Added middleware for processing request_id grpc and http requests (#6805)

weed/util/request_id.go

@@ -0,0 +1,20 @@
+package util
+
+import "context"
+
+const (
+	RequestIdHttpHeader = "X-Request-ID"
+	RequestIDKey        = "x-request-id"
+)
+
+func GetRequestID(ctx context.Context) string {
+	if ctx == nil {
+		return ""
+	}
+	id, _ := ctx.Value(RequestIDKey).(string)
+	return id
+}
+
+func WithRequestID(ctx context.Context, id string) context.Context {
+	return context.WithValue(ctx, RequestIDKey, id)
+}