node.js - reading a file and output to http -

how join these scripts 1 have done not work. think callbacks getting messed up.

with code able output text browser.

var http = require('http'); http.createserver(function (req, res) {   res.writehead(200, {'content-type': 'text/plain'});   res.end('hello world\n'); }).listen(1337, '127.0.0.1'); console.log('server running @ http://127.0.0.1:1337/'); 

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with code able read text file , log console.

fs = require('fs') fs.readfile('/etc/hosts', 'utf8', function (err,data) {   if (err) {     return console.log(err);   }   console.log(data); }); 

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but wont work together, why????????????????? help.

   var http = require('http');     http.createserver(function (req, res) {         fs = require('fs')        fs.readfile('/etc/hosts', 'utf8', function (err,data) {          if (err) {            return console.log(err);          }          console.log(data);          res.writehead(200, {'content-type': 'text/plain'});          res.end('hello world\n');     });       }).listen(1337, '127.0.0.1');     console.log('server running @ http://127.0.0.1:1337/'); 

you need return response after readfile finishes. writing response in completion callback of readfile e.g.

http.createserver(function (req, res) {      fs.readfile('/etc/hosts', 'utf8', function (err,data) {          if (err) {            return console.log(err);          }           console.log(data);          res.writehead(200, {'content-type': 'text/plain'});          res.end(data);     });  }).listen(1337, '127.0.0.1');