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
// 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
// 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 client 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