379 lines
11 KiB
JavaScript
379 lines
11 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const { classes: Cc, interfaces: Ci, utils: Cu, results: Cr } = Components;
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Cu.import("resource://gre/modules/XPCOMUtils.jsm");
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Cu.import("resource://gre/modules/Services.jsm");
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// Bug 1228209 - plan to remove this eventually
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function log(aMsg) {
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//dump("-*- PresentationDataChannelSessionTransport.js : " + aMsg + "\n");
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}
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const PRESENTATIONTRANSPORT_CID = Components.ID("{dd2bbf2f-3399-4389-8f5f-d382afb8b2d6}");
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const PRESENTATIONTRANSPORT_CONTRACTID = "mozilla.org/presentation/datachanneltransport;1";
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const PRESENTATIONTRANSPORTBUILDER_CID = Components.ID("{215b2f62-46e2-4004-a3d1-6858e56c20f3}");
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const PRESENTATIONTRANSPORTBUILDER_CONTRACTID = "mozilla.org/presentation/datachanneltransportbuilder;1";
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function PresentationDataChannelDescription(aDataChannelSDP) {
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this._dataChannelSDP = JSON.stringify(aDataChannelSDP);
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}
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PresentationDataChannelDescription.prototype = {
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationChannelDescription]),
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get type() {
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return Ci.nsIPresentationChannelDescription.TYPE_DATACHANNEL;
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},
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get tcpAddress() {
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return null;
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},
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get tcpPort() {
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return null;
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},
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get dataChannelSDP() {
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return this._dataChannelSDP;
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}
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};
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function PresentationTransportBuilder() {
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log("PresentationTransportBuilder construct");
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this._isControlChannelNeeded = true;
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}
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PresentationTransportBuilder.prototype = {
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classID: PRESENTATIONTRANSPORTBUILDER_CID,
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contractID: PRESENTATIONTRANSPORTBUILDER_CONTRACTID,
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationSessionTransportBuilder,
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Ci.nsIPresentationDataChannelSessionTransportBuilder,
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Ci.nsITimerCallback]),
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buildDataChannelTransport: function(aRole, aWindow, aListener) {
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if (!aRole || !aWindow || !aListener) {
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log("buildDataChannelTransport with illegal parameters");
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throw Cr.NS_ERROR_ILLEGAL_VALUE;
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}
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if (this._window) {
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log("buildDataChannelTransport has started.");
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throw Cr.NS_ERROR_UNEXPECTED;
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}
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log("buildDataChannelTransport with role " + aRole);
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this._role = aRole;
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this._window = aWindow;
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this._listener = aListener.QueryInterface(Ci.nsIPresentationSessionTransportBuilderListener);
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// TODO bug 1227053 set iceServers from |nsIPresentationDevice|
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this._peerConnection = new this._window.RTCPeerConnection();
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// |this._listener == null| will throw since the control channel is
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// abnormally closed.
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this._peerConnection.onicecandidate = aEvent => aEvent.candidate &&
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this._listener.sendIceCandidate(JSON.stringify(aEvent.candidate));
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this._peerConnection.onnegotiationneeded = () => {
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log("onnegotiationneeded with role " + this._role);
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if (!this._peerConnection) {
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log("ignoring negotiationneeded without PeerConnection");
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return;
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}
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this._peerConnection.createOffer()
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.then(aOffer => this._peerConnection.setLocalDescription(aOffer))
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.then(() => this._listener
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.sendOffer(new PresentationDataChannelDescription(this._peerConnection.localDescription)))
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.catch(e => this._reportError(e));
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}
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switch (this._role) {
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case Ci.nsIPresentationService.ROLE_CONTROLLER:
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this._dataChannel = this._peerConnection.createDataChannel("presentationAPI");
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this._setDataChannel();
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break;
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case Ci.nsIPresentationService.ROLE_RECEIVER:
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this._peerConnection.ondatachannel = aEvent => {
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this._dataChannel = aEvent.channel;
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// Ensure the binaryType of dataChannel is blob.
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this._dataChannel.binaryType = "blob";
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this._setDataChannel();
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}
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break;
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default:
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throw Cr.NS_ERROR_ILLEGAL_VALUE;
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}
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// TODO bug 1228235 we should have a way to let device providers customize
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// the time-out duration.
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let timeout = Services.prefs.getIntPref("presentation.receiver.loading.timeout", 10000);
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// The timer is to check if the negotiation finishes on time.
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this._timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
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this._timer.initWithCallback(this, timeout, this._timer.TYPE_ONE_SHOT);
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},
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notify: function() {
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if (!this._sessionTransport) {
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this._cleanup(Cr.NS_ERROR_NET_TIMEOUT);
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}
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},
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_reportError: function(aError) {
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log("report Error " + aError.name + ":" + aError.message);
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this._cleanup(Cr.NS_ERROR_FAILURE);
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},
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_setDataChannel: function() {
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this._dataChannel.onopen = () => {
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log("data channel is open, notify the listener, role " + this._role);
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// Handoff the ownership of _peerConnection and _dataChannel to
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// _sessionTransport
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this._sessionTransport = new PresentationTransport();
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this._sessionTransport.init(this._peerConnection, this._dataChannel, this._window);
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this._peerConnection.onicecandidate = null;
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this._peerConnection.onnegotiationneeded = null;
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this._peerConnection = this._dataChannel = null;
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this._listener.onSessionTransport(this._sessionTransport);
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this._sessionTransport.callback.notifyTransportReady();
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this._cleanup(Cr.NS_OK);
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};
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this._dataChannel.onerror = aError => {
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log("data channel onerror " + aError.name + ":" + aError.message);
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this._cleanup(Cr.NS_ERROR_FAILURE);
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}
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},
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_cleanup: function(aReason) {
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if (aReason != Cr.NS_OK) {
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this._listener.onError(aReason);
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}
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if (this._dataChannel) {
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this._dataChannel.close();
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this._dataChannel = null;
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}
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if (this._peerConnection) {
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this._peerConnection.close();
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this._peerConnection = null;
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}
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this._role = null;
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this._window = null;
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this._listener = null;
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this._sessionTransport = null;
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if (this._timer) {
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this._timer.cancel();
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this._timer = null;
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}
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},
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// nsIPresentationControlChannelListener
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onOffer: function(aOffer) {
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if (this._role !== Ci.nsIPresentationService.ROLE_RECEIVER ||
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this._sessionTransport) {
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log("onOffer status error");
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this._cleanup(Cr.NS_ERROR_FAILURE);
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}
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log("onOffer: " + aOffer.dataChannelSDP + " with role " + this._role);
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let offer = new this._window
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.RTCSessionDescription(JSON.parse(aOffer.dataChannelSDP));
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this._peerConnection.setRemoteDescription(offer)
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.then(() => this._peerConnection.signalingState == "stable" ||
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this._peerConnection.createAnswer())
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.then(aAnswer => this._peerConnection.setLocalDescription(aAnswer))
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.then(() => {
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this._isControlChannelNeeded = false;
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this._listener
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.sendAnswer(new PresentationDataChannelDescription(this._peerConnection.localDescription))
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}).catch(e => this._reportError(e));
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},
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onAnswer: function(aAnswer) {
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if (this._role !== Ci.nsIPresentationService.ROLE_CONTROLLER ||
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this._sessionTransport) {
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log("onAnswer status error");
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this._cleanup(Cr.NS_ERROR_FAILURE);
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}
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log("onAnswer: " + aAnswer.dataChannelSDP + " with role " + this._role);
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let answer = new this._window
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.RTCSessionDescription(JSON.parse(aAnswer.dataChannelSDP));
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this._peerConnection.setRemoteDescription(answer).catch(e => this._reportError(e));
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this._isControlChannelNeeded = false;
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},
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onIceCandidate: function(aCandidate) {
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log("onIceCandidate: " + aCandidate + " with role " + this._role);
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if (!this._window || !this._peerConnection) {
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log("ignoring ICE candidate after connection");
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return;
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}
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let candidate = new this._window.RTCIceCandidate(JSON.parse(aCandidate));
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this._peerConnection.addIceCandidate(candidate).catch(e => this._reportError(e));
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},
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notifyDisconnected: function(aReason) {
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log("notifyDisconnected reason: " + aReason);
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if (aReason != Cr.NS_OK) {
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this._cleanup(aReason);
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} else if (this._isControlChannelNeeded) {
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this._cleanup(Cr.NS_ERROR_FAILURE);
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}
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},
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};
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function PresentationTransport() {
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this._messageQueue = [];
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this._closeReason = Cr.NS_OK;
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}
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PresentationTransport.prototype = {
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classID: PRESENTATIONTRANSPORT_CID,
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contractID: PRESENTATIONTRANSPORT_CONTRACTID,
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QueryInterface: XPCOMUtils.generateQI([Ci.nsIPresentationSessionTransport]),
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init: function(aPeerConnection, aDataChannel, aWindow) {
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log("initWithDataChannel");
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this._enableDataNotification = false;
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this._dataChannel = aDataChannel;
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this._peerConnection = aPeerConnection;
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this._window = aWindow;
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this._dataChannel.onopen = () => {
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log("data channel reopen. Should never touch here");
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};
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this._dataChannel.onclose = () => {
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log("data channel onclose");
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if (this._callback) {
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this._callback.notifyTransportClosed(this._closeReason);
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}
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this._cleanup();
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}
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this._dataChannel.onmessage = aEvent => {
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log("data channel onmessage " + aEvent.data);
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if (!this._enableDataNotification || !this._callback) {
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log("queue message");
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this._messageQueue.push(aEvent.data);
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return;
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}
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this._doNotifyData(aEvent.data);
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};
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this._dataChannel.onerror = aError => {
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log("data channel onerror " + aError.name + ":" + aError.message);
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if (this._callback) {
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this._callback.notifyTransportClosed(Cr.NS_ERROR_FAILURE);
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}
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this._cleanup();
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}
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},
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// nsIPresentationTransport
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get selfAddress() {
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throw NS_ERROR_NOT_AVAILABLE;
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},
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get callback() {
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return this._callback;
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},
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set callback(aCallback) {
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this._callback = aCallback;
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},
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send: function(aData) {
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log("send " + aData);
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this._dataChannel.send(aData);
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},
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sendBinaryMsg: function(aData) {
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log("sendBinaryMsg");
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let array = new Uint8Array(aData.length);
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for (let i = 0; i < aData.length; i++) {
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array[i] = aData.charCodeAt(i);
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}
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this._dataChannel.send(array);
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},
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sendBlob: function(aBlob) {
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log("sendBlob");
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this._dataChannel.send(aBlob);
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},
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enableDataNotification: function() {
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log("enableDataNotification");
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if (this._enableDataNotification) {
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return;
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}
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if (!this._callback) {
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throw NS_ERROR_NOT_AVAILABLE;
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}
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this._enableDataNotification = true;
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this._messageQueue.forEach(aData => this._doNotifyData(aData));
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this._messageQueue = [];
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},
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close: function(aReason) {
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this._closeReason = aReason;
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this._dataChannel.close();
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},
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_cleanup: function() {
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this._dataChannel = null;
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if (this._peerConnection) {
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this._peerConnection.close();
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this._peerConnection = null;
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}
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this._callback = null;
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this._messageQueue = [];
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this._window = null;
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},
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_doNotifyData: function(aData) {
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if (!this._callback) {
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throw NS_ERROR_NOT_AVAILABLE;
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}
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if (aData instanceof this._window.Blob) {
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let reader = new this._window.FileReader();
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reader.addEventListener("load", (aEvent) => {
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this._callback.notifyData(aEvent.target.result, true);
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});
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reader.readAsBinaryString(aData);
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} else {
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this._callback.notifyData(aData, false);
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}
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},
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};
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this.NSGetFactory = XPCOMUtils.generateNSGetFactory([PresentationTransportBuilder,
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PresentationTransport]);
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