如何验证连接是否与 python requests.session 一起重用？

Question

I'd like to use requests 's session to reuse connections in django.

Reusing connections in Django with Python Requests

says I only need to declare it in global and access it.
However I doubt it is working as expected because it didn't get any faster in my test.

Is there a way to see if connection is actually reused as described here?

http://docs.python-requests.org/en/latest/user/advanced/

Django spawns separate thread for each requests and I think it defeats the mechanism to share the connection. (because session won't be shared across multiple threads).. this is my hypothesis..

Answer 1

Maybe you already reuse connections

Any requests that you make within a session will automatically reuse the appropriate connection!

via http://docs.python-requests.org/en/latest/user/advanced/#keep-alive

But if you need to be sure you can put some debug prints inside urllib3 requests/packages/urllib3/poolmanager.py

Answer 2

You can try increasing your logging verbosity, then look out for logs that look like:

"Starting new HTTPS connection (1): some.url:port"

This is how to make global logging more verbose:

import logging
logging.basicConfig(level=logging.DEBUG, format="%(message)s")

If the connection is being reused, you will only see one of those messages for any given url. If it is not being reused, you will see a different one each time a connection is established to the same url.