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Add nghttp2_session_consume() API

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Reworked no automatic WINDOW_UPDATE feature.  We added new API
nghttp2_session_consume() which tells the library how many bytes are
consumed by the application.  Instead of submitting WINDOW_UPDATE by
the application, the library is now responsible to submit
WINDOW_UPDATE based on consumed bytes.  This is more reliable method,
since it enables us to properly send WINDOW_UPDATE for stream and
connection individually.  The previous implementation of nghttpx had
broken connection window management.
This commit is contained in:
Tatsuhiro Tsujikawa
2014-07-25 21:26:03 +09:00
parent 9f17bee51d
commit 079db14d45
18 changed files with 395 additions and 276 deletions
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31
lib/nghttp2_submit.c
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@@ -348,27 +348,30 @@ int nghttp2_submit_window_update(nghttp2_session *session, uint8_t flags,
if(rv != 0) {
return rv;
}
/* recv_ign_window_size keeps track of ignored DATA bytes before
any connection-level WINDOW_UPDATE therefore, we can reset it
here. */
session->recv_ign_window_size = 0;
} else {
stream = nghttp2_session_get_stream(session, stream_id);
if(stream) {
rv = nghttp2_adjust_local_window_size(&stream->local_window_size,
&stream->recv_window_size,
&stream->recv_reduction,
&window_size_increment);
if(rv != 0) {
return rv;
}
} else {
if(!stream) {
return 0;
}
rv = nghttp2_adjust_local_window_size(&stream->local_window_size,
&stream->recv_window_size,
&stream->recv_reduction,
&window_size_increment);
if(rv != 0) {
return rv;
}
}
if(window_size_increment > 0) {
if(stream_id == 0) {
session->consumed_size =
nghttp2_max(0, session->consumed_size - window_size_increment);
} else {
stream->consumed_size =
nghttp2_max(0, stream->consumed_size - window_size_increment);
}
return nghttp2_session_add_window_update(session, flags, stream_id,
window_size_increment);
}