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janus.js
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/*
The MIT License (MIT)
Copyright (c) 2016 Meetecho
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included
in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
OTHER DEALINGS IN THE SOFTWARE.
*/
// List of sessions
Janus.sessions = {};
// Screensharing Chrome Extension ID
Janus.extensionId = "hapfgfdkleiggjjpfpenajgdnfckjpaj";
Janus.isExtensionEnabled = function() {
if(window.navigator.userAgent.match('Chrome')) {
var chromever = parseInt(window.navigator.userAgent.match(/Chrome\/(.*) /)[1], 10);
var maxver = 33;
if(window.navigator.userAgent.match('Linux'))
maxver = 35; // "known" crash in chrome 34 and 35 on linux
if(chromever >= 26 && chromever <= maxver) {
// Older versions of Chrome don't support this extension-based approach, so lie
return true;
}
return Janus.checkJanusExtension();
} else {
// Firefox of others, no need for the extension (but this doesn't mean it will work)
return true;
}
};
Janus.useDefaultDependencies = function (deps) {
var f = (deps && deps.fetch) || fetch;
var p = (deps && deps.Promise) || Promise;
var socketCls = (deps && deps.WebSocket) || WebSocket;
return {
newWebSocket: function(server, proto) { return new socketCls(server, proto); },
isArray: function(arr) { return Array.isArray(arr); },
checkJanusExtension: function() { return document.querySelector('#janus-extension-installed') !== null; },
webRTCAdapter: (deps && deps.adapter) || adapter,
httpAPICall: function(url, options) {
var fetchOptions = {
method: options.verb,
headers: {
'Accept': 'application/json, text/plain, */*'
},
cache: 'no-cache'
};
if(options.verb === "POST") {
fetchOptions.headers['Content-Type'] = 'application/json';
}
if(options.withCredentials !== undefined) {
fetchOptions.credentials = options.withCredentials === true ? 'include' : (options.withCredentials ? options.withCredentials : 'omit');
}
if(options.body !== undefined) {
fetchOptions.body = JSON.stringify(options.body);
}
var fetching = f(url, fetchOptions).catch(function(error) {
return p.reject({message: 'Probably a network error, is the gateway down?', error: error});
});
/*
* fetch() does not natively support timeouts.
* Work around this by starting a timeout manually, and racing it agains the fetch() to see which thing resolves first.
*/
if(options.timeout !== undefined) {
var timeout = new p(function(resolve, reject) {
var timerId = setTimeout(function() {
clearTimeout(timerId);
return reject({message: 'Request timed out', timeout: options.timeout});
}, options.timeout);
});
fetching = p.race([fetching,timeout]);
}
fetching.then(function(response) {
if(response.ok) {
if(typeof(options.success) === typeof(Janus.noop)) {
return response.json().then(function(parsed) {
options.success(parsed);
}).catch(function(error) {
return p.reject({message: 'Failed to parse response body', error: error, response: response});
});
}
}
else {
return p.reject({message: 'API call failed', response: response});
}
}).catch(function(error) {
if(typeof(options.error) === typeof(Janus.noop)) {
options.error(error.message || '<< internal error >>', error);
}
});
return fetching;
}
}
};
Janus.useOldDependencies = function (deps) {
var jq = (deps && deps.jQuery) || jQuery;
var socketCls = (deps && deps.WebSocket) || WebSocket;
return {
newWebSocket: function(server, proto) { return new socketCls(server, proto); },
isArray: function(arr) { return jq.isArray(arr); },
checkJanusExtension: function() { return jq('#janus-extension-installed').length > 0; },
webRTCAdapter: (deps && deps.adapter) || adapter,
httpAPICall: function(url, options) {
var payload = options.body !== undefined ? {
contentType: 'application/json',
data: JSON.stringify(options.body)
} : {};
var credentials = options.withCredentials !== undefined ? {xhrFields: {withCredentials: options.withCredentials}} : {};
return jq.ajax(jq.extend(payload, credentials, {
url: url,
type: options.verb,
cache: false,
dataType: 'json',
async: options.async,
timeout: options.timeout,
success: function(result) {
if(typeof(options.success) === typeof(Janus.noop)) {
options.success(result);
}
},
error: function(xhr, status, err) {
if(typeof(options.error) === typeof(Janus.noop)) {
options.error(status, err);
}
}
}));
},
};
};
Janus.noop = function() {};
// Initialization
Janus.init = function(options) {
options = options || {};
options.callback = (typeof options.callback == "function") ? options.callback : Janus.noop;
if(Janus.initDone === true) {
// Already initialized
options.callback();
} else {
if(typeof console == "undefined" || typeof console.log == "undefined")
console = { log: function() {} };
// Console logging (all debugging disabled by default)
Janus.trace = Janus.noop;
Janus.debug = Janus.noop;
Janus.vdebug = Janus.noop;
Janus.log = Janus.noop;
Janus.warn = Janus.noop;
Janus.error = Janus.noop;
if(options.debug === true || options.debug === "all") {
// Enable all debugging levels
Janus.trace = console.trace.bind(console);
Janus.debug = console.debug.bind(console);
Janus.vdebug = console.debug.bind(console);
Janus.log = console.log.bind(console);
Janus.warn = console.warn.bind(console);
Janus.error = console.error.bind(console);
} else if(Array.isArray(options.debug)) {
for(var i in options.debug) {
var d = options.debug[i];
switch(d) {
case "trace":
Janus.trace = console.trace.bind(console);
break;
case "debug":
Janus.debug = console.debug.bind(console);
break;
case "vdebug":
Janus.vdebug = console.debug.bind(console);
break;
case "log":
Janus.log = console.log.bind(console);
break;
case "warn":
Janus.warn = console.warn.bind(console);
break;
case "error":
Janus.error = console.error.bind(console);
break;
default:
console.error("Unknown debugging option '" + d + "' (supported: 'trace', 'debug', 'vdebug', 'log', warn', 'error')");
break;
}
}
}
Janus.log("Initializing library");
var usedDependencies = options.dependencies || Janus.useDefaultDependencies();
Janus.isArray = usedDependencies.isArray;
Janus.webRTCAdapter = usedDependencies.webRTCAdapter;
Janus.httpAPICall = usedDependencies.httpAPICall;
Janus.checkJanusExtension = usedDependencies.checkJanusExtension;
Janus.newWebSocket = usedDependencies.newWebSocket;
// Helper method to enumerate devices
Janus.listDevices = function(callback, config) {
callback = (typeof callback == "function") ? callback : Janus.noop;
if (config == null) config = { audio: true, video: true };
if(navigator.mediaDevices) {
navigator.mediaDevices.getUserMedia(config)
.then(function(stream) {
navigator.mediaDevices.enumerateDevices().then(function(devices) {
Janus.debug(devices);
callback(devices);
// Get rid of the now useless stream
try {
var tracks = stream.getTracks();
for(var i in tracks) {
var mst = tracks[i];
if(mst !== null && mst !== undefined)
mst.stop();
}
} catch(e) {}
});
})
.catch(function(err) {
Janus.error(err);
callback([]);
});
} else {
Janus.warn("navigator.mediaDevices unavailable");
callback([]);
}
}
// Helper methods to attach/reattach a stream to a video element (previously part of adapter.js)
Janus.attachMediaStream = function(element, stream) {
if(Janus.webRTCAdapter.browserDetails.browser === 'chrome') {
var chromever = Janus.webRTCAdapter.browserDetails.version;
if(chromever >= 43) {
element.srcObject = stream;
} else if(typeof element.src !== 'undefined') {
element.src = URL.createObjectURL(stream);
} else {
Janus.error("Error attaching stream to element");
}
} else {
element.srcObject = stream;
}
};
Janus.reattachMediaStream = function(to, from) {
if(Janus.webRTCAdapter.browserDetails.browser === 'chrome') {
var chromever = Janus.webRTCAdapter.browserDetails.version;
if(chromever >= 43) {
to.srcObject = from.srcObject;
} else if(typeof to.src !== 'undefined') {
to.src = from.src;
} else {
Janus.error("Error reattaching stream to element");
}
} else {
to.srcObject = from.srcObject;
}
};
// Detect tab close: make sure we don't loose existing onbeforeunload handlers
var oldOBF = window.onbeforeunload;
window.onbeforeunload = function() {
Janus.log("Closing window");
for(var s in Janus.sessions) {
if(Janus.sessions[s] !== null && Janus.sessions[s] !== undefined &&
Janus.sessions[s].destroyOnUnload) {
Janus.log("Destroying session " + s);
Janus.sessions[s].destroy({asyncRequest: false, notifyDestroyed: false});
}
}
if(oldOBF && typeof oldOBF == "function")
oldOBF();
}
Janus.initDone = true;
options.callback();
}
};
// Helper method to check whether WebRTC is supported by this browser
Janus.isWebrtcSupported = function() {
return window.RTCPeerConnection !== undefined && window.RTCPeerConnection !== null &&
navigator.getUserMedia !== undefined && navigator.getUserMedia !== null;
};
// Helper method to create random identifiers (e.g., transaction)
Janus.randomString = function(len) {
var charSet = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
var randomString = '';
for (var i = 0; i < len; i++) {
var randomPoz = Math.floor(Math.random() * charSet.length);
randomString += charSet.substring(randomPoz,randomPoz+1);
}
return randomString;
}
function Janus(gatewayCallbacks) {
if(Janus.initDone === undefined) {
gatewayCallbacks.error("Library not initialized");
return {};
}
if(!Janus.isWebrtcSupported()) {
gatewayCallbacks.error("WebRTC not supported by this browser");
return {};
}
Janus.log("Library initialized: " + Janus.initDone);
gatewayCallbacks = gatewayCallbacks || {};
gatewayCallbacks.success = (typeof gatewayCallbacks.success == "function") ? gatewayCallbacks.success : Janus.noop;
gatewayCallbacks.error = (typeof gatewayCallbacks.error == "function") ? gatewayCallbacks.error : Janus.noop;
gatewayCallbacks.destroyed = (typeof gatewayCallbacks.destroyed == "function") ? gatewayCallbacks.destroyed : Janus.noop;
if(gatewayCallbacks.server === null || gatewayCallbacks.server === undefined) {
gatewayCallbacks.error("Invalid gateway url");
return {};
}
var websockets = false;
var ws = null;
var wsHandlers = {};
var wsKeepaliveTimeoutId = null;
var servers = null, serversIndex = 0;
var server = gatewayCallbacks.server;
if(Janus.isArray(server)) {
Janus.log("Multiple servers provided (" + server.length + "), will use the first that works");
server = null;
servers = gatewayCallbacks.server;
Janus.debug(servers);
} else {
if(server.indexOf("ws") === 0) {
websockets = true;
Janus.log("Using WebSockets to contact Janus: " + server);
} else {
websockets = false;
Janus.log("Using REST API to contact Janus: " + server);
}
}
var iceServers = gatewayCallbacks.iceServers;
if(iceServers === undefined || iceServers === null)
iceServers = [{urls: "stun:stun.l.google.com:19302"}];
var iceTransportPolicy = gatewayCallbacks.iceTransportPolicy;
var bundlePolicy = gatewayCallbacks.bundlePolicy;
// Whether IPv6 candidates should be gathered
var ipv6Support = gatewayCallbacks.ipv6;
if(ipv6Support === undefined || ipv6Support === null)
ipv6Support = false;
// Whether we should enable the withCredentials flag for XHR requests
var withCredentials = false;
if(gatewayCallbacks.withCredentials !== undefined && gatewayCallbacks.withCredentials !== null)
withCredentials = gatewayCallbacks.withCredentials === true;
// Optional max events
var maxev = null;
if(gatewayCallbacks.max_poll_events !== undefined && gatewayCallbacks.max_poll_events !== null)
maxev = gatewayCallbacks.max_poll_events;
if(maxev < 1)
maxev = 1;
// Token to use (only if the token based authentication mechanism is enabled)
var token = null;
if(gatewayCallbacks.token !== undefined && gatewayCallbacks.token !== null)
token = gatewayCallbacks.token;
// API secret to use (only if the shared API secret is enabled)
var apisecret = null;
if(gatewayCallbacks.apisecret !== undefined && gatewayCallbacks.apisecret !== null)
apisecret = gatewayCallbacks.apisecret;
// Whether we should destroy this session when onbeforeunload is called
this.destroyOnUnload = true;
if(gatewayCallbacks.destroyOnUnload !== undefined && gatewayCallbacks.destroyOnUnload !== null)
this.destroyOnUnload = (gatewayCallbacks.destroyOnUnload === true);
var connected = false;
var sessionId = null;
var pluginHandles = {};
var that = this;
var retries = 0;
var transactions = {};
createSession(gatewayCallbacks);
// Public methods
this.getServer = function() { return server; };
this.isConnected = function() { return connected; };
this.reconnect = function(callbacks) {
callbacks = callbacks || {};
callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
callbacks["reconnect"] = true;
createSession(callbacks);
};
this.getSessionId = function() { return sessionId; };
this.destroy = function(callbacks) { destroySession(callbacks); };
this.attach = function(callbacks) { createHandle(callbacks); };
function eventHandler() {
if(sessionId == null)
return;
Janus.debug('Long poll...');
if(!connected) {
Janus.warn("Is the gateway down? (connected=false)");
return;
}
var longpoll = server + "/" + sessionId + "?rid=" + new Date().getTime();
if(maxev !== undefined && maxev !== null)
longpoll = longpoll + "&maxev=" + maxev;
if(token !== null && token !== undefined)
longpoll = longpoll + "&token=" + token;
if(apisecret !== null && apisecret !== undefined)
longpoll = longpoll + "&apisecret=" + apisecret;
Janus.httpAPICall(longpoll, {
verb: 'GET',
withCredentials: withCredentials,
success: handleEvent,
timeout: 60000, // FIXME
error: function(textStatus, errorThrown) {
Janus.error(textStatus + ":", errorThrown);
retries++;
if(retries > 3) {
// Did we just lose the gateway? :-(
connected = false;
gatewayCallbacks.error("Lost connection to the gateway (is it down?)");
return;
}
eventHandler();
}
});
}
// Private event handler: this will trigger plugin callbacks, if set
function handleEvent(json, skipTimeout) {
retries = 0;
if(!websockets && sessionId !== undefined && sessionId !== null && skipTimeout !== true)
setTimeout(eventHandler, 200);
if(!websockets && Janus.isArray(json)) {
// We got an array: it means we passed a maxev > 1, iterate on all objects
for(var i=0; i<json.length; i++) {
handleEvent(json[i], true);
}
return;
}
if(json["janus"] === "keepalive") {
// Nothing happened
Janus.vdebug("Got a keepalive on session " + sessionId);
return;
} else if(json["janus"] === "ack") {
// Just an ack, we can probably ignore
Janus.debug("Got an ack on session " + sessionId);
Janus.debug(json);
var transaction = json["transaction"];
if(transaction !== null && transaction !== undefined) {
var reportSuccess = transactions[transaction];
if(reportSuccess !== null && reportSuccess !== undefined) {
reportSuccess(json);
}
delete transactions[transaction];
}
return;
} else if(json["janus"] === "success") {
// Success!
Janus.debug("Got a success on session " + sessionId);
Janus.debug(json);
var transaction = json["transaction"];
if(transaction !== null && transaction !== undefined) {
var reportSuccess = transactions[transaction];
if(reportSuccess !== null && reportSuccess !== undefined) {
reportSuccess(json);
}
delete transactions[transaction];
}
return;
} else if(json["janus"] === "trickle") {
// We got a trickle candidate from Janus
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.debug("This handle is not attached to this session");
return;
}
var candidate = json["candidate"];
Janus.debug("Got a trickled candidate on session " + sessionId);
Janus.debug(candidate);
var config = pluginHandle.webrtcStuff;
if(config.pc && config.remoteSdp) {
// Add candidate right now
Janus.debug("Adding remote candidate:", candidate);
if(!candidate || candidate.completed === true) {
// end-of-candidates
config.pc.addIceCandidate();
} else {
// New candidate
config.pc.addIceCandidate(new RTCIceCandidate(candidate));
}
} else {
// We didn't do setRemoteDescription (trickle got here before the offer?)
Janus.debug("We didn't do setRemoteDescription (trickle got here before the offer?), caching candidate");
if(!config.candidates)
config.candidates = [];
config.candidates.push(candidate);
Janus.debug(config.candidates);
}
} else if(json["janus"] === "webrtcup") {
// The PeerConnection with the gateway is up! Notify this
Janus.debug("Got a webrtcup event on session " + sessionId);
Janus.debug(json);
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.debug("This handle is not attached to this session");
return;
}
pluginHandle.webrtcState(true);
return;
} else if(json["janus"] === "hangup") {
// A plugin asked the core to hangup a PeerConnection on one of our handles
Janus.debug("Got a hangup event on session " + sessionId);
Janus.debug(json);
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.debug("This handle is not attached to this session");
return;
}
pluginHandle.webrtcState(false, json["reason"]);
pluginHandle.hangup();
} else if(json["janus"] === "detached") {
// A plugin asked the core to detach one of our handles
Janus.debug("Got a detached event on session " + sessionId);
Janus.debug(json);
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
// Don't warn here because destroyHandle causes this situation.
return;
}
pluginHandle.detached = true;
pluginHandle.ondetached();
pluginHandle.detach();
} else if(json["janus"] === "media") {
// Media started/stopped flowing
Janus.debug("Got a media event on session " + sessionId);
Janus.debug(json);
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.debug("This handle is not attached to this session");
return;
}
pluginHandle.mediaState(json["type"], json["receiving"]);
} else if(json["janus"] === "slowlink") {
Janus.debug("Got a slowlink event on session " + sessionId);
Janus.debug(json);
// Trouble uplink or downlink
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.debug("This handle is not attached to this session");
return;
}
pluginHandle.slowLink(json["uplink"], json["nacks"]);
} else if(json["janus"] === "error") {
// Oops, something wrong happened
Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason); // FIXME
Janus.debug(json);
var transaction = json["transaction"];
if(transaction !== null && transaction !== undefined) {
var reportSuccess = transactions[transaction];
if(reportSuccess !== null && reportSuccess !== undefined) {
reportSuccess(json);
}
delete transactions[transaction];
}
return;
} else if(json["janus"] === "event") {
Janus.debug("Got a plugin event on session " + sessionId);
Janus.debug(json);
var sender = json["sender"];
if(sender === undefined || sender === null) {
Janus.warn("Missing sender...");
return;
}
var plugindata = json["plugindata"];
if(plugindata === undefined || plugindata === null) {
Janus.warn("Missing plugindata...");
return;
}
Janus.debug(" -- Event is coming from " + sender + " (" + plugindata["plugin"] + ")");
var data = plugindata["data"];
Janus.debug(data);
var pluginHandle = pluginHandles[sender];
if(pluginHandle === undefined || pluginHandle === null) {
Janus.warn("This handle is not attached to this session");
return;
}
var jsep = json["jsep"];
if(jsep !== undefined && jsep !== null) {
Janus.debug("Handling SDP as well...");
Janus.debug(jsep);
}
var callback = pluginHandle.onmessage;
if(callback !== null && callback !== undefined) {
Janus.debug("Notifying application...");
// Send to callback specified when attaching plugin handle
callback(data, jsep);
} else {
// Send to generic callback (?)
Janus.debug("No provided notification callback");
}
} else {
Janus.warn("Unknown message/event '" + json["janus"] + "' on session " + sessionId);
Janus.debug(json);
}
}
// Private helper to send keep-alive messages on WebSockets
function keepAlive() {
if(server === null || !websockets || !connected)
return;
wsKeepaliveTimeoutId = setTimeout(keepAlive, 30000);
var request = { "janus": "keepalive", "session_id": sessionId, "transaction": Janus.randomString(12) };
if(token !== null && token !== undefined)
request["token"] = token;
if(apisecret !== null && apisecret !== undefined)
request["apisecret"] = apisecret;
ws.send(JSON.stringify(request));
}
// Private method to create a session
function createSession(callbacks) {
var transaction = Janus.randomString(12);
var request = { "janus": "create", "transaction": transaction };
if(callbacks["reconnect"]) {
// We're reconnecting, claim the session
connected = false;
request["janus"] = "claim";
request["session_id"] = sessionId;
// If we were using websockets, ignore the old connection
if(ws) {
ws.onopen = null;
ws.onerror = null;
ws.onclose = null;
if(wsKeepaliveTimeoutId) {
clearTimeout(wsKeepaliveTimeoutId);
wsKeepaliveTimeoutId = null;
}
}
}
if(token !== null && token !== undefined)
request["token"] = token;
if(apisecret !== null && apisecret !== undefined)
request["apisecret"] = apisecret;
if(server === null && Janus.isArray(servers)) {
// We still need to find a working server from the list we were given
server = servers[serversIndex];
if(server.indexOf("ws") === 0) {
websockets = true;
Janus.log("Server #" + (serversIndex+1) + ": trying WebSockets to contact Janus (" + server + ")");
} else {
websockets = false;
Janus.log("Server #" + (serversIndex+1) + ": trying REST API to contact Janus (" + server + ")");
}
}
if(websockets) {
ws = Janus.newWebSocket(server, 'janus-protocol');
wsHandlers = {
'error': function() {
Janus.error("Error connecting to the Janus WebSockets server... " + server);
if (Janus.isArray(servers)) {
serversIndex++;
if (serversIndex == servers.length) {
// We tried all the servers the user gave us and they all failed
callbacks.error("Error connecting to any of the provided Janus servers: Is the gateway down?");
return;
}
// Let's try the next server
server = null;
setTimeout(function() {
createSession(callbacks);
}, 200);
return;
}
callbacks.error("Error connecting to the Janus WebSockets server: Is the gateway down?");
},
'open': function() {
// We need to be notified about the success
transactions[transaction] = function(json) {
Janus.debug(json);
if (json["janus"] !== "success") {
Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason); // FIXME
callbacks.error(json["error"].reason);
return;
}
wsKeepaliveTimeoutId = setTimeout(keepAlive, 30000);
connected = true;
sessionId = json["session_id"] ? json["session_id"] : json.data["id"];
if(callbacks["reconnect"]) {
Janus.log("Claimed session: " + sessionId);
} else {
Janus.log("Created session: " + sessionId);
}
Janus.sessions[sessionId] = that;
callbacks.success();
};
ws.send(JSON.stringify(request));
},
'message': function(event) {
handleEvent(JSON.parse(event.data));
},
'close': function() {
if (server === null || !connected) {
return;
}
connected = false;
// FIXME What if this is called when the page is closed?
gatewayCallbacks.error("Lost connection to the gateway (is it down?)");
}
};
for(var eventName in wsHandlers) {
ws.addEventListener(eventName, wsHandlers[eventName]);
}
return;
}
Janus.httpAPICall(server, {
verb: 'POST',
withCredentials: withCredentials,
body: request,
success: function(json) {
Janus.debug(json);
if(json["janus"] !== "success") {
Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason); // FIXME
callbacks.error(json["error"].reason);
return;
}
connected = true;
sessionId = json["session_id"] ? json["session_id"] : json.data["id"];
if(callbacks["reconnect"]) {
Janus.log("Claimed session: " + sessionId);
} else {
Janus.log("Created session: " + sessionId);
}
Janus.sessions[sessionId] = that;
eventHandler();
callbacks.success();
},
error: function(textStatus, errorThrown) {
Janus.error(textStatus + ":", errorThrown); // FIXME
if(Janus.isArray(servers)) {
serversIndex++;
if(serversIndex == servers.length) {
// We tried all the servers the user gave us and they all failed
callbacks.error("Error connecting to any of the provided Janus servers: Is the gateway down?");
return;
}
// Let's try the next server
server = null;
setTimeout(function() { createSession(callbacks); }, 200);
return;
}
if(errorThrown === "")
callbacks.error(textStatus + ": Is the gateway down?");
else
callbacks.error(textStatus + ": " + errorThrown);
}
});
}
// Private method to destroy a session
function destroySession(callbacks) {
callbacks = callbacks || {};
// FIXME This method triggers a success even when we fail
callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
var asyncRequest = true;
if(callbacks.asyncRequest !== undefined && callbacks.asyncRequest !== null)
asyncRequest = (callbacks.asyncRequest === true);
var notifyDestroyed = true;
if(callbacks.notifyDestroyed !== undefined && callbacks.notifyDestroyed !== null)
notifyDestroyed = (callbacks.notifyDestroyed === true);
Janus.log("Destroying session " + sessionId + " (async=" + asyncRequest + ")");
if(!connected) {
Janus.warn("Is the gateway down? (connected=false)");
callbacks.success();
return;
}
if(sessionId === undefined || sessionId === null) {
Janus.warn("No session to destroy");
callbacks.success();
if(notifyDestroyed)
gatewayCallbacks.destroyed();
return;
}
delete Janus.sessions[sessionId];
// No need to destroy all handles first, Janus will do that itself
var request = { "janus": "destroy", "transaction": Janus.randomString(12) };
if(token !== null && token !== undefined)
request["token"] = token;
if(apisecret !== null && apisecret !== undefined)
request["apisecret"] = apisecret;
if(websockets) {
request["session_id"] = sessionId;
var unbindWebSocket = function() {
for(var eventName in wsHandlers) {
ws.removeEventListener(eventName, wsHandlers[eventName]);
}
ws.removeEventListener('message', onUnbindMessage);
ws.removeEventListener('error', onUnbindError);
if(wsKeepaliveTimeoutId) {
clearTimeout(wsKeepaliveTimeoutId);
}
ws.close();
};
var onUnbindMessage = function(event){
var data = JSON.parse(event.data);
if(data.session_id == request.session_id && data.transaction == request.transaction) {
unbindWebSocket();
callbacks.success();
if(notifyDestroyed)
gatewayCallbacks.destroyed();
}
};
var onUnbindError = function(event) {
unbindWebSocket();
callbacks.error("Failed to destroy the gateway: Is the gateway down?");
if(notifyDestroyed)
gatewayCallbacks.destroyed();
};
ws.addEventListener('message', onUnbindMessage);
ws.addEventListener('error', onUnbindError);
ws.send(JSON.stringify(request));
return;
}
Janus.httpAPICall(server + "/" + sessionId, {
verb: 'POST',
async: asyncRequest, // Sometimes we need false here, or destroying in onbeforeunload won't work
withCredentials: withCredentials,
body: request,
success: function(json) {
Janus.log("Destroyed session:");
Janus.debug(json);
sessionId = null;
connected = false;
if(json["janus"] !== "success") {
Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason); // FIXME
}
callbacks.success();
if(notifyDestroyed)
gatewayCallbacks.destroyed();
},
error: function(textStatus, errorThrown) {
Janus.error(textStatus + ":", errorThrown); // FIXME
// Reset everything anyway
sessionId = null;
connected = false;
callbacks.success();
if(notifyDestroyed)
gatewayCallbacks.destroyed();
}
});
}
// Private method to create a plugin handle
function createHandle(callbacks) {
callbacks = callbacks || {};
callbacks.success = (typeof callbacks.success == "function") ? callbacks.success : Janus.noop;
callbacks.error = (typeof callbacks.error == "function") ? callbacks.error : Janus.noop;
callbacks.consentDialog = (typeof callbacks.consentDialog == "function") ? callbacks.consentDialog : Janus.noop;
callbacks.iceState = (typeof callbacks.iceState == "function") ? callbacks.iceState : Janus.noop;
callbacks.mediaState = (typeof callbacks.mediaState == "function") ? callbacks.mediaState : Janus.noop;
callbacks.webrtcState = (typeof callbacks.webrtcState == "function") ? callbacks.webrtcState : Janus.noop;
callbacks.slowLink = (typeof callbacks.slowLink == "function") ? callbacks.slowLink : Janus.noop;
callbacks.onmessage = (typeof callbacks.onmessage == "function") ? callbacks.onmessage : Janus.noop;
callbacks.onlocalstream = (typeof callbacks.onlocalstream == "function") ? callbacks.onlocalstream : Janus.noop;
callbacks.onremotestream = (typeof callbacks.onremotestream == "function") ? callbacks.onremotestream : Janus.noop;
callbacks.ondata = (typeof callbacks.ondata == "function") ? callbacks.ondata : Janus.noop;
callbacks.ondataopen = (typeof callbacks.ondataopen == "function") ? callbacks.ondataopen : Janus.noop;
callbacks.oncleanup = (typeof callbacks.oncleanup == "function") ? callbacks.oncleanup : Janus.noop;
callbacks.ondetached = (typeof callbacks.ondetached == "function") ? callbacks.ondetached : Janus.noop;
if(!connected) {
Janus.warn("Is the gateway down? (connected=false)");
callbacks.error("Is the gateway down? (connected=false)");
return;
}
var plugin = callbacks.plugin;
if(plugin === undefined || plugin === null) {
Janus.error("Invalid plugin");
callbacks.error("Invalid plugin");
return;
}
var opaqueId = callbacks.opaqueId;
var handleToken = callbacks.token ? callbacks.token : token;
var transaction = Janus.randomString(12);
var request = { "janus": "attach", "plugin": plugin, "opaque_id": opaqueId, "transaction": transaction };
if(handleToken !== null && handleToken !== undefined)
request["token"] = handleToken;
if(apisecret !== null && apisecret !== undefined)
request["apisecret"] = apisecret;
if(websockets) {
transactions[transaction] = function(json) {
Janus.debug(json);
if(json["janus"] !== "success") {
Janus.error("Ooops: " + json["error"].code + " " + json["error"].reason); // FIXME
callbacks.error("Ooops: " + json["error"].code + " " + json["error"].reason);
return;
}
var handleId = json.data["id"];
Janus.log("Created handle: " + handleId);
var pluginHandle =
{
session : that,
plugin : plugin,
id : handleId,
token : handleToken,
detached : false,
webrtcStuff : {
started : false,
myStream : null,
streamExternal : false,
remoteStream : null,
mySdp : null,
mediaConstraints : null,
pc : null,
dataChannel : null,
dtmfSender : null,
trickle : true,
iceDone : false,
volume : {
value : null,
timer : null
},
bitrate : {
value : null,
bsnow : null,
bsbefore : null,
tsnow : null,
tsbefore : null,
timer : null
}
},
getId : function() { return handleId; },
getPlugin : function() { return plugin; },
getVolume : function() { return getVolume(handleId); },
isAudioMuted : function() { return isMuted(handleId, false); },
muteAudio : function() { return mute(handleId, false, true); },
unmuteAudio : function() { return mute(handleId, false, false); },
isVideoMuted : function() { return isMuted(handleId, true); },
muteVideo : function() { return mute(handleId, true, true); },
unmuteVideo : function() { return mute(handleId, true, false); },
getBitrate : function() { return getBitrate(handleId); },
send : function(callbacks) { sendMessage(handleId, callbacks); },
data : function(callbacks) { sendData(handleId, callbacks); },
dtmf : function(callbacks) { sendDtmf(handleId, callbacks); },
consentDialog : callbacks.consentDialog,
iceState : callbacks.iceState,
mediaState : callbacks.mediaState,
webrtcState : callbacks.webrtcState,
slowLink : callbacks.slowLink,
onmessage : callbacks.onmessage,