haproxy/include
Christopher Faulet 077906da14 MAJOR: mux-h1: Drain requests on client side before shut a stream down
unlike for H2 and H3, there is no mechanism in H1 to notify the client it
must stop to upload data when a response is replied before the end of the
request without closing the connection. There is no RST_STREAM frame
equivalent.

Thus, there is only two ways to deal with this situation: closing the
connection or draining the request. Until now, HAProxy didn't support
draining H1 messages. Closing the connection in this case has however a
major drawback. It leads to send a TCP reset, dropping this way all in-fly
data. There is no warranty the client has fully received the response.

Draining H1 messages was never implemented because in old versions it was a
bit tricky to implement. However, it is now far simplier to support this
feature because it is possible to have a H1 stream without any applicative
stream. It is the purpose of this patch. Now, when a shutdown is requested
and the stream is detached from the connection, if the request is unfinished
while the response was fully sent, the request in drained.

To do so, in this case the shutdown and the detach are delayed. From the
upper layer point of view, there is no changes. The endpoint is shut down
and detached as usual. But on H1 mux point of view, the H1 stream is still
alive and is being able to drain data. However the stream-endpoint
descriptor is orphan. Once the request is fully received (and drained), the
connection is shut down if it cannot be reused for a new transaction and the
H1 stream is destroyed.
2024-02-28 16:02:33 +01:00
..
haproxy MAJOR: mux-h1: Drain requests on client side before shut a stream down 2024-02-28 16:02:33 +01:00
import BUG/MINOR: ist: only store NUL byte on succeeded alloc 2024-02-23 19:51:54 +01:00
make BUILD: makefile: also define cmd_CXX to pretty-print C++ build commands 2024-01-26 18:54:23 +01:00