DNS 预读配置

+module.exports = {
+    hosts: [
+        '//cdn.yoho.cn',
+        '//static.yohobuy.com',
+        '//img10.static.yhbimg.com',
+        '//img11.static.yhbimg.com',
+        '//img12.static.yhbimg.com',
+        '//img13.static.yhbimg.com',
+        '//analytics.m.yohobuy.com',
+    ]
+};
+

 'use strict';
 
 const fs = require('fs');
+const dnsPrefetch = require('../../config/dns-prefetch');
+
 let devHost = '127.0.0.1';
 
 fs.readFile('.devhost', (err, buf)=> {
@@ -12,7 +14,8 @@ fs.readFile('.devhost', (err, buf)=> {
 module.exports = () => {
     return (req, res, next) => {
         Object.assign(res.locals, {
-            devHost: devHost
+            devHost: devHost,
+            dnsPrefetch: dnsPrefetch
         });
 
         next();

@@ -10,10 +10,9 @@
         <meta name="apple-mobile-web-app-status-bar-style" content="black" />
         <meta content="telephone=no" name="format-detection" />
         <meta content="email=no" name="format-detection" />
-        <link rel="dns-prefetch" href="//cdn.yoho.cn">
-        <link rel="dns-prefetch" href="//static.yohobuy.com">
-        <link rel="dns-prefetch" href="//img12.static.yhbimg.com">
-        <link rel="dns-prefetch" href="//img13.static.yhbimg.com">
+        {{#dnsPrefetch.hosts}}
+            <link rel="dns-prefetch" href="{{this}}">
+        {{/dnsPrefetch.hosts}}
 
         <script type="text/javascript">
             var isWechat = /micromessenger/i.test(navigator.userAgent || '');