From 972d404ebc916b1bbe62c4b0de0e074a2ddd6f6f Mon Sep 17 00:00:00 2001
From: Star Brilliant <coder@poorlab.com>
Date: Fri, 23 Mar 2018 15:32:51 +0800
Subject: [PATCH] Add Last-Modified header

---
 doh-server/google.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/doh-server/google.go b/doh-server/google.go
index e670de0..511fadc 100644
--- a/doh-server/google.go
+++ b/doh-server/google.go
@@ -31,6 +31,7 @@ import (
 	"net/http"
 	"strconv"
 	"strings"
+	"time"
 
 	"../json-dns"
 	"github.com/miekg/dns"
@@ -178,6 +179,9 @@ func (s *Server) generateResponseGoogle(w http.ResponseWriter, r *http.Request,
 	}
 
 	w.Header().Set("Content-Type", "application/json; charset=UTF-8")
+	now := time.Now().UTC().Format(http.TimeFormat)
+	w.Header().Set("Date", now)
+	w.Header().Set("Last-Modified", now)
 	if respJSON.HaveTTL {
 		if req.isTailored {
 			w.Header().Set("Cache-Control", "private, max-age="+strconv.Itoa(int(respJSON.LeastTTL)))