Node.js http.ServerResponse.getHeader() Method ❤️

The httpServerResponse.getHeader() is an inbuilt application programming interface of the class Server Response within http module which is used to get the response header of the particular name.

Syntax:

 response.getHeader(name)

Parameters: This method accepts the name of the header as the parameter.

Return Value: This method returns the value of the particular header object.

Example 1: Filename: index.js

Javascript

// Node.js program to demonstrate the
// response.getHeader(name) APi
 
// Importing http module
const http = require('http');
 
// Setting up PORT
const PORT = process.env.PORT || 3000;
 
// Creating http Server
const httpServer = http.createServer(
    function (request, response) {
 
        // Getting header value
        // by using response.getHeader(name) Api
        const value = response.getHeaders();
 
        // Display the header value
        console.log(value)
 
        // Display result
        response.end("hello world ", 'utf8', () => {
            console.log("displaying the result...");
 
            // Closing the server
            httpServer.close(() => {
                console.log("server is closed")
            })
        });
    });
 
// Listening to http Server
httpServer.listen(PORT, () => {
    console.log("Server is running at port 3000...");
});

Steps to run:

node index.js

Console output:

Server is running at port 3000...
[Object: null prototype] {}
displaying the result...
[Object: null prototype] {}
displaying the result...
server is closed
server is closed

Browser Output: Paste the localhost address http://localhost:3000/. In the search bar of the browser.

hello world

Example 2: Filename: index.js

Javascript

// Node.js program to demonstrate the
// response.getHeader(name) APi
 
// Importing http module
const http = require('http');
 
// Request and response handler
const http2Handlers = (request, response) => {
 
    // Setting the response header
    response.setHeader('Content-Type', 'text/html');
 
    // Getting header
    // by using response.getHeader() Api
    const value = response.getHeader('Content-Type');
 
    // Display result
    response.end("header value : "
        + value, 'utf8', () => {
            console.log("displaying the result...");
 
            // Closing the server
            httpServer.close(() => {
                console.log("server is closed")
            })
        });
};
 
// Creating http Server and listening
// on the 3000 port
const httpServer = http.createServer(
    http2Handlers).listen(3000, () => {
        console.log("Server is running at port 3000...");
    });

Steps to run:

node index.js

Console output:

Server is running at port 3000...
[Object: null prototype] {}
displaying the result...
[Object: null prototype] {}
displaying the result...
server is closed
server is closed

Browser Output: Paste the localhost address http://localhost:3000/. In the search bar of the browser.

header value : text/html

Reference: https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_response_getheader_name

Node.js http.ServerResponse.getHeader() Method

Javascript

Javascript

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