NodeJS设置Header解决跨域问题

转载： NodeJS设置Header解决跨域问题

 app.all('*', 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');
     if (req.method == 'OPTIONS') {
         res.send(200);
     } else {
         next();
     }
 });