text: var http=require('http');
  http.createServer(function(request,response){
      response.writeHead(200,{'Content-Type':'text/html'});
      if(request.url!=="/favicon.ico"){//清楚二次访问
          console.log("访问");
          response.write("hello,world");
          response.end();
      }
  
  }).listen(8000);
  console.log("Server running at http://127.0.0.8000/")
  