Error [ERR_STREAM_WRITE_AFTER_END]: write after end [npm-request with socket.io]

Error [ERR_STREAM_WRITE_AFTER_END]: write after end [npm-request with socket.io]
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#1

On my server side I have socket server listening, and in my own laptop I have soket.io-client service and whenever I turn on both they are connecting. ANd when other people request to my server, server sends that request to my laptop and my laptop gets data from localhost using npm-request and gives back the returned data to the server then server show that information to the user.

And here is the error on my server side:

/*

throw er; // Unhandled 'error' event
      ^

**Error [ERR_STREAM_WRITE_AFTER_END]: write after end**
    at write_ (_http_outgoing.js:572:17)
    at ServerResponse.write (_http_outgoing.js:567:10)
    at Socket.<anonymous> (/home/fizmasoft/public_html/api/index.js:37:9)
    at Socket.emit (events.js:187:15)
    at /home/fizmasoft/public_html/api/node_modules/socket.io/lib/socket.js:528:12
    at process._tickCallback (internal/process/next_tick.js:61:11)
Emitted 'error' event at:
    at writeAfterEndNT (_http_outgoing.js:634:7)
    at process._tickCallback (internal/process/next_tick.js:63:19)
    
    */

My server side code down belove

var http = require('http');
var fs = require('fs');
var socket_g=null, numOfUsers=0;
var url = require('url'),qs = require('querystring');

var server = http.createServer(function(req, res) {
   	if(numOfUsers!=0){

   		var urlParts = url.parse(req.url, true),
        urlParams = urlParts.query, 
        urlPathname = urlParts.pathname,
        body = '',
        reqInfo = {};
 
	    req.on('data', function (data) {
	        body += data; 
	    });
	 
	    req.on('end', function () {
	        reqInfo.urlPathname = urlPathname; 
	        reqInfo.urlParams = urlParams; 
	        reqInfo.body = qs.parse(body); 
	        reqInfo.urlParts = urlParts;
	        
	        console.log(reqInfo.urlPathname)
	    	  socket_g.emit('event', { "path": reqInfo.urlPathname});
	    });

	    socket_g.on('data',function(data){
	    	console.log(data.c)
    		if(data.c=='application/x-httpd-php' || data.c=='/'){
				  res.writeHead(200, { 'Content-Type': 'text/html' });
				  res.write(data.data);
				  res.end();
    		}else{
				  res.writeHead(200, { 'Content-Type': data.c });
				  res.write(data.data);
				  res.end();
    		}	    	
	    	
	  	});
   	}else{
   		res.writeHead(200, { 'Content-Type': 'text/html' });
		  res.end("<h2>There is no client connected!</h2>");
   	}
});

var io = require('socket.io').listen(server);
io.sockets.setMaxListeners(0);
	
io.sockets.on('connection', function (socket) {
    /*console msg*/
    console.log('user connected!');
    /*console msg*/
    socket.setMaxListeners(0);
  	numOfUsers++;
    socket_g=socket;
    socket.on('disconnect', function(){
  		numOfUsers++;
    	/*console msg*/
    	console.log('user disconnected');
    	/*console msg*/
  	});
});


server.listen(3333);

And belove my client side code, which is working on my laptop

var socket = require('socket.io-client')('http://*.*.*.*:3333/');
var http=require("http");
var r = require('request');
var mime = require('mime');
var path = require('path');

socket.on('connect', function(){
	console.log("connected");
});
socket.on('event', function(data){
	console.log(mime.getType(path.extname(data.path).substr(1)));

	var contentType=mime.getType(path.extname(data.path).substr(1));

  r.get({url: "http://localhost/check"+data.path},
		function(error, response, body){
		   //console.log(body);
		   if(contentType){
		   	socket.emit('data', { "data": body,'c':contentType });
		   }
		});

});
socket.on('disconnect', function(){
	console.log("disconnected")
});