Merge branch 'heshuo' into 'master'

测试跨域

See merge request !5

index.js

@@ -10,7 +10,11 @@ app.use((req, res, next) => {
     res.header("Access-Control-Allow-Credentials", "true");
     res.header("Access-Control-Allow-Headers", "Content-Type,Access-Token,adminid");
     res.header("Access-Control-Expose-Headers", "*");
-    next();
+    if (req.method == 'OPTIONS') {
+      res.send(200); /*让options请求快速返回*/
+    } else {
+      next();
+    }
 });
 
 // var BaseUrl = "http://localhost/api/";