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Add nghttp2_session_request_allowed() API function

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This function is useful for the client application to know that there
is a chance that request can be sent.  If this function returns 0,
there is zero chance to make a request.

This commit also set error_code passed to
nghttp2_on_stream_close_callback to NGHTTP2_REFUSED_STREAM if request
is not sent.
This commit is contained in:
Tatsuhiro Tsujikawa
2015-10-29 22:49:27 +09:00
parent ad395f0603
commit 1c37abc0dd
4 changed files with 32 additions and 0 deletions
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10
lib/nghttp2_session.c
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@@ -1322,6 +1322,12 @@ static int session_predicate_for_stream_send(nghttp2_session *session,
return 0;
}
int nghttp2_session_request_allowed(nghttp2_session *session) {
return !session->server && session->next_stream_id <= INT32_MAX &&
(session->goaway_flags &
(NGHTTP2_GOAWAY_TERM_ON_SEND | NGHTTP2_GOAWAY_RECV)) == 0;
}
/*
* This function checks request HEADERS frame, which opens stream, can
* be sent at this time.
@@ -2685,6 +2691,10 @@ static ssize_t nghttp2_session_mem_send_internal(nghttp2_session *session,
opened_stream_id = item->frame.hd.stream_id;
if (item->aux_data.headers.canceled) {
error_code = item->aux_data.headers.error_code;
} else {
/* Set error_code to REFUSED_STREAM so that application
can send request again. */
error_code = NGHTTP2_REFUSED_STREAM;
}
}
break;