tree bd2ae8b8fef85ee3b06d93dd60f0a06a6e68bb3c
parent 09a52bf915e5095717ba34043157ce073b100bcc
author QUICHE team <quiche-dev@google.com> 1635956167 -0700
committer Copybara-Service <copybara-worker@google.com> 1635956267 -0700

Wrap OgHttp2Session callbacks with a latched_error_ check.

This CL introduces a new class EventForwarder that exists mostly to forward
SpdyFramerVisitorInterface events to its OgHttp2Session receiver. However, if
OgHttp2Session has encountered a connection-level error and called
LatchErrorAndNotify(), then the EventForwarder drops the event instead of
forwarding to OgHttp2Session. This functionality is analogous to
Http2Dispatcher::SpdyFramerAdaptor:
http://google3/gfe/gfe2/http2/http2_dispatcher.h;l=975;rcl=406920946.

The immediate use case is to prevent calls to OnStreamEnd() after header
validation indicates a connection-level error, where OnStreamEnd() would result
in further (unwanted) processing on the connection. Another future potential
use case could be to prevent subsequent OnSetting() calls after one OnSetting()
call results in a connection-level error (e.g., future SETTINGS validation).

PiperOrigin-RevId: 407352242