https://github.com/shinnn/cancelable-pipeline

Cancelable `stream.pipeline()`
https://github.com/shinnn/cancelable-pipeline

abortable cancelable cancelation javascript nodejs pipeline pump stream

Last synced: 2 months ago
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Cancelable `stream.pipeline()`

• Host: GitHub
• URL: https://github.com/shinnn/cancelable-pipeline
• Owner: shinnn
• License: isc
• Created: 2017-03-24T10:03:09.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2019-04-08T08:13:12.000Z (over 6 years ago)
• Last Synced: 2024-11-22T12:17:10.726Z (11 months ago)
• Topics: abortable, cancelable, cancelation, javascript, nodejs, pipeline, pump, stream
• Language: JavaScript
• Homepage: https://nodejs.org/api/stream.html#stream_stream_pipeline_streams_callback
• Size: 55.7 KB
• Stars: 3
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# cancelable-pipeline

[![npm version](https://img.shields.io/npm/v/cancelable-pipeline.svg)](https://www.npmjs.com/package/cancelable-pipeline)

[![Build Status](https://travis-ci.com/shinnn/cancelable-pipeline.svg?branch=master)](https://travis-ci.com/shinnn/cancelable-pipeline)

[![codecov](https://codecov.io/gh/shinnn/cancelable-pipeline/branch/master/graph/badge.svg)](https://codecov.io/gh/shinnn/cancelable-pipeline)

Cancelable [`stream.pipeline()`](https://nodejs.org/api/stream.html#stream_stream_pipeline_streams_callback)

```javascript

const {createReadStream, createWriteStream, promises: {stat}} = require('fs');

const cancelablePipeline = require('cancelable-pipeline');

cancelablePipeline(createReadStream('1GB-file.txt'), createWriteStream('dest0'), async () => {

  (await stat('dest0')).size; //=> 1000000000;

});

const cancel = cancelablePipeline(createReadStream('1GB-file.txt'), createWriteStream('dest1'), async () => {

  (await stat('dest1')).size; //=> 263192576, or something else smaller than 1000000000

});

setTimeout(() => cancel(), 1000);

```

## Installation

[Use](https://docs.npmjs.com/cli/install) [npm](https://docs.npmjs.com/about-npm/).

```

npm install cancelable-pipeline

```

## API

```javascript

const cancelablePipeline = require('cancelable-pipeline');

```

### cancelablePipeline(*stream0* [, *stream1*, *stream2*, ...] [, *callback*])

*stream0*, *stream1*, *stream2*, ...: [`Stream`](https://nodejs.org/api/stream.html#stream_stream)  

*callback*: `Function`  

Return: `Function`

### cancelablePipeline(*streams* [, *callback*])

*streams*: `Stream[]`  

*callback*: `Function`  

Return: `Function`

The API is almost the same as [`stream.pipeline()`](https://nodejs.org/api/stream.html#stream_stream_pipeline_streams_callback). The only difference is *cancelable-pipeline* returns a `Function` which destroys all the piped `Stream`s without passing any errors to the callback.

```javascript

const cancel = cancelablePipeline([src, transform, anotherTransform, dest], err => {

  err; //=> undefined

});

cancel();

```

## License

[ISC License](./LICENSE) © 2017 - 2019 Shinnosuke Watanabe