apr_status_t h2_session_write(h2_session *session, apr_interval_time_t timeout)
{
apr_status_t status = APR_EAGAIN;
h2_response *response = NULL;
int have_written = 0;
assert(session);
/* Check that any pending window updates are sent. */
status = h2_session_update_windows(session);
if (status == APR_SUCCESS) {
have_written = 1;
}
else if (status != APR_EAGAIN) {
return status;
}
/* If we have responses ready, submit them now. */
while ((response = h2_session_pop_response(session)) != NULL) {
h2_stream *stream = h2_session_get_stream(session, response->stream_id);
if (stream) {
status = h2_session_handle_response(session, stream, response);
have_written = 1;
}
h2_response_destroy(response);
response = NULL;
}
h2_session_resume_streams_with_data(session);
if (!have_written && timeout > 0 && !h2_session_want_write(session)) {
status = h2_mplx_out_trywait(session->mplx, timeout, session->iowait);
}
h2_session_resume_streams_with_data(session);
if (h2_session_want_write(session)) {
status = APR_SUCCESS;
int rv = nghttp2_session_send(session->ngh2);
if (rv != 0) {
ap_log_cerror( APLOG_MARK, APLOG_INFO, 0, session->c,
"h2_session: send: %s", nghttp2_strerror(rv));
if (nghttp2_is_fatal(rv)) {
h2_session_abort_int(session, rv);
status = APR_ECONNABORTED;
}
}
have_written = 1;
}
if (have_written) {
h2_conn_io_flush(&session->io);
}
reap_zombies(session);
return status;
}
apr_status_t h2_session_write(h2_session *session, apr_interval_time_t timeout)
{
apr_status_t status = APR_EAGAIN;
h2_stream *stream = NULL;
int flush_output = 0;
AP_DEBUG_ASSERT(session);
/* Check that any pending window updates are sent. */
status = h2_session_update_windows(session);
if (status == APR_SUCCESS) {
flush_output = 1;
}
else if (status != APR_EAGAIN) {
return status;
}
if (h2_session_want_write(session)) {
int rv;
status = APR_SUCCESS;
rv = nghttp2_session_send(session->ngh2);
if (rv != 0) {
ap_log_cerror( APLOG_MARK, APLOG_DEBUG, 0, session->c,
"h2_session: send: %s", nghttp2_strerror(rv));
if (nghttp2_is_fatal(rv)) {
h2_session_abort_int(session, rv);
status = APR_ECONNABORTED;
}
}
flush_output = 1;
}
/* If we have responses ready, submit them now. */
while ((stream = h2_mplx_next_submit(session->mplx,
session->streams)) != NULL) {
status = h2_session_handle_response(session, stream);
flush_output = 1;
}
if (h2_session_resume_streams_with_data(session) > 0) {
flush_output = 1;
}
if (!flush_output && timeout > 0 && !h2_session_want_write(session)) {
status = h2_mplx_out_trywait(session->mplx, timeout, session->iowait);
if (status != APR_TIMEUP
&& h2_session_resume_streams_with_data(session) > 0) {
flush_output = 1;
}
else {
/* nothing happened to ongoing streams, do some house-keeping */
}
}
if (h2_session_want_write(session)) {
int rv;
status = APR_SUCCESS;
rv = nghttp2_session_send(session->ngh2);
if (rv != 0) {
ap_log_cerror( APLOG_MARK, APLOG_DEBUG, 0, session->c,
"h2_session: send2: %s", nghttp2_strerror(rv));
if (nghttp2_is_fatal(rv)) {
h2_session_abort_int(session, rv);
status = APR_ECONNABORTED;
}
}
flush_output = 1;
}
if (flush_output) {
h2_conn_io_flush(&session->io);
}
return status;
}