Fix bug with httpx usage - ensure basic auth is set when provided

[c0llab0rat0r]

• Fix a defect in the httpx proxy class implementation
• Add test proving it works - nginx is configured in front of IPFS and set to require Basic authentication.

requests session will pass authentication parameters on every request, but httpx does not. This could be a defect in httpx, based on a review of the httpx code.

Because Docker Hub has recently established request rate limits on pulls, pytest skip logic was added to prevent the test from executing when run with Travis. This could be changed if an open source special account was created with Docker Hub, and credentials from that account configured in Travis.

There's also logic to skip the test if run on Windows, because there isn't currently an IPFS docker image that supports Windows.

[c0llab0rat0r]

@ntninja this is ready to look at.

[ntninja]

This will take some time…

[c0llab0rat0r]

This will take some time…

Any feedback yet?

I'd like this to be in 0.8.0.

[c0llab0rat0r]

Discussed with @ntninja on chat.

Will look into using pytest-localserver as an alternative to docker-compose to avoid adding an additional dependency.