node.js 下 tcp socket 编程-凯发app官方网站

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1. // tcp_server.js
   
2. var net = require("net");
   
3.  
   
4. var host = "127.0.0.1"
   
5. var port = 9876
   
6. var bufsize = 256
   
7. var buf = new buffer(bufsize);
   
8.  
   
9. // connection 's event prototype is function(sock), you can also use net.createserver( function(sock){ ... } );
   
10. // the funcetion pass to net.createserver becomes the event handler for 'connection' event;
    
11. // the sock object the call back function receive unique for each connection.
    
12. function onconnection(sock)
    
13. {
    
14.     console.log("connected :" sock.remoteaddress " " sock.remoteport);
    
15.     // add a 'data' event handler to this instance of socker
    
16.     sock.on("data",function(buf)
    
17.     {
    
18.         console.log("data from clinet: " sock.remoteaddress " : " buf.tostring('utf8', 0, buf.length));
    
19.         // write back data to the connection of socket
    
20.         sock.write(buf.tostring('utf8', 0, buf.length));
    
21.     });
    
22.     // add a 'close' event handler to this instance of socker
    
23.     sock.on("close",function(data)
    
24.     {
    
25.         console.log("closed " sock.remoteaddress " " sock.remoteport);
    
26.     });
    
27. }
    
28.  
    
29. // create a server instance, you also can use another way,
    
30. /*
    
31.     var server = net.createserver();
    
32.     server.listen(port,host);
    
33.     server.on('connection',function(sock){...} );
    
34. */
    
35. var server = net.createserver( false,onconnection );
    
36. // listen at port host
    
37. server.listen(port,host);
    
38.  
    
39. console.log("server listen on " host " : " port);

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1. // tcp_client.js
   
2. var net = require("net");
   
3.  
   
4. var host = "127.0.0.1"
   
5. var port = 9876
   
6. var bufsize = 256
   
7. var buf = new buffer(bufsize);
   
8. var client = new net.socket();
   
9. // open a connection for a gived socket
   
10. client.connect(port,host,function()
    
11. {
    
12.     console.log("connect to :" host " : " port);
    
13.     // write data to server
    
14.     var len = buf.write("0123456789");
    
15.     console.log("data :" buf.tostring('utf8', 0, len));
    
16.     client.write(buf);
    
17. });
    
18. // add a 'data' event handler for the client socket,the callback funtion receive the data whick server give back
    
19. client.on("data",function(buf)
    
20. {
    
21.     console.log("data :" buf.tostring('utf8', 0, buf.length));
    
22.     client.write(buf);
    
23. });
    
24.  
    
25. // add a 'close' event handler for the client socket
    
26. client.on("close",function()
    
27. {
    
28.     console.log("connect closed!");
    
29. });

参考：

         node.js v0.10.12 manual & documentation

         

         node 入门

         

        

         tcp scoket programming in node.js