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skylink.debug.js
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skylink.debug.js
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/*! skylinkjs - v0.6.14 - Wed Sep 07 2016 17:47:49 GMT+0800 (SGT) */
(function() {
'use strict';
/**
* Polyfill for Object.keys() from Mozilla
* From https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/keys
*/
if (!Object.keys) {
Object.keys = (function() {
var hasOwnProperty = Object.prototype.hasOwnProperty,
hasDontEnumBug = !({
toString: null
}).propertyIsEnumerable('toString'),
dontEnums = [
'toString',
'toLocaleString',
'valueOf',
'hasOwnProperty',
'isPrototypeOf',
'propertyIsEnumerable',
'constructor'
],
dontEnumsLength = dontEnums.length;
return function(obj) {
if (typeof obj !== 'object' && typeof obj !== 'function' || obj === null) throw new TypeError('Object.keys called on non-object');
var result = [];
for (var prop in obj) {
if (hasOwnProperty.call(obj, prop)) result.push(prop);
}
if (hasDontEnumBug) {
for (var i = 0; i < dontEnumsLength; i++) {
if (hasOwnProperty.call(obj, dontEnums[i])) result.push(dontEnums[i]);
}
}
return result;
}
})()
}
/**
* Polyfill for Date.getISOString() from Mozilla
* From https://developer.mozilla.org/en/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString
*/
(function() {
function pad(number) {
if (number < 10) {
return '0' + number;
}
return number;
}
Date.prototype.toISOString = function() {
return this.getUTCFullYear() +
'-' + pad(this.getUTCMonth() + 1) +
'-' + pad(this.getUTCDate()) +
'T' + pad(this.getUTCHours()) +
':' + pad(this.getUTCMinutes()) +
':' + pad(this.getUTCSeconds()) +
'.' + (this.getUTCMilliseconds() / 1000).toFixed(3).slice(2, 5) +
'Z';
};
})();
/**
* Polyfill for addEventListener() from Eirik Backer @eirikbacker (github.com).
* From https://gist.github.com/eirikbacker/2864711
* MIT Licensed
*/
(function(win, doc){
if(win.addEventListener) return; //No need to polyfill
function docHijack(p){var old = doc[p];doc[p] = function(v){ return addListen(old(v)) }}
function addEvent(on, fn, self){
return (self = this).attachEvent('on' + on, function(e){
var e = e || win.event;
e.preventDefault = e.preventDefault || function(){e.returnValue = false}
e.stopPropagation = e.stopPropagation || function(){e.cancelBubble = true}
fn.call(self, e);
});
}
function addListen(obj, i){
if(i = obj.length)while(i--)obj[i].addEventListener = addEvent;
else obj.addEventListener = addEvent;
return obj;
}
addListen([doc, win]);
if('Element' in win)win.Element.prototype.addEventListener = addEvent; //IE8
else{ //IE < 8
doc.attachEvent('onreadystatechange', function(){addListen(doc.all)}); //Make sure we also init at domReady
docHijack('getElementsByTagName');
docHijack('getElementById');
docHijack('createElement');
addListen(doc.all);
}
})(window, document);
/**
* Global function that clones an object.
*/
var clone = function (obj) {
if (obj === null || typeof obj !== 'object') {
return obj;
}
var copy = obj.constructor();
for (var attr in obj) {
if (obj.hasOwnProperty(attr)) {
copy[attr] = obj[attr];
}
}
return copy;
};
/**
* <h2>Prerequisites on using Skylink</h2>
* Before using any Skylink functionalities, you will need to authenticate your App Key using
* the <a href="#method_init">`init()` method</a>.
*
* To manage or create App Keys, you may access the [Skylink Developer Portal here](https://console.temasys.io).
*
* To view the list of supported browsers, visit [the list here](
* https://github.com/Temasys/SkylinkJS#supported-browsers).
*
* Here are some articles to help you get started:
* - [How to setup a simple video call](https://temasys.com.sg/getting-started-with-webrtc-and-skylinkjs/)
* - [How to setup screensharing](https://temasys.com.sg/screensharing-with-skylinkjs/)
* - [How to create a chatroom like feature](https://temasys.com.sg/building-a-simple-peer-to-peer-webrtc-chat/)
*
* Here are some demos you may use to aid your development:
* - Getaroom.io [[Demo](https://getaroom.io) / [Source code](https://github.com/Temasys/getaroom)]
* - Creating a component [[Link](https://github.com/Temasys/skylink-call-button)]
*
* You may see the example below in the <a href="#">Constructor tab</a> to have a general idea how event subscription
* and the ordering of <a href="#method_init"><code>init()</code></a> and
* <a href="#method_joinRoom"><code>joinRoom()</code></a> methods should be called.
*
* If you have any issues, you may find answers to your questions in the FAQ section on [our support portal](
* http://support.temasys.com.sg), asks questions, request features or raise bug tickets as well.
*
* If you would like to contribute to our SkylinkJS codebase, see [the contributing README](
* https://github.com/Temasys/SkylinkJS/blob/master/CONTRIBUTING.md).
*
* [See License (Apache 2.0)](https://github.com/Temasys/SkylinkJS/blob/master/LICENSE)
*
* @class Skylink
* @constructor
* @example
* // Here's a simple example on how you can start using Skylink.
* var skylinkDemo = new Skylink();
*
* // Subscribe all events first as a general guideline
* skylinkDemo.on("incomingStream", function (peerId, stream, peerInfo, isSelf) {
* if (isSelf) {
* attachMediaStream(document.getElementById("selfVideo"), stream);
* } else {
* var peerVideo = document.createElement("video");
* peerVideo.id = peerId;
* peerVideo.autoplay = "autoplay";
* document.getElementById("peersVideo").appendChild(peerVideo);
* attachMediaStream(peerVideo, stream);
* }
* });
*
* skylinkDemo.on("peerLeft", function (peerId, peerInfo, isSelf) {
* if (!isSelf) {
* var peerVideo = document.getElementById(peerId);
* // do a check if peerVideo exists first
* if (peerVideo) {
* document.getElementById("peersVideo").removeChild(peerVideo);
* } else {
* console.error("Peer video for " + peerId + " is not found.");
* }
* }
* });
*
* // init() should always be called first before other methods other than event methods like on() or off().
* skylinkDemo.init("YOUR_APP_KEY_HERE", function (error, success) {
* if (success) {
* skylinkDemo.joinRoom("my_room", {
* userData: "My Username",
* audio: true,
* video: true
* });
* }
* });
* @for Skylink
* @since 0.5.0
*/
function Skylink() {
if (!(this instanceof Skylink)) {
return new Skylink();
}
}
/**
* Contains the current version of Skylink Web SDK.
* @attribute VERSION
* @type String
* @readOnly
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype.VERSION = '0.6.14';
/**
* Function that generates an <a href="https://en.wikipedia.org/wiki/Universally_unique_identifier">UUID</a> (Unique ID).
* @method generateUUID
* @return {String} Returns a generated UUID (Unique ID).
* @for Skylink
* @since 0.5.9
*/
Skylink.prototype.generateUUID = function() {
var d = new Date().getTime();
var uuid = 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
var r = (d + Math.random() * 16) % 16 | 0;
d = Math.floor(d / 16);
return (c == 'x' ? r : (r & 0x7 | 0x8)).toString(16);
});
return uuid;
};
Skylink.prototype.DATA_CHANNEL_STATE = {
CONNECTING: 'connecting',
OPEN: 'open',
CLOSING: 'closing',
CLOSED: 'closed',
ERROR: 'error'
};
/**
* The list of Datachannel types.
* @attribute DATA_CHANNEL_TYPE
* @param {String} MESSAGING <small>Value <code>"messaging"</code></small>
* The value of the Datachannel type that is used only for messaging in
* <a href="#method_sendP2PMessage"><code>sendP2PMessage()</code> method</a>.
* <small>However for Peers that do not support simultaneous data transfers, this Datachannel
* type will be used to do data transfers (1 at a time).</small>
* <small>Each Peer connections will only have one of this Datachannel type and the
* connection will only close when the Peer connection is closed.</small>
* @param {String} DATA <small>Value <code>"data"</code></small>
* The value of the Datachannel type that is used only for a data transfer in
* <a href="#method_sendURLData"><code>sendURLData()</code> method</a> and
* <a href="#method_sendBlobData"><code>sendBlobData()</code> method</a>.
* <small>The connection will close after the data transfer has been completed or terminated.</small>
* @type JSON
* @readOnly
* @for Skylink
* @since 0.6.1
*/
Skylink.prototype.DATA_CHANNEL_TYPE = {
MESSAGING: 'messaging',
DATA: 'data'
};
/**
* Stores the flag if Peers should have any Datachannel connections.
* @attribute _enableDataChannel
* @default true
* @type Boolean
* @private
* @for Skylink
* @since 0.3.0
*/
Skylink.prototype._enableDataChannel = true;
/**
* Stores the list of Peer Datachannel connections.
* @attribute _dataChannels
* @param {JSON} (#peerId) The list of Datachannels associated with Peer ID.
* @param {RTCDataChannel} (#peerId).<#channelLabel> The Datachannel connection.
* The property name <code>"main"</code> is reserved for messaging Datachannel type.
* @type JSON
* @private
* @for Skylink
* @since 0.2.0
*/
Skylink.prototype._dataChannels = {};
/**
* Function that starts a Datachannel connection with Peer.
* @method _createDataChannel
* @private
* @for Skylink
* @since 0.5.5
*/
Skylink.prototype._createDataChannel = function(peerId, channelType, dc, customChannelName) {
var self = this;
if (typeof dc === 'string') {
customChannelName = dc;
dc = null;
}
if (!customChannelName) {
log.error([peerId, 'RTCDataChannel', null, 'Aborting of creating Datachannel as no ' +
'channel name is provided for channel. Aborting of creating Datachannel'], {
channelType: channelType
});
return;
}
var channelName = (dc) ? dc.label : customChannelName;
var pc = self._peerConnections[peerId];
var SctpSupported =
!(window.webrtcDetectedBrowser === 'chrome' && window.webrtcDetectedVersion < 30 ||
window.webrtcDetectedBrowser === 'opera' && window.webrtcDetectedVersion < 20 );
if (!SctpSupported) {
log.warn([peerId, 'RTCDataChannel', channelName, 'SCTP not supported'], {
channelType: channelType
});
return;
}
var dcHasOpened = function () {
log.log([peerId, 'RTCDataChannel', channelName, 'Datachannel state ->'], {
readyState: 'open',
channelType: channelType
});
self._trigger('dataChannelState', self.DATA_CHANNEL_STATE.OPEN,
peerId, null, channelName, channelType);
};
if (!dc) {
try {
dc = pc.createDataChannel(channelName);
if (dc.readyState === self.DATA_CHANNEL_STATE.OPEN) {
// the datachannel was not defined in array before it was triggered
// set a timeout to allow the dc objec to be returned before triggering "open"
setTimeout(dcHasOpened, 500);
} else {
self._trigger('dataChannelState', dc.readyState, peerId, null,
channelName, channelType);
self._wait(function () {
log.log([peerId, 'RTCDataChannel', dc.label, 'Firing callback. ' +
'Datachannel state has opened ->'], dc.readyState);
dcHasOpened();
}, function () {
return dc.readyState === self.DATA_CHANNEL_STATE.OPEN;
});
}
log.debug([peerId, 'RTCDataChannel', channelName, 'Datachannel RTC object is created'], {
readyState: dc.readyState,
channelType: channelType
});
} catch (error) {
log.error([peerId, 'RTCDataChannel', channelName, 'Exception occurred in datachannel:'], {
channelType: channelType,
error: error
});
self._trigger('dataChannelState', self.DATA_CHANNEL_STATE.ERROR, peerId, error,
channelName, channelType);
return;
}
} else {
if (dc.readyState === self.DATA_CHANNEL_STATE.OPEN) {
// the datachannel was not defined in array before it was triggered
// set a timeout to allow the dc objec to be returned before triggering "open"
setTimeout(dcHasOpened, 500);
} else {
dc.onopen = dcHasOpened;
}
}
log.log([peerId, 'RTCDataChannel', channelName, 'Binary type support ->'], {
binaryType: dc.binaryType,
readyState: dc.readyState,
channelType: channelType
});
dc.dcType = channelType;
dc.onerror = function(error) {
log.error([peerId, 'RTCDataChannel', channelName, 'Exception occurred in datachannel:'], {
channelType: channelType,
readyState: dc.readyState,
error: error
});
self._trigger('dataChannelState', self.DATA_CHANNEL_STATE.ERROR, peerId, error,
channelName, channelType);
};
dc.onclose = function() {
log.debug([peerId, 'RTCDataChannel', channelName, 'Datachannel state ->'], {
readyState: 'closed',
channelType: channelType
});
dc.hasFiredClosed = true;
// give it some time to set the variable before actually closing and checking.
setTimeout(function () {
// redefine pc
pc = self._peerConnections[peerId];
// if closes because of firefox, reopen it again
// if it is closed because of a restart, ignore
var checkIfChannelClosedDuringConn = !!pc ? !pc.dataChannelClosed : false;
if (checkIfChannelClosedDuringConn && dc.dcType === self.DATA_CHANNEL_TYPE.MESSAGING) {
log.debug([peerId, 'RTCDataChannel', channelName, 'Re-opening closed datachannel in ' +
'on-going connection'], {
channelType: channelType,
readyState: dc.readyState,
isClosedDuringConnection: checkIfChannelClosedDuringConn
});
self._dataChannels[peerId].main =
self._createDataChannel(peerId, self.DATA_CHANNEL_TYPE.MESSAGING, null, peerId);
log.debug([peerId, 'RTCDataChannel', channelName, 'Re-opened closed datachannel'], {
channelType: channelType,
readyState: dc.readyState,
isClosedDuringConnection: checkIfChannelClosedDuringConn
});
} else {
self._closeDataChannel(peerId, channelName);
self._trigger('dataChannelState', self.DATA_CHANNEL_STATE.CLOSED, peerId, null,
channelName, channelType);
log.debug([peerId, 'RTCDataChannel', channelName, 'Datachannel has closed'], {
channelType: channelType,
readyState: dc.readyState,
isClosedDuringConnection: checkIfChannelClosedDuringConn
});
}
}, 100);
};
dc.onmessage = function(event) {
self._dataChannelProtocolHandler(event.data, peerId, channelName, channelType);
};
return dc;
};
/**
* Function that sends data over the Datachannel connection.
* @method _sendDataChannelMessage
* @private
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._sendDataChannelMessage = function(peerId, data, channelKey) {
var self = this;
var channelName;
if (!channelKey || channelKey === peerId) {
channelKey = 'main';
}
var dcList = self._dataChannels[peerId] || {};
var dc = dcList[channelKey];
if (!dc) {
log.error([peerId, 'RTCDataChannel', channelKey + '|' + channelName,
'Datachannel connection to peer does not exist'], {
enabledState: self._enableDataChannel,
dcList: dcList,
dc: dc,
type: (data.type || 'DATA'),
data: data,
channelKey: channelKey
});
return;
} else {
channelName = dc.label;
log.debug([peerId, 'RTCDataChannel', channelKey + '|' + channelName,
'Sending data using this channel key'], data);
if (dc.readyState === this.DATA_CHANNEL_STATE.OPEN) {
var dataString = (typeof data === 'object') ? JSON.stringify(data) : data;
log.debug([peerId, 'RTCDataChannel', channelKey + '|' + dc.label,
'Sending to peer ->'], {
readyState: dc.readyState,
type: (data.type || 'DATA'),
data: data
});
dc.send(dataString);
} else {
log.error([peerId, 'RTCDataChannel', channelKey + '|' + dc.label,
'Datachannel is not opened'], {
readyState: dc.readyState,
type: (data.type || 'DATA'),
data: data
});
this._trigger('dataChannelState', this.DATA_CHANNEL_STATE.ERROR,
peerId, 'Datachannel is not ready.\nState is: ' + dc.readyState);
}
}
};
/**
* Function that stops the Datachannel connection and removes object references.
* @method _closeDataChannel
* @private
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype._closeDataChannel = function(peerId, channelName) {
var self = this;
var dcList = self._dataChannels[peerId] || {};
var dcKeysList = Object.keys(dcList);
if (channelName) {
dcKeysList = [channelName];
}
for (var i = 0; i < dcKeysList.length; i++) {
var channelKey = dcKeysList[i];
var dc = dcList[channelKey];
if (dc) {
if (dc.readyState !== self.DATA_CHANNEL_STATE.CLOSED) {
log.log([peerId, 'RTCDataChannel', channelKey + '|' + dc.label,
'Closing datachannel']);
dc.close();
} else {
if (!dc.hasFiredClosed && window.webrtcDetectedBrowser === 'firefox') {
log.log([peerId, 'RTCDataChannel', channelKey + '|' + dc.label,
'Closed Firefox datachannel']);
self._trigger('dataChannelState', self.DATA_CHANNEL_STATE.CLOSED, peerId,
null, channelName, channelKey === 'main' ? self.DATA_CHANNEL_TYPE.MESSAGING :
self.DATA_CHANNEL_TYPE.DATA);
}
}
delete self._dataChannels[peerId][channelKey];
log.log([peerId, 'RTCDataChannel', channelKey + '|' + dc.label,
'Sucessfully removed datachannel']);
} else {
log.log([peerId, 'RTCDataChannel', channelKey + '|' + channelName,
'Unable to close Datachannel as it does not exists'], {
dc: dc,
dcList: dcList
});
}
}
};
Skylink.prototype.DATA_TRANSFER_DATA_TYPE = {
BINARY_STRING: 'binaryString',
ARRAY_BUFFER: 'arrayBuffer',
BLOB: 'blob'
};
/**
* Stores the data chunk size for Blob transfers.
* @attribute _CHUNK_FILE_SIZE
* @type Number
* @private
* @readOnly
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._CHUNK_FILE_SIZE = 49152;
/**
* Stores the data chunk size for Blob transfers transferring from/to
* Firefox browsers due to limitation tested in the past in some PCs (linx predominatly).
* @attribute _MOZ_CHUNK_FILE_SIZE
* @type Number
* @private
* @readOnly
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._MOZ_CHUNK_FILE_SIZE = 12288;
/**
* Stores the data chunk size for data URI string transfers.
* @attribute _CHUNK_DATAURL_SIZE
* @type Number
* @private
* @readOnly
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._CHUNK_DATAURL_SIZE = 1212;
/**
* Function that converts Base64 string into Blob object.
* This is referenced from devnull69@stackoverflow.com #6850276.
* @method _base64ToBlob
* @private
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype._base64ToBlob = function(dataURL) {
var byteString = atob(dataURL.replace(/\s\r\n/g, ''));
// write the bytes of the string to an ArrayBuffer
var ab = new ArrayBuffer(byteString.length);
var ia = new Uint8Array(ab);
for (var j = 0; j < byteString.length; j++) {
ia[j] = byteString.charCodeAt(j);
}
// write the ArrayBuffer to a blob, and you're done
return new Blob([ab]);
};
/**
* Function that converts a Blob object into Base64 string.
* @method _blobToBase64
* @private
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype._blobToBase64 = function(data, callback) {
var fileReader = new FileReader();
fileReader.onload = function() {
// Load Blob as dataurl base64 string
var base64BinaryString = fileReader.result.split(',')[1];
callback(base64BinaryString);
};
fileReader.readAsDataURL(data);
};
/**
* Function that chunks Blob object based on the data chunk size provided.
* If provided Blob object size is lesser than or equals to the chunk size, it should return an array
* of length of <code>1</code>.
* @method _chunkBlobData
* @private
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._chunkBlobData = function(blob, chunkSize) {
var chunksArray = [];
var startCount = 0;
var endCount = 0;
var blobByteSize = blob.size;
if (blobByteSize > chunkSize) {
// File Size greater than Chunk size
while ((blobByteSize - 1) > endCount) {
endCount = startCount + chunkSize;
chunksArray.push(blob.slice(startCount, endCount));
startCount += chunkSize;
}
if ((blobByteSize - (startCount + 1)) > 0) {
chunksArray.push(blob.slice(startCount, blobByteSize - 1));
}
} else {
// File Size below Chunk size
chunksArray.push(blob);
}
return chunksArray;
};
/**
* Function that chunks large string into string chunks based on the data chunk size provided.
* If provided string length is lesser than or equals to the chunk size, it should return an array
* of length of <code>1</code>.
* @method _chunkDataURL
* @private
* @for Skylink
* @since 0.6.1
*/
Skylink.prototype._chunkDataURL = function(dataURL, chunkSize) {
var outputStr = dataURL; //encodeURIComponent(dataURL);
var dataURLArray = [];
var startCount = 0;
var endCount = 0;
var dataByteSize = dataURL.size || dataURL.length;
if (dataByteSize > chunkSize) {
// File Size greater than Chunk size
while ((dataByteSize - 1) > endCount) {
endCount = startCount + chunkSize;
dataURLArray.push(outputStr.slice(startCount, endCount));
startCount += chunkSize;
}
if ((dataByteSize - (startCount + 1)) > 0) {
chunksArray.push(outputStr.slice(startCount, dataByteSize - 1));
}
} else {
// File Size below Chunk size
dataURLArray.push(outputStr);
}
return dataURLArray;
};
/**
* Function that assembles the data string chunks into a large string.
* @method _assembleDataURL
* @private
* @for Skylink
* @since 0.6.1
*/
Skylink.prototype._assembleDataURL = function(dataURLArray) {
var outputStr = '';
for (var i = 0; i < dataURLArray.length; i++) {
try {
outputStr += dataURLArray[i];
} catch (error) {
console.error('Malformed', i, dataURLArray[i]);
}
}
return outputStr;
};
Skylink.prototype.DT_PROTOCOL_VERSION = '0.1.0';
/**
* The list of data transfers directions.
* @attribute DATA_TRANSFER_TYPE
* @param {String} UPLOAD <small>Value <code>"upload"</code></small>
* The value of the data transfer direction when User is uploading data to Peer.
* @param {String} DOWNLOAD <small>Value <code>"download"</code></small>
* The value of the data transfer direction when User is downloading data from Peer.
* @type JSON
* @readOnly
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype.DATA_TRANSFER_TYPE = {
UPLOAD: 'upload',
DOWNLOAD: 'download'
};
/**
* The list of data transfers session types.
* @attribute DATA_TRANSFER_SESSION_TYPE
* @param {String} BLOB <small>Value <code>"blob"</code></small>
* The value of the session type for
* <a href="#method_sendURLData"><code>sendURLData()</code> method</a> data transfer.
* @param {String} DATA_URL <small>Value <code>"dataURL"</code></small>
* The value of the session type for
* <a href="#method_sendBlobData"><code>method_sendBlobData()</code> method</a> data transfer.
* @type JSON
* @readOnly
* @for Skylink
* @since 0.1.0
*/
Skylink.prototype.DATA_TRANSFER_SESSION_TYPE = {
BLOB: 'blob',
DATA_URL: 'dataURL'
};
/**
* The list of data transfer states.
* @attribute DATA_TRANSFER_STATE
* @param {String} UPLOAD_REQUEST <small>Value <code>"request"</code></small>
* The value of the state when receiving an upload data transfer request from Peer to User.
* <small>At this stage, the upload data transfer request from Peer may be accepted or rejected with the
* <a href="#method_acceptDataTransfer"><code>acceptDataTransfer()</code> method</a>.</small>
* @param {String} UPLOAD_STARTED <small>Value <code>"uploadStarted"</code></small>
* The value of the state when the data transfer request has been accepted
* and data transfer will start uploading data to Peer.
* <small>At this stage, the data transfer may be terminated with the
* <a href="#method_cancelDataTransfer"><code>cancelDataTransfer()</code> method</a>.</small>
* @param {String} DOWNLOAD_STARTED <small>Value <code>"downloadStarted"</code></small>
* The value of the state when the data transfer request has been accepted
* and data transfer will start downloading data from Peer.
* <small>At this stage, the data transfer may be terminated with the
* <a href="#method_cancelDataTransfer"><code>cancelDataTransfer()</code> method</a>.</small>
* @param {String} REJECTED <small>Value <code>"rejected"</code></small>
* The value of the state when upload data transfer request to Peer has been rejected and terminated.
* @param {String} UPLOADING <small>Value <code>"uploading"</code></small>
* The value of the state when data transfer is uploading data to Peer.
* @param {String} DOWNLOADING <small>Value <code>"downloading"</code></small>
* The value of the state when data transfer is downloading data from Peer.
* @param {String} UPLOAD_COMPLETED <small>Value <code>"uploadCompleted"</code></small>
* The value of the state when data transfer has uploaded successfully to Peer.
* @param {String} DOWNLOAD_COMPLETED <small>Value <code>"downloadCompleted"</code></small>
* The value of the state when data transfer has downloaded successfully from Peer.
* @param {String} CANCEL <small>Value <code>"cancel"</code></small>
* The value of the state when data transfer has been terminated from / to Peer.
* @param {String} ERROR <small>Value <code>"error"</code></small>
* The value of the state when data transfer has errors and has been terminated.
* @type JSON
* @readOnly
* @for Skylink
* @since 0.4.0
*/
Skylink.prototype.DATA_TRANSFER_STATE = {
UPLOAD_REQUEST: 'request',
UPLOAD_STARTED: 'uploadStarted',
DOWNLOAD_STARTED: 'downloadStarted',
REJECTED: 'rejected',
CANCEL: 'cancel',
ERROR: 'error',
UPLOADING: 'uploading',
DOWNLOADING: 'downloading',
UPLOAD_COMPLETED: 'uploadCompleted',
DOWNLOAD_COMPLETED: 'downloadCompleted'
};
/**
* Stores the fixed delimiter that concats the Datachannel label and actual transfer ID.
* @attribute _TRANSFER_DELIMITER
* @type String
* @readOnly
* @private
* @for Skylink
* @since 0.5.10
*/
Skylink.prototype._TRANSFER_DELIMITER = '_skylink__';
/**
* Stores the list of data transfer protocols.
* @attribute _DC_PROTOCOL_TYPE
* @param {String} WRQ The protocol to initiate data transfer.
* @param {String} ACK The protocol to request for data transfer chunk.
* Give <code>-1</code> to reject the request at the beginning and <code>0</code> to accept
* the data transfer request.
* @param {String} CANCEL The protocol to terminate data transfer.
* @param {String} ERROR The protocol when data transfer has errors and has to be terminated.
* @param {String} MESSAGE The protocol that is used to send P2P messages.
* @type JSON
* @readOnly
* @private
* @for Skylink
* @since 0.5.2
*/
Skylink.prototype._DC_PROTOCOL_TYPE = {
WRQ: 'WRQ',
ACK: 'ACK',
ERROR: 'ERROR',
CANCEL: 'CANCEL',
MESSAGE: 'MESSAGE'
};
/**
* Stores the list of types of SDKs that do not support simultaneous data transfers.
* @attribute _INTEROP_MULTI_TRANSFERS
* @type Array
* @readOnly
* @private
* @for Skylink
* @since 0.6.1
*/
Skylink.prototype._INTEROP_MULTI_TRANSFERS = ['Android', 'iOS'];
/**
* Stores the list of uploading data transfers chunks to Peers.
* @attribute _uploadDataTransfers
* @param {Array} <#transferId> The uploading data transfer chunks.
* @type JSON
* @private
* @for Skylink
* @since 0.4.1
*/
Skylink.prototype._uploadDataTransfers = {};
/**
* Stores the list of uploading data transfer sessions to Peers.
* @attribute _uploadDataSessions
* @param {JSON} <#transferId> The uploading data transfer session.
* @type JSON
* @private
* @for Skylink
* @since 0.4.1
*/
Skylink.prototype._uploadDataSessions = {};
/**
* Stores the list of downloading data transfers chunks to Peers.
* @attribute _downloadDataTransfers
* @param {Array} <#transferId> The downloading data transfer chunks.
* @type JSON
* @private
* @for Skylink
* @since 0.4.1
*/
Skylink.prototype._downloadDataTransfers = {};
/**
* Stores the list of downloading data transfer sessions to Peers.
* @attribute _downloadDataSessions
* @param {JSON} <#transferId> The downloading data transfer session.
* @type JSON
* @private
* @for Skylink
* @since 0.4.1
*/
Skylink.prototype._downloadDataSessions = {};
/**
* Stores the list of data transfer "wait-for-response" timeouts.
* @attribute _dataTransfersTimeout
* @param {Object} <#transferId> The data transfer session "wait-for-response" timeout.
* @type JSON
* @private
* @for Skylink
* @since 0.4.1
*/
Skylink.prototype._dataTransfersTimeout = {};
/**
* <blockquote class="info">
* Note that Android and iOS SDKs do not support simultaneous data transfers.
* </blockquote>
* Function that starts an uploading data transfer from User to Peers.
* @method sendBlobData
* @param {Blob} data The Blob object.
* @param {Number} [timeout=60] The timeout to wait for response from Peer.
* @param {String|Array} [targetPeerId] The target Peer ID to start data transfer with.
* - When provided as an Array, it will start uploading data transfers with all connections
* with all the Peer IDs provided.
* - When not provided, it will start uploading data transfers with all the currently connected Peers in the Room.
* @param {Function} [callback] The callback function fired when request has completed.
* <small>Function parameters signature is <code>function (error, success)</code></small>
* <small>Function request completion is determined by the <a href="#event_dataTransferState">
* <code>dataTransferState</code> event</a> triggering <code>state</code> parameter payload
* as <code>UPLOAD_COMPLETED</code> for all Peers targeted for request success.</small>
* @param {JSON} callback.error The error result in request.
* <small>Defined as <code>null</code> when there are no errors in request</small>
* @param {String} callback.error.transferId <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.error.transferInfo.transferId</code> instead.
* </blockquote> The data transfer ID.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {String} callback.error.state <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <a href="#event_dataTransferState"><code>dataTransferState</code>
* event</a> instead. </blockquote> The data transfer state that resulted in error.
* <small>Defined only for single targeted Peer data transfer.</small> [Rel: Skylink.DATA_TRANSFER_STATE]
* @param {String} callback.error.peerId <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.error.listOfPeers</code> instead.
* </blockquote> The targeted Peer ID for data transfer.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {Boolean} callback.error.isPrivate <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.error.transferInfo.isPrivate</code> instead.
* </blockquote> The flag if data transfer is targeted or not, basing
* off the <code>targetPeerId</code> parameter being defined.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {Error|String} callback.error.error <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.error.transferErrors</code> instead.
* </blockquote> The error received that resulted in error.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {Array} callback.error.listOfPeers The list Peer IDs targeted for the data transfer.
* @param {JSON} callback.error.transferErrors The list of data transfer errors.
* @param {Error|String} callback.error.transferErrors.#peerId The data transfer error associated
* with the Peer ID defined in <code>#peerId</code> property.
* <small>If <code>#peerId</code> value is <code>"self"</code>, it means that it is the error when there
* are no Peer connections to start data transfer with.</small>
* @param {JSON} callback.error.transferInfo The data transfer information.
* <small>Object signature matches the <code>transferInfo</code> parameter payload received in the
* <a href="#event_dataTransferState"><code>dataTransferState</code> event</a>.</small>
* @param {JSON} callback.success The success result in request.
* <small>Defined as <code>null</code> when there are errors in request</small>
* @param {String} callback.success.transferId <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.success.transferInfo.transferId</code> instead.
* </blockquote> The data transfer ID.
* @param {String} callback.success.state <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <a href="#event_dataTransferState"><code>dataTransferState</code>
* event</a> instead. </blockquote> The data transfer state that resulted in error.
* <small>Defined only for single targeted Peer data transfer.</small> [Rel: Skylink.DATA_TRANSFER_STATE]
* @param {String} callback.success.peerId <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.success.listOfPeers</code> instead.
* </blockquote> The targeted Peer ID for data transfer.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {Boolean} callback.success.isPrivate <blockquote class="info">
* <b>Deprecation Warning!</b> This property has been deprecated.
* Please use <code>callback.success.transferInfo.isPrivate</code> instead.
* </blockquote> The flag if data transfer is targeted or not, basing
* off the <code>targetPeerId</code> parameter being defined.
* <small>Defined only for single targeted Peer data transfer.</small>
* @param {Array} callback.success.listOfPeers The list Peer IDs targeted for the data transfer.
* @param {JSON} callback.success.transferInfo The data transfer information.
* <small>Object signature matches the <code>transferInfo</code> parameter payload received in the
* <a href="#event_dataTransferState"><code>dataTransferState</code> event</a>.</small>
* @trigger <ol class="desc-seq">
* <li>When Peer supports simultaneous data transfers, <ol>
* <li><a href="#event_dataChannelState"><code>dataChannelState</code> event</a> triggers parameter payload
* <code>state</code> as <code>CONNECTING</code> and <code>channelType</code> as <code>DATA</code>.</li>
* <li><a href="#event_dataChannelState"><code>dataChannelState</code> event</a> triggers parameter payload
* <code>state</code> as <code>OPEN</code> and <code>channelType</code> as <code>DATA</code>.</li></ol>
* <small>For Peers that do not support simultaneous data transfers, the
* <a href="#event_dataChannelState"><code>dataChannelState</code> event</a> must trigger parameter payload
* <code>state</code> as <code>OPEN</code> and <code>channelType</code> as <code>MESSAGING</code>.</small></li>
* <li><a href="#event_incomingDataRequest"><code>incomingDataRequest</code> event</a> triggers parameter payload
* <code>isSelf</code> value as <code>true</code>.</li>
* <li>When Peers accepts the uploading data transfer request from User <ol>