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/*
* noVNC: HTML5 VNC client
* Copyright (C) 2012 Joel Martin
* Licensed under MPL 2.0 (see LICENSE.txt)
*/
import RFB from '../core/rfb.js';
import * as Log from '../core/util/logging.js';
import Base64 from '../core/base64.js';
// Immediate polyfill
if (window.setImmediate === undefined) {
let _immediateIdCounter = 1;
const _immediateFuncs = {};
window.setImmediate = (func) => {
const index = _immediateIdCounter++;
_immediateFuncs[index] = func;
window.postMessage("noVNC immediate trigger:" + index, "*");
return index;
};
window.clearImmediate = (id) => {
_immediateFuncs[id];
};
window.addEventListener("message", (event) => {
if ((typeof event.data !== "string") ||
(event.data.indexOf("noVNC immediate trigger:") !== 0)) {
return;
}
const index = event.data.slice("noVNC immediate trigger:".length);
const callback = _immediateFuncs[index];
if (callback === undefined) {
return;
}
delete _immediateFuncs[index];
callback();
});
}
export default class RecordingPlayer {
constructor(frames, encoding, disconnected) {
this._frames = frames;
this._encoding = encoding;
this._disconnected = disconnected;
if (this._encoding === undefined) {
const frame = this._frames[0];
const start = frame.indexOf('{', 1) + 1;
if (frame.slice(start).startsWith('UkZC')) {
this._encoding = 'base64';
} else {
this._encoding = 'binary';
}
}
this._rfb = undefined;
this._frame_length = this._frames.length;
this._frame_index = 0;
this._start_time = undefined;
this._realtime = true;
this._trafficManagement = true;
this._running = false;
this.onfinish = () => {};
}
run(realtime, trafficManagement) {
// initialize a new RFB
this._rfb = new RFB(document.getElementById('VNC_screen'), 'wss://test');
this._rfb.viewOnly = true;
this._rfb.addEventListener("disconnect",
this._handleDisconnect.bind(this));
this._rfb.addEventListener("credentialsrequired",
this._handleCredentials.bind(this));
this._enablePlaybackMode();
// reset the frame index and timer
this._frame_index = 0;
this._start_time = (new Date()).getTime();
this._realtime = realtime;
this._trafficManagement = (trafficManagement === undefined) ? !realtime : trafficManagement;
this._running = true;
}
// _enablePlaybackMode mocks out things not required for running playback
_enablePlaybackMode() {
const self = this;
this._rfb._sock.send = () => {};
this._rfb._sock.close = () => {};
this._rfb._sock.flush = () => {};
this._rfb._sock.open = function () {
this.init();
this._eventHandlers.open();
self._queueNextPacket();
};
}
_queueNextPacket() {
if (!this._running) { return; }
let frame = this._frames[this._frame_index];
// skip send frames
while (this._frame_index < this._frame_length && frame.charAt(0) === "}") {
this._frame_index++;
frame = this._frames[this._frame_index];
}
if (frame === 'EOF') {
Log.Debug('Finished, found EOF');
this._finish();
return;
}
if (this._frame_index >= this._frame_length) {
Log.Debug('Finished, no more frames');
this._finish();
return;
}
if (this._realtime) {
const foffset = frame.slice(1, frame.indexOf('{', 1));
const toffset = (new Date()).getTime() - this._start_time;
let delay = foffset - toffset;
if (delay < 1) delay = 1;
setTimeout(this._doPacket.bind(this), delay);
} else {
setImmediate(this._doPacket.bind(this));
}
}
_doPacket() {
// Avoid having excessive queue buildup in non-realtime mode
if (this._trafficManagement && this._rfb._flushing) {
const orig = this._rfb._display.onflush;
this._rfb._display.onflush = () => {
this._rfb._display.onflush = orig;
this._rfb._onFlush();
this._doPacket();
};
return;
}
const frame = this._frames[this._frame_index];
let start = frame.indexOf('{', 1) + 1;
let u8;
if (this._encoding === 'base64') {
u8 = Base64.decode(frame.slice(start));
start = 0;
} else {
u8 = new Uint8Array(frame.length - start);
for (let i = 0; i < frame.length - start; i++) {
u8[i] = frame.charCodeAt(start + i);
}
}
this._rfb._sock._recv_message({'data': u8});
this._frame_index++;
this._queueNextPacket();
}
_finish() {
if (this._rfb._display.pending()) {
this._rfb._display.onflush = () => {
if (this._rfb._flushing) {
this._rfb._onFlush();
}
this._finish();
};
this._rfb._display.flush();
} else {
this._running = false;
this._rfb._sock._eventHandlers.close({code: 1000, reason: ""});
delete this._rfb;
this.onfinish((new Date()).getTime() - this._start_time);
}
}
_handleDisconnect(evt) {
this._running = false;
this._disconnected(evt.detail.clean, this._frame_index);
}
_handleCredentials(evt) {
this._rfb.sendCredentials({"username": "Foo",
"password": "Bar",
"target": "Baz"});
}
}
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