Handling half-closed HTTP/2 streams gracefully.

[tomchristie]

Pull request #641 added support for handling HTTP/1.1 half-closed connections gracefully.

In plainer language... when the client sends a large request, the server can close the request pre-emptively "nope this is too big not going to accept it" and still send a valid response. "nope that was too big, I didn't accept it". It's more user friendly if the client can return that response rather than just raising an exception at the point the request was closed.

We probably want to handle the same case for HTTP/2, but... it'd be really helpful to be able to demonstrate it in the wild. Can anyone point at an example 413 request against an HTTP/2 server that we could use to verify this as a requirement?

[karpetrosyan]

Code

import httpcore

pool = httpcore.ConnectionPool(http1=False, http2=True)
response = pool.request("GET", "http://127.0.0.1:80", content=b'1'*10_000_000)  # fails
response = pool.request("GET", "http://127.0.0.1:80", content=b'1'*10)  # ok

Nginx conf

http 
{
      server {
          listen 80 http2;
      }
  }
events {}