(thx flynn)
fix decoding chunked from backend
truncate response and error out if backend sends excess data
after chunked encoding
x-ref:
"Too much content with HTTP/2.0"
https://redmine.lighttpd.net/issues/3049
relay 1xx from backend over HTTP/2, e.g. 103 Early Hints
(if client is connected using HTTP/2)
enabled by default unless disabled in lighttpd.conf with:
server.feature-flags += ( "server.h2-discard-backend-1xx" = "enable" )
Warning: backends which send 103 Early Hints should check User-Agent
before doing so since naive clients might not handle unexpected 1xx.
Some clients may take the 1xx response as the final response, expecting
only one response. Some clients might not properly handle 100 Continue
if the client did not send Expect: 100-continue with the request.
https://tools.ietf.org/html/rfc8297#section-3 Security Considerations
x-ref:
An HTTP Status Code for Indicating Hints (103 Early Hints)
https://tools.ietf.org/html/rfc8297
allow h2.c layer to modify r->state in addition to r->h2state
Do not retire/release r on error if trailers (as opposed to headers)
(stream r was just allocated in the same scope for headers,
so ok to release)
http_request_parse_header() specialized for HTTP/2 request headers
to be parsed as each field-name and value is HPACK-decoded; send headers
directly from HPACK decoder, rather than double-buffering in chunkqueue
http_request_headers_process_h2() for post-processing
(subsequently incrementally updated using git rebase)
huge props and many thank yous to writers of testing tools used while
developing HTTP/2 support in lighttpd:
h2spec - conformance testing tool for HTTP/2 implementation
https://github.com/summerwind/h2spec
h2load - HTTP/2 benchmarking tool
https://nghttp2.org/documentation/h2load-howto.html
curl - command line tool and library for transferring data with URLs
https://curl.haxx.se/