screenshotter.js

var page = require('webpage').create();

// for each widget['name'] generate a file with widget['output_file'] as name
var widgets = [
    {
        'name': 'Cloud Summary',
        'output_file': 'cloud_summary.png',
    },
    {
        'name': 'Performance Graph',
        'output_file': 'performance_graph.png',
    },
    {
        'name': 'Server Power State',
        'output_file': 'server_power_state.png',
    },
    {
        'name': 'Servers by Provider',
        'output_file': 'servers_by_provider.png',
    },
]

// cookies
phantom.addCookie({
    'name': 'csrf-token',
    'value': 'cookie-value',
    'domain': '.yourdomain'
})
phantom.addCookie({
    'name': 'global-session',
    'value': 'cookie-value',
    'domain': '.yourdomain'

});

page.open('https://page_to_crawl', function() {
        window.setTimeout(function() {
            widgets.forEach(function(widget) {
                name = widget['name'];
                var query = "[data-module='" + name + "']"
                var clipRect = page.evaluate(function(query) {
                    return document.querySelector(query).getBoundingClientRect();
                }, query);

                page.clipRect = {
                    'top': clipRect.top,
                    'left': clipRect.left,
                    'width': clipRect.width,
                    'height': clipRect.height,
                };

                page.render(widget['output_file']);
            });

            phantom.exit();
        }, 9000);
        });