https://www.jitbit.com/screensharing/#883291124783816021000000238419

Scan-ID:
c3d39360-bd0b-44ec-83b5-36cd171d9de8Beendet
Eingereichte URL:
https://www.jitbit.com/screensharing/#883291124783816021000000238419
Bericht beendet:

Die von der Seite ausgehenden identifizierten Links

JavaScript-Variablen · 32 gefunden

Globale JavaScript-Variablen, die in das Window Object einer Seite geladen werden, sind Variablen, die außerhalb von Funktionen deklariert werden und von jeder Stelle des Codes innerhalb des aktuellen Bereichs zugänglich sind

NameTyp
onbeforetoggleobject
documentPictureInPictureobject
onscrollendobject
qobject
$function
iofunction
iceServersobject
getNamefunction
startfunction
displayStatusfunction

Konsolenprotokoll-Meldungen · 9 gefunden

In der Web-Konsole protokollierte Meldungen

TypKategorieProtokoll
logother
URL
https://www.jitbit.com/screensharing/
Text
Created remote peer connection object pc2
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 setRemoteDescription start
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 received remote stream
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 createAnswer start
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 setLocalDescription start
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 ICE state: checking
logjavascript
URL
https://www.jitbit.com/screensharing/
Text
ICE state change event: JSHandle@object
logother
URL
https://www.jitbit.com/screensharing/
Text
pc2 ICE state: connected
logjavascript
URL
https://www.jitbit.com/screensharing/
Text
ICE state change event: JSHandle@object

HTML

Der HTML-Rohtext der Seite

<!DOCTYPE html><html lang="en"><head>
		<title>Free screen sharing via browser</title>

	<meta name="description" content="Free screen sharing">
	<meta name="twitter:card" content="summary">
	<meta name="twitter:site" content="@jitbithelpdesk">
	<meta name="twitter:title" content="Screen sharing">
	<meta name="twitter:image" content="https://www.jitbit.com/images/i/OWZdMMs.jpg?1">
	<meta name="twitter:description" content="Free screen sharing via a browser, no software needed">

	<meta property="og:site_name" content="jitbit.com">
	<meta property="og:title" content="Screen sharing">
	<meta property="og:type" content="product">
	<meta property="og:image" content="https://www.jitbit.com/images/i/OWZdMMs.jpg?1">
	<meta property="og:description" content="Free screen sharing via a browser, no software needed">
	<style>
		video{width:100%;margin-bottom:20px}
	</style>
	<link href="https://www.jitbit.com/screensharing/" rel="canonical">

    <script>
		if(!location.hash.replace('#', '').length) {
			location.hash = (Math.random() * 100).toString().replace('.', '') + performance.now().toString().replace('.', '');
        }
    </script>
			<link rel="alternate" id="rssLink" type="application/rss+xml" title="Jitbit Software" href="https://www.jitbit.com/news/rss/">
		<link rel="shortcut icon" href="//www.jitbit.com/favicon.ico">
		<link rel="icon" href="/favicon.ico">
		<link rel="icon" type="image/png" href="/favicon.png">
		<meta name="viewport" content="width=device-width, initial-scale=1.0">
		<link rel="stylesheet" href="/assets/css/style.min.css?v=9109-19962">
		<link rel="dns-prefetch" href="https://fonts.googleapis.com/">

		<link rel="stylesheet" onload="this.onload=null;this.removeAttribute('media');" href="https://fonts.googleapis.com/css?family=Titillium+Web:400,600&amp;display=swap">

		<script>
			window.q=[];window.$=function(f){q.push(f)}
		</script>

		<meta name="slack-app-id" content="AGW609EKZ">

		
	</head>
	<body style="">
	<div id="header" class="homepage">
		<div>
		<div class="container">
			<a href="/" id="logo">
				<img id="cloud" src="/assets/img/logocloud.svg" width="27" alt="Jitbit logo - makers of Jitbit Helpdesk">
					<img src="/images/JitBit-white.svg">
			</a>
        
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					<li id="productsLi">
						<a title="helpdesk pricing" href="#">More free tools</a>
						<div id="productsPopup">
							<ul>
								<li><a href="/sslcheck/">SSL Check</a></li>
								<li><a href="/screencapture/">Screen Capture</a></li>
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					</li>
					<li style="padding-right:0"><a href="/company/">About</a></li>
				</ul>
			
	<div class="row" style="clear:both">
		<h1 style="text-align:center">Screen Sharing - right from your browser</h1>
		<p style="text-align:center">This is a free, very basic browser based screen sharing app between 2 people. Use it to quickly share your screen with a co-worker remotely.</p>

		<video id="localVideo" playsinline="" autoplay="" muted="" style="display:none"></video>

		<div style="text-align:center" class="buttons">
			<a id="startButton" class="trynowbutton" href="javascript:;">Share my screen</a>
			<a id="hangupButton" href="javascript:;" style="display:none">Hang Up</a>
			<a id="copyLinkBtn" href="javascript:;" style="display:none">Copy link to clipboard</a>
		</div>

		<p id="statusMsg" style="text-align:center;display:none"></p>

	</div>

		</div>
		</div>
	</div>

		



<div class="container content">

	<div class="row">
		<div class="span12">
			<br>
			<h3>What is this?</h3>

			<p>This is a free, very basic browser based screen sharing app between 2 people. Use it to quickly share your screen with a co-worker remotely or provide technical support without any additional <a href="/helpdesk/">support software</a>.</p>
			
			<p>No plugins, no extensions, no 3rd party software like TeamViewer or something. Just a modern browser that supports WebRTC (current beta works in Chromium browsers, somewhat functional in Firefox, with full Safari/Firefox support coming up shortly).</p>

			<h3>But why?</h3>

			<p>We've built this fun little side project during the days of COVID-19 when everyone's remote and found themselves in need of video connectivity tools. Some of those video tools (cough cough) are not very privacy friendly... OTOH there's a peer-2-peer video technology that's literally built right into everyone's browser.</p>

			<h3>How secure is the video?</h3>

			<p>This is peer 2 peer, the video stream is not being sent to our servers, your browser streams the video directly to the viewer's browser.</p>

			<h3>But I can spot connections to your server!</h3>

			<p>Yes, but only during the handshake phase. The two browsers need to exchange some magic numbers before they can find each other. So we wrote a small signaling server to help with that (and also manage "rooms"). See for yourself: just look at this page's source code, it's all there ;)</p>

			<h3>Can someone guess my "room number"?</h3>

			<p>Unfortunately, yes. All rooms are public in this beta version. But once someone's joined - the app won't let anyone in. Also you can add some more random stuff to the URL-hash and load the page again to make it harder to guess.</p>

			<h3>Help, it won't work</h3>

			<p>This is an early stage experiment, a proof of concept if you will. It might not work in Firefox or if both you and your counterparty are behind symmatric NATs. It <i>should</i> work though, but there are always some real world scenarios where it won't...</p>

			<p>If something's not working: ask your coworker to close their browser, then refresh this page, re-share the screen and send the link to your coworker again.</p>

			<p><a href="https://twitter.com/intent/tweet?text=Screen%20sharing%20via%20browser%20https%3A//www.jitbit.com/screensharing/">retweet</a></p>
		</div>
	</div>

</div>

<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.3.0/socket.io.js"> </script>

<script>

	'use strict';

	//try to use google stun servers
	var iceServers = [{
        'urls': [
			'stun:stun3.l.google.com:19305',
			'stun:stun4.l.google.com:19305',
			'stun:stun.l.google.com:19305',
			'stun:stun1.l.google.com:19302',
			'stun:stun2.l.google.com:19305',
			'stun:stun2.l.google.com:19302',
			'stun:stun4.l.google.com:19302',
			'stun:stun.l.google.com:19302',
			'stun:stun1.l.google.com:19305',
			'stun:stun3.l.google.com:19302',
        ]
	}];
	iceServers = {
		iceServers: iceServers,
		iceTransportPolicy: 'all',
		bundlePolicy: 'max-bundle',
		iceCandidatePoolSize: 0
	};
	if (window.chrome) { //if chrome
		iceServers = {
			iceServers: iceServers.iceServers
		};
	}

	const SIGNALING_SERVER = "https://nodesocket.jitbit.com/";

	let _stream;
	const _room = location.hash.replace('#', '');
	const _socket = io(SIGNALING_SERVER)
		.emit("join", _room);
    
	_socket.on('join', function () { initBroadcasting(); }); //listener has joined, start session

	const startButton = document.getElementById('startButton');
	const hangupButton = document.getElementById('hangupButton');
	const copyLinkBtn = document.getElementById('copyLinkBtn');
	startButton.addEventListener('click', start);
	hangupButton.addEventListener('click', hangup);
	copyLinkBtn.addEventListener('click', copyLink);

	const _localVideo = document.getElementById('localVideo');

	let pc1;
	let pc2;
	const offerOptions = {
		offerToReceiveAudio: 0,
		offerToReceiveVideo: 1
	};

	function getName(pc) {
		return (pc === pc1) ? 'pc1' : 'pc2';
	}

	async function start() {
		startButton.style.display= 'none';
		localVideo.style.display = copyLinkBtn.style.display = hangupButton.style.display = '';
		try {
			if(navigator.mediaDevices.getDisplayMedia) {
				_stream = await navigator.mediaDevices.getDisplayMedia({ video: true });
            }
            else if(navigator.getDisplayMedia) {
				_stream = await navigator.getDisplayMedia({ video: true });
            }
			console.log('Received local stream');
			_localVideo.srcObject = _stream;

			displayStatus("Waiting for someone to join (give them the current URL)...");
		} catch (e) {
			alert(`getUserMedia() error: ${e.name}`);
		}
	}

	function displayStatus(msg) {
		document.getElementById("statusMsg").style.display = '';
		document.getElementById("statusMsg").innerText = msg;
	}

	async function initBroadcasting() {
		displayStatus("Someone's trying to join");

		hangupButton.disabled = false;
		console.log('Starting call');

		pc1 = new RTCPeerConnection(iceServers);
		console.log('Created local peer connection object pc1');
		pc1.addEventListener('icecandidate', e => onIceCandidate(e, 'pc1'));
		pc1.addEventListener('iceconnectionstatechange', e => onIceStateChange(pc1, e));

		_stream.getTracks().forEach(track => pc1.addTrack(track, _stream));
		console.log('Added local stream to pc1');

		try {
			console.log('pc1 createOffer start');
			const offer = await pc1.createOffer(offerOptions);
			await onCreateOfferSuccess(offer);
		} catch (e) {
			console.log(`Failed to create session description: ${e.toString()}`);
		}
	}

	async function onCreateOfferSuccess(desc) {
		console.log('pc1 setLocalDescription start');
		try {
			await pc1.setLocalDescription(desc);
		} catch (e) {
			onSetSessionDescriptionError();
		}

		_socket.emit("readyToBroadcast", desc); //initReceiving(desc);
	}

	_socket.on('readyToBroadcast', function (desc) { initReceiving(desc); })

	async function initReceiving(desc) {
		copyLinkBtn.style.display = startButton.style.display = 'none';
		localVideo.style.display = '';
		pc2 = new RTCPeerConnection(iceServers);
		console.log('Created remote peer connection object pc2');
		pc2.addEventListener('icecandidate', e => onIceCandidate(e, 'pc2'));
		pc2.addEventListener('iceconnectionstatechange', e => onIceStateChange(pc2, e));
		pc2.addEventListener('track', gotRemoteStream);

		console.log('pc2 setRemoteDescription start');
		try {
			await pc2.setRemoteDescription(desc);
		} catch (e) {
			onSetSessionDescriptionError();
		}

		console.log('pc2 createAnswer start');
		try {
			const answer = await pc2.createAnswer();
			await onCreateAnswerSuccess(answer);
		} catch (e) {
			onCreateSessionDescriptionError(e);
		}
	}

	function onSetSessionDescriptionError(error) {
		console.log(`Failed to set session description: ${error.toString()}`);
	}

	function gotRemoteStream(e) {
		_localVideo.controls = _localVideo.autoplay = _localVideo.playsinline = _localVideo.controls = true;
		if (_localVideo.srcObject !== e.streams[e.streams.length-1]) {
			_localVideo.srcObject = e.streams[e.streams.length-1];
			console.log('pc2 received remote stream');
		}
	}

	async function onCreateAnswerSuccess(desc) {
		console.log('pc2 setLocalDescription start');
		try {
			await pc2.setLocalDescription(desc);
			_socket.emit("readyToReceive", desc); //startBroadcasting(desc);
		} catch (e) {
			onSetSessionDescriptionError(e);
		}
	}
	_socket.on('readyToReceive', function (desc) { startBroadcasting(desc); });

	async function startBroadcasting(desc) {
		displayStatus("Broadcasting");
		console.log('pc1 setRemoteDescription start');
		try {
			await pc1.setRemoteDescription(desc);
		} catch (e) {
			onSetSessionDescriptionError(e);
		}
	}

	async function onIceCandidate(event, type) {
		_socket.emit("ice", {
			type: type,
			candidate: JSON.stringify(event.candidate)
		});
	}

	_socket.on('ice', async function (data) {
		if (data.type == 'pc1')
			await pc2.addIceCandidate(JSON.parse(data.candidate));
		else if (data.type == 'pc2')
			await pc1.addIceCandidate(JSON.parse(data.candidate));
	});

	function onIceStateChange(pc, event) {
		if (pc) {
			console.log(`${getName(pc)} ICE state: ${pc.iceConnectionState}`);
			console.log('ICE state change event: ', event);
		}
	}

	function hangup() {
		console.log('Ending call');
		if(pc1) pc1.close();
		if(pc2) pc2.close();
		pc1 = null;
		pc2 = null;
		if (_stream) {
			_stream.getTracks().forEach(function (track) {
				track.stop();
			});
		}
		_localVideo.srcObject = null;
		_socket.close();
		displayStatus("Finished");
	}

	function copyLink() {
		ClipboardClass.copyText(document.location.href);
	}

	window.addEventListener("beforeunload", hangup);

	// Clipboard polyfill (stupid safari)
	var ClipboardClass = (function () {
		function copyText(text) {
			if (navigator.clipboard && navigator.clipboard.writeText) {
				navigator.clipboard.writeText(text);
				return;
			}

			// Create temp element off-screen to hold text.
			var tempElem = $('<textarea style="position: absolute; top: -8888px; left: -8888px">');
			$("body").append(tempElem);
			tempElem.val(text).select();
			document.execCommand("copy");
			tempElem.remove();
		}
		return {
			copyText: copyText
		};
	})();
</script>




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