openurlwithproxy.js

var page = require('webpage').create(),
    system = require('system'),
    host, port, address;

if (system.args.length < 4) {
    console.log('Usage: openurlwithproxy.js <proxyHost> <proxyPort> <URL>');
    phantom.exit(1);
} else {
    host = system.args[1];
    port = system.args[2];
    address = system.args[3];
    phantom.setProxy(host, port, 'manual', '', '');
    page.open(address, function (status) {
        if (status !== 'success') {
            console.log('FAIL to load the address "' + 
                address + '" using proxy "' + host + ':' + port + '"');
        } else {
            console.log('Page title is ' + page.evaluate(function () {
                return document.title;
            }));
        }
        phantom.exit();
    });
}