bug:性能问题，不要每次都从cdn获取html文件

@@ -57,8 +57,12 @@ const middleware = require('./middleware');
 const controllers = require('./controllers');
 
 app.use('/crm/common/ok.jsp', (req, res) => {
-    res.status(204).end();
+    res.status(200).end();
 });
+app.head('*', (req, res) => {
+    res.status(200).end();
+});
+
 
 try {
     app.use(middleware.main);

@@ -2,11 +2,16 @@ const Express = require('express');
 let router = Express.Router(); // eslint-disable-line
 const rp = require('request-promise');
 const env = global.env;
+const pageCache = {};
 
 let mainProxy = (req, res) => {
     res.header('x-version', env.version);
     res.header('cache-control', 'no-store');
-    rp.get(`http://cdn.yoho.cn/yoho-shop-manage/${env.version}/index.html`).then(body => {
+    if (pageCache[env.version]) {
+        return res.send(pageCache[env.version]);
+    }
+    return rp.get(`http://cdn.yoho.cn/yoho-shop-manage/${env.version}/index.html`).then(body => {
+        pageCache[env.version] = body;
         res.send(body);
     });
 };