Feature request: support "http(s) request" from raw requests file

[snowman]

From https://httpie.io/docs#offline-mode,

Generating raw requests that can be sent with any other client:

▶ RUN# 1. save a raw request to a file: $ http --offline POST httpbin.org/post hello=world > request.http ▶ RUN# 2. send it over the wire with, for example, the fantastic netcat tool: $ nc httpbin.org 80 < request.http

Expected

one can run http < request.http or https < request.https to reproduce some results.

[PerfectlyInternal]

So something along the line of batch requests from a file? I see what you're thinking here, and it would be nice to have an automated way to make a lot of requests efficiently. I suppose this would also require a directory as an argument to have somewhere to store all the output because printing to stdout would probably be a bad idea with batch requests.

[danslapman]

Actually duplicates #758

[Sick-codes]

i would be willing to work on this if no is already working on it

[matthewadams]

Bonus for ability to add assertion capabilities so that entire test suites could be defined in .http files.