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Node.js http.ServerResponse.writeProcessing() Method
  • Last Updated : 05 Jan, 2021

The httpServerResponse.writeProcessing() is an inbuilt application programming interface of class ServerResponse within the HTTP module which is used to send an HTTP/1.1 102 Processing message to the client.

Syntax:

response.writeProcessing()

Parameters: This method does not accept any arguments as a parameter.

Return Value: This method has nothing to return.

Example 1: Filename-index.js



Javascript




// Node.js program to demonstrate the  
// response.writeProcessing() method
  
// Importing http module 
var http = require('http');
  
// Setting up PORT 
const PORT = process.env.PORT || 3000;
  
// Creating http Server 
var httpServer = http.createServer(
    function (request, response) {
  
    // Sending a HTTP/1.1 102 Processing message
    // by using socket method
    response.writeProcessing();
  
    // Display result
    // by using end() method
    response.end("HTTP/1.1 102 Processing message"
    + " has been sent", '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:

Server is running at port 3000...
displaying the result...
server is closed

Now run http://localhost:3000/ in the browser and you will see the following output on screen:

HTTP/1.1 102 Processing message has been sent

Example 2: Filename-index.js

Javascript




// Node.js program to demonstrate the  
// response.writeProcessing() method
  
// Importing http module 
var http = require('http');
  
// Request and response handler 
const http2Handlers = (request, response) => {
  
    // Sending a HTTP/1.1 102 Processing message
    // by using socket method
    response.writeProcessing();
  
    // Display result
    // by using end() method
    response.end("HTTP/1.1 102 Processing message"
    + " has been sent", 'utf8', () => {
            console.log("displaying the result...");
  
            httpServer.close(() => {
                console.log("server is closed")
            })
        });
};
  
// Creating http Server 
var 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...
displaying the result...
server is closed

Now run http://localhost:3000/ in the browser and you will see the following output on screen:

HTTP/1.1 102 Processing message has been sent

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

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