webtorrent/webtorrent
Webtorrent
WebTorrent is a JavaScript client library and peer-to-peer file sharing tool that implements the BitTorrent protocol. It enables the seeding and downloading of files via magnet links and info hashes across both the browser and Node.js environments.
The project distinguishes itself by using WebRTC data channels to establish direct browser-to-browser networking, allowing decentralized data transfer across different domains without a central server. It specifically focuses on streaming torrent media, enabling incremental video and audio playback by prioritizing sequential pieces of a file before the full download completes.
The library covers a broad range of capabilities including peer discovery through distributed hash tables and trackers, torrent integrity verification, and selective file downloading. It also provides tools for managing network traffic, such as bandwidth limiting and the ability to expose torrent content as HTTP streams to support range requests.
Features
- Torrent Streaming - Enables real-time playback of video and audio files from a torrent before the full download completes.
- Peer-to-Peer File Sharing - Implements decentralized file sharing using WebRTC data channels for direct browser-to-browser transfer.
- Torrent Data Downloading - Provides the core capability to fetch files from a P2P network using magnet links or info hashes.
- Incremental Media Playback - Supports playing video or audio files incrementally, allowing playback to start before the full download completes.
- Peer-to-Peer Streaming - Streams video and audio data directly from a torrent into a media player during download.
- Media Streaming - Downloads torrent pieces in sequential order to support real-time media streaming.
- BitTorrent Implementations - Implements the BitTorrent protocol to facilitate peer discovery via DHT and trackers.
- Decentralized Content Distribution - Provides decentralized distribution of files by creating torrents and seeding data to a swarm.
- Magnet Link Resolution - Resolves torrent metadata and connects to peers using URIs that identify torrents by their hash.
- Torrent Management Tools - Enables sharing local files or buffers by creating a torrent and making data available to the swarm.
- File Streaming Utilities - Enables reading file data through streams while prioritizing required pieces in the swarm.
- Sequential Piece Prioritization - Prioritizes the download of file pieces in sequential order to enable incremental media playback.
- Connectivity Establishment - Establishes direct peer-to-peer links using WebRTC data channels and standard network protocols across different domains.
- Peer-to-Peer Networking - Uses remote trackers to exchange peer lists and bootstrap swarm connections.
- Peer Discovery - Implements Distributed Hash Table (DHT) discovery to locate peers without a central tracker.
- P2P Client Libraries - Provides a JavaScript library for streaming and sharing torrents in both browser and Node.js environments.
- Data Integrity Verification - Scans storage to verify piece hashes and update the bitfield for files added externally.
- Bitfields - Implements bitfield-based state tracking to coordinate data piece availability between peers.
- Range Request Servers - Creates a local server that translates HTTP range requests into torrent piece requests from the swarm.
- Download Prioritizations - Allows marking specific file ranges as high priority to enable incremental playback and critical data retrieval.
- Peer List Exchange - Implements peer list exchange to accelerate the discovery of other participants within a torrent swarm.
- Selective Downloaders - Allows downloading only specific file indices from a multi-file torrent via magnet URI parameters.
- Traffic Rate Limiters - Provides the ability to cap maximum download and upload rates in bytes per second to manage bandwidth.
- Integrity Verification - Performs manual verification of downloaded file pieces to ensure data integrity and prevent corruption.
- Transfer Monitoring Tools - Tracks real-time upload and download speeds and overall completion progress for active transfers.
- Real-Time Data Streaming - Utilizes Node.js and Web streams to pipe peer data for real-time processing.
- Distributed Systems - Streaming torrent client for web and Node.js.
- Location Services - BitTorrent protocol implementation over WebRTC.
