nghttpx: Use same priority in frontend and backend HTTP2

src/shrpx_downstream.cc

@@ -525,11 +525,16 @@ evbuffer* Downstream::get_response_body_buf()
   return response_body_buf_;
 }
 
-void Downstream::set_priority(int pri)
+void Downstream::set_priority(int32_t pri)
 {
   priority_ = pri;
 }
 
+int32_t Downstream::get_priorty() const
+{
+  return priority_;
+}
+
 void Downstream::check_upgrade_fulfilled()
 {
   if(request_method_ == "CONNECT") {

src/shrpx_downstream.h

@@ -54,7 +54,8 @@ public:
   Upstream* get_upstream() const;
   void set_stream_id(int32_t stream_id);
   int32_t get_stream_id() const;
-  void set_priority(int pri);
+  void set_priority(int32_t pri);
+  int32_t get_priorty() const;
   void pause_read(IOCtrlReason reason);
   int resume_read(IOCtrlReason reason);
   void force_resume_read();
@@ -177,7 +178,7 @@ private:
   Upstream *upstream_;
   DownstreamConnection *dconn_;
   int32_t stream_id_;
-  int priority_;
+  int32_t priority_;
   // stream ID in backend connection
   int32_t downstream_stream_id_;
   // true if the request contains upgrade token (HTTP Upgrade or

src/shrpx_http2_downstream_connection.cc

@@ -392,9 +392,11 @@ int Http2DownstreamConnection::push_request_headers()
     nghttp2_data_provider data_prd;
     data_prd.source.ptr = this;
     data_prd.read_callback = http2_data_read_callback;
-    rv = http2session_->submit_request(this, 0, nv.data(), &data_prd);
+    rv = http2session_->submit_request(this, downstream_->get_priorty(),
+                                       nv.data(), &data_prd);
   } else {
-    rv = http2session_->submit_request(this, 0, nv.data(), nullptr);
+    rv = http2session_->submit_request(this, downstream_->get_priorty(),
+                                       nv.data(), nullptr);
   }
   if(rv != 0) {
     DCLOG(FATAL, this) << "nghttp2_submit_request() failed";

src/shrpx_https_upstream.cc

@@ -76,7 +76,7 @@ int htp_msg_begin(http_parser *htp)
     ULOG(INFO, upstream) << "HTTP request started";
   }
   upstream->reset_current_header_length();
-  auto downstream = new Downstream(upstream, 0, 0);
+  auto downstream = new Downstream(upstream, 0, NGHTTP2_PRI_DEFAULT);
   upstream->attach_downstream(downstream);
   return 0;
 }