally provided instances of ``CookieJar``, e.g.
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``LWPCookieJar`` and ``FileCookieJar``.
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Unlike a regular CookieJar, this class is pickleable.
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.. warning:: dictionary operations that are normally O(1) may be O(n).
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"""
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def get(self, name, default=None, domain=None, path=None):
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"""Dict-like get() that also supports optional domain and path args in
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order to resolve naming collisions from using one cookie jar over
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multiple domains.
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.. warning:: operation is O(n), not O(1).
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"""
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try:
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return self._find_no_duplicates(name, domain, path)
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except KeyError:
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return default
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def set(self, name, value, **kwargs):
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"""Dict-like set() that also supports optional domain and path args in
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order to resolve naming collisions from using one cookie jar over
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multiple domains.
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"""
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# support client code that unsets cookies by assignment of a None value:
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if value is None:
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remove_cookie_by_name(self, name, domain=kwargs.get('domain'), path=kwargs.get('path'))
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return
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if isinstance(value, Morsel):
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c = morsel_to_cookie(value)
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else:
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c = create_cookie(name, value, **kwargs)
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self.set_cookie(c)
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return c
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def iterkeys(self):
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"""Dict-like iterkeys() that returns an iterator of names of cookies
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from the jar.
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.. seealso:: itervalues() and iteritems().
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"""
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for cookie in iter(self):
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yield cookie.name
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def keys(self):
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"""Dict-like keys() that returns a list of names of cookies from the
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jar.
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.. seealso:: values() and items().
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"""
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return list(self.iterkeys())
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def itervalues(self):
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"""Dict-like itervalues() that returns an iterator of values of cookies
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from the jar.
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.. seealso:: iterkeys() and iteritems().
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"""
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for cookie in iter(self):
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yield cookie.value
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def values(self):
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"""Dict-like values() that returns a list of values of cookies from the
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jar.
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.. seealso:: keys() and items().
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"""
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return list(self.itervalues())
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def iteritems(self):
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"""Dict-like iteritems() that returns an iterator of name-value tuples
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from the jar.
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.. seealso:: iterkeys() and itervalues().
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"""
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for cookie in iter(self):
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yield cookie.name, cookie.value
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def items(self):
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"""Dict-like items() that returns a list of name-value tuples from the
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jar. Allows client-code to call ``dict(RequestsCookieJar)`` and get a
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vanilla python dict of key value pairs.
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.. seealso:: keys() and values().
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"""
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return list(self.iteritems())
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def list_domains(self):
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"""Utility method to list all the domains in the jar."""
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domains = []
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for cookie in iter(self):
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if cookie.domain not in domains:
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domains.append(cookie.domain)
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return domains
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def list_paths(self):
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"""Utility method to list all the paths in the jar."""
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paths = []
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for cookie in iter(self):
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if cookie.path not in paths:
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paths.append(cookie.path)
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return paths
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def multiple_domains(self):
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"""Returns True if there are multiple domains in the jar.
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Returns False otherwise.
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:rtype: bool
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"""
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domains = []
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for cookie in iter(self):
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if cookie.domain is not None and cookie.domain in domains:
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return True
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domains.append(cookie.domain)
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return False # there is only one domain in jar
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def get_dict(self, domain=None, path=None):
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"""Takes as an argument an optional domain and path and returns a plain
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old Python dict of name-value pairs of cookies that meet the
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requirements.
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:rtype: dict
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"""
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dictionary = {}
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for cookie in iter(self):
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if (domain is None or cookie.domain == domain) and (path is None
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or cookie.path == path):
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dictionary[cookie.name] = cookie.value
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return dictionary
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def __contains__(self, name):
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try:
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return super(RequestsCookieJar, self).__contains__(name)
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except CookieConflictError:
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return True
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def __getitem__(self, name):
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"""Dict-like __getitem__() for compatibility with client code. Throws
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exception if there are more than one cookie with name. In that case,
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use the more explicit get() method instead.
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.. warning:: operation is O(n), not O(1).
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"""
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return self._find_no_duplicates(name)
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def __setitem__(self, name, value):
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"""Dict-like __setitem__ for compatibility with client code. Throws
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exception if there is already a cookie of that name in the jar. In that
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case, use the more explicit set() method instead.
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"""
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self.set(name, value)
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def __delitem__(self, name):
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"""Deletes a cookie given a name. Wraps ``cookielib.CookieJar``'s
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``remove_cookie_by_name()``.
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"""
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remove_cookie_by_name(self, name)
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def set_cookie(self, cookie, *args, **kwargs):
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if hasattr(cookie.value, 'startswith') and cookie.value.startswith('"') and cookie.value.endswith('"'):
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cookie.value = cookie.value.replace('\\"', '')
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return super(RequestsCookieJar, self).set_cookie(cookie, *args, **kwargs)
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def update(self, other):
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"""Updates this jar with cookies from another CookieJar or dict-like"""
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if isinstance(other, cookielib.CookieJar):
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for cookie in other:
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self.set_cookie(copy.copy(cookie))
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else:
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super(RequestsCookieJar, self).update(other)
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def _find(self, name, domain=None, path=None):
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"""Requests uses this method internally to get cookie values.
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If there are conflicting cookies, _find arbitrarily chooses one.
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See _find_no_duplicates if you want an exception thrown if there are
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conflicting cookies.
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:param name: a string containing name of cookie
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:param domain: (optional) string containing domain of cookie
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:param path: (optional) string containing path of cookie
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:return: cookie.value
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"""
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for cookie in iter(self):
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if cookie.name == name:
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if domain is None or cookie.domain == domain:
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if path is None or cookie.path == path:
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return cookie.value
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raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
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def _find_no_duplicates(self, name, domain=None, path=None):
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"""Both ``__get_item__`` and ``get`` call this function: it's never
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used elsewhere in Requests.
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:param name: a string containing name of cookie
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:param domain: (optional) string containing domain of cookie
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:param path: (optional) string containing path of cookie
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:raises KeyError: if cookie is not found
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:raises CookieConflictError: if there are multiple cookies
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that match name and optionally domain and path
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:return: cookie.value
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"""
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toReturn = None
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for cookie in iter(self):
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if cookie.name == name:
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if domain is None or cookie.domain == domain:
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if path is None or cookie.path == path:
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if toReturn is not None: # if there are multiple cookies that meet passed in criteria
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raise CookieConflictError('There are multiple cookies with name, %r' % (name))
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toReturn = cookie.value # we will eventually return this as long as no cookie conflict
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if toReturn:
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return toReturn
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raise KeyError('name=%r, domain=%r, path=%r' % (name, domain, path))
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def __getstate__(self):
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"""Unlike a normal CookieJar, this class is pickleable."""
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state = self.__dict__.copy()
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# remove the unpickleable RLock object
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state.pop('_cookies_lock')
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return state
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def __setstate__(self, state):
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"""Unlike a normal CookieJar, this class is pickleable."""
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self.__dict__.update(state)
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if '_cookies_lock' not in self.__dict__:
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self._cookies_lock = threading.RLock()
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def copy(self):
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"""Return a copy of this RequestsCookieJar."""
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new_cj = RequestsCookieJar()
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new_cj.update(self)
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return new_cj
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def _copy_cookie_jar(jar):
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if jar is None:
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return None
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if hasattr(jar, 'copy'):
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# We're dealing with an instance of RequestsCookieJar
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return jar.copy()
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# We're dealing with a generic CookieJar instance
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new_jar = copy.copy(jar)
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new_jar.clear()
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for cookie in jar:
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new_jar.set_cookie(copy.copy(cookie))
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return new_jar
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def create_cookie(name, value, **kwargs):
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"""Make a cookie from underspecified parameters.
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By default, the pair of `name` and `value` will be set for the domain ''
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and sent on every request (this is sometimes called a "supercookie").
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"""
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result = dict(
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version=0,
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name=name,
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value=value,
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port=None,
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domain='',
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path='/',
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secure=False,
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expires=None,
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discard=True,
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comment=None,
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comment_url=None,
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rest={'HttpOnly': None},
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rfc2109=False,)
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badargs = set(kwargs) - set(result)
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if badargs:
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err = 'create_cookie() got unexpected keyword arguments: %s'
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raise TypeError(err % list(badargs))
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result.update(kwargs)
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result['port_specified'] = bool(result['port'])
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result['domain_specified'] = bool(result['domain'])
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result['domain_initial_dot'] = result['domain'].startswith('.')
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result['path_specified'] = bool(result['path'])
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return cookielib.Cookie(**result)
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def morsel_to_cookie(morsel):
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"""Convert a Morsel object into a Cookie containing the one k/v pair."""
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expires = None
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if morsel['max-age']:
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try:
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expires = int(time.time() + int(morsel['max-age']))
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except ValueError:
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raise TypeError('max-age: %s must be integer' % morsel['max-age'])
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elif morsel['expires']:
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time_template = '%a, %d-%b-%Y %H:%M:%S GMT'
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expires = calendar.timegm(
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time.strptime(morsel['expires'], time_template)
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)
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return create_cookie(
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comment=morsel['comment'],
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comment_url=bool(morsel['comment']),
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discard=False,
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domain=morsel['domain'],
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expires=expires,
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name=morsel.key,
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path=morsel['path'],
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port=None,
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rest={'HttpOnly': morsel['httponly']},
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rfc2109=False,
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secure=bool(morsel['secure']),
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value=morsel.value,
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version=morsel['version'] or 0,
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)
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def cookiejar_from_dict(cookie_dict, cookiejar=None, overwrite=True):
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"""Returns a CookieJar from a key/value dictionary.
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:param cookie_dict: Dict of key/values to insert into CookieJar.
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:param cookiejar: (optional) A cookiejar to add the cookies to.
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:param overwrite: (optional) If False, will not replace cookies
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already in the jar with new ones.
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"""
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if cookiejar is None:
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cookiejar = RequestsCookieJar()
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if cookie_dict is not None:
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names_from_jar = [cookie.name for cookie in cookiejar]
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for name in cookie_dict:
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if overwrite or (name not in names_from_jar):
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cookiejar.set_cookie(create_cookie(name, cookie_dict[name]))
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return cookiejar
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def merge_cookies(cookiejar, cookies):
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"""Add cookies to cookiejar and returns a merged CookieJar.
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|
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:param cookiejar: CookieJar object to add the cookies to.
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:param cookies: Dictionary or CookieJar object to be added.
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"""
|
|
if not isinstance(cookiejar, cookielib.CookieJar):
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raise ValueError('You can only merge into CookieJar')
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|
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if isinstance(cookies, dict):
|
|
cookiejar = cookiejar_from_dict(
|
|
cookies, cookiejar=cookiejar, overwrite=False)
|
|
elif isinstance(cookies, cookielib.CookieJar):
|
|
try:
|
|
cookiejar.update(cookies)
|
|
except AttributeError:
|
|
for cookie_in_jar in cookies:
|
|
cookiejar.set_cookie(cookie_in_jar)
|
|
|
|
return cookiejar
|