fouber/pmui

mkdir page-monitor
cd page-monitor

vim package.json

{
  "name": "my-monitor",
  "description": "monitor www.google.com",
  "version": "0.0.1",
  "private": true,
  "dependencies": {
    "pmui": "*",
    "page-monitor": "*"
  }
}

npm install

vim app.js

var app = require('pmui');

app.set('port', process.env.PORT || 8894);

// app.set('page monitor root', process.cwd());   // path to save captures
// app.set('page monitor ext', 'jpg');            // screenshot format
// app.set('page monitor title', 'Page Monitor'); // page title

var cluster = require('cluster'),
    os = require('os'),
    cpuCount = os.cpus().length,
    logger = app.get('logger') || console;

if (cluster.isMaster) {
    for (var i = 0; i < cpuCount; i++) cluster.fork();
    cluster.on('exit', function (worker) {
        logger.error('Worker ' + worker.id + 'died :(');
        cluster.fork();
    });
} else {
    app.listen(app.get('port'), function () {
        logger.log('[%s] Express server listening on port %d',
            app.get('env').toUpperCase(), app.get('port'));
    });
}

node app.js

vim www.google.com.js

var Monitor = require('page-monitor');
var url = 'http://www.google.com/';
var opt = { /* see https://github.com/fouber/page-monitor#monitor */ };
var monitor = new Monitor(url, opt);
monitor.on('debug', function (data) {
    console.log('[DEBUG] ' + data);
});
monitor.on('error', function (data) {
    console.error('[ERROR] ' + data);
});

monitor.capture(function (code) {
    console.log('[DONE ] ' + (new Date));
});

node www.google.com

forever start --spinSleepTime 60000 www.google.com.js

npm update