Web Worker like API to drive NodeJS files
npm install @webreflection/node-worker
The aim of this project is to provide an alternative to Electron environment. This might be particularly useful in those platforms with constrains such Raspberry Pi Zero or 1.
The module is based on the standard Web Worker API.
You can postMessage(data) and receive onmessage = (data) => {} on both client and server.
All workers files must be inside a workers directory within the application folder.
Every worker is a sandboxed VM and it runs on the backend: nothing is shared directly with the browser.
NodeJS
var index = require('fs').readFileSync(__dirname + '/index.html');
var http = require('http').createServer(handler);
var nodeWorker = require('@webreflection/node-worker');
var app = nodeWorker(http);
app.listen(process.env.PORT);
function handler(req, res) {
res.writeHead(200, 'OK', {
'Content-Type': 'text/html'
});
res.end(index);
}Express
var index = require('fs').readFileSync(__dirname + '/index.html');
var express = require('express');
var nodeWorker = require('@webreflection/node-worker');
var app = nodeWorker(express());
app.get('/', handler);
app.listen(process.env.PORT);
function handler(req, res) {
res.writeHead(200, 'OK', {
'Content-Type': 'text/html'
});
res.end(index);
}Demo index.html
<!doctype html>
<!-- socket.io must be available before /node-worker.js -->
<script src="/socket.io/socket.io.js"></script>
<script src="/node-worker.js"></script>
<script>
var nw = new NodeWorker('echo.js');
nw.postMessage({hello: "world"});
nw.onmessage = function (event) {
console.log(event);
};
nw.onerror = function (error) {
console.error(error);
};
</script>workers/echo.js
// simple echo
// when some data arrives
// same data goes back
onmessage = function (e) {
postMessage(e.data);
};You can clone and run npm test after an npm install.