Add support for OAuth 2.0 authentication flows about xh HOT 4 OPEN

@jirutka Given that we don't support plugins yet, I think we could add auth types that people find useful. Do you know of any CLI tool that supports OAuth 2.0? I know there are a couple of OAuth HTTPie plugins, but they differ from your proposed implementation.

from xh.

I don’t know about any, that’s basically the reason why I’d like to add it into xh.

from xh.

In general we try to be compatible with HTTPie.

Similar issue for HTTPie (currently empty): httpie/cli#1427

For reference, this OAuth 1.0 plugin exists (and is listed in the official docs): https://github.com/qcif/httpie-oauth1

While it's ugly I think we'd want to go for the same approach of cramming everything inside the --auth option. That doesn't bloat the options and makes it much easier to persist in session files.

A popular OAuth 2.0 crate exists: https://lib.rs/crates/yup-oauth2

from xh.

While it's ugly I think we'd want to go for the same approach of cramming everything inside the --auth option.

It was just an example, I don’t insist on that choice of options at all. :)

A popular OAuth 2.0 crate exists: https://lib.rs/crates/yup-oauth2

This is not suitable, it provides just the ‘device’, ‘service account’ and ‘installed’ authorization flows, not client_credentials nor authorization_code.

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