app.all('*',function(req,res,next) {
    res.header("Access-Control-Allow-Origin",");
    res.header(Access-Control-Allow-HeadersX-Requested-WithAccess-Control-Allow-MethodsPUT,POST,GET,DELETE,OPTIONSX-Powered-By 3.2.1)
    res.header(Content-Typeapplication/json;charset=utf-8);
    next();
});