878 lines
29 KiB
JavaScript
878 lines
29 KiB
JavaScript
window.URL = window.URL || window.webkitURL;
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window.isRtcSupported = !!(window.RTCPeerConnection || window.mozRTCPeerConnection || window.webkitRTCPeerConnection);
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if (!window.isRtcSupported) alert("WebRTC must be enabled for PairDrop to work");
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class ServerConnection {
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constructor() {
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this._connect();
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Events.on('pagehide', _ => this._disconnect());
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document.addEventListener('visibilitychange', _ => this._onVisibilityChange());
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if (navigator.connection) navigator.connection.addEventListener('change', _ => this._reconnect());
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Events.on('room-secrets', e => this._sendRoomSecrets(e.detail));
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Events.on('room-secret-deleted', e => this.send({ type: 'room-secret-deleted', roomSecret: e.detail}));
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Events.on('room-secrets-cleared', e => this.send({ type: 'room-secrets-cleared', roomSecrets: e.detail}));
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Events.on('resend-peers', _ => this.send({ type: 'resend-peers'}));
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Events.on('pair-device-initiate', _ => this._onPairDeviceInitiate());
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Events.on('pair-device-join', e => this._onPairDeviceJoin(e.detail));
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Events.on('pair-device-cancel', _ => this.send({ type: 'pair-device-cancel' }));
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Events.on('offline', _ => clearTimeout(this._reconnectTimer));
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Events.on('online', _ => this._connect());
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}
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async _connect() {
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clearTimeout(this._reconnectTimer);
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if (this._isConnected() || this._isConnecting()) return;
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const ws = new WebSocket(await this._endpoint());
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ws.binaryType = 'arraybuffer';
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ws.onopen = _ => this._onOpen();
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ws.onmessage = e => this._onMessage(e.data);
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ws.onclose = _ => this._onDisconnect();
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ws.onerror = e => this._onError(e);
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this._socket = ws;
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}
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_onOpen() {
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console.log('WS: server connected');
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Events.fire('ws-connected');
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}
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_sendRoomSecrets(roomSecrets) {
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this.send({ type: 'room-secrets', roomSecrets: roomSecrets });
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}
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_onPairDeviceInitiate() {
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if (!this._isConnected()) {
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Events.fire('notify-user', 'You need to be online to pair devices.');
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return;
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}
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this.send({ type: 'pair-device-initiate' })
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}
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_onPairDeviceJoin(roomKey) {
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if (!this._isConnected()) {
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setTimeout(_ => this._onPairDeviceJoin(roomKey), 5000);
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return;
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}
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this.send({ type: 'pair-device-join', roomKey: roomKey })
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}
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_onMessage(msg) {
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msg = JSON.parse(msg);
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if (msg.type !== 'ping') console.log('WS:', msg);
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switch (msg.type) {
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case 'peers':
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Events.fire('peers', msg);
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break;
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case 'peer-joined':
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Events.fire('peer-joined', msg);
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break;
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case 'peer-left':
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Events.fire('peer-left', msg);
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break;
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case 'signal':
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Events.fire('signal', msg);
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break;
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case 'ping':
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this.send({ type: 'pong' });
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break;
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case 'display-name':
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this._onDisplayName(msg);
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break;
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case 'pair-device-initiated':
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Events.fire('pair-device-initiated', msg);
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break;
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case 'pair-device-joined':
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Events.fire('pair-device-joined', msg);
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break;
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case 'pair-device-join-key-invalid':
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Events.fire('pair-device-join-key-invalid');
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break;
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case 'pair-device-canceled':
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Events.fire('pair-device-canceled', msg.roomKey);
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break;
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case 'pair-device-join-key-rate-limit':
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Events.fire('notify-user', 'Rate limit reached. Wait 10 seconds and try again.');
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break;
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case 'secret-room-deleted':
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Events.fire('secret-room-deleted', msg.roomSecret);
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break;
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default:
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console.error('WS: unknown message type', msg);
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}
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}
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send(msg) {
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if (!this._isConnected()) return;
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this._socket.send(JSON.stringify(msg));
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}
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_onDisplayName(msg) {
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sessionStorage.setItem("peerId", msg.message.peerId);
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PersistentStorage.get('peerId').then(peerId => {
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if (!peerId) {
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// save peerId to indexedDB to retrieve after PWA is installed
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PersistentStorage.set('peerId', msg.message.peerId).then(peerId => {
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console.log(`peerId saved to indexedDB: ${peerId}`);
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});
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}
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}).catch(_ => _ => PersistentStorage.logBrowserNotCapable())
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Events.fire('display-name', msg);
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}
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async _endpoint() {
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// hack to detect if deployment or development environment
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const protocol = location.protocol.startsWith('https') ? 'wss' : 'ws';
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const webrtc = window.isRtcSupported ? '/webrtc' : '/fallback';
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let ws_url = new URL(protocol + '://' + location.host + location.pathname + 'server' + webrtc);
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const peerId = await this._peerId();
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if (peerId) ws_url.searchParams.append('peer_id', peerId)
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return ws_url.toString();
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}
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async _peerId() {
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// make peerId persistent when pwa is installed
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return window.matchMedia('(display-mode: minimal-ui)').matches
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? await PersistentStorage.get('peerId')
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: sessionStorage.getItem("peerId");
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}
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_disconnect() {
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this.send({ type: 'disconnect' });
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if (this._socket) {
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this._socket.onclose = null;
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this._socket.close();
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this._socket = null;
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Events.fire('ws-disconnected');
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}
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}
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_onDisconnect() {
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console.log('WS: server disconnected');
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Events.fire('notify-user', 'No server connection. Retry in 5s...');
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clearTimeout(this._reconnectTimer);
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this._reconnectTimer = setTimeout(_ => this._connect(), 5000);
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Events.fire('ws-disconnected');
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}
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_onVisibilityChange() {
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if (document.hidden) return;
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this._connect();
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}
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_isConnected() {
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return this._socket && this._socket.readyState === this._socket.OPEN;
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}
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_isConnecting() {
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return this._socket && this._socket.readyState === this._socket.CONNECTING;
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}
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_onError(e) {
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console.error(e);
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}
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_reconnect() {
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this._disconnect();
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this._connect();
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}
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}
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class Peer {
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constructor(serverConnection, peerId, roomType, roomSecret) {
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this._server = serverConnection;
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this._peerId = peerId;
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this._roomType = roomType;
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this._roomSecret = roomSecret;
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this._filesQueue = [];
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this._busy = false;
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}
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sendJSON(message) {
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this._send(JSON.stringify(message));
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}
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async createHeader(file) {
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return {
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name: file.name,
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mime: file.type,
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size: file.size,
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};
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}
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getResizedImageDataUrl(file, width = undefined, height = undefined, quality = 0.7) {
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return new Promise((resolve, reject) => {
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let image = new Image();
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image.src = URL.createObjectURL(file);
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image.onload = _ => {
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let imageWidth = image.width;
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let imageHeight = image.height;
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let canvas = document.createElement('canvas');
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// resize the canvas and draw the image data into it
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if (width && height) {
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canvas.width = width;
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canvas.height = height;
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} else if (width) {
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canvas.width = width;
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canvas.height = Math.floor(imageHeight * width / imageWidth)
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} else if (height) {
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canvas.width = Math.floor(imageWidth * height / imageHeight);
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canvas.height = height;
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} else {
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canvas.width = imageWidth;
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canvas.height = imageHeight
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}
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var ctx = canvas.getContext("2d");
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ctx.drawImage(image, 0, 0, canvas.width, canvas.height);
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let dataUrl = canvas.toDataURL("image/jpeg", quality);
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resolve(dataUrl);
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}
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image.onerror = _ => reject(`Could not create an image thumbnail from type ${file.type}`);
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}).then(dataUrl => {
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return dataUrl;
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}).catch(e => console.error(e));
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}
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async requestFileTransfer(files) {
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let header = [];
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let totalSize = 0;
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let imagesOnly = true
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for (let i=0; i<files.length; i++) {
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Events.fire('set-progress', {peerId: this._peerId, progress: 0.8*i/files.length, status: 'prepare'})
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header.push(await this.createHeader(files[i]));
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totalSize += files[i].size;
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if (files[i].type.split('/')[0] !== 'image') imagesOnly = false;
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}
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Events.fire('set-progress', {peerId: this._peerId, progress: 0.8, status: 'prepare'})
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let dataUrl = '';
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if (files[0].type.split('/')[0] === 'image') {
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dataUrl = await this.getResizedImageDataUrl(files[0], 400, null, 0.9);
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}
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Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'prepare'})
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this._filesRequested = files;
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this.sendJSON({type: 'request',
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header: header,
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totalSize: totalSize,
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imagesOnly: imagesOnly,
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thumbnailDataUrl: dataUrl
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});
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Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'wait'})
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}
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async sendFiles() {
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for (let i=0; i<this._filesRequested.length; i++) {
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this._filesQueue.push(this._filesRequested[i]);
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}
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this._filesRequested = null
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if (this._busy) return;
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this._dequeueFile();
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}
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_dequeueFile() {
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this._busy = true;
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const file = this._filesQueue.shift();
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this._sendFile(file);
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}
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async _sendFile(file) {
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this.sendJSON({
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type: 'header',
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size: file.size,
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name: file.name,
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mime: file.type
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});
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this._chunker = new FileChunker(file,
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chunk => this._send(chunk),
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offset => this._onPartitionEnd(offset));
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this._chunker.nextPartition();
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}
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_onPartitionEnd(offset) {
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this.sendJSON({ type: 'partition', offset: offset });
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}
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_onReceivedPartitionEnd(offset) {
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this.sendJSON({ type: 'partition-received', offset: offset });
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}
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_sendNextPartition() {
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if (!this._chunker || this._chunker.isFileEnd()) return;
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this._chunker.nextPartition();
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}
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_sendProgress(progress) {
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this.sendJSON({ type: 'progress', progress: progress });
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}
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_onMessage(message) {
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if (typeof message !== 'string') {
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this._onChunkReceived(message);
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return;
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}
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message = JSON.parse(message);
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switch (message.type) {
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case 'request':
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this._onFilesTransferRequest(message);
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break;
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case 'header':
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this._onFilesHeader(message);
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break;
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case 'partition':
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this._onReceivedPartitionEnd(message);
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break;
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case 'partition-received':
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this._sendNextPartition();
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break;
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case 'progress':
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this._onDownloadProgress(message.progress);
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break;
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case 'files-transfer-response':
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this._onFileTransferRequestResponded(message);
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break;
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case 'file-transfer-complete':
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this._onFileTransferCompleted();
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break;
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case 'message-transfer-complete':
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this._onMessageTransferCompleted();
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break;
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case 'text':
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this._onTextReceived(message);
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break;
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}
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}
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_onFilesTransferRequest(request) {
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if (this._requestPending) {
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// Only accept one request at a time
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this.sendJSON({type: 'files-transfer-response', accepted: false});
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return;
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}
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if (window.iOS && request.totalSize >= 200*1024*1024) {
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// iOS Safari can only put 400MB at once to memory.
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// Request to send them in chunks of 200MB instead:
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this.sendJSON({type: 'files-transfer-response', accepted: false, reason: 'ios-memory-limit'});
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return;
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}
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this._requestPending = request;
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Events.fire('files-transfer-request', {
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request: request,
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peerId: this._peerId
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});
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}
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_respondToFileTransferRequest(accepted) {
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this.sendJSON({type: 'files-transfer-response', accepted: accepted});
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if (accepted) {
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this._requestAccepted = this._requestPending;
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this._totalBytesReceived = 0;
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this._busy = true;
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this._filesReceived = [];
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}
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this._requestPending = null;
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}
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_onFilesHeader(header) {
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if (this._requestAccepted?.header.length) {
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this._lastProgress = 0;
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this._digester = new FileDigester({size: header.size, name: header.name, mime: header.mime},
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this._requestAccepted.totalSize,
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this._totalBytesReceived,
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fileBlob => this._onFileReceived(fileBlob)
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);
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}
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}
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_abortTransfer() {
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Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'wait'});
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Events.fire('notify-user', 'Files are incorrect.');
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this._filesReceived = [];
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this._requestAccepted = null;
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this._digester = null;
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throw new Error("Received files differ from requested files. Abort!");
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}
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_onChunkReceived(chunk) {
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if(!this._digester || !(chunk.byteLength || chunk.size)) return;
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this._digester.unchunk(chunk);
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const progress = this._digester.progress;
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if (progress > 1) {
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this._abortTransfer();
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}
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this._onDownloadProgress(progress);
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// occasionally notify sender about our progress
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if (progress - this._lastProgress < 0.005 && progress !== 1) return;
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this._lastProgress = progress;
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this._sendProgress(progress);
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}
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_onDownloadProgress(progress) {
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Events.fire('set-progress', {peerId: this._peerId, progress: progress, status: 'transfer'});
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}
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async _onFileReceived(fileBlob) {
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const acceptedHeader = this._requestAccepted.header.shift();
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this._totalBytesReceived += fileBlob.size;
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this.sendJSON({type: 'file-transfer-complete'});
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const sameSize = fileBlob.size === acceptedHeader.size;
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const sameName = fileBlob.name === acceptedHeader.name
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if (!sameSize || !sameName) {
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this._abortTransfer();
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}
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this._filesReceived.push(fileBlob);
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if (!this._requestAccepted.header.length) {
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this._busy = false;
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Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'process'});
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Events.fire('files-received', {sender: this._peerId, files: this._filesReceived, imagesOnly: this._requestAccepted.imagesOnly, totalSize: this._requestAccepted.totalSize});
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this._filesReceived = [];
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this._requestAccepted = null;
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}
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}
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_onFileTransferCompleted() {
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this._chunker = null;
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if (!this._filesQueue.length) {
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this._busy = false;
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Events.fire('notify-user', 'File transfer completed.');
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} else {
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this._dequeueFile();
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}
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}
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_onFileTransferRequestResponded(message) {
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if (!message.accepted) {
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Events.fire('set-progress', {peerId: this._peerId, progress: 1, status: 'wait'});
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this._filesRequested = null;
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if (message.reason === 'ios-memory-limit') {
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Events.fire('notify-user', "Sending files to iOS is only possible up to 200MB at once");
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}
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return;
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}
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Events.fire('file-transfer-accepted');
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Events.fire('set-progress', {peerId: this._peerId, progress: 0, status: 'transfer'});
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this.sendFiles();
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}
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_onMessageTransferCompleted() {
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Events.fire('notify-user', 'Message transfer completed.');
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}
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sendText(text) {
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const unescaped = btoa(unescape(encodeURIComponent(text)));
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this.sendJSON({ type: 'text', text: unescaped });
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}
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_onTextReceived(message) {
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if (!message.text) return;
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const escaped = decodeURIComponent(escape(atob(message.text)));
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Events.fire('text-received', { text: escaped, peerId: this._peerId });
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this.sendJSON({ type: 'message-transfer-complete' });
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}
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}
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class RTCPeer extends Peer {
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constructor(serverConnection, peerId, roomType, roomSecret) {
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super(serverConnection, peerId, roomType, roomSecret);
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if (!peerId) return; // we will listen for a caller
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this._connect(peerId, true);
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}
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_connect(peerId, isCaller) {
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if (!this._conn || this._conn.signalingState === "closed") this._openConnection(peerId, isCaller);
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if (isCaller) {
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this._openChannel();
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} else {
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this._conn.ondatachannel = e => this._onChannelOpened(e);
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}
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}
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_openConnection(peerId, isCaller) {
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this._isCaller = isCaller;
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this._peerId = peerId;
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this._conn = new RTCPeerConnection(RTCPeer.config);
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this._conn.onicecandidate = e => this._onIceCandidate(e);
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this._conn.onconnectionstatechange = _ => this._onConnectionStateChange();
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this._conn.oniceconnectionstatechange = e => this._onIceConnectionStateChange(e);
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}
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_openChannel() {
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if (!this._conn) return;
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const channel = this._conn.createDataChannel('data-channel', {
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ordered: true,
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reliable: true // Obsolete. See https://developer.mozilla.org/en-US/docs/Web/API/RTCDataChannel/reliable
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});
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channel.onopen = e => this._onChannelOpened(e);
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channel.onerror = e => this._onError(e);
|
|
this._conn.createOffer().then(d => this._onDescription(d)).catch(e => this._onError(e));
|
|
}
|
|
|
|
_onDescription(description) {
|
|
// description.sdp = description.sdp.replace('b=AS:30', 'b=AS:1638400');
|
|
this._conn.setLocalDescription(description)
|
|
.then(_ => this._sendSignal({ sdp: description }))
|
|
.catch(e => this._onError(e));
|
|
}
|
|
|
|
_onIceCandidate(event) {
|
|
if (!event.candidate) return;
|
|
this._sendSignal({ ice: event.candidate });
|
|
}
|
|
|
|
onServerMessage(message) {
|
|
if (!this._conn) this._connect(message.sender.id, false);
|
|
|
|
if (message.sdp) {
|
|
this._conn.setRemoteDescription(message.sdp)
|
|
.then( _ => {
|
|
if (message.sdp.type === 'offer') {
|
|
return this._conn.createAnswer()
|
|
.then(d => this._onDescription(d));
|
|
}
|
|
})
|
|
.catch(e => this._onError(e));
|
|
} else if (message.ice) {
|
|
this._conn.addIceCandidate(new RTCIceCandidate(message.ice))
|
|
.catch(e => this._onError(e));
|
|
}
|
|
}
|
|
|
|
_onChannelOpened(event) {
|
|
console.log('RTC: channel opened with', this._peerId);
|
|
Events.fire('peer-connected', {peerId: this._peerId, connectionHash: this.getConnectionHash()});
|
|
const channel = event.channel || event.target;
|
|
channel.binaryType = 'arraybuffer';
|
|
channel.onmessage = e => this._onMessage(e.data);
|
|
channel.onclose = _ => this._onChannelClosed();
|
|
Events.on('beforeunload', e => this._onBeforeUnload(e));
|
|
Events.on('pagehide', _ => this._closeChannel());
|
|
this._channel = channel;
|
|
}
|
|
|
|
_onMessage(message) {
|
|
if (typeof message === 'string') {
|
|
message = JSON.parse(message);
|
|
console.log('RTC:', message);
|
|
}
|
|
super._onMessage(message);
|
|
}
|
|
|
|
getConnectionHash() {
|
|
const localDescriptionLines = this._conn.localDescription.sdp.split("\r\n");
|
|
const remoteDescriptionLines = this._conn.remoteDescription.sdp.split("\r\n");
|
|
let localConnectionFingerprint, remoteConnectionFingerprint;
|
|
for (let i=0; i<localDescriptionLines.length; i++) {
|
|
if (localDescriptionLines[i].startsWith("a=fingerprint:")) {
|
|
localConnectionFingerprint = localDescriptionLines[i].substring(14);
|
|
break;
|
|
}
|
|
}
|
|
for (let i=0; i<remoteDescriptionLines.length; i++) {
|
|
if (remoteDescriptionLines[i].startsWith("a=fingerprint:")) {
|
|
remoteConnectionFingerprint = remoteDescriptionLines[i].substring(14);
|
|
break;
|
|
}
|
|
}
|
|
const combinedFingerprints = this._isCaller
|
|
? localConnectionFingerprint + remoteConnectionFingerprint
|
|
: remoteConnectionFingerprint + localConnectionFingerprint;
|
|
let hash = cyrb53(combinedFingerprints).toString();
|
|
while (hash.length < 16) {
|
|
hash = "0" + hash;
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
_onBeforeUnload(e) {
|
|
if (this._busy) {
|
|
e.preventDefault();
|
|
return "There are unfinished transfers. Are you sure you want to close?";
|
|
}
|
|
}
|
|
|
|
_closeChannel() {
|
|
if (this._channel) this._channel.onclose = null;
|
|
if (this._conn) this._conn.close();
|
|
this._conn = null;
|
|
}
|
|
|
|
_onChannelClosed() {
|
|
console.log('RTC: channel closed', this._peerId);
|
|
Events.fire('peer-disconnected', this._peerId);
|
|
if (!this._isCaller) return;
|
|
this._connect(this._peerId, true); // reopen the channel
|
|
}
|
|
|
|
_onConnectionStateChange() {
|
|
console.log('RTC: state changed:', this._conn.connectionState);
|
|
switch (this._conn.connectionState) {
|
|
case 'disconnected':
|
|
this._onError('rtc connection disconnected');
|
|
break;
|
|
case 'failed':
|
|
this._onError('rtc connection failed');
|
|
break;
|
|
}
|
|
}
|
|
|
|
_onIceConnectionStateChange() {
|
|
switch (this._conn.iceConnectionState) {
|
|
case 'failed':
|
|
this._onError('ICE Gathering failed');
|
|
break;
|
|
default:
|
|
console.log('ICE Gathering', this._conn.iceConnectionState);
|
|
}
|
|
}
|
|
|
|
_onError(error) {
|
|
console.error(error);
|
|
}
|
|
|
|
_send(message) {
|
|
if (!this._channel) this.refresh();
|
|
this._channel.send(message);
|
|
}
|
|
|
|
_sendSignal(signal) {
|
|
signal.type = 'signal';
|
|
signal.to = this._peerId;
|
|
signal.roomType = this._roomType;
|
|
signal.roomSecret = this._roomSecret;
|
|
this._server.send(signal);
|
|
}
|
|
|
|
refresh() {
|
|
// check if channel is open. otherwise create one
|
|
if (this._isConnected() || this._isConnecting()) return;
|
|
this._connect(this._peerId, this._isCaller);
|
|
}
|
|
|
|
_isConnected() {
|
|
return this._channel && this._channel.readyState === 'open';
|
|
}
|
|
|
|
_isConnecting() {
|
|
return this._channel && this._channel.readyState === 'connecting';
|
|
}
|
|
}
|
|
|
|
class PeersManager {
|
|
|
|
constructor(serverConnection) {
|
|
this.peers = {};
|
|
this._server = serverConnection;
|
|
Events.on('signal', e => this._onMessage(e.detail));
|
|
Events.on('peers', e => this._onPeers(e.detail));
|
|
Events.on('files-selected', e => this._onFilesSelected(e.detail));
|
|
Events.on('respond-to-files-transfer-request', e => this._onRespondToFileTransferRequest(e.detail))
|
|
Events.on('send-text', e => this._onSendText(e.detail));
|
|
Events.on('peer-left', e => this._onPeerLeft(e.detail));
|
|
Events.on('peer-disconnected', e => this._onPeerDisconnected(e.detail));
|
|
Events.on('secret-room-deleted', e => this._onSecretRoomDeleted(e.detail));
|
|
}
|
|
|
|
_onMessage(message) {
|
|
// if different roomType -> abort
|
|
if (this.peers[message.sender.id] && this.peers[message.sender.id]._roomType !== message.roomType) return;
|
|
if (!this.peers[message.sender.id]) {
|
|
this.peers[message.sender.id] = new RTCPeer(this._server, undefined, message.roomType, message.roomSecret);
|
|
}
|
|
this.peers[message.sender.id].onServerMessage(message);
|
|
}
|
|
|
|
_onPeers(msg) {
|
|
msg.peers.forEach(peer => {
|
|
if (this.peers[peer.id]) {
|
|
// if different roomType -> abort
|
|
if (this.peers[peer.id].roomType !== msg.roomType || this.peers[peer.id].roomSecret !== msg.roomSecret) return;
|
|
this.peers[peer.id].refresh();
|
|
return;
|
|
}
|
|
this.peers[peer.id] = new RTCPeer(this._server, peer.id, msg.roomType, msg.roomSecret);
|
|
})
|
|
}
|
|
|
|
sendTo(peerId, message) {
|
|
this.peers[peerId].send(message);
|
|
}
|
|
|
|
_onRespondToFileTransferRequest(detail) {
|
|
this.peers[detail.to]._respondToFileTransferRequest(detail.accepted);
|
|
}
|
|
|
|
_onFilesSelected(message) {
|
|
let inputFiles = Array.from(message.files);
|
|
delete message.files;
|
|
let files = [];
|
|
const l = inputFiles.length;
|
|
for (let i=0; i<l; i++) {
|
|
// when filetype is empty guess via suffix
|
|
const inputFile = inputFiles.shift();
|
|
const file = inputFile.type
|
|
? inputFile
|
|
: new File([inputFile], inputFile.name, {type: mime.getMimeByFilename(inputFile.name)});
|
|
files.push(file)
|
|
}
|
|
this.peers[message.to].requestFileTransfer(files);
|
|
}
|
|
|
|
_onSendText(message) {
|
|
this.peers[message.to].sendText(message.text);
|
|
}
|
|
|
|
_onPeerLeft(msg) {
|
|
if (msg.disconnect === true) {
|
|
// if user actively disconnected from PairDrop disconnect all peer to peer connections immediately
|
|
Events.fire('peer-disconnected', msg.peerId);
|
|
}
|
|
}
|
|
|
|
_onPeerDisconnected(peerId) {
|
|
const peer = this.peers[peerId];
|
|
delete this.peers[peerId];
|
|
if (!peer || !peer._conn) return;
|
|
if (peer._channel) peer._channel.onclose = null;
|
|
peer._conn.close();
|
|
peer._busy = false;
|
|
}
|
|
|
|
_onSecretRoomDeleted(roomSecret) {
|
|
for (const peerId in this.peers) {
|
|
const peer = this.peers[peerId];
|
|
if (peer._roomSecret === roomSecret) {
|
|
this._onPeerDisconnected(peerId);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
class FileChunker {
|
|
|
|
constructor(file, onChunk, onPartitionEnd) {
|
|
this._chunkSize = 64000; // 64 KB
|
|
this._maxPartitionSize = 1e6; // 1 MB
|
|
this._offset = 0;
|
|
this._partitionSize = 0;
|
|
this._file = file;
|
|
this._onChunk = onChunk;
|
|
this._onPartitionEnd = onPartitionEnd;
|
|
this._reader = new FileReader();
|
|
this._reader.addEventListener('load', e => this._onChunkRead(e.target.result));
|
|
}
|
|
|
|
nextPartition() {
|
|
this._partitionSize = 0;
|
|
this._readChunk();
|
|
}
|
|
|
|
_readChunk() {
|
|
const chunk = this._file.slice(this._offset, this._offset + this._chunkSize);
|
|
this._reader.readAsArrayBuffer(chunk);
|
|
}
|
|
|
|
_onChunkRead(chunk) {
|
|
this._offset += chunk.byteLength;
|
|
this._partitionSize += chunk.byteLength;
|
|
this._onChunk(chunk);
|
|
if (this.isFileEnd()) return;
|
|
if (this._isPartitionEnd()) {
|
|
this._onPartitionEnd(this._offset);
|
|
return;
|
|
}
|
|
this._readChunk();
|
|
}
|
|
|
|
repeatPartition() {
|
|
this._offset -= this._partitionSize;
|
|
this.nextPartition();
|
|
}
|
|
|
|
_isPartitionEnd() {
|
|
return this._partitionSize >= this._maxPartitionSize;
|
|
}
|
|
|
|
isFileEnd() {
|
|
return this._offset >= this._file.size;
|
|
}
|
|
}
|
|
|
|
class FileDigester {
|
|
|
|
constructor(meta, totalSize, totalBytesReceived, callback) {
|
|
this._buffer = [];
|
|
this._bytesReceived = 0;
|
|
this._size = meta.size;
|
|
this._name = meta.name;
|
|
this._mime = meta.mime;
|
|
this._totalSize = totalSize;
|
|
this._totalBytesReceived = totalBytesReceived;
|
|
this._callback = callback;
|
|
}
|
|
|
|
unchunk(chunk) {
|
|
this._buffer.push(chunk);
|
|
this._bytesReceived += chunk.byteLength || chunk.size;
|
|
this.progress = (this._totalBytesReceived + this._bytesReceived) / this._totalSize;
|
|
if (isNaN(this.progress)) this.progress = 1
|
|
|
|
if (this._bytesReceived < this._size) return;
|
|
// we are done
|
|
const blob = new Blob(this._buffer)
|
|
this._buffer = null;
|
|
this._callback(new File([blob], this._name, {
|
|
type: this._mime,
|
|
lastModified: new Date().getTime()
|
|
}));
|
|
}
|
|
|
|
}
|
|
|
|
class Events {
|
|
static fire(type, detail) {
|
|
window.dispatchEvent(new CustomEvent(type, { detail: detail }));
|
|
}
|
|
|
|
static on(type, callback) {
|
|
return window.addEventListener(type, callback, false);
|
|
}
|
|
|
|
static off(type, callback) {
|
|
return window.removeEventListener(type, callback, false);
|
|
}
|
|
}
|
|
|
|
RTCPeer.config = {
|
|
'sdpSemantics': 'unified-plan',
|
|
'iceServers': [
|
|
{
|
|
urls: 'stun:stun.l.google.com:19302'
|
|
},
|
|
{
|
|
urls: 'stun:openrelay.metered.ca:80'
|
|
},
|
|
{
|
|
urls: 'turn:openrelay.metered.ca:443',
|
|
username: 'openrelayproject',
|
|
credential: 'openrelayproject',
|
|
},
|
|
]
|
|
}
|