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Current File : /var/www/web032/htdocs/cms/administrator/components/com_rialto/classes/Akismet.php
<?php
defined('_JEXEC') or die;
/**
 * Akismet anti-comment spam service
 *
 * The class in this package allows use of the {@link http://akismet.com Akismet} anti-comment spam service in any PHP5 application.
 *
 * This service performs a number of checks on submitted data and returns whether or not the data is likely to be spam.
 *
 * Please note that in order to use this class, you must have a vaild {@link http://wordpress.com/api-keys/ WordPress API key}.  They are free for non/small-profit types and getting one will only take a couple of minutes.
 *
 * For commercial use, please {@link http://akismet.com/commercial/ visit the Akismet commercial licensing page}.
 *
 * Please be aware that this class is PHP5 only.  Attempts to run it under PHP4 will most likely fail.
 *
 * See the Akismet class documentation page linked to below for usage information.
 *
 * @package    akismet
 * @author     Alex Potsides, {@link http://www.achingbrain.net http://www.achingbrain.net}
 * @version    0.4
 * @copyright  Alex Potsides, {@link http://www.achingbrain.net http://www.achingbrain.net}
 * @license    http://www.opensource.org/licenses/bsd-license.php BSD License
 *
 * Modified by G S Chapman to suit our email spam checks.
 * Added user agent override and add some extra checks that $_SERVER variables are present.
 * December 2013
 */

/**
 * The Akismet PHP5 Class
 *
 *  This class takes the functionality from the Akismet WordPress plugin written by {@link http://photomatt.net/ Matt Mullenweg} and allows it to be integrated into any PHP5 application or website.
 *
 *  The original plugin is {@link http://akismet.com/download/ available on the Akismet website}.
 *
 *  <b>Usage:</b>
 *  <code>
 *    $akismet = new Akismet('http://www.example.com/blog/', 'aoeu1aoue');
 *    $akismet->setCommentAuthor($name);
 *    $akismet->setCommentAuthorEmail($email);
 *    $akismet->setCommentAuthorURL($url);
 *    $akismet->setCommentContent($comment);
 *    $akismet->setPermalink('http://www.example.com/blog/alex/someurl/');
 *    if($akismet->isCommentSpam())
 *      // store the comment but mark it as spam (in case of a mis-diagnosis)
 *    else
 *      // store the comment normally
 *  </code>
 *
 *  Optionally you may wish to check if your WordPress API key is valid as in the example below.
 *
 * <code>
 *   $akismet = new Akismet('http://www.example.com/blog/', 'aoeu1aoue');
 *
 *   if($akismet->isKeyValid()) {
 *     // api key is okay
 *   } else {
 *     // api key is invalid
 *   }
 * </code>
 *
 * @package akismet
 * @name    Akismet
 * @version 0.4
 *  @author    Alex Potsides
 *  @link      http://www.achingbrain.net/
 */
class Akismet
{
   private $version = '0.4';
   private $wordPressAPIKey;
   private $blogURL;
   private $comment;
   private $apiPort;
   private $akismetServer;
   private $akismetVersion;

   // This prevents some potentially sensitive information from being sent accross the wire.
   private $ignore = array('HTTP_COOKIE',
                     'HTTP_X_FORWARDED_FOR',
                     'HTTP_X_FORWARDED_HOST',
                     'HTTP_MAX_FORWARDS',
                     'HTTP_X_FORWARDED_SERVER',
                     'REDIRECT_STATUS',
                     'SERVER_PORT',
                     'PATH',
                     'DOCUMENT_ROOT',
                     'SERVER_ADMIN',
                     'QUERY_STRING',
                     'PHP_SELF' );

   /**
    * @param   string   $blogURL       The URL of your blog.
    * @param   string   $wordPressAPIKey  WordPress API key.
    */
   public function __construct($blogURL, $wordPressAPIKey) {
      $this->blogURL = $blogURL;
      $this->wordPressAPIKey = $wordPressAPIKey;

      // Set some default values
      $this->apiPort = 80;
      $this->akismetServer = 'rest.akismet.com';
      $this->akismetVersion = '1.1';

      // Start to populate the comment data
      $this->comment['blog'] = $blogURL;
      if(isset($_SERVER['HTTP_USER_AGENT'])) {             // GSC added to check email.
         $this->comment['user_agent'] = $_SERVER['HTTP_USER_AGENT'];
      }

      if(isset($_SERVER['HTTP_REFERER'])) {
         $this->comment['referrer'] = $_SERVER['HTTP_REFERER'];
      }

      /*
       * This is necessary if the server PHP5 is running on has been set up to run PHP4 and
       * PHP5 concurently and is actually running through a separate proxy al a these instructions:
       * http://www.schlitt.info/applications/blog/archives/83_How_to_run_PHP4_and_PHP_5_parallel.html
       * and http://wiki.coggeshall.org/37.html
       * Otherwise the user_ip appears as the IP address of the PHP4 server passing the requests to the
       * PHP5 one...
       */
      if(isset($_SERVER['REMOTE_ADDR'])) {        // GSC Added to check email.
         $this->comment['user_ip'] = $_SERVER['REMOTE_ADDR'] != getenv('SERVER_ADDR') ? $_SERVER['REMOTE_ADDR'] : getenv('HTTP_X_FORWARDED_FOR');
      }
   }

   /**
    * Makes a request to the Akismet service to see if the API key passed to the constructor is valid.
    *
    * Use this method if you suspect your API key is invalid.
    *
    * @return bool   True is if the key is valid, false if not.
    */
   public function isKeyValid() {
      // Check to see if the key is valid
      $response = $this->sendRequest('key=' . $this->wordPressAPIKey . '&blog=' . $this->blogURL, $this->akismetServer, '/' . $this->akismetVersion . '/verify-key');
      return $response[1] == 'valid';
   }

   // makes a request to the Akismet service
   /**
    * @param $request
    * @param $host
    * @param $path
    * @return array
    */
   private function sendRequest($request, $host, $path) {
      $http_request  = "POST " . $path . " HTTP/1.0\r\n";
      $http_request .= "Host: " . $host . "\r\n";
      $http_request .= "Content-Type: application/x-www-form-urlencoded; charset=utf-8\r\n";
      $http_request .= "Content-Length: " . strlen($request) . "\r\n";
      $http_request .= "User-Agent: Akismet PHP5 Class " . $this->version . " | Akismet/1.11\r\n";
      $http_request .= "\r\n";
      $http_request .= $request;

      $socketWriteRead = new SocketWriteRead($host, $this->apiPort, $http_request);
      $socketWriteRead->send();

      return explode("\r\n\r\n", $socketWriteRead->getResponse(), 2);
   }

   // Formats the data for transmission
   /**
    * @return string
    */
   private function getQueryString() {
      foreach($_SERVER as $key => $value) {
         if(!in_array($key, $this->ignore)) {
            if($key == 'REMOTE_ADDR') {
               $this->comment[$key] = $this->comment['user_ip'];
            } else {
               $this->comment[$key] = $value;
            }
         }
      }

      $query_string = '';

      foreach($this->comment as $key => $data) {
         if(!is_array($data)) {
            $query_string .= $key . '=' . urlencode(stripslashes($data)) . '&';
         }
      }

      return $query_string;
   }

    /**
     *    Tests for spam.
     *
     *    Uses the web service provided by {@link http://www.akismet.com Akismet} to see whether or not the submitted comment is spam.  Returns a boolean value.
     *
     * @throws exception
     * @return        bool    True if the comment is spam, false if not
     */
   public function isCommentSpam() {
      $response = $this->sendRequest($this->getQueryString(), $this->wordPressAPIKey . '.rest.akismet.com', '/' . $this->akismetVersion . '/comment-check');

      if($response[1] == 'invalid' && !$this->isKeyValid()) {
         throw new exception('The Wordpress API key passed to the Akismet constructor is invalid.  Please obtain a valid one from http://wordpress.com/api-keys/');
      }

      return ($response[1] == 'true');
   }

   /**
    * Submit spam that is incorrectly tagged as ham.
    *
    * Using this function will make you a good citizen as it helps Akismet to learn from its mistakes.  This will improve the service for everybody.
    */
   public function submitSpam() {
      $this->sendRequest($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-spam');
   }

   /**
    * Submit ham that is incorrectly tagged as spam.
    *
    * Using this function will make you a good citizen as it helps Akismet to learn from its mistakes.  This will improve the service for everybody.
    */
   public function submitHam() {
      $this->sendRequest($this->getQueryString(), $this->wordPressAPIKey . '.' . $this->akismetServer, '/' . $this->akismetVersion . '/submit-ham');
   }

   /**
    * To override the references field when submitting spam/ham later on
    *
    * @param string $references   An IP address.  Optional.
    */
   public function setReferences($references) {
      // $this->comment['references'] = $references;
   }

   /**
    * To override the in_reply_to field when submitting spam/ham later on
    *
    * @param string $in_reply_to   An IP address.  Optional.
    */
   public function setInreplyto($in_reply_to) {
      // $this->comment['in_reply_to'] = $in_reply_to;
   }

   /**
    * To override the user IP address when submitting spam/ham later on
    *
    * @param string $userip   An IP address.  Optional.
    */
   public function setUserIP($userip) {
      $this->comment['user_ip'] = $userip;
   }

   /**
    * To override the user agent when submitting spam/ham later on
    *
    * @param string $useragent   A User agent.  Optional.
    */
   public function setUserAgent($useragent) {
      $this->comment['user_agent'] = $useragent;
   }

   /**
    * To override the referring page when submitting spam/ham later on
    *
    * @param string $referrer The referring page.  Optional.
    */
   public function setReferrer($referrer) {
      $this->comment['referrer'] = $referrer;
   }

   /**
    * A permanent URL referencing the blog post the comment was submitted to.
    *
    * @param string $permalink   The URL.  Optional.
    */
   public function setPermalink($permalink) {
      $this->comment['permalink'] = $permalink;
   }

   /**
    * The type of comment being submitted.
    *
    * May be blank, comment, trackback, pingback, or a made up value like "registration" or "wiki".
    * @param $commentType
    */
   public function setCommentType($commentType) {
      $this->comment['comment_type'] = $commentType;
   }

   /**
    * The name that the author submitted with the comment.
    * @param $commentAuthor
    */
   public function setCommentAuthor($commentAuthor) {
      $this->comment['comment_author'] = $commentAuthor;
   }

   /**
    * The email address that the author submitted with the comment.
    *
    * The address is assumed to be valid.
    * @param $authorEmail
    */
   public function setCommentAuthorEmail($authorEmail) {
      $this->comment['comment_author_email'] = $authorEmail;
   }

   /**
    * The URL that the author submitted with the comment.
    * @param $authorURL
    */
   public function setCommentAuthorURL($authorURL) {
      $this->comment['comment_author_url'] = $authorURL;
   }

   /**
    * The comment's body text.
    * @param $commentBody
    */
   public function setCommentContent($commentBody) {
      $this->comment['comment_content'] = $commentBody;
   }

   /**
    * Defaults to 80
    * @param $apiPort
    */
   public function setAPIPort($apiPort) {
      $this->apiPort = $apiPort;
   }

   /**
    * Defaults to rest.akismet.com
    * @param $akismetServer
    */
   public function setAkismetServer($akismetServer) {
      $this->akismetServer = $akismetServer;
   }

   /**
    * Defaults to '1.1'
    * @param $akismetVersion
    */
   public function setAkismetVersion($akismetVersion) {
      $this->akismetVersion = $akismetVersion;
   }
}

/**
 * Utility class used by Akismet
 *
 *  This class is used by Akismet to do the actual sending and receiving of data.  It opens a connection to a remote host, sends some data and the reads the response and makes it available to the calling program.
 *
 *  The code that makes up this class originates in the Akismet WordPress plugin, which is {@link http://akismet.com/download/ available on the Akismet website}.
 *
 * N.B. It is not necessary to call this class directly to use the Akismet class.  This is included here mainly out of a sense of completeness.
 *
 * @package akismet
 * @name    SocketWriteRead
 * @version 0.1
 *  @author    Alex Potsides
 *  @link      http://www.achingbrain.net/
 */
class SocketWriteRead
{
   private $host;
   private $port;
   private $request;
   private $response;
   private $responseLength;
   private $errorNumber;
   private $errorString;

   /**
    * @param   string   $host       The host to send/receive data.
    * @param   int      $port       The port on the remote host.
    * @param   string   $request    The data to send.
    * @param   int      $responseLength   The amount of data to read.  Defaults to 1160 bytes.
    */
   public function __construct($host, $port, $request, $responseLength = 1160) {
      $this->host = $host;
      $this->port = $port;
      $this->request = $request;
      $this->responseLength = $responseLength;
      $this->errorNumber = 0;
      $this->errorString = '';
   }

   /**
    *  Sends the data to the remote host.
    *
    * @throws  Exception
    * @exception 'Error connecting to host: ' An exception is thrown if a connection cannot be made to the remote host.
    */
   public function send() {
      $this->response = '';

      $fs = fsockopen($this->host, $this->port, $this->errorNumber, $this->errorString, 3);

      if($this->errorNumber != 0) {
         throw new Exception('Error connecting to host: ' . $this->host . ' Error number: ' . $this->errorNumber . ' Error message: ' . $this->errorString);
      }

      if($fs !== false) {
         @fwrite($fs, $this->request);

         while(!feof($fs)) {
            $this->response .= fgets($fs, $this->responseLength);
         }

         fclose($fs);
      }
   }

   /**
    *  Returns the server response text
    *
    *  @return string
    */
   public function getResponse() {
      return $this->response;
   }

   /**
    * Returns the error number
    *
    * If there was no error, 0 will be returned.
    *
    * @return int
    */
   public function getErrorNumber() {
      return $this->errorNumber;
   }

   /**
    * Returns the error string
    *
    * If there was no error, an empty string will be returned.
    *
    * @return string
    */
   public function getErrorString() {
      return $this->errorString;
   }
}

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