app.all("*",function(req,res,next){
res.header("ACCESS-Control-Allow-Origin","*");
res.header("ACCESS-Control-Allow-Headers","X-Requested-Width");
res.header("ACCESS-Control-Allow-Methods","PUT,POST,GET,DELETE,OPTIONS");
res.header("X-Powered-By",'3.2.1');
res.header("Content-Type","application/json;charset=utf-8");
next();
});