add content-type

nodejs/routes/all.js

@@ -2,6 +2,7 @@ module.exports = function(req, res, next) {
     res.header('Access-Control-Allow-Origin', '*');
     res.header('Access-Control-Allow-Headers', 'Content-Type, Content-Length, Authorization, Accept, X-Requested-With , yourHeaderFeild');
     res.header('Access-Control-Allow-Methods', 'PUT, POST, GET, DELETE, OPTIONS');
+    res.header('content-type', 'application/json; charset=utf-8');
 
     if (req.method == 'OPTIONS') {
         res.send(200);