You may also need to bind `onConnection` to `this` otherwise `this.onData` 
would be invalid as well.

On Monday, March 25, 2013 9:28:06 AM UTC-7, mgutz wrote:
>
>
> Shouldn't `stream.on('data', onData);` be `this.onData`?
>
>
>
>
>
> On Monday, March 25, 2013 8:44:02 AM UTC-7, Perrier wrote:
>>
>> Hi,
>>
>> I cannot reach some of the fields of my class and I don't understand why. 
>> Someone please take a look at my code. This is the Nth one, I was changing 
>> this to var, to TCPServer.prototype.sg etc. Nothing helped.
>> I've started with a sample tcp server from Anwajler's blog 
>> here<http://anwajler.com/node.html>. 
>> It was working well, but I would like to put it into a seperate file, into 
>> a module. I've created my TCPServer class as follows:
>>
>> var net = require('net');
>> var GatewayClass = require('./Gateway.js');
>>
>> exports.TCPServer = TCPServer;
>>
>> function TCPServer(host, port) {
>> this.HOST = host;
>> this.PORT = port;
>> var tcpServer = net.createServer();
>> this.gatewayList = []; 
>>  this.findByAddressAndPort = function (address, port) {
>> var i;
>> for(i = 0; i < gatewayList.length; i++){
>> if(gatewayList[i] !== undefined) {
>> if(gatewayList[i].IP === address && gatewayList[i].Port === port) {
>> return gatewayList[i];
>> }
>> }
>> }      
>> };
>>  this.dataHandler = function (stream, data) {
>> var gateway = this.findByAddressAndPort(stream.remoteAddress, 
>> stream.remotePort);
>> gateway.Buffer.Add(data);
>> };
>>
>> this.onData = function(data) {
>> this.dataHandler(this, data);
>> }
>>
>> this.onClose = function(){
>> console.log('CONNECTION CLOSED');            
>> };
>> this.onError = function(exception) {
>> console.log('SOCKET ERROR: ' + exception);    
>> };
>>
>> this.onListen = function() {
>> tcpServer.on('connection', this.onConnection);
>> tcpServer.on('error', this.onError);
>> tcpServer.on('close', this.onClose);               
>> console.log('Server listening on ' + this.HOST +':'+ this.PORT);
>> };  
>>
>> this.onConnection = function (stream) {
>> var gw=new GatewayClass.Gateway(stream);
>> gatewayList.push(gw);
>> stream.on('data', onData);
>> console.log("Clients: ", gatewayList.length);
>> }; 
>>  this.Open = function() {
>> tcpServer.listen(this.PORT, this.HOST, this.onListen);
>> }
>> }
>>
>> TCPServer.prototype.Listen = function() {
>> this.Open();
>> }
>>
>>
>> In my main application I create an instance of TCPServer and start 
>> listening this way:
>>
>> var TCPServerClass = require('./tcpserver.js');
>>
>> var TCPServer = new TCPServerClass.TCPServer(GLOBALS.HOST, GLOBALS.PORT);
>> TCPServer.Listen();
>>
>>
>> Thanks for your help. This version says:
>>
>> events.js:130
>>     throw TypeError('listener must be a function');
>>           ^
>> TypeError: listener must be a function
>>     at TypeError (<anonymous>)
>>     at Server.EventEmitter.addListener (events.js:130:11)
>>
>> Peter
>>
>>

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