nodejs学习资源

http://blog.csdn.net/mingcai_xiong/article/details/52669074

nodejs——网络编程模块

http://blog.csdn.net/mingcai_xiong/article/details/52669074 //翻译API

https://nodejs.org/api/net.html#net_socket_destroy_exception  //英文API

https://www.oschina.net/code/snippet_113421_36184 

nodejs简单的telnet聊天室

var tcp = require('net');

 

    varServer = tcp.createServer();

    varpwd=[]; // keep tracks of connected clients

    varip=[];  // keeps tracks of connected clients IP address

    varCpwd = "1";// password that you require to login

 

      Server.on('connection' ,function(conn){

        conn.setEncoding('utf-8');

        conn.write("Password:");// ask user for password on their terminal

        console.log("["+ conn.remoteAddress + "] has joined the chat");

 

 

      conn.on('data', function(data){

        if(pwd.indexOf(conn)>-1){//check if it is an old client or a new client

          console.log("["+ conn.remoteAddress + "]:" + data);

          if(pwd.length > 0){// check if atleast one client is connected

 

            sendMessage(conn , data);// broadcast message to all client connected

 

          }

        }

        else{//if it is a new client then server should first check for password

          data= data.toString('utf-8').trim();

          varmessage = " has joined the chat";

          if(Cpwd == data){// if it is a new client than check for password

            pwd.push(conn);

            ip.push(conn.remoteAddress);

            sendMessage(conn , message);

          }

 

          else{conn.write("Password rejected:"+ data);conn.end();}// disconnect client

        }

 

      });

 

      conn.on('end', function() {// remove the client from reference array

 

       vari , client;

         for(iin pwd){

           client = pwd[i];

           if(!client.writable){

             pwd.splice(i,1);

             console.log(ip[i]+" has left the chat");

             ip.splice(i,1);

           }

         }

 

     });

 

});

 

    functionsendMessage(conn , message){ //function to send message to all connected client

 

      vari , client;

      for(iin pwd){

        client = pwd[i];

        if(client.writable){    

          if(conn === client){      

            client.write("[me]:"+ message);        

          }     

          else

            client.write("["+ conn.remoteAddress +"]:"+ message);

        }

        else{

          pwd.splice(i , 1);

          console.log(ip[i]+" has left the chat");

          ip.splice(i,1);

        }  

      }

    }

    Server.listen(8000);