collabrunner

Node runner for continuously evaluating POSTed js code from collabedit

How this works

1. The node server just listens for text/plain JavaScript code that is sent to it through an HTTP POST and writes it to code.js. CORS allows these to be sent across domains so that this can work from any origin.

2. A grunt watch task listens for changes on code.js, runs that fine, and pipes &> to out.log.

3. server.js watches out.log for changes and uses socket.io to emit the contents to index.html which simply dynamically updates it in a <pre> block.

Server

Run the server locally: node server.js.

Separately start the grunt watch task to run the code everytime it detects changes.

I personally run a localtunnel so that whoever I'm collaborating with can also see the output as well.

Client

Then in collabedit, or some equivalent, collect the code and dispatch it like so:

var start, end, baseurl;

dispatch = function (code) {
	var xhr = new XMLHttpRequest();
	xhr.open('POST', baseurl + '/' + (start ? ('?start='+start+(end ? ('&end='+end) : '')) : ''), true);
	xhr.setRequestHeader('Content-Type', 'text/plain');
	xhr.onreadystatechange = function () {console.dir(arguments);};
	xhr.send(code);
};

// Sample for collabedit
document.getElementById("textarea").onkeyup = function () {
	dispatch(document.getElementById("content_highlight").textContent);
};

start = 0; // first line of desired code (1-indexed)
end = 0; // last line of desired code
baseurl = 'http://localhost:3000';