peerflix-engine

peerflix-engine

The streaming torrent engine that peerflix uses

npm install peerflix-engine

How can I help?

• Open issues on things that are broken
• Fix open issues by sending PRs
• Add documentation

Usage

peerflix-engine is a node module that allows you to access files inside a torrent as node streams.

var peerflixEngine = require('peerflix-engine');
var fs = require('fs');

var engine = peerflixEngine(fs.readFileSync('my-test-file.torrent'));

engine.files.forEach(function(file) {
	console.log('filename:', file.name);
	var stream = file.createReadStream();
	// stream is readable stream to containing the file content
});

You can pass start and end options to stream to slice the file

// get a stream containing bytes 10-100 inclusive.
var stream = file.createReadStream({
	start: 10,
	end: 100
});

Per default no files are downloaded unless you create a stream to them. If you want to fetch a file anyway use the file.select and file.deselect method.

When you start peerflix-engine it will connect to the torrent dht and fetch pieces according to the streams you create.

Full API

engine = peerflixEngine(opts)

Create a new engine instance. Options can contain the following

{
	connections: 100,      // Max amount of peers to be connected to.
	path: '/tmp/my-file', // Where to save the buffer data.
	dht: true             // Whether or to use the dht to find peers.
	                      // Defaults to true
}

engine.verify(cb)

Verify the currently saved data before starting the swarm. You should call this as the first method if you want to persist data.

engine.files[...]

An array of all files in the torrent. See the file section for more info on what methods the file has

engine.destroy(cb)

Destroy the engine (including the saved data) completely. The callback is optional

engine.listen([port], cb)

Listen for incoming peers on the specified port. Port defaults to 6881

engine.swarm

The attached peer-wire-swarm instance

file = engine.files[...]

A file in the torrent. They contains the following data

{
	name: 'my-filename.txt',
	path: 'my-folder/my-filename.txt',
	length: 424242
}

file.select()

Selects the file to be downloaded, but at a lower priority than streams. Useful if you know you need the file at a later stage.

file.deselect()

Deselects the file which means it won't be downloaded unless someone creates a stream to it

stream = file.createReadStream(opts)

Create a readable stream to the file. Pieces needed by the stream will be prioritized highly. Options can contain the following

{
	start: startByte,
	end: endByte
}

Both start and end are inclusive

License

MIT