nghttpx: Fix bug that chunked request stalls

src/shrpx_http_downstream_connection.cc

@@ -696,8 +696,9 @@ int HttpDownstreamConnection::process_blocked_request_buf() {
     }
   }
 
-  if (downstream_->get_blocked_request_data_eof()) {
-    return end_upload_data();
+  if (downstream_->get_blocked_request_data_eof() &&
+      downstream_->get_chunked_request()) {
+    end_upload_data_chunk();
   }
 
   return 0;
@@ -751,6 +752,12 @@ int HttpDownstreamConnection::end_upload_data() {
     return 0;
   }
 
+  end_upload_data_chunk();
+
+  return 0;
+}
+
+void HttpDownstreamConnection::end_upload_data_chunk() {
   const auto &req = downstream_->request();
 
   auto output = downstream_->get_request_buf();
@@ -763,8 +770,6 @@ int HttpDownstreamConnection::end_upload_data() {
                                             http2::HDOP_STRIP_ALL);
     output->append("\r\n");
   }
-
-  return 0;
 }
 
 namespace {

src/shrpx_http_downstream_connection.h

@@ -53,6 +53,7 @@ public:
   virtual int push_request_headers();
   virtual int push_upload_data_chunk(const uint8_t *data, size_t datalen);
   virtual int end_upload_data();
+  void end_upload_data_chunk();
 
   virtual void pause_read(IOCtrlReason reason);
   virtual int resume_read(IOCtrlReason reason, size_t consumed);