Introduction to Node.js Streams

Introduction to Streams

In Node.js, a stream is an abstract interface for handling streaming data. Streams are a way to handle large amounts of data in a continuous flow.

Step 1: Create a Readable Stream

Create a readable stream using the fs module.

const fs = require('fs');
const readableStream = fs.createReadStream('largefile.txt');

Step 2: Create a Writable Stream

Create a writable stream using the fs module.

const writableStream = fs.createWriteStream('output.txt');

Step 3: Pipe the Streams

Pipe the readable stream to the writable stream.

readableStream.pipe(writableStream);

Step 4: Handle Stream Events

Handle stream events, such as data and end.

readableStream.on('data', (chunk) => {
  console.log(`Received ${chunk.length} bytes of data`);
});
readableStream.on('end', () => {
  console.log('End of stream');
});

Step 5: Run the Code

Run the code to see the streams in action.

node streams.js

This will create a new file called output.txt with the contents of largefile.txt.