*/
// must be run within DokuWiki
if(!defined('DOKU_INC')) die();
if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/');
require_once DOKU_PLUGIN.'syntax.php';
/**
* All DokuWiki plugins to extend the parser/rendering mechanism
* need to inherit from this class
*/
class syntax_plugin_googlepagerank extends DokuWiki_Syntax_Plugin {
function getType() { return 'substition'; }
function getSort() { return 314; }
/**
* settings - host and user agent
*/
public $googlehost = 'toolbarqueries.google.com';
public $googleua = 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.6) Gecko/20060728 Firefox/1.5';
function connectTo($mode) {
$this->Lexer->addSpecialPattern('\{\{pagerank>[^}]*\}\}',$mode,'plugin_googlepagerank');
}
/**
* Handle the match
*/
function handle($match, $state, $pos, &$handler) {
$match = substr($match,11,-2);
list($url,$width,$method) = explode(',',$match);
if ( empty($url)) { $url = "none";}
if ( empty($width)) { $width = 40;}
if ( empty($method)) {$method = "style";}
return array($url,$width,$method);
}
/**
* Create output
*/
function render($mode, &$renderer, $data) {
if($mode == 'xhtml'){
if (!preg_match('/^(http:\/\/)?([^\/]+)/i', $data[0])) { $data[0]='http://'.$data[0]; }
$pr=$this->getpr($data[0]);
if ($pr == '') {$pr = 0;}
$pagerank="PageRank: $pr/10";
//The (old) image method
if ($data[2] == 'image') {
$prpos=$data[1]*$pr/10;
$prneg=$data[1]-$prpos;
$html='
';
}
//The pre-styled method
if ($data[2] == 'style') {
$prpercent=100*$pr/10;
$html='
';
}
$renderer->doc .= ''.$html.'';
return true;
}
return false;
}
/**
* convert a string to a 32-bit integer
*/
function StrToNum($Str, $Check, $Magic) {
$Int32Unit = 4294967296; // 2^32
$length = strlen($Str);
for ($i = 0; $i < $length; $i++) {
$Check *= $Magic;
//If the float is beyond the boundaries of integer (usually +/- 2.15e+9 = 2^31),
// the result of converting to integer is undefined
// refer to http://www.php.net/manual/en/language.types.integer.php
if ($Check >= $Int32Unit) {
$Check = ($Check - $Int32Unit * (int) ($Check / $Int32Unit));
//if the check less than -2^31
$Check = ($Check < -2147483648) ? ($Check + $Int32Unit) : $Check;
}
$Check += ord($Str{$i});
}
return $Check;
}
/**
* genearate a hash for a url
*/
function HashURL($String) {
$Check1 = $this->StrToNum($String, 0x1505, 0x21);
$Check2 = $this->StrToNum($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 | $T2);
}
/**
*genearate a checksum for the hash string
*/
function CheckHash($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.$HashStr;
}
/**
* return the pagerank checksum hash
*/
function getch($url) { return $this->CheckHash($this->HashURL($url)); }
/**
* return the pagerank figure
*/
function getpr($url) {
//global $this->googlehost,$this->googleua;
$ch = $this->getch($url);
$fp = fsockopen($this->googlehost, 80, $errno, $errstr, 30);
if ($fp) {
$out = "GET /tbr?client=navclient-auto&ch=$ch&features=Rank&q=info:$url HTTP/1.1\r\n";
//echo "$out
\n"; //debug only
$out .= "User-Agent: $this->googleua\r\n";
$out .= "Host: $this->googlehost\r\n";
$out .= "Connection: Close\r\n\r\n";
fwrite($fp, $out);
//$pagerank = substr(fgets($fp, 128), 4); //debug only
//echo $pagerank; //debug only
while (!feof($fp)) {
$data = fgets($fp, 128);
//echo $data;
$pos = strpos($data, "Rank_");
if($pos === false){} else{
$pr=substr($data, $pos + 9);
$pr=trim($pr);
$pr=str_replace("\n",'',$pr);
return $pr;
}
}
//else { echo "$errstr ($errno)
\n"; } //debug only
fclose($fp);
}
}
}
?>