baaw

compute on the client side

Installation

npm install baaw --save

What is it?

baaw is a small library on top of socket.io that allows delegating work to the remote browsers in few small steps (working example):

Initialize baaw with socket.io instance and socket.io client library url (server side)

  var baaw = require('baaw')(io, 'http://127.0.0.1:9999/socket.io/socket.io.js');

Host baaw init script, for example with express (server side):

  app
    .get('/script', function (req, res) {
      res.setHeader('content-type', 'text/javascript');
      res.send(baaw.script.content);
    });

Add this script tag to some page (client side)

  <script src="http://127.0.0.1:9999/script" type="text/javascript"></script>

Delegate some work (server side)

  baaw.on('new', function (worker) {
    // New worker (browser) connected

    var executor = function (color, manager) {
      // Below code will be executed in browser
      document.body.style.background = 'red';
      jobManager.sendResult('I\'ve change background color!');
    }

    // Data passed to executor
    var data = 'red';

    var onDone = function (result) {
      // Below code will be excuted in node after sending result from browser
      console.log('Browsers result:', result);
    };

    worker.work(executor, data, onDone);
  });

API

baaw(io, url)

• io - socket.io instance
• url - url where socket.io will host client side library

Events:

• new - new browser connected, callback gets worker (an instance of BrowserWorker) as a first argument

BrowserWorker

work(executor, data, onDone)

delegate some work to browser

• executor(data, manager) - function that will be executed in browser,
• data - data that will be passed as first argument to executor
• onDone(result) - function that will be executed on server side when browser will finish execution

JobManager

JobManager instance is passed to executor function as a second argument. It's used to send result to server.

• sendResult(result) - send result back to server, after that onDone will be called with result.