创建简单的node服务器实例(分享)

var http = require('http')

var url = require('url')
var fs = require('fs')
var path = require('path')
var mime = require('./mime.js')
var qs = require('querystring')
 
http.createServer(function(req,res){
  var url1 = req.url
  var pathname = url.parse(url1).pathname
  //打印路径
  console.log(pathname)
  //取扩展名
  var ext = path.extname(pathname).slice(1)
  var contentType = mime.types[ext]
   
  fs.exists(__dirname+pathname,function(e){
    if(e){
      console.log("文件存在")
      fs.readFile(__dirname+pathname,function(err,data){
        if(!err){
          //返回数据
          res.writeHead(200,{"Content-Type":contentType+";charset=utf-8","Aess-Control-Allow-Origin":""})
          res.write(data)
          res.end()
        }else{
          console.log("读文件出错")
        }
      })
    }else{
      console.log("文件不存在")
       
    }
  })
  //设置端口
}).listen(9796)