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inspector-example.js
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inspector-example.js
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'use strict';
let WebSocket = require('ws');
let ivm = require('./isolated-vm');
/**
* IMPORTANT: Allowing untrusted users to access the v8 inspector will almost certainly result in a
* security vulnerability. Access to these endpoints should be restricted.
*/
// Launch an infinite loop in another thread
let isolate = new ivm.Isolate({ inspector: true });
(async function() {
let context = await isolate.createContext({ inspector: true });
let script = await isolate.compileScript('for(;;)debugger;', { filename: 'example.js' });
await script.run(context);
}()).catch(console.error);
// Create an inspector channel on port 10000
let wss = new WebSocket.Server({ port: 10000 });
wss.on('connection', function(ws) {
// Dispose inspector session on websocket disconnect
let channel = isolate.createInspectorSession();
function dispose() {
try {
channel.dispose();
} catch (err) {}
}
ws.on('error', dispose);
ws.on('close', dispose);
// Relay messages from frontend to backend
ws.on('message', function(message) {
try {
channel.dispatchProtocolMessage(message);
} catch (err) {
// This happens if inspector session was closed unexpectedly
ws.close();
}
});
// Relay messages from backend to frontend
function send(message) {
try {
ws.send(message);
} catch (err) {
dispose();
}
}
channel.onResponse = (callId, message) => send(message);
channel.onNotification = send;
});
console.log('Inspector: chrome-devtools://devtools/bundled/inspector.html?experiments=true&v8only=true&ws=127.0.0.1:10000');