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Node.js http.ClientRequest.protocol Method
  • Last Updated : 05 Feb, 2021

The http.ClientRequest.protocol is an inbuilt application programming interface of class ClientRequest within the HTTP module which is used to get the object of client request protocol.

Syntax:

const request.protocol

Parameters: This function does not accept any argument as a parameter.

Return Value: This method returns the object of the client request protocol.

Example 1: Filename-index.js



Javascript




// Node.js program to demonstrate the  
// request.protocol method
  
// Importing http module
const http = require('http');
  
// Create an HTTP server
const server = http.createServer((req, res) => {
  res.writeHead(200, { 'Content-Type': 'text/plain' });
  res.end('okay');
});
  
// Now that server is running
server.listen(3000, '127.0.0.1', () => {
  
  // Make a request
  const options = {
    port: 3000,
    host: '127.0.0.1',
    headers: {
      'Connection': 'Upgrade',
      'Upgrade': 'websocket'
    }
  };
  
  // Getting client request
  const req = http.request(options);
  
  req.protocol = 'HTTP'
  
  // Getting protocol
  // by using protocol method
  const v = req.protocol;
  
  // Display the result
  console.log("protocol :- " + v)
  
  process.exit(0)
});

Run the index.js file using the following command:

node index.js

Output:

protocol :- HTTP

Example 2: Filename-index.js

Javascript




// Node.js program to demonstrate the  
// request.protocol method
  
// Importing http module
const http = require('http');
  
// Create an HTTP server
http.createServer((req, res) => { })
  .listen(3000, '127.0.0.1', () => {
  
  // Getting cleint request
  const req = http.request({
    port: 3000,
    host: '127.0.0.1',
  });
  
  // Getting protocol
  // by using protocol method
  console.log("protocol :- " + req.protocol)
  
  process.exit(0)
});

Run the index.js file using the following command:

node index.js

Output:

protocol :- undefined

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

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