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duplexify

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duplexify

Turn a writable and readable stream into a streams2 duplex stream with support for async initialization and streams1/streams2 input

  • 4.1.3
  • latest
  • Source
  • npm
  • Socket score

Version published
Weekly downloads
15M
decreased by-14.37%
Maintainers
1
Weekly downloads
 
Created

What is duplexify?

The duplexify npm package allows you to turn a writable and readable stream into a single duplex stream. This can be useful when you need to present a single stream interface while having separate underlying sources for the readable and writable sides.

What are duplexify's main functionalities?

Creating a duplex stream from separate readable and writable streams

This feature allows you to combine a readable stream and a writable stream into a duplex stream, which can be both read from and written to.

const duplexify = require('duplexify');
const fs = require('fs');

const readable = fs.createReadStream('source.txt');
const writable = fs.createWriteStream('destination.txt');
const duplexStream = duplexify(writable, readable);

// Now you can read from and write to duplexStream as if it were a single stream.

Dynamically setting the readable or writable part of the duplex stream

This feature allows you to dynamically set or swap out the readable and writable components of the duplex stream after it has been created.

const duplexify = require('duplexify');
const duplexStream = duplexify();

duplexStream.setReadable(readableStream);
duplexStream.setWritable(writableStream);

Handling errors and closing the stream properly

This feature demonstrates how to handle errors and the closing of the duplex stream, ensuring that resources are cleaned up properly.

const duplexify = require('duplexify');
const duplexStream = duplexify(writable, readable);

duplexStream.on('error', (err) => {
  console.error('Stream error:', err);
});

duplexStream.on('finish', () => {
  console.log('Writable stream finished writing.');
});

duplexStream.on('end', () => {
  console.log('Readable stream finished reading.');
});

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Package last updated on 06 Mar 2024

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