网络编程示例
1. 网络编程
1.1 TCP
//server
var net = require('net');
var server = net.createServer(function(socket){
socket.on('data',function(data){
socket.write('hello world');
});
socket.on('end',function(){
console.log('end');
});
socket.write('welcome');
});
server.listen(8000,'127.0.0.1',function(){
console.log('server bound');
});
//client
var net = require('net');
var client = net.connect(8000,'127.0.0.1',function(){
console.log('client connected');
client.write('hi!\r\n');
});
client.on('data',function(data){
console.log(data.toString());
client.end();
});
client.on('end',function(){
console.log('client end');
});
1.2 UDP
//server
var dgram = require('dgram');
var server = dgram.createSocket('udp4');
server.on('message',function(msg,rinfo){
console.log(msg+rinfo.address+rinfo.port);
});
server.on('listening',function(){
var address = server.address();
console.log(address.address+address.port);
});
server.bind(9000,'127.0.0.1');
//client
var dgram = require('dgram');
var client = dgram.createSocket('udp4');
var message = new Buffer('hello world');
client.send(message,0,message.length,9000,'127.0.0.1',function(err,bytes){
client.close();
});
1.3 HTTP
//server
var http = require('http');
var server = http.createServer(function(req,res){
res.writeHead(200,{'Content-Type':'text/plain'});
var chunks = [];
req.on('data',function(chunk){
chunks.push(chunk);
})
req.on('end',function(){
var buffer = Buffer.concat(chunks);
res.end('hello world!\r\n');
});
});
server.listen(9999,'127.0.0.1');
//client
var options = {
hostname:'127.0.0.1',
port:9999,
path:'/',
method:'GET'
}
var req = http.request(options,function(res){
console.log(res.statusCode);
console.log(JSON.stringify(res.headers));
res.setEncoding('utf8');
res.on('data',function(chunk){
console.log(chunk);
})
});
req.end();
