var http = require('http');
var spawn = require('child_process').spawn;

http.createServer(onRequest).listen(4000);

function onRequest(request, response)
{
    response.writeHead(200, {'Content-Type' : 'text/plain'});

    var tail_child = spawn('tail', ['-f', '/var/log/system.log']);

    request.connection.on('end', onEnd);
    tail_child.stdout.on('data', onLoadData);

    function onEnd()
    {
        tail_child.kill();
    }

    function onLoadData(data)
    {
        console.log(data.toString());
        response.write(data);
    }
}