<?php

/**

 * IXR - The Inutio XML-RPC Library

 *

 * @package IXR

 * @since 1.5

 *

 * @copyright Incutio Ltd 2002-2005

 * @version 1.7 (beta) 23rd May 2005

 * @author Simon Willison

 * @link http://scripts.incutio.com/xmlrpc/ Site

 * @link http://scripts.incutio.com/xmlrpc/manual.php Manual

 * @license BSD License http://www.opensource.org/licenses/bsd-license.php

 */

/**

 * IXR_Value

 *

 * @package IXR

 * @since 1.5

 */

class IXR_Value {

    var $data;

    var $type;

    function IXR_Value ($data, $type = false) {

        $this->data = $data;

        if (!$type) {

            $type = $this->calculateType();

        }

        $this->type = $type;

        if ($type == 'struct') {

            /* Turn all the values in the array in to new IXR_Value objects */

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

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

            }

        }

        if ($type == 'array') {

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

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

            }

        }

    }

    function calculateType() {

        if ($this->data === true || $this->data === false) {

            return 'boolean';

        }

        if (is_integer($this->data)) {

            return 'int';

        }

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

            return 'double';

        }

        // Deal with IXR object types base64 and date

        if (is_object($this->data) && is_a($this->data, 'IXR_Date')) {

            return 'date';

        }

        if (is_object($this->data) && is_a($this->data, 'IXR_Base64')) {

            return 'base64';

        }

        // If it is a normal PHP object convert it in to a struct

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

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

            return 'struct';

        }

        if (!is_array($this->data)) {

            return 'string';

        }

        /* We have an array - is it an array or a struct ? */

        if ($this->isStruct($this->data)) {

            return 'struct';

        } else {

            return 'array';

        }

    }

    function getXml() {

        /* Return XML for this value */

        switch ($this->type) {

            case 'boolean':

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

                break;

            case 'int':

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

                break;

            case 'double':

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

                break;

            case 'string':

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

                break;

            case 'array':

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

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

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

                }

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

                return $return;

                break;

            case 'struct':

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

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

					$name = htmlspecialchars($name);

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

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

                }

                $return .= '</struct>';

                return $return;

                break;

            case 'date':

            case 'base64':

                return $this->data->getXml();

                break;

        }

        return false;

    }

    function isStruct($array) {

        /* Nasty function to check if an array is a struct or not */

        $expected = 0;

        foreach ($array as $key => $value) {

            if ((string)$key != (string)$expected) {

                return true;

            }

            $expected++;

        }

        return false;

    }

}

/**

 * IXR_Message

 *

 * @package IXR

 * @since 1.5

 */

class IXR_Message {

    var $message;

    var $messageType;  // methodCall / methodResponse / fault

    var $faultCode;

    var $faultString;

    var $methodName;

    var $params;

    // Current variable stacks

    var $_arraystructs = array();   // The stack used to keep track of the current array/struct

    var $_arraystructstypes = array(); // Stack keeping track of if things are structs or array

    var $_currentStructName = array();  // A stack as well

    var $_param;

    var $_value;

    var $_currentTag;

    var $_currentTagContents;

    // The XML parser

    var $_parser;

    function IXR_Message (&$message) {

        $this->message = &$message;

    }

    function parse() {

		// first remove the XML declaration

		// this method avoids the RAM usage of preg_replace on very large messages

		$header = preg_replace( '/<\?xml.*?\?'.'>/', '', substr( $this->message, 0, 100 ), 1 );

		$this->message = substr_replace($this->message, $header, 0, 100);

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

            return false;

		}

        $this->_parser = xml_parser_create();

        // Set XML parser to take the case of tags in to account

        xml_parser_set_option($this->_parser, XML_OPTION_CASE_FOLDING, false);

        // Set XML parser callback functions

        xml_set_object($this->_parser, $this);

        xml_set_element_handler($this->_parser, 'tag_open', 'tag_close');

		xml_set_character_data_handler($this->_parser, 'cdata');

		$chunk_size = 262144; // 256Kb, parse in chunks to avoid the RAM usage on very large messages

		do {

			if ( strlen($this->message) <= $chunk_size )

				$final=true;

			$part = substr( $this->message, 0, $chunk_size );

			$this->message = substr( $this->message, $chunk_size );

			if ( !xml_parse( $this->_parser, $part, $final ) )

				return false;

			if ( $final )

				break;

		} while ( true );

		xml_parser_free($this->_parser);

        // Grab the error messages, if any

        if ($this->messageType == 'fault') {

            $this->faultCode = $this->params[0]['faultCode'];

            $this->faultString = $this->params[0]['faultString'];

		}

        return true;

    }

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

        $this->_currentTagContents = '';

        $this->currentTag = $tag;

        switch($tag) {

            case 'methodCall':

            case 'methodResponse':

            case 'fault':

                $this->messageType = $tag;

                break;

            /* Deal with stacks of arrays and structs */

            case 'data':    // data is to all intents and puposes more interesting than array

                $this->_arraystructstypes[] = 'array';

                $this->_arraystructs[] = array();

                break;

            case 'struct':

                $this->_arraystructstypes[] = 'struct';

                $this->_arraystructs[] = array();

                break;

        }

    }

    function cdata($parser, $cdata) {

        $this->_currentTagContents .= $cdata;

    }

    function tag_close($parser, $tag) {

        $valueFlag = false;

        switch($tag) {

            case 'int':

            case 'i4':

                $value = (int) trim($this->_currentTagContents);

                $valueFlag = true;

                break;

            case 'double':

                $value = (double) trim($this->_currentTagContents);

                $valueFlag = true;

                break;

            case 'string':

                $value = $this->_currentTagContents;

                $valueFlag = true;

                break;

            case 'dateTime.iso8601':

                $value = new IXR_Date(trim($this->_currentTagContents));

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

                $valueFlag = true;

                break;

            case 'value':

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

                if (trim($this->_currentTagContents) != '') {

                    $value = (string)$this->_currentTagContents;

                    $valueFlag = true;

                }

                break;

            case 'boolean':

                $value = (boolean) trim($this->_currentTagContents);

                $valueFlag = true;

                break;

            case 'base64':

                $value = base64_decode( trim( $this->_currentTagContents ) );

                $valueFlag = true;

                break;

            /* Deal with stacks of arrays and structs */

            case 'data':

            case 'struct':

                $value = array_pop($this->_arraystructs);

                array_pop($this->_arraystructstypes);

                $valueFlag = true;

                break;

            case 'member':

                array_pop($this->_currentStructName);

                break;

            case 'name':

                $this->_currentStructName[] = trim($this->_currentTagContents);

                break;

            case 'methodName':

                $this->methodName = trim($this->_currentTagContents);

                break;

        }

        if ($valueFlag) {

            if (count($this->_arraystructs) > 0) {

                // Add value to struct or array

                if ($this->_arraystructstypes[count($this->_arraystructstypes)-1] == 'struct') {

                    // Add to struct

                    $this->_arraystructs[count($this->_arraystructs)-1][$this->_currentStructName[count($this->_currentStructName)-1]] = $value;

                } else {

                    // Add to array

                    $this->_arraystructs[count($this->_arraystructs)-1][] = $value;

                }

            } else {

                // Just add as a paramater

                $this->params[] = $value;

            }

        }

        $this->_currentTagContents = '';

    }

}

/**

 * IXR_Server

 *

 * @package IXR

 * @since 1.5

 */

class IXR_Server {

    var $data;

    var $callbacks = array();

    var $message;

    var $capabilities;

    function IXR_Server($callbacks = false, $data = false) {

        $this->setCapabilities();

        if ($callbacks) {

            $this->callbacks = $callbacks;

        }

        $this->setCallbacks();

        $this->serve($data);

    }

    function serve($data = false) {

        if (!$data) {

            global $HTTP_RAW_POST_DATA;

            if (!$HTTP_RAW_POST_DATA) {

               header( 'Content-Type: text/plain' );

               die('XML-RPC server accepts POST requests only.');

            }

            $data = &$HTTP_RAW_POST_DATA;

        }

        $this->message = new IXR_Message($data);

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

            $this->error(-32700, 'parse error. not well formed');

        }

        if ($this->message->messageType != 'methodCall') {

            $this->error(-32600, 'server error. invalid xml-rpc. not conforming to spec. Request must be a methodCall');

        }

        $result = $this->call($this->message->methodName, $this->message->params);

        // Is the result an error?

        if (is_a($result, 'IXR_Error')) {

            $this->error($result);

        }

        // Encode the result

        $r = new IXR_Value($result);

        $resultxml = $r->getXml();

        // Create the XML

        $xml = <<<EOD

<methodResponse>

  <params>

    <param>

      <value>

        $resultxml

      </value>

    </param>

  </params>

</methodResponse>

EOD;

        // Send it

        $this->output($xml);

    }

    function call($methodname, $args) {

        if (!$this->hasMethod($methodname)) {

            return new IXR_Error(-32601, 'server error. requested method '.

                $methodname.' does not exist.');

        }

        $method = $this->callbacks[$methodname];

        // Perform the callback and send the response

        if (count($args) == 1) {

            // If only one paramater just send that instead of the whole array

            $args = $args[0];

        }

        // Are we dealing with a function or a method?

        if (substr($method, 0, 5) == 'this:') {

            // It's a class method - check it exists

            $method = substr($method, 5);

            if (!method_exists($this, $method)) {

                return new IXR_Error(-32601, 'server error. requested class method "'.

                    $method.'" does not exist.');

            }

            // Call the method

            $result = $this->$method($args);

        } else {

            // It's a function - does it exist?

            if (is_array($method)) {

                if (!method_exists($method[0], $method[1])) {

                    return new IXR_Error(-32601, 'server error. requested object method "'.

                        $method[1].'" does not exist.');

                }

            } else if (!function_exists($method)) {

                return new IXR_Error(-32601, 'server error. requested function "'.

                    $method.'" does not exist.');

            }

            // Call the function

            $result = call_user_func($method, $args);

        }

        return $result;

    }

    function error($error, $message = false) {

        // Accepts either an error object or an error code and message

        if ($message && !is_object($error)) {