Socket server Learning (1)

Objective: To implement a simple socket Chat Server

Server Environment: nodejs

Client: Mac terminal + nodejs, unity

 

I. server programs

VaR net = require ('net'); var timeout = 60000; var mess = ""; var clientlist = []; // timeout var listenport = 1234; // listening port function sendall (socket, message) {for (VAR I = 0; I <clientlist. length; I ++) {If (clientlist [I]. writable) {If (clientlist [I]! = Socket) clientlist [I]. write (socket. remoteport + ':' + message);} else {clientlist [I]. destroy () ;}}var Server = net. createserver (function (socket) {clientlist. push (socket); // we get a connection-the connection is automatically associated with a socket object mess = socket. remoteaddress + ':' + socket. remoteport; console. log ('start connection> '+ mess); // socket. setencoding ('binary '); // timeout event socket. setTimeout (timeout, function () {console. log ('Connection timeout'); socket. end () ;}); // receives the data socket. on ('data', function (data) {sendall (socket, data); console. log (data. tostring ('utf8');}); // data error event socket. on ('error', function (exception) {console. log ('socket error: '+ exception); socket. end () ;}); // The client closes the event socket. on ('end', function (data) {console. log ('end connection >>' + mess) ;}); socket. on ('close', function (data) {console. log ('close connection> '+ mess); console. log ('**********************************'); });}). listen (listenport); // The server listens to the Event Server. on ('listenering', function () {console. log ("server listening:" + server. address (). port) ;}); // Server Error Event Server. on ("error", function (exception) {console. log ("server error:" + exception );});

 

Ii. Mac client program

var net = require(‘net‘);var host = process.argv[2];var port =Number(process.argv[3]);var socket = net.connect(port,host);var inbuffer;socket.on(‘connect‘,function(){process.stdin.resume();process.stdin.setEncoding(‘utf8‘);process.stdin.on(‘data‘, function (chunk) {        socket.write(chunk);  });  });//socket.setEncoding(‘utf8‘);socket.on(‘data‘,function(data){    console.log(data.toString(‘utf8‘));});socket.on(‘end‘,function(){    process.stdin.pause();});

 

Iii. Unity client C # script

using System.Text;using System.Net;using System.Net.Sockets;using System.Collections.Generic;using System.IO;using System.Runtime.InteropServices;using System.Runtime.Serialization;using System.Runtime.Serialization.Formatters.Binary; public class TestSocket : MonoBehaviour {    string say="";    string mes="";    string rec="";    Socket clientSocket;    public void ConncetServer(){        IPAddress ip = IPAddress.Parse ("127.0.0.1");        IPEndPoint endpoint = new IPEndPoint (ip, 1234);        if (clientSocket!=null&&clientSocket.Connected) {                        Debug.Log ("connected already");                            mes="connected already";                } else {            if(clientSocket!=null){                IAsyncResult result=clientSocket.BeginConnect(endpoint,new AsyncCallback(connectCallback),clientSocket);                                bool success=result.AsyncWaitHandle.WaitOne(5000,true);                                if(!success){                    clientSocket.Close ();                    Debug.Log("connection timed out");                    mes="connection timed out";                }else{                    Thread thread=new Thread(new ThreadStart(receiveSocket));                    thread.IsBackground=true;                    thread.Start();                }            }        }    }    void Send(){        if (clientSocket.Connected) {            try{                byte[] sendmsg = Encoding.UTF8.GetBytes (say);                                clientSocket.Send (sendmsg);                rec+="me:  "+say+"\n";            }    catch (Exception e){                Debug.Log("exception happend during sending message :  "+e);            }                        } else {            Debug.Log("need connection");            mes="need connection";        }    }    void CloseSocket(){        clientSocket.Close ();        mes = "closed.";    }    void connectCallback(IAsyncResult connect){        Debug.Log ("connection started");    }    void receiveSocket(){        while (clientSocket.Connected) {            try{                byte[] bytes=new byte[4096];                clientSocket.Receive(bytes);                rec+=Encoding.UTF8.GetString(bytes)+"\n";                                     }    catch (Exception e){                    mes="exception: "+e;                    clientSocket.Close();                    Debug.Log("exception;  "+e);                }        }    }    // Use this for initialization    void Start () {        clientSocket = new Socket (AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);    }        // Update is called once per frame    void Update () {        }    void OnGUI(){        say = GUI.TextField (new Rect(0.0f,Screen.height*0.5f+5.0f,Screen.width-105.0f,50.0f),say);        if(GUI.Button(new Rect(0.0f,Screen.height * 0.5f+60.0f,100.0f,50.0f),"connect"))            ConncetServer();        if (GUI.Button (new Rect (Screen.width - 100.0f, Screen.height * 0.5f + 5.0f, 100.0f, 50.0f), "send")) {            Send ();            say="";        }        if(GUI.Button(new Rect(105.0f,Screen.height * 0.5f+60.0f,100.0f,50.0f),"close"))            CloseSocket();        GUI.Label (new Rect (220.0f, Screen.height * 0.5f + 170.0f, 100.0f, 25.0f), mes);        GUI.TextArea (new Rect(0.0f,0.0f,Screen.width,Screen.height*0.5f),rec);    }}