Node.js response.removeHeader() Method
Last Updated :
06 Apr, 2023
The response.removeHeader() (Added in v0.9.3) property is an inbuilt property of the ‘http’ module which removes a header identified by a name that's queued for implicit sending. The header name matching is case-insensitive. The object returned by the response.getHeaders() method does not prototypically inherit from the JavaScript Object.
In order to get a response and a proper result, we need to import ‘http’ module.
const http = require('http');
Syntax:
response.removeHeader(name);
Parameters: This property accepts a single parameter as mentioned above and described below:
- name <String>: It accepts the name of the header and it is case-insensitive.
Return Value: It does not return any value, instead removes a header that's queued for implicit sending.
The below example illustrates the use of response.removeHeader() property in Node.js.
Example 1: Filename: index.js
JavaScript
// Node.js program to demonstrate the
// response.removeHeader() Method
// Importing http module
const http = require('http');
// Setting up PORT
const PORT = process.env.PORT || 3000;
// Creating http Server
const httpServer = http.createServer(
function (req, response) {
// Setting up Headers
response.setHeader('Alfa', 'Beta');
response.setHeader('Cookie-Setup',
['Alfa=Beta', 'Beta=Romeo']);
console.log("Before removing headers...")
// Checking and printing the headers
console.log("When Header is set an Array:",
response.hasHeader('Cookie-Setup'));
// Removing Headers
response.removeHeader('Cookie-Setup');
console.log("After removing headers...")
// Checking and printing the headers
console.log("When Header is set an Array:",
response.hasHeader('Cookie-Setup'));
// Printing those headers
console.log(response.getHeaders());
response.end();
});
// Listening to http Server
httpServer.listen(PORT, () => {
console.log("Server is running at port 3000...");
});
Now run http://localhost:3000/ in the browser.
Output: (In Console)
>> Server is running at port 3000...
>> Before removing headers...
When Header is set an Array: true
>> After removing headers...
When Header is set an Array: false
>> [Object: null prototype] { alfa: 'Beta'}
Example 2: Filename: index.js
JavaScript
// Node.js program to demonstrate the
// response.removeHeader() Method
// Importing http module
const http = require('http');
// Setting up PORT
const PORT = process.env.PORT || 3000;
// Creating http Server
const httpServer = http.createServer(
function (req, response) {
// Setting up Headers
response.setHeader('Alfa', 'Beta');
response.setHeader('Alfa1', '');
response.setHeader('Alfa2', 5);
response.setHeader('Cookie-Setup',
['Alfa=Beta', 'Beta=Romeo']);
console.log("Before removing headers...")
// Checking and printing the headers
console.log("When Header is set an Array:",
response.hasHeader('Cookie-Setup'));
console.log("When Header is set an 'Beta':",
response.hasHeader('Alfa'));
console.log("When Header is set '':",
response.hasHeader('Alfa1'));
console.log("When Header is set number 5:",
response.hasHeader('alfa2'));
console.log("When Header is not set:",
response.hasHeader('Content-Type'));
// Removing Headers
response.removeHeader('Cookie-Setup');
response.removeHeader('ALFA2');
console.log("After removing headers...")
// Checking and printing the headers
console.log("When Header is set an Array:",
response.hasHeader('Cookie-Setup'));
console.log("When Header is set an 'Beta':",
response.hasHeader('Alfa'));
console.log("When Header is set '':",
response.hasHeader('Alfa1'));
console.log("When Header is set number 5:",
response.hasHeader('alfa2'));
console.log("When Header is not set:",
response.hasHeader('Content-Type'));
// Getting the set Headers
const headers = response.getHeaders();
// Printing those headers
console.log(headers);
const Output = "Hello GeeksforGeeks...,"
+ " Available headers are:"
+ JSON.stringify(headers);
// Prints Output on browser in response
response.write(Output);
response.end();
});
// Listening to http Server
httpServer.listen(PORT, () => {
console.log("Server is running at port 3000...");
});
Run the index.js file using the following command:
node index.js
Output: (In Console)
>> Server is running at port 3000...
>> Before removing headers...
When Header is set an Array: true
When Header is set an 'Beta': true
When Header is set '': true
When Header is set number 5: true
When Header is not set: false
>> After removing headers...
When Header is set an Array: false
When Header is set an 'Beta': true
When Header is set '': true
When Header is set number 5: false
When Header is not set: false
>> [Object: null prototype] { alfa: 'Beta', alfa1: '' }
Now run http://localhost:3000/ in the browser.
Output: (In Browser)
Hello GeeksforGeeks..., Available headers are:{"alfa":"Beta", "alfa1":""}
Reference: https://nodejs.org/api/http.html#http_response_removeheader_name
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