node/test/parallel/test-worker-message-port-transfer-fake-js-transferable-internal.js
Anna Henningsen e1ad548cd4
worker: emit 'messagerror' events for failed deserialization
This is much nicer than just treating exceptions as uncaught, and
enables reporting of exceptions from the internal C++ deserialization
machinery.

PR-URL: https://github.com/nodejs/node/pull/33772
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
2020-06-14 14:53:40 +02:00

34 lines
1.1 KiB
JavaScript

'use strict';
const common = require('../common');
const assert = require('assert');
const fs = require('fs').promises;
const { MessageChannel } = require('worker_threads');
const { once } = require('events');
// Test that overriding the internal kTransfer method of a JSTransferable does
// not enable loading arbitrary code from internal Node.js core modules.
(async function() {
const fh = await fs.open(__filename);
assert.strictEqual(fh.constructor.name, 'FileHandle');
const kTransfer = Object.getOwnPropertySymbols(Object.getPrototypeOf(fh))
.filter((symbol) => symbol.description === 'messaging_transfer_symbol')[0];
assert.strictEqual(typeof kTransfer, 'symbol');
fh[kTransfer] = () => {
return {
data: '✨',
deserializeInfo: 'net:Socket'
};
};
const { port1, port2 } = new MessageChannel();
port1.postMessage(fh, [ fh ]);
port2.on('message', common.mustNotCall());
const [ exception ] = await once(port2, 'messageerror');
assert.strictEqual(exception.message, 'Unknown deserialize spec net:Socket');
port2.close();
})().then(common.mustCall());