loki

The Loki Bittorrent library implements the download of magnet URIs.

The implemented DHT based on Mainline DHT. The specification can be found here Bittorrent.

    
kotlin {
    sourceSets {
        commonMain.dependencies {
            ...
            implementation("io.github.remmerw:loki:0.5.1")
        }
        ...
    }
}
    

    
    fun downloadMagnetUri(): Unit = runBlocking(Dispatchers.IO) {
        val uri = 
            "magnet:?xt=urn:btih:..." // needs a valid magnet Uri

        val magnetUri = parseMagnetUri(uri)
        
        // temp directory where to store intermediate files
        val cacheDir = SystemTemporaryDirectory 


        val storage =
            download(magnetUri, cacheDir) { torrentState: State ->
                val completePieces = torrentState.piecesComplete
                val totalPieces = torrentState.piecesTotal

                println(" pieces : $completePieces/$totalPieces")
            }

        val dataDir = Path( cacheDir, magnetUri.displayName ?: "empty")
        SystemFileSystem.createDirectories(dataDir)

        storage.storeTo(dataDir) // store files in the final directory
        storage.finish() // cleanup of intermediate files
    }