Node.js http.IncomingMessage.rawHeaders Method
The http.IncomingMessage.rawHeaders is an inbuilt application programming interface of class Incoming Message within http module which is used to get the raw request/response headers to list exactly as they were received.
Syntax:
request.rawHeaders
Parameters: This method does not accept any argument as a parameter.
Return Value: This method returns the raw request/response headers list exactly as they were received.
Request List:
Example 1: Filename: index.js
// Node.js program to demonstrate the
// IncomingMessage.rawHeaders 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 rawHeaders
// by using request.rawHeaders Api
const value = request.rawHeaders;
// Display result
response.end("rawHeaders : " + value[0], 'utf8', () => {
console.log("displaying the result...");
//Closing the server
httpServer.close(() => {
console.log("server is closed")
})
});
});
// Listening to http Server on local port
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... displaying the result... 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.
rawHeaders : Host
Example 2: Filename: index.js
// Node.js program to demonstrate the
// IncomingMessage.rawHeaders APi
// Importing http module
const http = require('http');
// Request and response handler
const http2Handlers = (request, response) => {
// Getting rawHeaders
// by using request.rawHeaders Api
const value = request.rawHeaders;
// Display result
response.end("rawHeaders : " + value[2], 'utf8', () => {
console.log("displaying the result...");
//Closing the Server
httpServer.close(() => {
console.log("server is closed")
})
});
};
// Creating http Server and execute the server
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... displaying the result... 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.
rawHeaders : Connection
Reference: https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_message_rawheaders
