an experimental patch for quic-go per issue #3603

quic-go-19-20-13.patch

diff --git a/http3/server.go b/http3/server.go
index 0455895ec648342a88264b462eee66cb0e49b778..0c1c792c03ef78e8f43e184af39dcb29a8b0b915 100644
--- a/http3/server.go
+++ b/http3/server.go
@@ -583,6 +583,7 @@ func (s *Server) handleRequest(conn quic.Connection, str quic.Stream, decoder *q
 	ctx := str.Context()
 	ctx = context.WithValue(ctx, ServerContextKey, s)
 	ctx = context.WithValue(ctx, http.LocalAddrContextKey, conn.LocalAddr())
+	ctx = context.WithValue(ctx, quic.ConnectionTracingKey, conn.Context().Value(quic.ConnectionTracingKey))
 	req = req.WithContext(ctx)
 	r := newResponseWriter(str, conn, s.logger)
 	defer r.Flush()

snippet.go

import (
	"github.com/lucas-clemente/quic-go"
	"github.com/lucas-clemente/quic-go/http3"
)

func Foo(w http.ResponseWriter, r *http.Request) {

			traceID := ""

			// this is something dirty added to local/go-quic so we can peek into the
			// underlying connection associated the handler
			if h3connI := r.Context().Value("h3conn"); h3connI != nil {
				// spew.Dump(h3connI)
				if h3conn, ok := h3connI.(quic.Connection); ok {
					if tkV, ok := h3conn.Context().Value(quic.ConnectionTracingKey).(uint64); ok {
						// traceID = strconv.FormatUint(tk, 16)
						tk := strconv.FormatUint(tkV, 16)
						traceID = strings.Repeat("0", 20-len(tk)) + tk
					}
				}
			} else {
				// redacted
        // but here you assume H1 or H2 connection and try
        // to get data from different context value
			}

			if traceID == "" {
				traceID = "-"
			}


}