Instructions for the http.createServer method in node.js

method description:

This function is used to create an HTTP server and to use requestListener as a listener for request events.

syntax:

http.createServer([requestListener])

Since this method belongs to the http module, it is necessary to introduce the http module (var http= require(" http "))

before using it

receive parameters:

The requestListener     request handler, which is automatically added to the request event, passes two arguments:

      req   request object to see what properties req has, see "http.request attribute integration".

      res     response object, the response to be made upon receipt of a request. To see what attributes res has, see "http.response attribute integration."

example:

In the example, res specifies the response header, and the response body content is node.js, ending with end.

Finally, the listen function is called to listen on port 3000.

var http = require('http');

http.createServer(function(req, res){

 res.writeHead(200, {'Content-type' : 'text/html'});

 res.write('<h1>Node.js</h1>');

 res.end('<p>Hello World</p>');

}).listen(3000);

source code:

exports.createServer = function(requestListener) {

  return new Server(requestListener);

};