adding proxy auth to pypub

[imakelists]

Adding proxy authentcation to pypub

[imgurbot12]

Hey @imakelists, thanks for your interest in the project.

Unfortunately switching from urllib.request to requests is not a simple switch, and using urllib.request was very intentional since it supports additional schemes like file:// which may sometimes be required whilst requests does not support this out of the box.

Additionally, urllib already supports http-proxies according to the existing documentation: https://docs.python.org/3.8/howto/urllib2.html#proxies

In fact, you can pass proxy settings via env-variable using HTTP_PROXY with the included authentication and it should be automatically parsed and included in the associated requests without any modification to the existing code.

If you'd still like to do it programatically I'd ask you to use urllib's ProxyHandler if possible please. Lmk if you have any questions or concerns. Thanks :)