node. JS Learning Notes under Windows (5)---Creating Servers and clients with node. js

// introducing the HTTP module var http = require (' http '); // Call HTTP Createserver method, this method has a callback function, this callback number // the function is to execute this callback function http.createserver (function  (req, res) {  //) until the request is sent to the server.  Send  res.end (' Hello world\n ');}). Listen (3000, "127.0.0.1"); // port and IP bindings console.log (' Server running at Http://127.0.0.1:3000/');

The above code, create a server, and set the content sent to the client, the following talk about the redirection in node. js

var http = require (' http '); Http.createserver (function  (req, res) {  // redirect , Writehead method  res.writehead (301, {    ' location ': ' Http://www.baidu.com '   });    Res.end ();}). Listen ("127.0.0.1"); Console.log (' Server running at Http://127.0.0.1:3000/');

By setting up a route to respond to different requests ( essentially ), this is actually getting more complicated, because if there are many kinds of responses, If--else will be more and more, and the express framework will be introduced later.

varHTTP = require (' http '), URL= require (' URL '); Http.createserver (function(req, res) {//parse URL, get path name  varpathname =Url.parse (req.url). Pathname; if(Pathname = = = '/')) {Res.writehead (200, {      ' Content-type ': ' Text/plain '    }); Res.end (' Home page\n ')  } Else if(Pathname = = = '/about ')) {Res.writehead (200, {      ' Content-type ': ' Text/plain '    }); Res.end (' About us\n ')  } Else if(Pathname = = = '/redirect ')) {Res.writehead (301, {      ' Location ': '/'    });  Res.end (); } Else{Res.writehead (404, {      ' Content-type ': ' Text/plain '    }); Res.end (' Page not found\n ')}). Listen (3000, "127.0.0.1"); Console.log (' Server running at Http://127.0.0.1:3000/');

Create a client with node. js

 var  http = require (' http ' , Port:  80 '/' };http.get (Options ,  function   (res) { if  (Res.statuscode = = 200 "The site is up!"  );  else   {Console.log ( "The site is down! "  );  }}). On ( ' error ', function   (E) { Console.log ( There is an error: "+ e.message);});  

node. JS Learning Notes under Windows (5)---Creating Servers and clients with node. js