0ct0pu5
/
webvm


			
				
					
						
						
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    <title>WebVM - Linux virtualization in WebAssembly</title>

    <meta name="description" content="Server-less virtual machine, networking included, running browser-side in HTML5/WebAssembly. Code in any programming language inside this Linux terminal.">
    <meta name="keywords" content="WebVM, Virtual Machine, CheerpX, x86 virtualization, WebAssembly, Tailscale, JIT">
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    <meta name="twitter:description" content="Server-less virtual machine, networking included, running browser-side in HTML5/WebAssembly. Code in any programming language inside this Linux terminal.">
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    <script src="network.js"></script>
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    <a class="github-fork-ribbon right-bottom" href="https://github.com/leaningtech/webvm/" target="_blank" data-ribbon="Fork me on GitHub" title="Fork me on GitHub">Fork me on GitHub</a>
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          <pre style="font-family: monospace; font-weight: 600; font-size: large; color: #ad7fa8;">

__      __   _  __   ____  __
\ \    / /__| |_\ \ / /  \/  |
 \ \/\/ / -_) '_ \ V /| |\/| |
  \_/\_/\___|_.__/\_/ |_|  |_|
          </pre>
          <div style="height:100%;display: flex; flex-direction: column;justify-content: space-between;">
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                      <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
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                        <img src="assets/leaningtech.png" height="40px" style="margin-left: 5px;">
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                <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                  <span>CPU </span>
                  <span id="cpuactivity" style="margin-left: 7px;">&#x1F7E2;</span>
                </div>
                <div style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                  <span>HDD </span>
                  <span id="hddactivity" style="margin-left: 7px;">&#x1F7E2;</span>
                </div>
		<a id="loginLink" style="user-select: text ;text-decoration: none; height: 100%;">
		  <div  style="color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;">
                    <div style="position: relative;">
	              <span style="cursor: pointer" id="networkStatus">Connect via Tailscale </span>
	              <span style="cursor: pointer; position: absolute; right: 0px; visibility: hidden;" id="ipCopied">Copied! </span>
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    </div>
    <main style="display: flex; flex-direction: row; justify-content: space-between; margin: 5px; height: 100%;">
      <div style="flex-grow:1; height:100%;display:inline-block;margin:0;" class="scrollbar" id="console">
      </div>
      <canvas id="canvas"></canvas>
    </main>
    <script>

	//Utility namespace to group all functionality related to printing (both error and non error) messages
	const color= "\x1b[1;35m";
	const bold= "\x1b[1;37m";
	const underline= "\x1b[94;4m";
	const normal= "\x1b[0m";
	var printOnTerm = {
		getSharedArrayBufferMissingMessage: function ()
		{
			const isCustom = window.location.hostname !== "webvm.io";
			const isSecureContext = window.isSecureContext;
			const text = [
				"",
				"",
				color + "CheerpX could not start" + normal,
				"",
				"CheerpX uses SharedArrayBuffer, which is not available right now.",
				"",
				!isSecureContext && "  -  This page is not in a secure context. Serve over HTTPS or WSS.",
				!isSecureContext && "    " + underline + "https://developer.mozilla.org/en-US/docs/Web/Security/Secure_Contexts" + normal,
				isCustom && "  -  The document is not cross-origin isolated.",
				isCustom && "     " + underline + "https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/SharedArrayBuffer#security_requirements" + normal, 
				"  - Your browser might not support SharedArrayBuffer.",
				"    Since 2022, all major browsers support this feature.",
				"    " + underline + "https://caniuse.com/sharedarraybuffer" + normal,
			].filter(Boolean);

			return text;
		},
		getErrorMessage: function (error_message)
		{
			const text = [
				"",
				"",
				color + "CheerpX could not start" + normal,
				"",
				"CheerpX internal error message is:",
				error_message,
				"",
				"",
				"CheerpX is expected to work with recent desktop versions of Chrome, Edge, Firefox and Safari",
				"",
				"",
				"Give it a try from a desktop version / another browser!",
				]

			return text;
		},
		printMessage: function (text) {
			for (var i=0; i<text.length; i++)
			{
				term.write(text[i]);
				term.write('\n');
			}
		},
		printError: function (message)
		{
			this.printMessage(message);

			term.write("\n\n");

			function writeCustom(something)
			{
				term.write(something);
			}
		},
	};

	var consoleDiv = document.getElementById("console");

	//xterm.js related logic
	var term = new Terminal({cursorBlink:true,convertEol:true, fontFamily:"monospace", fontWeight: 400, fontWeightBold: 700});
	var fitAddon = new FitAddon.FitAddon();
	term.loadAddon(fitAddon);
	var linkAddon = new WebLinksAddon.WebLinksAddon();
	term.loadAddon(linkAddon);
	term.open(consoleDiv);
	term.scrollToTop();

	fitAddon.fit();
	window.addEventListener("resize", function(ev){fitAddon.fit();}, false);
	term.focus();
	var cxReadFunc = null;
	function writeData(buf, vt)
	{
		// Unsure why the output is not sent to vt 0
		if(vt != 1)
			return;
		term.write(new Uint8Array(buf));
	}
	function readData(str)
	{
		if(cxReadFunc == null)
			return;
		for(var i=0;i<str.length;i++)
			cxReadFunc(str.charCodeAt(i));
	}
	term.onData(readData);

	function hddCallback(state)
	{
		var h = document.getElementById("hddactivity");
		if(state == "ready")
			h.textContent = "\u{1F7E2}";
		else
			h.textContent = "\u{1F7E0}";
	}
	function cpuCallback(state)
	{
		var h = document.getElementById("cpuactivity");
		if(state == "ready")
			h.textContent = "\u{1F7E2}";
		else
			h.textContent = "\u{1F7E0}";
	}

	//Actual CheerpX and init specific logic
	async function runInit()
	{
		if (typeof SharedArrayBuffer === "undefined")
		{
			printOnTerm.printError(printOnTerm.getSharedArrayBufferMissingMessage());
			return;
		}

		let networkInterface = setupNetworkInterface();

		async function runTest(cx)
		{
			cx.registerCallback("cpuActivity", cpuCallback);
			cx.registerCallback("diskActivity", hddCallback);
			registerNetworkLogin(cx, networkInterface);

			term.scrollToBottom();

			cxReadFunc = cx.setCustomConsole(writeData, term.cols, term.rows);

			function preventDefaults (e) {
				e.preventDefault()
				e.stopPropagation()
			}
			consoleDiv.addEventListener("dragover", preventDefaults, false);
			consoleDiv.addEventListener("dragenter", preventDefaults, false);
			consoleDiv.addEventListener("dragleave", preventDefaults, false);
			consoleDiv.addEventListener("drop", preventDefaults, false);
			const canvas = document.getElementById("canvas");
			cx.setKmsCanvas(canvas, 1024, 768);

			var opts = {uid: 0, git: 0};
			cx.run("/sbin/init", [], opts);
		}
		function failCallback(err)
		{
			printOnTerm.printError(printOnTerm.getErrorMessage(err));
		}
		var params = new URLSearchParams(location.search);
		var protocol = params.get("setProtocol");
		if(!protocol)
			protocol = "https:";
		var blockDevice = await CheerpX.CloudDevice.create(protocol + "//disks-staging.webvm.io/alpine_20240307_i3_slimmed.ext2");
		var overlayDevice = await CheerpX.OverlayDevice.create(blockDevice, await CheerpX.IDBDevice.create("block2"));
		var webDevice = await CheerpX.WebDevice.create("");
		var dataDevice = await CheerpX.DataDevice.create();
		CheerpX.Linux.create({mounts:[{type:"ext2",dev:overlayDevice,path:"/"},{type:"dir",dev:webDevice,path:"/app"},{type:"dir",dev:dataDevice,path:"/data"},{type:"devs",path:"/dev"},{type:"proc",path:"/proc"}], networkInterface: networkInterface}).then(runTest, failCallback);
	}
	function initialMessage()
	{
		console.log("Welcome. We appreciate curiosity, but be warned that keeping the DevTools open causes significant performance degradation and crashes.");
	}
	initialMessage();
	async function loadCX()
	{
		// Find the latest build
		var r = await fetch("https://cheerpxdemos.leaningtech.com/publicdeploy/LATEST.txt");
		var url = await r.text();
		url = url.trim();
		var script = document.createElement('script');
		script.type = 'text/javascript';
		script.src = url;
		script.addEventListener("load", runInit, false);
		document.head.appendChild(script);
	}
	loadCX();
    </script>
  </body>
</html>