prefix. Once mounted, any HTTP request made using that session whose URL starts
with the given prefix will use the given Transport Adapter.
-Implementing a Transport Adapter is beyond the scope of this documentation, but
-a good start would be to subclass the ``requests.adapters.BaseAdapter`` class.
+Many of the details of implementing a Transport Adapter are beyond the scope of
+this documentation, but take a look at the next example for a simple SSL use-
+case. For more than that, you might look at subclassing
+``requests.adapters.BaseAdapter``.
+
+Example: Specific SSL Version
+-----------------------------
+
+The Requests team has made a specific choice to use whatever SSL version is
+default in the underlying library (`urllib3`_). Normally this is fine, but from
+time to time, you might find yourself needing to connect to a service-endpoint
+that uses a version that isn't compatible with the default.
+
+You can use Transport Adapters for this by taking most of the existing
+implementation of HTTPAdapter, and adding a parameter *ssl_version* that gets
+passed-through to `urllib3`. We'll make a TA that instructs the library to use
+SSLv3:
+
+::
+
+ import ssl
+
+ from requests.adapters import HTTPAdapter
+ from requests.packages.urllib3.poolmanager import PoolManager
+
+
+ class Ssl3HttpAdapter(HTTPAdapter):
+ """"Transport adapter" that allows us to use SSLv3."""
+
+ def init_poolmanager(self, connections, maxsize, block=False):
+ self.poolmanager = PoolManager(num_pools=connections,
+ maxsize=maxsize,
+ block=block,
+ ssl_version=ssl.PROTOCOL_SSLv3)
.. _`described here`: http://kennethreitz.org/exposures/the-future-of-python-http
.. _`urllib3`: https://github.com/shazow/urllib3