Added Messenger session recording.

meshcentral-config-schema.json

@@ -588,7 +588,7 @@
               "index": { "type": "boolean", "default": false },
               "maxRecordings": { "type": "integer" },
               "maxRecordingSizeMegabytes": { "type": "integer" },
-              "protocols": { "type": "array", "uniqueItems": true, "items": { "type": "integer" } }
+              "protocols": { "type": "array", "uniqueItems": true, "items": { "type": "integer" }, "description": "This is an array: 1 = Terminal, 2 = Desktop, 5 = Files, 100 = Intel AMT WSMAN, 101 = Intel AMT Redirection, 200 = Messenger" }
             },
             "required": [ "protocols" ]
           },

meshrelay.js

@@ -308,16 +308,29 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                     // Setup session recording
                     var sessionUser = obj.user;
                     if (sessionUser == null) { sessionUser = obj.peer.user; }
-                    if ((obj.req.query.p != null) && (obj.req.query.nodeid != null) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(obj.req.query.p)) >= 0))))) {
+
+                    // If this is a MeshMessenger session, set the protocol to 200.
+                    var xtextSession = 0;
+                    var recordSession = false;
+                    if ((obj.id.startsWith('meshmessenger/node/') == true) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(200)) >= 0))))) {
+                        var split = obj.id.split('/');
+                        obj.req.query.nodeid = split[1] + '/' + split[2] + '/' + split[3];
+                        recordSession = true;
+                        xtextSession = 2; // 1 = Raw recording of all strings, 2 = Record chat session messages only.
+                    }
+                    if ((obj.req.query.p != null) && (obj.req.query.nodeid != null) && (sessionUser != null) && (domain.sessionrecording == true || ((typeof domain.sessionrecording == 'object') && ((domain.sessionrecording.protocols == null) || (domain.sessionrecording.protocols.indexOf(parseInt(obj.req.query.p)) >= 0))))) { recordSession = true; }
+
+                    if (recordSession) {
                         // Get the computer name
                         parent.db.Get(obj.req.query.nodeid, function (err, nodes) {
                             var xusername = '', xdevicename = '', xdevicename2 = null, node = null;
                             if ((nodes != null) && (nodes.length == 1)) { node = nodes[0]; xdevicename2 = node.name; xdevicename = '-' + parent.common.makeFilename(node.name); }
 
                             // Check again if we need to do recording
-                            if (domain.sessionrecording.onlyselecteddevicegroups === true) {
+                            if ((node == null) || (domain.sessionrecording.onlyselecteddevicegroups === true)) {
-                                var mesh = parent.meshes[node.meshid];
+                                var mesh = null;
-                                if ((mesh.flags == null) || ((mesh.flags & 4) == 0)) {
+                                if (node != null) { mesh = parent.meshes[node.meshid]; }
+                                if ((node == null) || (mesh == null) || (mesh.flags == null) || ((mesh.flags & 4) == 0)) {
                                     // Do not record the session, just send session start
                                     try { ws.send('c'); } catch (ex) { } // Send connect to both peers
                                     try { relayinfo.peer1.ws.send('c'); } catch (ex) { }
@@ -337,7 +350,9 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                             if (sessionUser._id) { xusername = '-' + parent.common.makeFilename(sessionUser._id.split('/')[2]); }
 
                             var now = new Date(Date.now());
-                            var recFilename = 'relaysession' + ((domain.id == '') ? '' : '-') + domain.id + '-' + now.getUTCFullYear() + '-' + parent.common.zeroPad(now.getUTCMonth(), 2) + '-' + parent.common.zeroPad(now.getUTCDate(), 2) + '-' + parent.common.zeroPad(now.getUTCHours(), 2) + '-' + parent.common.zeroPad(now.getUTCMinutes(), 2) + '-' + parent.common.zeroPad(now.getUTCSeconds(), 2) + xusername + xdevicename + '-' + obj.id + '.mcrec'
+                            var xsessionid = obj.id;
+                            if ((typeof xsessionid == 'string') && (xsessionid.startsWith('meshmessenger/node/') == true)) { xsessionid = 'Messenger' }
+                            var recFilename = 'relaysession' + ((domain.id == '') ? '' : '-') + domain.id + '-' + now.getUTCFullYear() + '-' + parent.common.zeroPad(now.getUTCMonth(), 2) + '-' + parent.common.zeroPad(now.getUTCDate(), 2) + '-' + parent.common.zeroPad(now.getUTCHours(), 2) + '-' + parent.common.zeroPad(now.getUTCMinutes(), 2) + '-' + parent.common.zeroPad(now.getUTCSeconds(), 2) + xusername + xdevicename + '-' + xsessionid + (xtextSession ? '.txt' : '.mcrec');
                             var recFullFilename = null;
                             if (domain.sessionrecording.filepath) {
                                 try { parent.parent.fs.mkdirSync(domain.sessionrecording.filepath); } catch (e) { }
@@ -375,9 +390,10 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                                         protocol: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p),
                                         nodeid: (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.nodeid)
                                     };
+
                                     if (xdevicename2 != null) { metadata.devicename = xdevicename2; }
                                     var firstBlock = JSON.stringify(metadata);
-                                    var logfile = { fd: fd, lock: false, filename: recFullFilename, startTime: Date.now(), size: 0 };
+                                    var logfile = { fd: fd, lock: false, filename: recFullFilename, startTime: Date.now(), size: 0, text: xtextSession };
                                     if (node != null) { logfile.nodeid = node._id; logfile.meshid = node.meshid; logfile.name = node.name; logfile.icon = node.icon; }
                                     recordingEntry(logfile, 1, 0, firstBlock, function () {
                                         try { relayinfo.peer1.ws.logfile = ws.logfile = logfile; } catch (ex) {
@@ -441,6 +457,9 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                     return null;
                 }
             } else {
+                // Set authenticated side as browser side for messenger sessions
+                if ((obj.id.startsWith('meshmessenger/node/') == true) && obj.authenticated) { obj.req.query.browser = 1; }
+
                 // Wait for other relay connection
                 if ((obj.id.startsWith('meshmessenger/node/') == true) && obj.authenticated && (parent.parent.firebase != null)) {
                     // This is an authenticated messenger session, push messaging may be allowed. Don't hold traffic.
@@ -578,6 +597,7 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                         if (obj.req.query.p == 1) { msg = 'Ended terminal session', msgid = 10; }
                         else if (obj.req.query.p == 2) { msg = 'Ended desktop session', msgid = 11; }
                         else if (obj.req.query.p == 5) { msg = 'Ended file management session', msgid = 12; }
+                        else if (obj.req.query.p == 200) { msg = 'Ended messenger session', msgid = 112; }
                         if (user) {
                             var event = { etype: 'relay', action: 'relaylog', domain: domain.id, userid: user._id, username: user.name, msgid: msgid, msgArgs: [obj.id, obj.req.clientIp, obj.peer.req.clientIp, Math.floor((Date.now() - ws.time) / 1000)], msg: msg + ' \"' + obj.id + '\" from ' + obj.req.clientIp + ' to ' + obj.peer.req.clientIp + ', ' + Math.floor((Date.now() - ws.time) / 1000) + ' second(s)', protocol: obj.req.query.p, nodeid: obj.req.query.nodeid };
                             parent.parent.DispatchEvent(['*', user._id], obj, event);
@@ -617,6 +637,7 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
                         var event = { etype: 'relay', action: 'recording', domain: domain.id, nodeid: tag.logfile.nodeid, msg: "Finished recording session" + (sessionLength ? (', ' + sessionLength + ' second(s)') : ''), filename: basefile, size: tag.logfile.size };
                         if (user) { event.userids = [user._id]; } else if (peer.user) { event.userids = [peer.user._id]; }
                         var xprotocol = (((obj.req == null) || (obj.req.query == null)) ? null : obj.req.query.p);
+                        if ((xprotocol == null) && (logfile.text == 2)) { xprotocol = 200; }
                         if (xprotocol != null) { event.protocol = parseInt(xprotocol); }
                         var mesh = parent.meshes[tag.logfile.meshid];
                         if (mesh != null) { event.meshname = mesh.name; event.meshid = mesh._id; }
@@ -648,26 +669,64 @@ function CreateMeshRelayEx(parent, ws, req, domain, user, cookie) {
     // Record a new entry in a recording log
     function recordingEntry(logfile, type, flags, data, func, tag) {
         try {
-            if (typeof data == 'string') {
+            if (logfile.text) {
-                // String write
+                // Text recording format
-                var blockData = Buffer.from(data), header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
+                var out = '';
-                header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
+                const utcDate = new Date(Date.now());
-                header.writeInt16BE(flags, 2); // Flags (1 = Binary, 2 = User)
+                if (type == 1) {
-                header.writeInt32BE(blockData.length, 4); // Size
+                    // End of start
-                header.writeIntBE(new Date(), 10, 6); // Time
+                    out = data + '\r\n' + utcDate.toUTCString() + ', ' + "<<<START>>>" + '\r\n';
-                var block = Buffer.concat([header, blockData]);
+                } else if (type == 3) {
-                parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
+                    // End of log
-                logfile.size += block.length;
+                    out = utcDate.toUTCString() + ', ' + "<<<END>>>" + '\r\n';
+                } else if (typeof data == 'string') {
+                    // Log message
+                    if (logfile.text == 1) {
+                        out = utcDate.toUTCString() + ', ' + data + '\r\n';
+                    } else if (logfile.text == 2) {
+                        try {
+                            var x = JSON.parse(data);
+                            if (typeof x.action == 'string') {
+                                if ((x.action == 'chat') && (typeof x.msg == 'string')) { out = utcDate.toUTCString() + ', ' + (((flags & 2) ? '--> ' : '<-- ') + x.msg + '\r\n'); }
+                                else if ((x.action == 'file') && (typeof x.name == 'string') && (typeof x.size == 'number')) { out = utcDate.toUTCString() + ', ' + (((flags & 2) ? '--> ' : '<-- ') + "File Transfer" + ', \"' + x.name + '\" (' + x.size + ' ' + "bytes" + ')\r\n'); }
+                            } else { out = utcDate.toUTCString() + ', ' + data + '\r\n'; }
+                        } catch (ex) {
+                            out = utcDate.toUTCString() + ', ' + data + '\r\n';
+                        }
+                    }
+                }
+                if (out != null) {
+                    // Log this event
+                    const block = Buffer.from(out);
+                    parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
+                    logfile.size += block.length;
+                } else {
+                    // Skip logging this.
+                    func(logfile, tag);
+                }
             } else {
-                // Binary write
+                // Binary recording format
-                var header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
+                if (typeof data == 'string') {
-                header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
+                    // String write
-                header.writeInt16BE(flags | 1, 2); // Flags (1 = Binary, 2 = User)
+                    var blockData = Buffer.from(data), header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
-                header.writeInt32BE(data.length, 4); // Size
+                    header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
-                header.writeIntBE(new Date(), 10, 6); // Time
+                    header.writeInt16BE(flags, 2); // Flags (1 = Binary, 2 = User)
-                var block = Buffer.concat([header, data]);
+                    header.writeInt32BE(blockData.length, 4); // Size
-                parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
+                    header.writeIntBE(new Date(), 10, 6); // Time
-                logfile.size += block.length;
+                    var block = Buffer.concat([header, blockData]);
+                    parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
+                    logfile.size += block.length;
+                } else {
+                    // Binary write
+                    var header = Buffer.alloc(16); // Header: Type (2) + Flags (2) + Size(4) + Time(8)
+                    header.writeInt16BE(type, 0); // Type (1 = Header, 2 = Network Data)
+                    header.writeInt16BE(flags | 1, 2); // Flags (1 = Binary, 2 = User)
+                    header.writeInt32BE(data.length, 4); // Size
+                    header.writeIntBE(new Date(), 10, 6); // Time
+                    var block = Buffer.concat([header, data]);
+                    parent.parent.fs.write(logfile.fd, block, 0, block.length, function () { func(logfile, tag); });
+                    logfile.size += block.length;
+                }
             }
         } catch (ex) { console.log(ex); func(logfile, tag); }
     }

sample-config-advanced.json

@@ -292,7 +292,7 @@
         "_index": true,
         "_maxRecordings": 10,
         "_maxRecordingSizeMegabytes": 3,
-        "__protocols__": "Is an array: 1 = Terminal, 2 = Desktop, 5 = Files, 100 = Intel AMT WSMAN, 101 = Intel AMT Redirection",
+        "__protocols__": "Is an array: 1 = Terminal, 2 = Desktop, 5 = Files, 100 = Intel AMT WSMAN, 101 = Intel AMT Redirection, 200 = Messenger",
         "protocols": [ 1, 2, 101 ]
       },
       "_authStrategies": {

views/default.handlebars

@@ -11943,7 +11943,8 @@
             108: "User login attempt with incorrect 2nd factor from {0}, {1}, {2}",
             109: "User login attempt on locked account from {0}, {1}, {2}",
             110: "Invalid user login attempt from {0}, {1}, {2}",
-            111: "Device requested Intel(R) AMT ACM TLS activation, FQDN: {0}"
+            111: "Device requested Intel(R) AMT ACM TLS activation, FQDN: {0}",
+            112: "Ended messenger session \"{0}\" from {1} to {2}, {3} second(s)"
         };
 
         // Highlights the device being hovered
@@ -13702,6 +13703,14 @@
                     }
                 }
             }
+
+            if (rec.protocol == 1) { sessionName += ' - ' + "Terminal Session"; }
+            if (rec.protocol == 2) { sessionName += ' - ' + "Desktop Session"; }
+            if (rec.protocol == 5) { sessionName += ' - ' + "File Transfer"; }
+            if (rec.protocol == 100) { sessionName += ' - ' + "Intel® AMT WSMAN"; }
+            if (rec.protocol == 101) { sessionName += ' - ' + "Intel® AMT Redirection"; }
+            if (rec.protocol == 200) { sessionName += ' - ' + "Messenger"; }
+
             var actions = '', icon = 'm0';
             if (rec.present == 1) { icon = 'm1'; actions = '<div style=cursor:pointer;float:right><a onclick=downloadFile("recordings.ashx?file=' + encodeURIComponentEx(rec.filename) + '")><img src=images/link4.png height=10 width=10 title="Download Recording"></a>&nbsp;</div>'; }
             var x = '<tr tabindex=0 onmouseover=userMouseHover2(this,1) onmouseout=userMouseHover2(this,0) onkeypress="if (event.key==\'Enter\') showRecordingDialog(event,\'' + i + '\')"><td style=cursor:pointer>';

views/messenger.handlebars

@@ -23,6 +23,7 @@
             <div id="camButton" class="icon2 topButton" title="Activate camera & microphone" style="display:none" onclick="camButtonClick()"></div>
             <div id="micButton" class="icon6 topButton" title="Activate microphone" style="display:none" onclick="micButtonClick()"></div>
             <div id="hangupButton" class="icon11 topRedButton" title="Hang up" style="display:none" onclick="hangUpButtonClick(1)"></div>
+            <div id="recordIcon" class='deskareaicon' title="Server is recording this session" style="background-color:red;margin:6px;margin-top:7px;border-radius:12px;height:24px;width:24px;float:right;display:none"></div>
         </div>
         <div style="padding-top:9px;padding-left:6px;font-size:20px;display:inline-block"><b><span id="xtitle"></span></b></div>
     </div>
@@ -88,6 +89,7 @@
             var localOutText = false;
             var remoteOutText = false;
             var remoteImage = false;
+            var serverRecording = false;
 
             // File transfer state
             var fileUploads = [];
@@ -279,7 +281,7 @@
                     //console.log('ondatachannel');
                     webchannel = ev.channel;
                     webchannel.onmessage = function (event) { processMessage(event.data, 2); };
-                    webchannel.onopen = function () { webchannel.ok = true; updateControls(); sendws({ action: 'rtcSwitch', v: 0 }); };
+                    webchannel.onopen = function () { webchannel.ok = true; updateControls(); if (serverRecording == false) { sendws({ action: 'rtcSwitch', v: 0 }); } };
                     webchannel.onclose = function (event) { if (webchannel && webchannel.ok) { disconnect(); } else { hangUpButtonClick(0); } }
                 }
                 webrtc.onnegotiationneeded = function (event) {
@@ -316,7 +318,7 @@
                 if (startDataChannel == true) {
                     webchannel = webrtc.createDataChannel('DataChannel', {}); // { ordered: false, maxRetransmits: 2 }
                     webchannel.onmessage = function (event) { processMessage(event.data, 2); };
-                    webchannel.onopen = function () { webchannel.ok = true; updateControls(); sendws({ action: 'rtcSwitch', v: 0 }); };
+                    webchannel.onopen = function () { webchannel.ok = true; updateControls(); if (serverRecording == false) { sendws({ action: 'rtcSwitch', v: 0 }); } };
                     webchannel.onclose = function (event) { if (webchannel && webchannel.ok) { disconnect(); } else { hangUpButtonClick(0); } }
                 }
 
@@ -344,11 +346,13 @@
 
             // Indicate to peer that data traffic will no longer be sent over websocket and start holding traffic.
             function performWebRtcSwitch() {
-                if (webchannel && webchannel.ok) { sendws({ action: 'rtcSwitch', v: 1 }); webchannel.xoutBuffer = []; }
+                if (!serverRecording && webchannel && webchannel.ok) { sendws({ action: 'rtcSwitch', v: 1 }); webchannel.xoutBuffer = []; }
             }
 
             // Disconnect everything
             function disconnect() {
+                serverRecording = false;
+                QV('recordIcon', false);
                 if (state > 0) { displayControl("Connection closed."); }
                 if (state > 1) { setTimeout(start, 500); }
                 cancelAllFileTransfers();
@@ -368,7 +372,7 @@
             function send(data) {
                 if ((state != 2) && (pushMessaging == false)) return; // If not in connected state, ignore this.
                 if (typeof data == 'object') { data = JSON.stringify(data); } // If this is an object, convert it to a string.
-                if (webchannel && webchannel.ok) { if (webchannel.xoutBuffer != null) { webchannel.xoutBuffer.push(data); } else { webchannel.send(data); } } // If WebRTC channel is possible, use it or hold until we can use it.
+                if (!serverRecording && webchannel && webchannel.ok) { if (webchannel.xoutBuffer != null) { webchannel.xoutBuffer.push(data); } else { webchannel.send(data); } } // If WebRTC channel is possible, use it or hold until we can use it.
                 else { if (socket != null) { try { socket.send(data); } catch (ex) { } } } // If a websocket channel is present, use that.
             }
 
@@ -520,7 +524,7 @@
                 file.id = Math.random();
                 fileUploads.push(file);
                 chatTextSession += ((new Date()).toLocaleTimeString() + ' - ' + "Upload" + '> ' + file.name + ' (' + file.size + ' ' + "bytes" + ')\r\n');
-                QA('xmsg', '<div style="clear:both"></div><div id="FILEUP-' + file.id + '" class="localBubble" style="width:240px;cursor:pointer" onclick="cancelFileTransfer(\'' + file.id + '\')"><div id="FILEUP-ICON-' + file.id + '" class="fileicon" style="float:left;width:32px;height:32px"></div><div><div id="FILEUP-NAME-' + file.id + '" style="height:16px;overflow:hidden;white-space:nowrap;" title="' + file.name + '">' + file.name + '</div><div style="width:200px;background-color:lightgray;margin-left:32px;border-radius:3px;margin-top:3px;height:11px"><div id="FILEUP-PROGRESS-' + file.id + '" style="width:0px;background-color:green;border-radius:3px;height:11px">&nbsp;</div></div></div></div>');
+                QA('xmsg', '<div style="clear:both"></div><div id="FILEUP-' + file.id + '" class="localBubble" style="font-size:14px;width:240px;cursor:pointer" onclick="cancelFileTransfer(\'' + file.id + '\')"><div id="FILEUP-ICON-' + file.id + '" class="fileicon" style="float:left;width:32px;height:32px"></div><div><div id="FILEUP-NAME-' + file.id + '" style="height:20px;overflow:hidden;white-space:nowrap;" title="' + file.name + '">' + file.name + '</div><div style="width:200px;background-color:lightgray;margin-left:32px;border-radius:3px;margin-top:3px;height:11px"><div id="FILEUP-PROGRESS-' + file.id + '" style="width:0px;background-color:green;border-radius:3px;height:11px">&nbsp;</div></div></div></div>');
                 Q('xmsgparent').scrollTop = Q('xmsgparent').scrollHeight;
                 send({ action: 'file', size: file.size, id: file.id, type: file.type, name: file.name });
                 if (currentFileUpload == null) continueFileUpload();
@@ -530,7 +534,7 @@
                 if (state != 2) return;
                 fileDownloads[file.id] = file;
                 chatTextSession += ((new Date()).toLocaleTimeString() + ' - ' + "Download" + '> ' + file.name + ' (' + file.size + ' ' + "bytes" + ')\r\n');
-                QA('xmsg', '<div style="clear:both"></div><div id="FILEUP-' + file.id + '" class="remoteBubble" style="width:240px;cursor:pointer" onclick="saveFileTransfer(\'' + file.id + '\')"><div id="FILEUP-ICON-' + file.id + '" class="fileicon" style="float:left;width:32px;height:32px"></div><div><div id="FILEUP-NAME-' + file.id + '" style="height:16px;overflow:hidden;white-space:nowrap;" title="' + file.name + '">' + file.name + '</div><div style="width:200px;background-color:lightgray;margin-left:32px;border-radius:3px;margin-top:3px;height:11px"><div id="FILEUP-PROGRESS-' + file.id + '" style="width:0px;background-color:green;border-radius:3px;height:11px">&nbsp;</div></div></div></div>');
+                QA('xmsg', '<div style="clear:both"></div><div id="FILEUP-' + file.id + '" class="remoteBubble" style="font-size:14px;width:240px;cursor:pointer" onclick="saveFileTransfer(\'' + file.id + '\')"><div id="FILEUP-ICON-' + file.id + '" class="fileicon" style="float:left;width:32px;height:32px"></div><div><div id="FILEUP-NAME-' + file.id + '" style="height:20px;overflow:hidden;white-space:nowrap;" title="' + file.name + '">' + file.name + '</div><div style="width:200px;background-color:lightgray;margin-left:32px;border-radius:3px;margin-top:3px;height:11px"><div id="FILEUP-PROGRESS-' + file.id + '" style="width:0px;background-color:green;border-radius:3px;height:11px">&nbsp;</div></div></div></div>');
                 Q('xmsgparent').scrollTop = Q('xmsgparent').scrollHeight;
             }
 
@@ -717,6 +721,8 @@
                     socket.onclose = function () { disconnect(); }
                     socket.onmessage = function (msg) {
                         if ((state < 2) && (typeof msg.data == 'string') && ((msg.data == 'c') || (msg.data == 'cr'))) {
+                            serverRecording = (msg.data == 'cr');
+                            QV('recordIcon', serverRecording);
                             hangUpButtonClick(0, true);
                             hangUpButtonClick(1, true);
                             hangUpButtonClick(2, true);
@@ -742,9 +748,9 @@
             start();
 
             function onUnLoad() {
-                for (var i = 0; i < 3; i++) { if (webrtcSessions[i]) { webrtcSessions[i].close(); delete webrtcSessions[i]; } }
+                for (var i = 0; i < 3; i++) { if (webrtcSessions[i]) { try { webrtcSessions[i].close(); delete webrtcSessions[i]; } catch (ex) { } } }
-                if (webchannel != null) { try { webchannel.close(); } catch (e) { } webchannel = null; }
+                if (webchannel != null) { try { webchannel.close(); } catch (ex) { } webchannel = null; }
-                if (socket != null) { try { socket.close(); } catch (e) { } socket = null; }
+                if (socket != null) { try { socket.close(); } catch (ex) { } socket = null; }
             }
 
             function isSafeString3(str) { return ((typeof str == 'string') && (str.indexOf('<') == -1) && (str.indexOf('>') == -1) && (str.indexOf('&') == -1) && (str.indexOf('"') == -1) && (str.indexOf('\'') == -1) && (str.indexOf('+') == -1) && (str.indexOf('(') == -1) && (str.indexOf(')') == -1) && (str.indexOf('#') == -1) && (str.indexOf(':') == -1)) };