Node.js http.IncomingMessage.headers Method
The http.IncomingMessage.headers is an inbuilt application programming interface of class IncomingMessage within the HTTP module which is used to get all the request/response headers objects.
Syntax:
const message.headers
Parameters: This method does not accept any argument as a parameter.
Return Value: This method returns all the request/response headers objects.
Example 1:
Filename: index.js
// Node.js program to demonstrate the
// request.headers 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 (request, response) {
// Getting request/response header
// by using request.headers method
const value = request.headers;
// Display header
console.log(value.connection)
// Display result
response.end("hello world", 'utf8', () => {
console.log("displaying the result...");
httpServer.close(() => {
console.log("server is closed")
})
});
});
// 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:
Output: In-Console Server is running at port 3000... keep-alive displaying the result...
Now go to http://localhost:3000/ in the browser, and you will see the following output:
hello world
Example 2:
Filename: index.js
// Node.js program to demonstrate the
// request.headers Method
// Importing http module
const http = require('http');
// Request and response handler
const http2Handlers = (request, response) => {
// Getting request/response header
// by using request.headers method
const value = request.headers;
// Display header
console.log(value.host)
// Display result
response.end("hello world!!", 'utf8', () => {
console.log("displaying the result...");
httpServer.close(() => {
console.log("server is closed")
})
});
};
// Creating http Server
const httpServer = http.createServer(
http2Handlers).listen(3000, () => {
console.log("Server is running at port 3000...");
});
Run the index.js file using the following command.
node index.js
Output:
Server is running at port 3000... localhost:3000 displaying the result...
Now go to http://localhost:3000/ in the browser, and you will see the following output:
hello world!!
Reference: https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_message_headers
