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"""
requests.cookies
~~~~~~~~~~~~~~~~

Compatibility code to be able to use `cookielib.CookieJar` with requests.

requests.utils imports from here, so be careful with imports.
"""

import copy
import time
import calendar

from ._internal_utils import to_native_string
from .compat import cookielib, urlparse, urlunparse, Morsel, MutableMapping

try:
    import threading
except ImportError:
    import dummy_threading as threading


class MockRequest(object):
    """Wraps a `requests.Request` to mimic a `urllib2.Request`.

    The code in `cookielib.CookieJar` expects this interface in order to correctly
    manage cookie policies, i.e., determine whether a cookie can be set, given the
    domains of the request and the cookie.

    The original request object is read-only. The client is responsible for collecting
    the new headers via `get_new_headers()` and interpreting them appropriately. You
    probably want `get_cookie_header`, defined below.
    """

    def __init__(self, request):
        self._r = request
        self._new_headers = {}
        self.type = urlparse(self._r.url).scheme

    def get_type(self):
        return self.type

    def get_host(self):
        return urlparse(self._r.url).netloc

    def get_origin_req_host(self):
        return self.get_host()

    def get_full_url(self):
        # Only return the response's URL if the user hadn't set the Host
        # header
        if not self._r.headers.get('Host'):
            return self._r.url
        # If they did set it, retrieve it and reconstruct the expected domain
        host = to_native_string(self._r.headers['Host'], encoding='utf-8')
        parsed = urlparse(self._r.url)
        # Reconstruct the URL as we expect it
        return urlunparse([
            parsed.scheme, host, parsed.path, parsed.params, parsed.query,
            parsed.fragment
        ])

    def is_unverifiable(self):
        return True

    def has_header(self, name):
        return name in self._r.headers or name in self._new_headers

    def get_header(self, name, default=None):
        return self._r.headers.get(name, self._new_headers.get(name, default))

    def add_header(self, key, val):
        """cookielib has no legitimate use for this method; add it back if you find one."""
        raise NotImplementedError("Cookie headers should be added with add_unredirected_header()")

    def add_unredirected_header(self, name, value):
        self._new_headers[name] = value

    def get_new_headers(self):
        return self._new_headers

    @property
    def unverifiable(self):
        return self.is_unverifiable()

    @property
    def origin_req_host(self):
        return self.get_origin_req_host()

    @property
    def host(self):
        return self.get_host()


class MockResponse(object):
    """Wraps a `httplib.HTTPMessage` to mimic a `urllib.addinfourl`.

    ...what? Basically, expose the parsed HTTP headers from the server response
    the way `cookielib` expects to see them.
    """

    def __init__(self, headers):
        """Make a MockResponse for `cookielib` to read.

        :param headers: a httplib.HTTPMessage or analogous carrying the headers
        """
        self._headers = headers

    def info(self):
        return self._headers

    def getheaders(self, name):
        self._headers.getheaders(name)


def extract_cookies_to_jar(jar, request, response):
    """Extract the cookies from the response into a CookieJar.

    :param jar: cookielib.CookieJar (not necessarily a RequestsCookieJar)
    :param request: our own requests.Request object
    :param response: urllib3.HTTPResponse object
    """
    if not (hasattr(response, '_original_response') and
            response._original_response):
        return
    # the _original_response field is the wrapped httplib.HTTPResponse object,
    req = MockRequest(request)
    # pull out the HTTPMessage with the headers and put it in the mock:
    res = MockResponse(response._original_response.msg)
    jar.extract_cookies(