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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" >
< meta property = "og:title" content = "WebVM - Linux virtualization in WebAssembly" / >
< meta property = "og:type" content = "website" / >
< meta property = "og:site_name" content = "WebVM" / >
< meta property = "og:image" content = "https://webvm.io/assets/social.png" / >
< meta name = "twitter:card" content = "summary_large_image" / >
< meta name = "twitter:site" content = "@leaningtech" / >
< meta name = "twitter:title" content = "WebVM - Linux virtualization in WebAssembly" / >
< 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." >
< meta name = "twitter:image" content = "https://webvm.io/assets/social.png" / >
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< meta name = "application-name" content = "WebVM" / >
< meta name = "apple-mobile-web-app-title" content = "WebVM" / >
< meta name = "apple-mobile-web-app-capable" content = "yes" / >
< meta name = "mobile-web-app-capable" content = "yes" / >
< meta name = "apple-mobile-web-app-status-bar-style" content = "black" / >
< link rel = "shortcut icon" href = "./tower.ico" >
< link rel = "preconnect" href = "https://fonts.googleapis.com" >
< link rel = "preconnect" href = "https://fonts.gstatic.com" crossorigin >
< link rel = "stylesheet" id = "us-fonts-css" href = "https://fonts.googleapis.com/css?family=Montserrat%3A300%2C400%2C500%2C600%2C700&display=swap&ver=6.0.2" media = "all" >
< link rel = "stylesheet" href = "https://cdnjs.cloudflare.com/ajax/libs/github-fork-ribbon-css/0.2.3/gh-fork-ribbon.min.css" / >
< link rel = "stylesheet" href = "./xterm/xterm.css" / >
< link rel = "stylesheet" href = "./scrollbar.css" / >
< style > . github-fork-ribbon : before { background-color : #ea1e69 ; } < / style >
<!-- Serviceworker script that adds the COI and CORS headers to the response headers in cases where the server does not support it. -->
< script src = "serviceWorker.js" > < / script >
< script src = "./xterm/xterm.js" > < / script >
< script src = "./xterm/xterm-addon-fit.js" > < / script >
< script src = "./xterm/xterm-addon-web-links.js" > < / script >
< script src = "network.js" > < / script >
< / head >
< body style = "margin:0;height:100%;background:black;color:white;overflow:hidden; display:flex; flex-direction: column; justify-content: space-between; height: 100%;" >
< 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 >
< div >
< div style = "padding-top: 0.7em;padding-bottom: 0.7em;font-size: 0.3em; font-weight: 200;vertical-align:center;height: 120px;" >
< div style = "margin-left: 20px; height: 100%; display: flex; align-items: center; justify-content: space-between;" >
< 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;" >
< div style = "padding-top: 0.7em;font-size: 0.3em; font-weight: 200;vertical-align:center;height:50px;" >
< div style = "margin-right: 10px; margin-left: 20px; height: 100%; display: flex; align-items: center; justify-content: flex-end;gap: 50px;" >
< div style = "padding-top: 0.7em;font-size: 0.3em; font-weight: 200;vertical-align:center;" >
< a href = "https://leaningtech.com" style = "text-decoration: none; height: 100%;" target = "_blank" >
< div style = "color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;" >
< span > Made with ❤ ️ by < / span >
< img src = "assets/leaningtech.png" height = "40px" style = "margin-left: 5px;" >
< / div >
< / a >
< / div >
< / div >
< / div >
< div style = "padding-top: 0.7em;font-size: 0.3em; font-weight: 200;vertical-align:center;height:50px;" >
< div style = "margin-right: 10px; margin-left: 20px; height: 100%; display: flex; align-items: center; justify-content: flex-end;gap: 50px;" >
< 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;" > 🟢 < / 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;" > 🟢 < / 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 >
< / div >
< img src = "assets/tailscale.svg" height = "35px" style = "margin-left: 7px;" >
< / div >
< / a >
< a href = "https://discord.gg/yTNZgySKGa" style = "text-decoration: none; height: 100%;" target = "_blank" >
< div style = "color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;" >
< span > Join Discord < / span >
< img src = "assets/discord-mark-blue.svg" height = "35px" style = "margin-left: 7px;" >
< / div >
< / a >
< a href = "https://github.com/leaningtech/webvm/issues" style = "text-decoration: none; height: 100%;" target = "_blank" >
< div style = "color: white; font-family: montserrat; font-weight: 400; font-size: large; height: 100%; display: flex; align-items: center;" >
< span > GitHub Issues < / span >
< img src = "assets/github-mark-white.svg" height = "35px" style = "margin-left: 5px;" >
< / div >
< / a >
< / div >
< / div >
< / div >
< / div >
< / div >
< / div >
< div style = "flex-grow:0; flex-shrink: 0; height:1px; width: 100%; background-color: white;" >
< / 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 >
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< canvas id = "canvas" > < / canvas >
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< / 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;
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function writeData(buf, vt)
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{
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// Unsure why the output is not sent to vt 0
if(vt != 1)
return;
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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}";
}
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//Actual CheerpX and init specific logic
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async function runInit()
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{
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);
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const canvas = document.getElementById("canvas");
cx.setKmsCanvas(canvas, 1024, 768);
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var opts = {uid: 0, git: 0};
cx.run("/sbin/init", [], opts);
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}
function failCallback(err)
{
printOnTerm.printError(printOnTerm.getErrorMessage(err));
}
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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();
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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);
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}
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
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var r = await fetch("https://cheerpxdemos.leaningtech.com/publicdeploy/LATEST.txt");
var url = await r.text();
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url = url.trim();
var script = document.createElement('script');
script.type = 'text/javascript';
script.src = url;
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script.addEventListener("load", runInit, false);
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document.head.appendChild(script);
}
loadCX();
< / script >
< / body >
< / html >