From 15d314fad58e990fbf2e5b14452de0a8b6dfcc01 Mon Sep 17 00:00:00 2001
From: Santiago Gimeno <santiago.gimeno@gmail.com>
Date: Thu, 27 Oct 2022 15:20:26 +0200
Subject: [PATCH 1/2] build,win: pass --debug-nghttp2 to configure

---
 vcbuild.bat | 1 +
 1 file changed, 1 insertion(+)

diff --git a/vcbuild.bat b/vcbuild.bat
index 62334130f98abe..0bae0ea282aa10 100644
--- a/vcbuild.bat
+++ b/vcbuild.bat
@@ -197,6 +197,7 @@ if defined link_module      set configure_flags=%configure_flags% %link_module%
 if defined i18n_arg         set configure_flags=%configure_flags% --with-intl=%i18n_arg%
 if defined config_flags     set configure_flags=%configure_flags% %config_flags%
 if defined target_arch      set configure_flags=%configure_flags% --dest-cpu=%target_arch%
+if defined debug_nghttp2    set configure_flags=%configure_flags% --debug-nghttp2
 if defined openssl_no_asm   set configure_flags=%configure_flags% --openssl-no-asm
 if defined DEBUG_HELPER     set configure_flags=%configure_flags% --verbose
 if "%target_arch%"=="x86" if "%PROCESSOR_ARCHITECTURE%"=="AMD64" set configure_flags=%configure_flags% --no-cross-compiling

From 5d0b73d0665081723da75b1cecff552f41439022 Mon Sep 17 00:00:00 2001
From: Santiago Gimeno <santiago.gimeno@gmail.com>
Date: Thu, 27 Oct 2022 14:25:55 +0200
Subject: [PATCH 2/2] src: print nghttp2 logs when using --debug-nghttp2

---
 node.gyp          |  3 +++
 src/node_http2.cc | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/node.gyp b/node.gyp
index a3ae91c90124de..a22af3b479aadf 100644
--- a/node.gyp
+++ b/node.gyp
@@ -859,6 +859,9 @@
             },
           ],
         }],
+        [ 'debug_nghttp2==1', {
+          'defines': [ 'NODE_DEBUG_NGHTTP2=1' ]
+        }],
       ],
       'actions': [
         {
diff --git a/src/node_http2.cc b/src/node_http2.cc
index f8f8af3a3dc2e6..fe66f9761d0c70 100644
--- a/src/node_http2.cc
+++ b/src/node_http2.cc
@@ -3179,6 +3179,12 @@ void SetCallbackFunctions(const FunctionCallbackInfo<Value>& args) {
 #undef SET_FUNCTION
 }
 
+#ifdef NODE_DEBUG_NGHTTP2
+void NgHttp2Debug(const char* format, va_list args) {
+  vfprintf(stderr, format, args);
+}
+#endif
+
 void Http2State::MemoryInfo(MemoryTracker* tracker) const {
   tracker->TrackField("root_buffer", root_buffer);
 }
@@ -3344,6 +3350,10 @@ void Initialize(Local<Object> target,
 #undef V
 
   target->Set(context, env->constants_string(), constants).Check();
+
+#ifdef NODE_DEBUG_NGHTTP2
+  nghttp2_set_debug_vprintf_callback(NgHttp2Debug);
+#endif
 }
 }  // namespace http2
 }  // namespace node