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Move P2P tracker client to separate file.
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packages/p2p-media-loader-core/src/p2p/tracker-client.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| import TrackerClient, { | ||
| PeerConnection, | ||
| TrackerClientEvents, | ||
| } from "bittorrent-tracker"; | ||
| import { Settings, StreamWithSegments } from "../types"; | ||
| import debug from "debug"; | ||
| import * as PeerUtil from "../utils/peer"; | ||
| import * as LoggerUtils from "../utils/logger"; | ||
| import { Peer } from "./peer"; | ||
|
|
||
| type PeerItem = { | ||
| peer?: Peer; | ||
| potentialConnections: Set<PeerConnection>; | ||
| }; | ||
| type P2PTrackerClientEventHandlers = { | ||
| onPeerConnected: (peer: Peer) => void; | ||
| onSegmentRequested: (peer: Peer, segmentExternalId: string) => void; | ||
| }; | ||
|
|
||
| export class P2PTrackerClient { | ||
| private readonly client: TrackerClient; | ||
| private readonly _peers = new Map<string, PeerItem>(); | ||
| private readonly streamHash: string; | ||
|
|
||
| constructor( | ||
| private readonly peerId: string, | ||
| private readonly streamExternalId: string, | ||
| private readonly stream: StreamWithSegments, | ||
| private readonly eventHandlers: P2PTrackerClientEventHandlers, | ||
| private readonly settings: Settings, | ||
| private readonly logger: debug.Debugger | ||
| ) { | ||
| this.streamHash = PeerUtil.getStreamHash(streamExternalId); | ||
| this.client = new TrackerClient({ | ||
| infoHash: utf8ToHex(this.streamHash), | ||
| peerId: utf8ToHex(this.peerId), | ||
| port: 6881, | ||
| announce: [ | ||
| // "wss://tracker.novage.com.ua", | ||
| "wss://tracker.openwebtorrent.com", | ||
| ], | ||
| rtcConfig: { | ||
| iceServers: [ | ||
| { | ||
| urls: [ | ||
| "stun:stun.l.google.com:19302", | ||
| "stun:global.stun.twilio.com:3478", | ||
| ], | ||
| }, | ||
| ], | ||
| }, | ||
| }); | ||
| this.client.on("peer", this.onReceivePeerConnection); | ||
| this.client.on("warning", this.onTrackerClientWarning); | ||
| this.client.on("error", this.onTrackerClientError); | ||
| this.logger( | ||
| `create tracker client: ${LoggerUtils.getStreamString(stream)}; ${ | ||
| this.peerId | ||
| }` | ||
| ); | ||
| } | ||
|
|
||
| start() { | ||
| this.client.start(); | ||
| } | ||
|
|
||
| destroy() { | ||
| this.client.destroy(); | ||
| for (const { peer, potentialConnections } of this._peers.values()) { | ||
| peer?.destroy(); | ||
| for (const connection of potentialConnections) { | ||
| connection.destroy(); | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private onReceivePeerConnection: TrackerClientEvents["peer"] = ( | ||
| peerConnection | ||
| ) => { | ||
| let peerItem = this._peers.get(peerConnection.id); | ||
|
|
||
| if (peerItem?.peer) { | ||
| peerConnection.destroy(); | ||
| return; | ||
| } else if (!peerItem) { | ||
| peerItem = { potentialConnections: new Set() }; | ||
| peerItem.potentialConnections.add(peerConnection); | ||
| const itemId = Peer.getPeerIdFromHexString(peerConnection.id); | ||
| this._peers.set(itemId, peerItem); | ||
| } | ||
|
|
||
| peerConnection.on("connect", () => { | ||
| if (!peerItem) return; | ||
|
|
||
| for (const connection of peerItem.potentialConnections) { | ||
| if (connection !== peerConnection) connection.destroy(); | ||
| } | ||
| peerItem.potentialConnections.clear(); | ||
| peerItem.peer = new Peer( | ||
| peerConnection, | ||
| { | ||
| onPeerClosed: this.onPeerClosed, | ||
| onSegmentRequested: this.eventHandlers.onSegmentRequested, | ||
| }, | ||
| this.settings | ||
| ); | ||
| this.eventHandlers.onPeerConnected(peerItem.peer); | ||
| }); | ||
| }; | ||
|
|
||
| private onTrackerClientWarning: TrackerClientEvents["warning"] = ( | ||
| warning | ||
| ) => { | ||
| this.logger( | ||
| `tracker warning (${LoggerUtils.getStreamString( | ||
| this.stream | ||
| )}: ${warning})` | ||
| ); | ||
| }; | ||
|
|
||
| private onTrackerClientError: TrackerClientEvents["error"] = (error) => { | ||
| this.logger( | ||
| `tracker error (${LoggerUtils.getStreamString(this.stream)}: ${error})` | ||
| ); | ||
| }; | ||
|
|
||
| *peers() { | ||
| for (const peerItem of this._peers.values()) { | ||
| if (peerItem?.peer) yield peerItem.peer; | ||
| } | ||
| } | ||
|
|
||
| private onPeerClosed = (peer: Peer) => { | ||
| this.logger(`peer closed: ${peer.id}`); | ||
| this._peers.delete(peer.id); | ||
| }; | ||
| } | ||
|
|
||
| function utf8ToHex(utf8String: string) { | ||
| let result = ""; | ||
| for (let i = 0; i < utf8String.length; i++) { | ||
| result += utf8String.charCodeAt(i).toString(16); | ||
| } | ||
|
|
||
| return result; | ||
| } |