javascript - Edit the response in ExpressJS -

i'm trying edit response request in express. when request xhr request, want return body inside javascript object (this return different parts of page different pieces in javascript object, i.e. { header: '<header></header>', footer: '<footer></footer>' }.

i can't seem find part of response object holds actual response. direction think i'm meant go, can't work.

app.use(function(req, res, next) {      res.on('send', function() {          if(req.xhr) {             //if page requested ajax, return json             res.body = {body: res.body};            }      });      next(); }); 

you'll want monkey-patch send method

app.use(function(req,res,next){     var send=res.send;     res.send = function(){         //use arguments here body out (won't first property if there's response code passed through)         console.log("sending",arguments);          send.apply(res,arguments);     }     next(); }) 

look @ source response.send method find out how parse arguments. https://github.com/visionmedia/express/blob/master/lib/response.js#l81