Make http -f display the request headers. Closes #9912

[ineu]

Description

As described in #9912, the http command could display the request headers with the --full flag, which could help in debugging the requests. This PR adds such functionality.

User-Facing Changes

If http get or other http command which supports the --full flag is invoked with the flag, it used to display the headers key which contained an table of response headers. Now this key contains two nested keys: response and request, each of them being a table of the response and request headers accordingly.

[fdncred]

Nice! Thanks for adding this.

What about req_headers and res_headers?

Also, is it possible to add some tests to ensure we don't break this functionality in the future?

[ineu]

What about req_headers and res_headers?

As a developer I'd prefer uniform names, but as a user I feel like simple headers is still better. I expect the request_headers to be used rather rarely, so a long name is fine for this key.

Also, is it possible to add some tests to ensure we don't break this functionality in the future?

I wanted to add tests, but couldn't find existing tests for the http module as an example. The problem is that this feature make sense at the very end of the request/response process, so it sounds like a case for integration testing, and I'm absolutely no Rust expert to bring the complete web integration testing solution.

I'll try to craft some unit tests though.

[fdncred]

there are tests for each http command. i looked at them this morning.

maybe you could make headers a list and it contains request and response?

[ineu]

That could be an option, I'll check how it feels

[ineu]

Not bad, | get headers.request feels quite convenient.

[ineu]

The test is added

[ineu]

Updated the PR description and screenshot according to the current format

[fdncred]

Looks great!

[fdncred]

Thanks for putting this together. I tested a few things and it seems to work great!