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Return new stream ID from nghttp2_submit_{request, headers, push_promise}

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Previously stream ID was assigned just before HEADERS or PUSH_PROMISE
was serialized and nghttp2_submit_{request, headers, push_promise} did
not return stream ID.  The application has to check assigned stream ID
using before_frame_send_callback.  Now it is apparent that priority is
meant to DATA transfer only.  Also application can reorder the
requests if it wants. Therefore we can assign stream ID in
nghttp2_submit_* functions and return stream ID from them.  With this
change, now application does not have to check stream ID using
before_frame_send_callback and its code will be simplified.
This commit is contained in:
Tatsuhiro Tsujikawa
2014-05-07 23:24:07 +09:00
parent 51e79c5a3d
commit e8de437d5c
13 changed files with 293 additions and 415 deletions
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40
examples/client.c
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@@ -197,29 +197,6 @@ static ssize_t recv_callback(nghttp2_session *session,
return rv;
}
/*
* The implementation of nghttp2_before_frame_send_callback type. We
* use this function to get stream ID of the request. This is because
* stream ID is not known when we submit the request
* (nghttp2_submit_request).
*/
static int before_frame_send_callback(nghttp2_session *session,
const nghttp2_frame *frame,
void *user_data)
{
if(frame->hd.type == NGHTTP2_HEADERS &&
frame->headers.cat == NGHTTP2_HCAT_REQUEST) {
struct Request *req;
int32_t stream_id = frame->hd.stream_id;
req = nghttp2_session_get_stream_user_data(session, stream_id);
if(req && req->stream_id == -1) {
req->stream_id = stream_id;
printf("[INFO] Stream ID = %d\n", stream_id);
}
}
return 0;
}
static int on_frame_send_callback(nghttp2_session *session,
const nghttp2_frame *frame, void *user_data)
{
@@ -335,7 +312,6 @@ static void setup_nghttp2_callbacks(nghttp2_session_callbacks *callbacks)
memset(callbacks, 0, sizeof(nghttp2_session_callbacks));
callbacks->send_callback = send_callback;
callbacks->recv_callback = recv_callback;
callbacks->before_frame_send_callback = before_frame_send_callback;
callbacks->on_frame_send_callback = on_frame_send_callback;
callbacks->on_frame_recv_callback = on_frame_recv_callback;
callbacks->on_stream_close_callback = on_stream_close_callback;
@@ -470,7 +446,7 @@ static void ctl_poll(struct pollfd *pollfd, struct Connection *connection)
*/
static void submit_request(struct Connection *connection, struct Request *req)
{
int rv;
int32_t stream_id;
const nghttp2_nv nva[] = {
/* Make sure that the last item is NULL */
MAKE_NV(":method", "GET"),
@@ -480,11 +456,17 @@ static void submit_request(struct Connection *connection, struct Request *req)
MAKE_NV("accept", "*/*"),
MAKE_NV("user-agent", "nghttp2/"NGHTTP2_VERSION)
};
rv = nghttp2_submit_request(connection->session, NULL,
nva, sizeof(nva)/sizeof(nva[0]), NULL, req);
if(rv != 0) {
diec("nghttp2_submit_request", rv);
stream_id = nghttp2_submit_request(connection->session, NULL,
nva, sizeof(nva)/sizeof(nva[0]),
NULL, req);
if(stream_id < 0) {
diec("nghttp2_submit_request", stream_id);
}
req->stream_id = stream_id;
printf("[INFO] Stream ID = %d\n", stream_id);
}
/*