When a PreparedRequests's cookie jar is not a RequestsCookieJar instance, it
will not have a "copy" method. By adding _copy_cookie_jar we can reliably copy
cookie jars so that we have an actual copy instead of the same instance on
different prepared requests.
This also updates the RequestsCookieJar.update logic to create copies of
cookies from the other jar.
Closes#2527
When other libraries or tools add items to the meta_path, we need to preempt
some of their import hooks to be sure modules can be properly found. This also
prevents problems importing built-in modules on Python 2 where it will first
attempt to import something like:
requests.packages.chardet.sys
By placing our VendorAlias first, the above will fail and then it will fall
back to trying to import sys directly instead.
Closes#2465
The existing code counts the number of 401 responses in the num_401_calls
authenticator attribute. This is in place so as to ensure the necessary auth
header is sent, while avoiding infinite 401 loops (issue #547).
This commit makes num_401_calls an instance of threading.local() (previously
an integer), using num_401_calls.value as the counter.
It ensures that concurrent authentication requests get each their own counter
and behave as expected (otherwise every other concurrent request would have
its authentication fail).
With the new import machinery in requests/packages/__init__.py people
using `python setup.py test` will not be able to run the tests the first
time on a new environment. The VendorAlias logic breaks the import
machinery and the tests fail. By removing the import of requests in
setup.py, we avoid the issue where sys.meta_path continues to have the
version of VendorAlias from the import in setup.py.
Closes#2462
Importing from urllib3's top-level location causes the namespace to be
urllib3.util.retry.Retry instead of
requests.packages.urllib3.util.retry.Retry. Without this fix, an using
requests with an un-vendored version of urllib3 will break when urllib3's
retry handling kicks in.
Closesshazow/urllib3#567
Cory Benfield
kennethreitz