web_server.js

var http = require('http');
var fs = require('fs');
var url = require('url');
var ContentType = require('./server/content_type')
var contentType = new ContentType();

 
// 创建服务器
http.createServer( function (request, response) {  
   // 解析请求，包括文件名
   var pathname = url.parse(request.url).pathname;

   if(pathname.substr(1) == 'msg'){

        response.writeHead(200, {'Content-Type': 'text/plain;charset=UTF-8'});  
        response.write('《流浪地球》火爆上线！');
        response.end();
        
   }else{

    var type = contentType.getType(pathname);

    fs.readFile(pathname.substr(1), function (err, data) {
       if (err) {
          console.log(err);
          response.writeHead(404, {'Content-Type': 'text/html;charset=UTF-8'});
       }else{             
          // HTTP 状态码: 200 : OK
          // Content Type: text/plain
          response.writeHead(200, {'Content-Type': type});    
          
          if(pathname.endsWith('.png')||pathname.endsWith('.jpg')){
             response.write(data,'binary');   
             
          }else{
             response.write(data);  
          }
            
       }
       //  发送响应数据
       response.end();
    });  
   }
   

}).listen(8080);
 
// 控制台会输出以下信息
console.log('Server running at http://127.0.0.1:8080/');