<?php

/**

 * Laconica, the distributed open-source microblogging tool

 *

 * Plugin to check submitted notices with Mollom

 *

 * PHP version 5

 *

 * LICENCE: This program is free software: you can redistribute it and/or modify

 * it under the terms of the GNU Affero General Public License as published by

 * the Free Software Foundation, either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU Affero General Public License for more details.

 *

 * You should have received a copy of the GNU Affero General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * Mollom is a bayesian spam checker, wrapped into a webservice

 * This plugin is based on the Drupal Mollom module

 *

 * @category  Plugin

 * @package   Laconica

 * @author    Brenda Wallace <brenda@cpan.org>

 * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0

 *

 */

if (!defined('LACONICA')) {

    exit(1);

}

define('MOLLOMPLUGIN_VERSION', '0.1');

define('MOLLOM_API_VERSION', '1.0');

define('MOLLOM_ANALYSIS_UNKNOWN' , 0);

define('MOLLOM_ANALYSIS_HAM'     , 1);

define('MOLLOM_ANALYSIS_SPAM'    , 2);

define('MOLLOM_ANALYSIS_UNSURE'  , 3);

define('MOLLOM_MODE_DISABLED', 0);

define('MOLLOM_MODE_CAPTCHA' , 1);

define('MOLLOM_MODE_ANALYSIS', 2);

define('MOLLOM_FALLBACK_BLOCK' , 0);

define('MOLLOM_FALLBACK_ACCEPT', 1);

define('MOLLOM_ERROR'   , 1000);

define('MOLLOM_REFRESH' , 1100);

define('MOLLOM_REDIRECT', 1200);

/**

 * Plugin to check submitted notices with Mollom

 *

 * Mollom is a bayesian spam filter provided by webservice.

 *

 * @category Plugin

 * @package  Laconica

 * @author   Brenda Wallace <shiny@cpan.org>

 * @license  http://www.fsf.org/licensing/licenses/agpl-3.0.html GNU Affero General Public License version 3.0

 *

 * @see      Event

 */

class MollomPlugin extends Plugin

{

    function __construct($url=null) {

        parent::__construct();

    }

    function onStartNoticeSave($notice)

    {

    error_log(print_r($notice, 1));

      if (common_config('mollom', 'public_key')) {

        //Check spam

        $data = array(

            'post_body'      => $notice->content,

            'author_name'    => $profile->nickname,

            'author_url'     => $profile->homepage,

            'author_id'      => $profile->id,

            'author_ip'      => $this->getClientIp(),

        );

        $response = $this->mollom('mollom.checkContent', $data);

        if ($response['spam'] == MOLLOM_ANALYSIS_SPAM) {

          throw new ClientException(_("Spam Detected"), 400);

        }

        if ($response['spam'] == MOLLOM_ANALYSIS_UNSURE) {

          //if unsure, let through

        }

        if($response['spam'] == MOLLOM_ANALYSIS_HAM) {

          // all good! :-)

        }

      }

      return true;

    }

    function getClientIP() {

        if (isset($_SERVER) && array_key_exists('REQUEST_METHOD', $_SERVER)) {

            // Note: order matters here; use proxy-forwarded stuff first

            foreach (array('HTTP_X_FORWARDED_FOR', 'CLIENT-IP', 'REMOTE_ADDR') as $k) {

                if (isset($_SERVER[$k])) {

                    return $_SERVER[$k];

                }

            }

        }

        return '127.0.0.1';

    }

    /**

      * Call a remote procedure at the Mollom server.  This function will

      * automatically add the information required to authenticate against

      * Mollom.

      */

    function mollom($method, $data = array()) {

        if (!extension_loaded('xmlrpc')) {

            if (!dl('xmlrpc.so')) {

                common_log(LOG_ERR, "Can't pingback; xmlrpc extension not available.");

            }

        }

      // Construct the server URL:

      $public_key = common_config('mollom', 'public_key');

      // Retrieve the list of Mollom servers from the database:

      $servers = common_config('mollom', 'servers');

      if ($servers == NULL) {

        // Retrieve a list of valid Mollom servers from mollom.com:

        $servers = $this->xmlrpc('http://xmlrpc.mollom.com/'. MOLLOM_API_VERSION, 'mollom.getServerList', $this->authentication());

        // Store the list of servers in the database:

    // TODO!    variable_set('mollom_servers', $servers);

      }

      if (is_array($servers)) {

        // Send the request to the first server, if that fails, try the other servers in the list:

        foreach ($servers as $server) { 

          $auth = $this->authentication();

          $data = array_merge($data, $auth);

          $result = $this->xmlrpc($server .'/'. MOLLOM_API_VERSION, $method, $data);

          // Debug output:

          if (isset($data['session_id'])) {

            error_log("called $method at server $server with session ID '". $data['session_id'] ."'");

          }

          else {

            error_log("called $method at server $server with no session ID");

          }

          if ($errno = $this->xmlrpc_errno()) {

            error_log(sprintf('Error @errno: %s - %s - %s - <pre>%s</pre>', $this->xmlrpc_errno(), $server, $this->xmlrpc_error_msg(), $method, print_r($data, TRUE)));

            if ($errno == MOLLOM_REFRESH) {

              // Retrieve a list of valid Mollom servers from mollom.com:

              $servers = $this->xmlrpc('http://xmlrpc.mollom.com/'. MOLLOM_API_VERSION, 'mollom.getServerList', $this->authentication());

              // Store the updated list of servers in the database:

              //tODO variable_set('mollom_servers', $servers);

            }

            else if ($errno == MOLLOM_ERROR) {

              return $result;

            }

            else if ($errno == MOLLOM_REDIRECT) {

              // Do nothing, we select the next client automatically.

            }

            // Reset the XMLRPC error:

            $this->xmlrpc_error(0);  // FIXME: this is crazy.

          }

          else {

            error_log("Result = " . print_r($result, TRUE));

            return $result;

          }

        }

      }

      // If none of the servers worked, activate the fallback mechanism:

      error_log("none of the servers worked");

    //   _mollom_fallback();

      // If everything failed, we reset the server list to force Mollom to request a new list:

      //TODO variable_set('mollom_servers', array());

    }

    /**

    * This function generate an array with all the information required to

    * authenticate against Mollom. To prevent that requests are forged and

    * that you are impersonated, each request is signed with a hash computed

    * based on a private key and a timestamp.

    *

    * Both the client and the server share the secret key that is used to

    * create the authentication hash based on a timestamp.  They both hash

    * the timestamp with the secret key, and if the hashes match, the

    * authenticity of the message has been validated.

    *

    * To avoid that someone can intercept a (hash, timestamp)-pair and

    * use that to impersonate a client, Mollom will reject the request

    * when the timestamp is more than 15 minutes off.

    *

    * Make sure your server's time is synchronized with the world clocks,

    * and that you don't share your private key with anyone else.

    */

    private function authentication() {

      $public_key = common_config('mollom', 'public_key');

      $private_key = common_config('mollom', 'private_key');

      // Generate a timestamp according to the dateTime format (http://www.w3.org/TR/xmlschema-2/#dateTime):

      $time = gmdate("Y-m-d\TH:i:s.\\0\\0\\0O", time());

      // Calculate a HMAC-SHA1 according to RFC2104 (http://www.ietf.org/rfc/rfc2104.txt):

      $hash =  base64_encode(

      pack("H*", sha1((str_pad($private_key, 64, chr(0x00)) ^ (str_repeat(chr(0x5c), 64))) .

      pack("H*", sha1((str_pad($private_key, 64, chr(0x00)) ^ (str_repeat(chr(0x36), 64))) .

      $time))))

      );

      // Store everything in an array. Elsewhere in the code, we'll add the

      // acutal data before we pass it onto the XML-RPC library:

      $data['public_key'] = $public_key;

      $data['time'] = $time;

      $data['hash'] = $hash;

      return $data;

    }

    function xmlrpc($url) {

      //require_once './includes/xmlrpc.inc';

      $args = func_get_args();

      return call_user_func_array(array('MollomPlugin', '_xmlrpc'), $args);

    }

    /**

    * Recursively turn a data structure into objects with 'data' and 'type' attributes.

    *

    * @param $data

    *   The data structure.

    * @param  $type

    *   Optional type assign to $data.

    * @return

    *   Object.

    */

    function xmlrpc_value($data, $type = FALSE) {

      $xmlrpc_value = new stdClass();

      $xmlrpc_value->data = $data;

      if (!$type) {

        $type = $this->xmlrpc_value_calculate_type($xmlrpc_value);

      }

      $xmlrpc_value->type = $type;

      if ($type == 'struct') {

        // Turn all the values in the array into new xmlrpc_values

        foreach ($xmlrpc_value->data as $key => $value) {

          $xmlrpc_value->data[$key] = $this->xmlrpc_value($value);

        }

      }

      if ($type == 'array') {

        for ($i = 0, $j = count($xmlrpc_value->data); $i < $j; $i++) {

          $xmlrpc_value->data[$i] = $this->xmlrpc_value($xmlrpc_value->data[$i]);

        }

      }

      return $xmlrpc_value;

    }

    /**

    * Map PHP type to XML-RPC type.

    *

    * @param $xmlrpc_value

    *   Variable whose type should be mapped.

    * @return

    *   XML-RPC type as string.

    * @see

    *   http://www.xmlrpc.com/spec#scalars

    */

    function xmlrpc_value_calculate_type(&$xmlrpc_value) {

      // http://www.php.net/gettype: Never use gettype() to test for a certain type [...] Instead, use the is_* functions.

      if (is_bool($xmlrpc_value->data)) {

        return 'boolean';

      }

      if (is_double($xmlrpc_value->data)) {

        return 'double';

      }

      if (is_int($xmlrpc_value->data)) {

          return 'int';

      }

      if (is_array($xmlrpc_value->data)) {

        // empty or integer-indexed arrays are 'array', string-indexed arrays 'struct'

        return empty($xmlrpc_value->data) || range(0, count($xmlrpc_value->data) - 1) === array_keys($xmlrpc_value->data) ? 'array' : 'struct';

      }

      if (is_object($xmlrpc_value->data)) {

        if ($xmlrpc_value->data->is_date) {

          return 'date';

        }

        if ($xmlrpc_value->data->is_base64) {

          return 'base64';

        }

        $xmlrpc_value->data = get_object_vars($xmlrpc_value->data);

        return 'struct';

      }

      // default

      return 'string';

    }

/**

 * Generate XML representing the given value.

 *

 * @param $xmlrpc_value

 * @return

 *   XML representation of value.

 */

function xmlrpc_value_get_xml($xmlrpc_value) {

  switch ($xmlrpc_value->type) {

    case 'boolean':

      return '<boolean>'. (($xmlrpc_value->data) ? '1' : '0') .'</boolean>';

      break;

    case 'int':

      return '<int>'. $xmlrpc_value->data .'</int>';

      break;

    case 'double':

      return '<double>'. $xmlrpc_value->data .'</double>';

      break;

    case 'string':

      // Note: we don't escape apostrophes because of the many blogging clients

      // that don't support numerical entities (and XML in general) properly.

      return '<string>'. htmlspecialchars($xmlrpc_value->data) .'</string>';

      break;

    case 'array':

      $return = '<array><data>'."\n";

      foreach ($xmlrpc_value->data as $item) {

        $return .= '  <value>'. $this->xmlrpc_value_get_xml($item) ."</value>\n";

      }

      $return .= '</data></array>';

      return $return;

      break;

    case 'struct':

      $return = '<struct>'."\n";

      foreach ($xmlrpc_value->data as $name => $value) {

        $return .= "  <member><name>". htmlentities($name) ."</name><value>";

        $return .= $this->xmlrpc_value_get_xml($value) ."</value></member>\n";

      }

      $return .= '</struct>';

      return $return;

      break;

    case 'date':

      return $this->xmlrpc_date_get_xml($xmlrpc_value->data);

      break;

    case 'base64':

      return $this->xmlrpc_base64_get_xml($xmlrpc_value->data);

      break;

  }

  return FALSE;

}

    /**

    * Perform an HTTP request.

    *

    * This is a flexible and powerful HTTP client implementation. Correctly handles

    * GET, POST, PUT or any other HTTP requests. Handles redirects.

    *

    * @param $url

    *   A string containing a fully qualified URI.

    * @param $headers

    *   An array containing an HTTP header => value pair.

    * @param $method

    *   A string defining the HTTP request to use.

    * @param $data

    *   A string containing data to include in the request.

    * @param $retry

    *   An integer representing how many times to retry the request in case of a

    *   redirect.

    * @return

    *   An object containing the HTTP request headers, response code, headers,

    *   data and redirect status.

    */

    function http_request($url, $headers = array(), $method = 'GET', $data = NULL, $retry = 3) {

      global $db_prefix;

      $result = new stdClass();

      // Parse the URL and make sure we can handle the schema.

      $uri = parse_url($url);

      if ($uri == FALSE) {

        $result->error = 'unable to parse URL';

        return $result;

      }

      if (!isset($uri['scheme'])) {

        $result->error = 'missing schema';

        return $result;

      }

      switch ($uri['scheme']) {

        case 'http':

          $port = isset($uri['port']) ? $uri['port'] : 80;

          $host = $uri['host'] . ($port != 80 ? ':'. $port : '');

          $fp = @fsockopen($uri['host'], $port, $errno, $errstr, 15);

          break;

        case 'https':

          // Note: Only works for PHP 4.3 compiled with OpenSSL.

          $port = isset($uri['port']) ? $uri['port'] : 443;

          $host = $uri['host'] . ($port != 443 ? ':'. $port : '');

          $fp = @fsockopen('ssl://'. $uri['host'], $port, $errno, $errstr, 20);

          break;

        default:

          $result->error = 'invalid schema '. $uri['scheme'];

          return $result;

      }

      // Make sure the socket opened properly.

      if (!$fp) {

        // When a network error occurs, we use a negative number so it does not

        // clash with the HTTP status codes.

        $result->code = -$errno;

        $result->error = trim($errstr);

        // Mark that this request failed. This will trigger a check of the web

        // server's ability to make outgoing HTTP requests the next time that

        // requirements checking is performed.

        // @see system_requirements()

        //TODO variable_set('drupal_http_request_fails', TRUE);

        return $result;

      }

      // Construct the path to act on.

      $path = isset($uri['path']) ? $uri['path'] : '/';

      if (isset($uri['query'])) {

        $path .= '?'. $uri['query'];

      }

      // Create HTTP request.

      $defaults = array(

        // RFC 2616: "non-standard ports MUST, default ports MAY be included".

        // We don't add the port to prevent from breaking rewrite rules checking the

        // host that do not take into account the port number.

        'Host' => "Host: $host",

        'User-Agent' => 'User-Agent: Drupal (+http://drupal.org/)',

        'Content-Length' => 'Content-Length: '. strlen($data)

      );

      // If the server url has a user then attempt to use basic authentication

      if (isset($uri['user'])) {

        $defaults['Authorization'] = 'Authorization: Basic '. base64_encode($uri['user'] . (!empty($uri['pass']) ? ":". $uri['pass'] : ''));

      }

      // If the database prefix is being used by SimpleTest to run the tests in a copied

      // database then set the user-agent header to the database prefix so that any

      // calls to other Drupal pages will run the SimpleTest prefixed database. The

      // user-agent is used to ensure that multiple testing sessions running at the

      // same time won't interfere with each other as they would if the database

      // prefix were stored statically in a file or database variable.

      if (is_string($db_prefix) && preg_match("/^simpletest\d+$/", $db_prefix, $matches)) {

        $defaults['User-Agent'] = 'User-Agent: ' . $matches[0];

      }

      foreach ($headers as $header => $value) {

        $defaults[$header] = $header .': '. $value;

      }

      $request = $method .' '. $path ." HTTP/1.0\r\n";

      $request .= implode("\r\n", $defaults);

      $request .= "\r\n\r\n";

      $request .= $data;

      $result->request = $request;

      fwrite($fp, $request);

      // Fetch response.

      $response = '';

      while (!feof($fp) && $chunk = fread($fp, 1024)) {

        $response .= $chunk;

      }

      fclose($fp);

      // Parse response.

      list($split, $result->data) = explode("\r\n\r\n", $response, 2);

      $split = preg_split("/\r\n|\n|\r/", $split);

      list($protocol, $code, $text) = explode(' ', trim(array_shift($split)), 3);

      $result->headers = array();

      // Parse headers.

      while ($line = trim(array_shift($split))) {

        list($header, $value) = explode(':', $line, 2);

        if (isset($result->headers[$header]) && $header == 'Set-Cookie') {

          // RFC 2109: the Set-Cookie response header comprises the token Set-

          // Cookie:, followed by a comma-separated list of one or more cookies.

          $result->headers[$header] .= ','. trim($value);

        }

        else {

          $result->headers[$header] = trim($value);

        }

      }

      $responses = array(

        100 => 'Continue', 101 => 'Switching Protocols',

        200 => 'OK', 201 => 'Created', 202 => 'Accepted', 203 => 'Non-Authoritative Information', 204 => 'No Content', 205 => 'Reset Content', 206 => 'Partial Content',

        300 => 'Multiple Choices', 301 => 'Moved Permanently', 302 => 'Found', 303 => 'See Other', 304 => 'Not Modified', 305 => 'Use Proxy', 307 => 'Temporary Redirect',

        400 => 'Bad Request', 401 => 'Unauthorized', 402 => 'Payment Required', 403 => 'Forbidden', 404 => 'Not Found', 405 => 'Method Not Allowed', 406 => 'Not Acceptable', 407 => 'Proxy Authentication Required', 408 => 'Request Time-out', 409 => 'Conflict', 410 => 'Gone', 411 => 'Length Required', 412 => 'Precondition Failed', 413 => 'Request Entity Too Large', 414 => 'Request-URI Too Large', 415 => 'Unsupported Media Type', 416 => 'Requested range not satisfiable', 417 => 'Expectation Failed',

        500 => 'Internal Server Error', 501 => 'Not Implemented', 502 => 'Bad Gateway', 503 => 'Service Unavailable', 504 => 'Gateway Time-out', 505 => 'HTTP Version not supported'

      );

      // RFC 2616 states that all unknown HTTP codes must be treated the same as the

      // base code in their class.

      if (!isset($responses[$code])) {

        $code = floor($code / 100) * 100;

      }

      switch ($code) {

        case 200: // OK

        case 304: // Not modified

          break;

        case 301: // Moved permanently

        case 302: // Moved temporarily

        case 307: // Moved temporarily

          $location = $result->headers['Location'];

          if ($retry) {

            $result = drupal_http_request($result->headers['Location'], $headers, $method, $data, --$retry);

            $result->redirect_code = $result->code;

          }

          $result->redirect_url = $location;

          break;

        default:

          $result->error = $text;

      }

      $result->code = $code;

      return $result;

    }

    /**

    * Construct an object representing an XML-RPC message.

    *

    * @param $message

    *   String containing XML as defined at http://www.xmlrpc.com/spec

    * @return

    *   Object

    */

    function xmlrpc_message($message) {

      $xmlrpc_message = new stdClass();

      $xmlrpc_message->array_structs = array();   // The stack used to keep track of the current array/struct

      $xmlrpc_message->array_structs_types = array(); // The stack used to keep track of if things are structs or array

      $xmlrpc_message->current_struct_name = array();  // A stack as well

      $xmlrpc_message->message = $message;

      return $xmlrpc_message;

    }

    /**

    * Parse an XML-RPC message. If parsing fails, the faultCode and faultString

    * will be added to the message object.

    *

    * @param $xmlrpc_message

    *   Object generated by xmlrpc_message()

    * @return

    *   TRUE if parsing succeeded; FALSE otherwise

    */

    function xmlrpc_message_parse(&$xmlrpc_message) {

      // First remove the XML declaration

      $xmlrpc_message->message = preg_replace('/<\?xml(.*)?\?'.'>/', '', $xmlrpc_message->message);

      if (trim($xmlrpc_message->message) == '') {

        return FALSE;

      }

      $xmlrpc_message->_parser = xml_parser_create();

      // Set XML parser to take the case of tags into account.

      xml_parser_set_option($xmlrpc_message->_parser, XML_OPTION_CASE_FOLDING, FALSE);

      // Set XML parser callback functions

      xml_set_element_handler($xmlrpc_message->_parser, array('MollomPlugin', 'xmlrpc_message_tag_open'), array('MollomPlugin', 'xmlrpc_message_tag_close'));

      xml_set_character_data_handler($xmlrpc_message->_parser, array('MollomPlugin', 'xmlrpc_message_cdata'));

      $this->xmlrpc_message_set($xmlrpc_message);

      if (!xml_parse($xmlrpc_message->_parser, $xmlrpc_message->message)) {

        return FALSE;

      }

      xml_parser_free($xmlrpc_message->_parser);

      // Grab the error messages, if any

      $xmlrpc_message = $this->xmlrpc_message_get();

      if ($xmlrpc_message->messagetype == 'fault') {

        $xmlrpc_message->fault_code = $xmlrpc_message->params[0]['faultCode'];

        $xmlrpc_message->fault_string = $xmlrpc_message->params[0]['faultString'];

      }

      return TRUE;

    }

    /**

    * Store a copy of the $xmlrpc_message object temporarily.

    *

    * @param $value

    *   Object

    * @return

    *   The most recently stored $xmlrpc_message

    */

    function xmlrpc_message_set($value = NULL) {

      static $xmlrpc_message;

      if ($value) {

        $xmlrpc_message = $value;

      }

      return $xmlrpc_message;

    }

    function xmlrpc_message_get() {

      return $this->xmlrpc_message_set();

    }

    function xmlrpc_message_tag_open($parser, $tag, $attr) {

      $xmlrpc_message = $this->xmlrpc_message_get();

      $xmlrpc_message->current_tag_contents = '';

      $xmlrpc_message->last_open = $tag;

      switch ($tag) {

        case 'methodCall':

        case 'methodResponse':

        case 'fault':

          $xmlrpc_message->messagetype = $tag;

          break;

        // Deal with stacks of arrays and structs

        case 'data':

          $xmlrpc_message->array_structs_types[] = 'array';

          $xmlrpc_message->array_structs[] = array();

          break;

        case 'struct':

          $xmlrpc_message->array_structs_types[] = 'struct';

          $xmlrpc_message->array_structs[] = array();

          break;

      }

      $this->xmlrpc_message_set($xmlrpc_message);

    }

    function xmlrpc_message_cdata($parser, $cdata) {

      $xmlrpc_message = $this->xmlrpc_message_get();

      $xmlrpc_message->current_tag_contents .= $cdata;

      $this->xmlrpc_message_set($xmlrpc_message);

    }

    function xmlrpc_message_tag_close($parser, $tag) {

      $xmlrpc_message = $this->xmlrpc_message_get();

      $value_flag = FALSE;

      switch ($tag) {

        case 'int':

        case 'i4':

          $value = (int)trim($xmlrpc_message->current_tag_contents);

          $value_flag = TRUE;

          break;

        case 'double':

          $value = (double)trim($xmlrpc_message->current_tag_contents);

          $value_flag = TRUE;

          break;

        case 'string':

          $value = $xmlrpc_message->current_tag_contents;

          $value_flag = TRUE;

          break;

        case 'dateTime.iso8601':

          $value = xmlrpc_date(trim($xmlrpc_message->current_tag_contents));

          // $value = $iso->getTimestamp();

          $value_flag = TRUE;

          break;

        case 'value':

          // If no type is indicated, the type is string

          // We take special care for empty values

          if (trim($xmlrpc_message->current_tag_contents) != '' || (isset($xmlrpc_message->last_open) && ($xmlrpc_message->last_open == 'value'))) {

            $value = (string)$xmlrpc_message->current_tag_contents;

            $value_flag = TRUE;

          }

          unset($xmlrpc_message->last_open);

          break;

        case 'boolean':

          $value = (boolean)trim($xmlrpc_message->current_tag_contents);

          $value_flag = TRUE;

          break;

        case 'base64':

          $value = base64_decode(trim($xmlrpc_message->current_tag_contents));

          $value_flag = TRUE;

          break;

        // Deal with stacks of arrays and structs

        case 'data':

        case 'struct':

          $value = array_pop($xmlrpc_message->array_structs );

          array_pop($xmlrpc_message->array_structs_types);

          $value_flag = TRUE;

          break;

        case 'member':

          array_pop($xmlrpc_message->current_struct_name);

          break;

        case 'name':

          $xmlrpc_message->current_struct_name[] = trim($xmlrpc_message->current_tag_contents);

          break;

        case 'methodName':

          $xmlrpc_message->methodname = trim($xmlrpc_message->current_tag_contents);

          break;

      }

      if ($value_flag) {

        if (count($xmlrpc_message->array_structs ) > 0) {

          // Add value to struct or array

          if ($xmlrpc_message->array_structs_types[count($xmlrpc_message->array_structs_types)-1] == 'struct') {

            // Add to struct

            $xmlrpc_message->array_structs [count($xmlrpc_message->array_structs )-1][$xmlrpc_message->current_struct_name[count($xmlrpc_message->current_struct_name)-1]] = $value;

          }

          else {

            // Add to array

            $xmlrpc_message->array_structs [count($xmlrpc_message->array_structs )-1][] = $value;

          }

        }

        else {

          // Just add as a parameter

          $xmlrpc_message->params[] = $value;

        }

      }

      if (!in_array($tag, array("data", "struct", "member"))) {

        $xmlrpc_message->current_tag_contents = '';

      }

      $this->xmlrpc_message_set($xmlrpc_message);

    }

    /**

    * Construct an object representing an XML-RPC request

    *

    * @param $method

    *   The name of the method to be called

    * @param $args

    *   An array of parameters to send with the method.

    * @return

    *   Object

    */

    function xmlrpc_request($method, $args) {

      $xmlrpc_request = new stdClass();

      $xmlrpc_request->method = $method;

      $xmlrpc_request->args = $args;

      $xmlrpc_request->xml = <<<EOD

    <?xml version="1.0"?>

    <methodCall>

    <methodName>{$xmlrpc_request->method}</methodName>

    <params>

EOD;

      foreach ($xmlrpc_request->args as $arg) {

        $xmlrpc_request->xml .= '<param><value>';

        $v = $this->xmlrpc_value($arg);

        $xmlrpc_request->xml .= $this->xmlrpc_value_get_xml($v);

        $xmlrpc_request->xml .= "</value></param>\n";

      }

      $xmlrpc_request->xml .= '</params></methodCall>';

      return $xmlrpc_request;

    }

    function xmlrpc_error($code = NULL, $message = NULL, $reset = FALSE) {

      static $xmlrpc_error;

      if (isset($code)) {

        $xmlrpc_error = new stdClass();

        $xmlrpc_error->is_error = TRUE;

        $xmlrpc_error->code = $code;

        $xmlrpc_error->message = $message;

      }

      elseif ($reset) {

        $xmlrpc_error = NULL;

      }

      return $xmlrpc_error;

    }

    function xmlrpc_error_get_xml($xmlrpc_error) {

      return <<<EOD

    <methodResponse>

      <fault>

      <value>

        <struct>

        <member>

          <name>faultCode</name>

          <value><int>{$xmlrpc_error->code}</int></value>

        </member>

        <member>

          <name>faultString</name>

          <value><string>{$xmlrpc_error->message}</string></value>

        </member>

        </struct>

      </value>

      </fault>

    </methodResponse>

EOD;

    }

    function xmlrpc_date($time) {

      $xmlrpc_date = new stdClass();

      $xmlrpc_date->is_date = TRUE;

      // $time can be a PHP timestamp or an ISO one

      if (is_numeric($time)) {

        $xmlrpc_date->year = gmdate('Y', $time);

        $xmlrpc_date->month = gmdate('m', $time);

        $xmlrpc_date->day = gmdate('d', $time);

        $xmlrpc_date->hour = gmdate('H', $time);

        $xmlrpc_date->minute = gmdate('i', $time);

        $xmlrpc_date->second = gmdate('s', $time);

        $xmlrpc_date->iso8601 = gmdate('Ymd\TH:i:s', $time);

      }

      else {

        $xmlrpc_date->iso8601 = $time;

        $time = str_replace(array('-', ':'), '', $time);

        $xmlrpc_date->year = substr($time, 0, 4);

        $xmlrpc_date->month = substr($time, 4, 2);

        $xmlrpc_date->day = substr($time, 6, 2);

        $xmlrpc_date->hour = substr($time, 9, 2);

        $xmlrpc_date->minute = substr($time, 11, 2);

        $xmlrpc_date->second = substr($time, 13, 2);

      }

      return $xmlrpc_date;

    }

    function xmlrpc_date_get_xml($xmlrpc_date) {

      return '<dateTime.iso8601>'. $xmlrpc_date->year . $xmlrpc_date->month . $xmlrpc_date->day .'T'. $xmlrpc_date->hour .':'. $xmlrpc_date->minute .':'. $xmlrpc_date->second .'</dateTime.iso8601>';

    }

    function xmlrpc_base64($data) {

      $xmlrpc_base64 = new stdClass();

      $xmlrpc_base64->is_base64 = TRUE;

      $xmlrpc_base64->data = $data;

      return $xmlrpc_base64;

    }

    function xmlrpc_base64_get_xml($xmlrpc_base64) {

      return '<base64>'. base64_encode($xmlrpc_base64->data) .'</base64>';

    }

    /**

    * Execute an XML remote procedural call. This is private function; call xmlrpc()

    * in common.inc instead of this function.

    *

    * @return

    *   A $xmlrpc_message object if the call succeeded; FALSE if the call failed

    */

    function _xmlrpc() {

      $args = func_get_args();

      $url = array_shift($args);

      $this->xmlrpc_clear_error();

      if (is_array($args[0])) {

        $method = 'system.multicall';

        $multicall_args = array();

        foreach ($args[0] as $call) {

          $multicall_args[] = array('methodName' => array_shift($call), 'params' => $call);

        }

        $args = array($multicall_args);

      }

      else {

        $method = array_shift($args);

      }

      $xmlrpc_request = $this->xmlrpc_request($method, $args);

      $result = $this->http_request($url, array("Content-Type" => "text/xml"), 'POST', $xmlrpc_request->xml);

      if ($result->code != 200) {

        $this->xmlrpc_error($result->code, $result->error);

        return FALSE;

      }

      $message = $this->xmlrpc_message($result->data);

      // Now parse what we've got back

      if (!$this->xmlrpc_message_parse($message)) {

        // XML error

        $this->xmlrpc_error(-32700, t('Parse error. Not well formed'));

        return FALSE;

      }

      // Is the message a fault?

      if ($message->messagetype == 'fault') {

        $this->xmlrpc_error($message->fault_code, $message->fault_string);

        return FALSE;

      }

      // Message must be OK

      return $message->params[0];

    }

    /**

    * Returns the last XML-RPC client error number

    */

    function xmlrpc_errno() {

      $error = $this->xmlrpc_error();

      return ($error != NULL ? $error->code : NULL);

    }

    /**

    * Returns the last XML-RPC client error message

    */

    function xmlrpc_error_msg() {

      $error = xmlrpc_error();

      return ($error != NULL ? $error->message : NULL);

    }

  /**

  * Clears any previous error.

  */

  function xmlrpc_clear_error() {

    $this->xmlrpc_error(NULL, NULL, TRUE);

  }

}