JavaScript功能仅匹配Google网址

这是Prestaul答案的更新版本,它解决了我在评论中提到的两个问题.

var GOOGLE_DOMAINS = ([
    '.google.com',
    '.google.ad',
    '.google.ae',
    '.google.com.af',
    '.google.com.ag',
    '.google.com.ai',
    '.google.am',
    '.google.it.ao',
    '.google.com.ar',
    '.google.as',
    '.google.at',
    '.google.com.au',
    '.google.az',
    '.google.ba',
    '.google.com.bd'
]).join('\n');

function isGoogleUrl(url) {
    // get the 2nd level domain from the url
    var domain = /^https?:\/\/[^\///]*(google\.[^\/\\]+)\//i.exec(url);
    if(!domain) return false;

    domain = '.'+domain[1];
    // create a regex to check to see if the domain is supported
    var re = new RegExp('^' + domain.replace(/\./g, '\\.') + '$', 'mi');
    return re.test(GOOGLE_DOMAINS);
}

alert(isGoogleUrl('http://www.google.ba/the/page.html')); // true
alert(isGoogleUrl('http://some_mal_site.com/http://www.google.ba/')); // false
alert(isGoogleUrl('https://google.com.au/')); // true
alert(isGoogleUrl('http://www.google.com.some_mal_site.com/')); // false
alert(isGoogleUrl('http://yahoo.com/')); // false