jQuery AJAX (google PageRank)

Posted by RobertPitt on Stack Overflow See other posts from Stack Overflow or by RobertPitt
Published on 2010-06-07T01:34:21Z Indexed on 2010/06/07 1:42 UTC
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pagerank

Hey guys,

I need a little help..

iv'e been developing a Jqery plug-in to get the page ranks of urls on a website using XHR,

The problem is when requesting the rank from google servers the page is returned no content, but if i use an inspector and get the url that was requests and go to it via my browser the pageranks are shown. so it must be something with headers but its just got me puzzled.

Heres some source code but i have removed several aspects that are not needed to review.

pagerank.plugin.js

(
    $.fn.PageRank = function(callback)
    {
        var _library = new Object();

        //Creat the system library
        _library.parseUrl = function(a)
        {
            var b = {};
            var a = a || '';
            /*
                * parse the url to extract its parts
            */
            if (a = a.match(/((s?ftp|https?):\/\/){1}([^\/:]+)?(:([0-9]+))?([^\?#]+)?(\?([^#]+))?(#(.+))?/)) {
                b.scheme    = a[2]  ? a[2]  : "http";
                b.host      = a[3]  ? a[3]  : null;
                b.port      = a[5]  ? a[5]  : null;
                b.path      = a[6]  ? a[6]  : null;
                b.args      = a[8]  ? a[8]  : null;
                b.anchor    = a[10] ? a[10] : null
            }
            return b
        }

        _library.ValidUrl = function(url)
        {
            var b = true;
            return b = url.host === undefined ? false : url.scheme != "http" && url.scheme != "https" ? false : url.host == "localhost" ? false : true
        }

        _library.toHex = function(a){
            return (a < 16 ? "0" : "") + a.toString(16)
        }

        _library.hexEncodeU32 = function(a) {
        }

        _library.generateHash = function(a)
        {
            for (var b = 16909125, c = 0; c < a.length; c++)
            {
            }
            return _library.hexEncodeU32(b)
        }

        var CheckPageRank = function(domain,_call)
        {
            var hash = _library.generateHash(domain);
            $.ajax(
            {
                url: 'http://www.google.com/search?client=navclient-auto&ch=8'+hash+'&features=Rank&q=info:' + escape(domain),
                async: true,
                dataType: 'html',
                ifModified:true,
                contentType:'',
                type:'GET',
                beforeSend:function(xhr)
                {
                    xhr.setRequestHeader('Referer','http://google.com/'); //Set Referer
                },
                success: function(content,textS,xhr){
                    var d = xhr.responseText.substr(9, 2).replace(/\s$/, "");
                    if (d == "" || isNaN(d * 1)) d = "0";
                    _call(d);
                }
            });
        }
        //Return the callback
        $(this).each(function(){
            urlsegments = _library.parseUrl($(this).attr('href'))
            if(_library.ValidUrl(urlsegments))
            {
                CheckPageRank(urlsegments.host,function(rank){
                    alert(rank)
                    callback(rank);
                });
            }
        });
        return this; //Dont break any chain.
    }
)(jQuery);

Index.html (example)

<html>
    <head>
        <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.1/jquery.min.js"></script>
        <script type="text/javascript" src="pagerank.plugin.js"></script>
        <script type="text/javascript">
          $(document).ready(function() {
            $('a').PageRank(function(pr){
                alert(pr);
            })
        });
        </script>
    </head>
    <body>
        <a href="http://facebook.com">a</a>
<a href="http://twitter.com">a</a>
        <div></div>
    </body>
</html>

i just cant understand why its doing this.

Developer IT