1.6 KiB
1.6 KiB
| title |
|---|
| HTTP |
HTTP
Node.js has a set of built-in modules which you can use without any further installation. Similarly HTTP module contains a set of functions which are required to transfer data over the Hyper Text Transfer Protocol (HTTP).
The HTTP module can create an HTTP server that listens to server ports and gives a response back to the client.
In order to to include a module, use the require() function with the name of the module.
const http = require('http');
Node.js as a Web Server
The createServer() method is used to create an HTTP server. The first argument of the res.writeHead() method is the status code, 200 means that all is OK, the second argument is an object containing the response headers.
const http = require('http');
//create a server object:
http.createServer((req, res) => {
res.writeHead(200, {'Content-Type': 'text/plain'});
res.write('Hello World!'); //write a response to the client
res.end(); //end the response
}).listen(8000); //the server object listens on port 8000
console.log("Server is listening on port no : 8000");
Steps for execution :
- You should have Node.js installed in your computer.
- Create a file app.js and paste the above code.
- Now open your console in the working directory and execute the command
node app.js. - Open your browser and enter
http://localhost:8000
Note: In order to close the server then press ctrl + C in your console for windows users.