nodejs 实现 操作数据库 远程调用api 监听端口

var http = require('http');
var url = require('url');
var util = require('util');
var querystring=require('querystring');  
var mysql  = require('mysql'); 
//http://127.0.0.1:8989/type?type=3 请求方式
//http://xxx.cn/domain/test/all?sort=&size=2
http.createServer(function(req,res){
	res.writeHead(200, {'Content-Type': 'text/plain'});

	console.log(url.parse(req.url,true).query.type);


	var type = url.parse(req.url,true).query.type;

	// console.log("type:",type);

	if(type==1)
	{
		// http 请求 额外 url
		http.get('http://xxxx.cn/domain/test/all?sort=&size=2',function(reqs,ress){  
		    var html='';  
		    reqs.on('data',function(data){  
		        html+=data;  
		    });
		    reqs.on('end',function(){  
		         res.end(html);
		    }); 
		}); 
	}
	

	if(type==2)
	{
		// 操作数据库
		var connection = mysql.createConnection({    
		  host     : '127.0.0.1',      
		  user     : 'root',             
		  password : '',      
		  port: '3306',                  
		  database: 'xxxx',
		});
		connection.connect();

		var data ='';
		connection.query('select * from test2',function selectCb(err, results, fields){
			if (err)throw err; 
	       	if(results)results = JSON.stringify(results);
		    connection.end();
		    res.end(results);
		});
	}

	if(type==3)
	{
		
	}
	

}).listen(8989);

console.log("server is running http:127.0.0.1:8989");