https://github.com/webtorrent/torrent-piece

Torrent piece abstraction
https://github.com/webtorrent/torrent-piece

bittorrent browser javascript nodejs piece torrent webtorrent

Last synced: 9 days ago
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Torrent piece abstraction

• Host: GitHub
• URL: https://github.com/webtorrent/torrent-piece
• Owner: webtorrent
• License: mit
• Created: 2015-08-19T13:54:52.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2024-10-26T16:31:36.000Z (13 days ago)
• Last Synced: 2024-10-30T00:27:31.328Z (10 days ago)
• Topics: bittorrent, browser, javascript, nodejs, piece, torrent, webtorrent
• Language: JavaScript
• Homepage: https://webtorrent.io
• Size: 875 KB
• Stars: 23
• Watchers: 5
• Forks: 9
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• awesome-peer-to-peer - torrent-piece

README

        
# torrent-piece [![ci][ci-image]][ci-url] [![npm][npm-image]][npm-url] [![downloads][downloads-image]][downloads-url] [![javascript style guide][standard-image]][standard-url]

[ci-image]: https://img.shields.io/github/workflow/status/webtorrent/torrent-piece/ci/master

[ci-url]: https://github.com/webtorrent/torrent-piece/actions

[npm-image]: https://img.shields.io/npm/v/torrent-piece.svg

[npm-url]: https://npmjs.org/package/torrent-piece

[downloads-image]: https://img.shields.io/npm/dm/torrent-piece.svg

[downloads-url]: https://npmjs.org/package/torrent-piece

[standard-image]: https://img.shields.io/badge/code_style-standard-brightgreen.svg

[standard-url]: https://standardjs.com

### Torrent piece abstraction

[![Sauce Test Status](https://saucelabs.com/browser-matrix/torrent-piece.svg)](https://saucelabs.com/u/torrent-piece)

Also works in the browser with [browserify](http://browserify.org/)! This module is used by [WebTorrent](http://webtorrent.io) and [torrent-stream](https://npmjs.com/package/torrent-stream).

## install

```

npm install torrent-piece

```

## usage

```js

import Piece from 'torrent-piece'

Piece.BLOCK_LENGTH // 16384

const pieceLength = Piece.BLOCK_LENGTH * 5

const piece = new Piece(pieceLength)

piece.missing // 81920

piece.reserve() // 0

piece.set(0, someBuffer0)

piece.reserve() // 1

piece.reserve() // 2

piece.reserve() // 3

piece.set(1, someBuffer1)

piece.set(2, someBuffer2)

piece.set(3, someBuffer3)

piece.reserve() // 4

piece.cancel(4) // cancel the reservation of a chunk

piece.reserve() // 4 (given out again)

piece.set(4, someBuffer4)

// handy functions

piece.chunkLength(0) // 16384

piece.chunkOffset(0) // 0

// eventually, when no more chunks left...

piece.reserve() // -1 (signal that all chunks are reserved)

piece.missing // 0

const pieceBuffer = piece.flush()

console.log(pieceBuffer)

```

## license

MIT. Copyright (c) [Feross Aboukhadijeh](https://feross.org) and [WebTorrent, LLC](https://webtorrent.io).