Adding HTTP/2 WebSockets support to the server.
See: https://github.com/apache/httpd/pull/362
Status:
Works for the test cases I came up with so far. Will do more testing in the
next weeks.
What are the main changes?
core:
- addition of
ap_get_conn_in_pollfd(
conn_rec *c,
apr_pollfd_t *pfd,
apr_interval_time_t *ptimeout);
implemented as a hook. core provides it socket and timeout on "main"
connections. mod_http2 provides its input pipe fd on "secondary" connections
that were made for it.
mod_http2:
- handling of CONNECT for WebSockets, check of correct headers
- announce WebSockets support in HTTP/2 settings sent to the client
- transform HTTP/2 WebSocket CONNECTs to internal GET requests with generated
"Sec-WebSocket-Key" headers, so that it appears internally as if it came via
HTTP/1.1.
- check for 101 response or fail the CONNECT. Check the 101 for a matching
"Sec-WebSocket-Accept" header or fail.
mod_proxy:
- make the proxy_tunnel code in proxy_util.c work in case it only has a
APR_POLL_FILE for the client side.
(Yann, please have a look and find my stupid mistakes!)
test
- added test cases in pytest for mod_http2 (needs python3-websockets installed)
The tests use a "ProxyPass xxx upgrade=websocket" configuration to a local
python websockets server that can perform a set of traffic cases.
- added test/clients directory to build "h2ws", the client used in the new tests
Cheers,
Stefan
