Node.js http.IncomingMessage.trailers Method
The http.IncomingMessage.trailers is an inbuilt application programming interface of the class Incoming Message within http module which is used to get the request/response trailers to object.
Syntax:
request.trailers or response.trailers
Parameters: This method does not accept any argument as a parameter.
Return Value: This method returns the request or response trailers object.
Example 1: Filename: index.js
Javascript
// Node.js program to demonstrate the // request.trailers 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 trailers // by using request.trailers Api const value = request.trailers; // Display the request trailers console.log(value) // Display the 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... {} 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.
Example 2: Filename: index.js
Javascript
// Node.js program to demonstrate the // request.trailers APi // Importing http module const http = require( 'http' ); // Request and response handler const http2Handlers = (request, response) => { // Getting trailers // by using request.trailers Api const value = request.trailers; // Display the request trailer console.log(value) // Display result response.end( "w3wiki" , '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... {} displaying the result... {} displaying the result... server is closed server is closedserver is closed
Browser Output: Paste the localhost address http://localhost:3000/. In the search bar of the browser.
w3wiki
Reference: https://nodejs.org/dist/latest-v12.x/docs/api/http.html#http_message_trailers
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