Node JS Tutorial - Chaining the Streams

In this tutorial, we will learn about chaining streams in Node.js. Chaining is a mechanism that allows us to connect the output of one stream to another stream, creating a chain of multiple stream operations.

Chaining is commonly used in conjunction with piping operations to perform complex data processing tasks. Let's take a closer look at how chaining works.

Chaining Example: Compressing a File

Go to the project and open the index.js file. First, require the fs and zlib packages:

Var fs = require('fs');  
var zlib = require('zlib'); 

fs.createReadStream(message.txt ') 
   .pipe(zlib.createGzip()) 
   .pipe(fs.createWriteStream('message.txt.gz')); 
console.log("File created and Compressed."); 

This code will create a file named message.txt and then compress it. Let's run the code and see the result.

Go to the command prompt and execute the index.js file:

node index.js

As a result, you will see that a new file named message.txt.gz has been created. This file is the compressed version of the original message.txt file.

If you decompress the message.txt.gz file, you will see the original message.txt file. This demonstrates how chaining streams can be used to perform complex data processing tasks in Node.js.

In this way, you can use chaining to connect multiple stream operations and efficiently process data in Node.js.