Pagerank Retrieval

herron

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Does anyone know of an updated script (any language) that retrieves the Google PageRank? Everything I have found online is before the latest update which seemed to have rendered the last method useless.
 
I dunno if this works, and even if it does I suspect Google will block your IP if you overuse it:

http://www.pagerankcode.com/download-script.html
 
Nah, I am aware of that script (and many that use the same technique) but it unfortunately doesn't work for all urls now. I have read that the method that script uses was changed around Sept 2009.

I realise the IP situation but that is avoidable. All of the Firefox extensions and Keyword Tools like Market Samurai are still doing it, I just have to work out how :p
 
I've got the same problem right now. I'm considering writing a scraper to collect seo4firefox data, but that seems pretty ghetto.
 
Grazor, I think I got it working. I found the solution in this awesome piece of open source software - http://sourceforge.net/projects/seopanel/

You will find the functions for calculating the checksum in seopanel/controllers/rank.ctrl.php

I will check it properly tonight but it was returning PR for pages that were returning N/A in the previous code.

That software has a heap of features for any SEO scripts you need to write.
 
Please don't pick on my dodgy code hehe.

Code:
<?php

function getPageRank($url){
    $pagerank = -1;
    $fp = fsockopen("www.google.com", 80, $errno, $errstr, 30);
    if($fp){
      $out = "GET /search?client=navclient-auto&ch=".CheckHash(hashURL($url))."&features=Rank&q=info:".$url."&num=100&filter=0 HTTP/1.1\r\n";
      $out .= "Host: www.google.com\r\n";
      $out .= "Connection: Close\r\n\r\n";
      fwrite($fp, $out);
      while (!feof($fp)){
        $data = fgets($fp, 128);
        $pos = strpos($data, "Rank_");
        if($pos === false){
        }else
          $pagerank = substr($data, $pos + 9);
      }
      fclose($fp);
    }
    return $pagerank;
}
function strToNum($Str, $Check, $Magic) 
{
    $Int32Unit = 4294967296;
    $length = strlen($Str);
    for ($i = 0; $i < $length; $i++) {
        $Check *= $Magic;
        if ($Check >= $Int32Unit) {
            $Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
            $Check = ($Check < -2147483648)? ($Check + $Int32Unit) : $Check;
        }
        $Check += ord($Str{$i});
    }
    return $Check;
}

function hashURL($String) 
{
    $Check1 = strToNum($String, 0x1505, 0x21);
    $Check2 = strToNum($String, 0, 0x1003F);

    $Check1 >>= 2;
    $Check1 = (($Check1 >> 4) & 0x3FFFFC0 ) | ($Check1 & 0x3F);
    $Check1 = (($Check1 >> 4) & 0x3FFC00 ) | ($Check1 & 0x3FF);
    $Check1 = (($Check1 >> 4) & 0x3C000 ) | ($Check1 & 0x3FFF);

    $T1 = (((($Check1 & 0x3C0) << 4) | ($Check1 & 0x3C)) <<2 ) | ($Check2 & 0xF0F );
    $T2 = (((($Check1 & 0xFFFFC000) << 4) | ($Check1 & 0x3C00)) << 0xA) | ($Check2 & 0xF0F0000 );

    return ($T1 | $T2);
}

function checkHash($Hashnum) {
    $CheckByte = 0;
    $Flag = 0;

    $HashStr = sprintf('%u', $Hashnum) ;
    $length = strlen($HashStr);

    for ($i = $length - 1; $i >= 0; $i --) {
        $Re = $HashStr{$i};
        if (1 === ($Flag % 2)) {
            $Re += $Re;
            $Re = (int)($Re / 10) + ($Re % 10);
        }
        $CheckByte += $Re;
        $Flag ++;
    }

    $CheckByte %= 10;
    if (0!== $CheckByte) {
        $CheckByte = 10 - $CheckByte;
        if (1 === ($Flag % 2) ) {
            if (1 === ($CheckByte % 2)) {$CheckByte += 9;}
            $CheckByte >>= 1;
        }
    }

    return '7'.$CheckByte.$HashStr;}

    
    
    echo 'Testing Pagerank<br>';
    echo '-----------------------------<br>';
    $site = 'http://www.google.com';    
    $pageRank = getPageRank($site);
    echo 'PR: ' . $pageRank;
?>
 
Hey Herron, thanks for the code, I'll take a look at it tomorrow.
 
There's a ruby version you can run from the command line here: http://snippets.dzone.com/posts/show/3284
 
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