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pumpify

Combine an array of streams into a single duplex stream using pump and duplexify


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What is pumpify?

The pumpify npm package is a module that combines an array of streams into a single duplex stream using pump and duplexify. It handles the piping between streams for you, and destroys all streams if one of them closes. This is particularly useful when you want to work with multiple streams in a sequential manner, ensuring that data is properly piped through each stage and that resources are cleaned up if an error occurs.

What are pumpify's main functionalities?

Combining streams into a single duplex stream

This code sample demonstrates how to create a single duplex stream that reads from a file, compresses the data using gzip, and then writes the compressed data to a new file. The pumpify module handles the piping and stream destruction.

const pumpify = require('pumpify');
const fs = require('fs');
const zlib = require('zlib');
const stream = pumpify(fs.createReadStream('input.txt'), zlib.createGzip(), fs.createWriteStream('output.txt.gz'));

Error handling across piped streams

This code sample shows how to handle errors in a pipeline created with pumpify. If any of the streams in the pipeline emit an error, pumpify will destroy all streams and emit the error on the resulting duplex stream.

const pumpify = require('pumpify');
const fs = require('fs');
const zlib = require('zlib');
const stream = pumpify(fs.createReadStream('input.txt'), zlib.createGzip(), fs.createWriteStream('output.txt.gz'));
stream.on('error', err => console.error('Stream error:', err));

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Package last updated on 01 Oct 2019

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