installed dokuwiki, added to navbar, updated news

1 files changed, 1132 insertions, 0 deletions

diff --git a/wiki/inc/IXR_Library.php b/wiki/inc/IXR_Library.php
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@@ -0,0 +1,1132 @@
+<?php
+
+/**
+ * IXR - The Incutio XML-RPC Library
+ *
+ * Copyright (c) 2010, Incutio Ltd.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  - Redistributions of source code must retain the above copyright notice,
+ *    this list of conditions and the following disclaimer.
+ *  - Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *  - Neither the name of Incutio Ltd. nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+ * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * @package IXR
+ * @since 1.5
+ *
+ * @copyright  Incutio Ltd 2010 (http://www.incutio.com)
+ * @version    1.7.4 7th September 2010
+ * @author     Simon Willison
+ * @link       http://scripts.incutio.com/xmlrpc/ Site/manual
+ *
+ * Modified for DokuWiki
+ * @author  Andreas Gohr <andi@splitbrain.org>
+ */
+class IXR_Value {
+
+    /** @var  IXR_Value[]|IXR_Date|IXR_Base64|int|bool|double|string */
+    var $data;
+    /** @var string */
+    var $type;
+
+    /**
+     * @param mixed $data
+     * @param bool $type
+     */
+    function __construct($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]);
+            }
+        }
+    }
+
+    /**
+     * @return string
+     */
+    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($this->data)) {
+            return 'struct';
+        } else {
+            return 'array';
+        }
+    }
+
+    /**
+     * @return bool|string
+     */
+    function getXml() {
+        // Return XML for this value
+        switch($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) {
+                    $return .= "  <member><name>$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;
+    }
+
+    /**
+     * Checks whether or not the supplied array is a struct or not
+     *
+     * @param array $array
+     * @return boolean
+     */
+    function isStruct($array) {
+        $expected = 0;
+        foreach($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;
+    var $_lastseen;
+    // The XML parser
+    var $_parser;
+
+    /**
+     * @param string $message
+     */
+    function __construct($message) {
+        $this->message =& $message;
+    }
+
+    /**
+     * @return bool
+     */
+    function parse() {
+        // first remove the XML declaration
+        // merged from WP #10698 - 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);
+
+        // workaround for a bug in PHP/libxml2, see http://bugs.php.net/bug.php?id=45996
+        $this->message = str_replace('&lt;', '&#60;', $this->message);
+        $this->message = str_replace('&gt;', '&#62;', $this->message);
+        $this->message = str_replace('&amp;', '&#38;', $this->message);
+        $this->message = str_replace('&apos;', '&#39;', $this->message);
+        $this->message = str_replace('&quot;', '&#34;', $this->message);
+        $this->message = str_replace("\x0b", ' ', $this->message); //vertical tab
+        if(trim($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
+        $final = false;
+        do {
+            if(strlen($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;
+    }
+
+    /**
+     * @param $parser
+     * @param string $tag
+     * @param $attr
+     */
+    function tag_open($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 purposes more interesting than array
+                $this->_arraystructstypes[] = 'array';
+                $this->_arraystructs[] = array();
+                break;
+            case 'struct':
+                $this->_arraystructstypes[] = 'struct';
+                $this->_arraystructs[] = array();
+                break;
+        }
+        $this->_lastseen = $tag;
+    }
+
+    /**
+     * @param $parser
+     * @param string $cdata
+     */
+    function cdata($parser, $cdata) {
+        $this->_currentTagContents .= $cdata;
+    }
+
+    /**
+     * @param $parser
+     * @param $tag
+     */
+    function tag_close($parser, $tag) {
+        $value = null;
+        $valueFlag = false;
+        switch($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 = (string) $this->_currentTagContents;
+                $valueFlag = true;
+                break;
+            case 'dateTime.iso8601':
+                $value = new IXR_Date(trim($this->_currentTagContents));
+                $valueFlag = true;
+                break;
+            case 'value':
+                // "If no type is indicated, the type is string."
+                if($this->_lastseen == 'value') {
+                    $value = (string) $this->_currentTagContents;
+                    $valueFlag = true;
+                }
+                break;
+            case 'boolean':
+                $value = (boolean) trim($this->_currentTagContents);
+                $valueFlag = true;
+                break;
+            case 'base64':
+                $value = base64_decode($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 parameter
+                $this->params[] = $value;
+            }
+        }
+        $this->_currentTagContents = '';
+        $this->_lastseen = $tag;
+    }
+}
+
+/**
+ * IXR_Server
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_Server {
+    var $data;
+    /** @var array */
+    var $callbacks = array();
+    var $message;
+    /** @var array */
+    var $capabilities;
+
+    /**
+     * @param array|bool $callbacks
+     * @param bool $data
+     * @param bool $wait
+     */
+    function __construct($callbacks = false, $data = false, $wait = false) {
+        $this->setCapabilities();
+        if($callbacks) {
+            $this->callbacks = $callbacks;
+        }
+        $this->setCallbacks();
+
+        if(!$wait) {
+            $this->serve($data);
+        }
+    }
+
+    /**
+     * @param bool|string $data
+     */
+    function serve($data = false) {
+        if(!$data) {
+
+            $postData = trim(http_get_raw_post_data());
+            if(!$postData) {
+                header('Content-Type: text/plain'); // merged from WP #9093
+                die('XML-RPC server accepts POST requests only.');
+            }
+            $data = $postData;
+        }
+        $this->message = new IXR_Message($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);
+    }
+
+    /**
+     * @param string $methodname
+     * @param array $args
+     * @return IXR_Error|mixed
+     */
+    function call($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
+
+        # Removed for DokuWiki to have a more consistent interface
+        #        if (count($args) == 1) {
+        #            // If only one parameter just send that instead of the whole array
+        #            $args = $args[0];
+        #        }
+
+        # Adjusted for DokuWiki to use call_user_func_array
+
+        // args need to be an array
+        $args = (array) $args;
+
+        // Are we dealing with a function or a method?
+        if(is_string($method) && 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);
+            $result = call_user_func_array(array(&$this, $method), $args);
+        } elseif(substr($method, 0, 7) == 'plugin:') {
+            list($pluginname, $callback) = explode(':', substr($method, 7), 2);
+            if(!plugin_isdisabled($pluginname)) {
+                $plugin = plugin_load('action', $pluginname);
+                return call_user_func_array(array($plugin, $callback), $args);
+            } else {
+                return new IXR_Error(-99999, 'server error');
+            }
+        } else {
+            // It's a function - does it exist?
+            if(is_array($method)) {
+                if(!is_callable(array($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;
+    }
+
+    /**
+     * @param int $error
+     * @param string|bool $message
+     */
+    function error($error, $message = false) {
+        // Accepts either an error object or an error code and message
+        if($message && !is_object($error)) {
+            $error = new IXR_Error($error, $message);
+        }
+        $this->output($error->getXml());
+    }
+
+    /**
+     * @param string $xml
+     */
+    function output($xml) {
+        header('Content-Type: text/xml; charset=utf-8');
+        echo '<?xml version="1.0"?>', "\n", $xml;
+        exit;
+    }
+
+    /**
+     * @param string $method
+     * @return bool
+     */
+    function hasMethod($method) {
+        return in_array($method, array_keys($this->callbacks));
+    }
+
+    function setCapabilities() {
+        // Initialises capabilities array
+        $this->capabilities = array(
+            'xmlrpc' => array(
+                'specUrl' => 'http://www.xmlrpc.com/spec',
+                'specVersion' => 1
+            ),
+            'faults_interop' => array(
+                'specUrl' => 'http://xmlrpc-epi.sourceforge.net/specs/rfc.fault_codes.php',
+                'specVersion' => 20010516
+            ),
+            'system.multicall' => array(
+                'specUrl' => 'http://www.xmlrpc.com/discuss/msgReader$1208',
+                'specVersion' => 1
+            ),
+        );
+    }
+
+    /**
+     * @return mixed
+     */
+    function getCapabilities() {
+        return $this->capabilities;
+    }
+
+    function setCallbacks() {
+        $this->callbacks['system.getCapabilities'] = 'this:getCapabilities';
+        $this->callbacks['system.listMethods'] = 'this:listMethods';
+        $this->callbacks['system.multicall'] = 'this:multiCall';
+    }
+
+    /**
+     * @return array
+     */
+    function listMethods() {
+        // Returns a list of methods - uses array_reverse to ensure user defined
+        // methods are listed before server defined methods
+        return array_reverse(array_keys($this->callbacks));
+    }
+
+    /**
+     * @param array $methodcalls
+     * @return array
+     */
+    function multiCall($methodcalls) {
+        // See http://www.xmlrpc.com/discuss/msgReader$1208
+        $return = array();
+        foreach($methodcalls as $call) {
+            $method = $call['methodName'];
+            $params = $call['params'];
+            if($method == 'system.multicall') {
+                $result = new IXR_Error(-32800, 'Recursive calls to system.multicall are forbidden');
+            } else {
+                $result = $this->call($method, $params);
+            }
+            if(is_a($result, 'IXR_Error')) {
+                $return[] = array(
+                    'faultCode' => $result->code,
+                    'faultString' => $result->message
+                );
+            } else {
+                $return[] = array($result);
+            }
+        }
+        return $return;
+    }
+}
+
+/**
+ * IXR_Request
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_Request {
+    /** @var string */
+    var $method;
+    /** @var array */
+    var $args;
+    /** @var string */
+    var $xml;
+
+    /**
+     * @param string $method
+     * @param array $args
+     */
+    function __construct($method, $args) {
+        $this->method = $method;
+        $this->args = $args;
+        $this->xml = <<<EOD
+<?xml version="1.0"?>
+<methodCall>
+<methodName>{$this->method}</methodName>
+<params>
+
+EOD;
+        foreach($this->args as $arg) {
+            $this->xml .= '<param><value>';
+            $v = new IXR_Value($arg);
+            $this->xml .= $v->getXml();
+            $this->xml .= "</value></param>\n";
+        }
+        $this->xml .= '</params></methodCall>';
+    }
+
+    /**
+     * @return int
+     */
+    function getLength() {
+        return strlen($this->xml);
+    }
+
+    /**
+     * @return string
+     */
+    function getXml() {
+        return $this->xml;
+    }
+}
+
+/**
+ * IXR_Client
+ *
+ * @package IXR
+ * @since 1.5
+ *
+ * Changed for DokuWiki to use DokuHTTPClient
+ *
+ * This should be compatible to the original class, but uses DokuWiki's
+ * HTTP client library which will respect proxy settings
+ *
+ * Because the XMLRPC client is not used in DokuWiki currently this is completely
+ * untested
+ */
+class IXR_Client extends DokuHTTPClient {
+    var $posturl = '';
+    /** @var IXR_Message|bool */
+    var $message = false;
+
+    // Storage place for an error message
+    /** @var IXR_Error|bool */
+    var $xmlerror = false;
+
+    /**
+     * @param string $server
+     * @param string|bool $path
+     * @param int $port
+     * @param int $timeout
+     */
+    function __construct($server, $path = false, $port = 80, $timeout = 15) {
+        parent::__construct();
+        if(!$path) {
+            // Assume we have been given a URL instead
+            $this->posturl = $server;
+        } else {
+            $this->posturl = 'http://' . $server . ':' . $port . $path;
+        }
+        $this->timeout = $timeout;
+    }
+
+    /**
+     * parameters: method and arguments
+     * @return bool success or error
+     */
+    function query() {
+        $args = func_get_args();
+        $method = array_shift($args);
+        $request = new IXR_Request($method, $args);
+        $xml = $request->getXml();
+
+        $this->headers['Content-Type'] = 'text/xml';
+        if(!$this->sendRequest($this->posturl, $xml, 'POST')) {
+            $this->xmlerror = new IXR_Error(-32300, 'transport error - ' . $this->error);
+            return false;
+        }
+
+        // Check HTTP Response code
+        if($this->status < 200 || $this->status > 206) {
+            $this->xmlerror = new IXR_Error(-32300, 'transport error - HTTP status ' . $this->status);
+            return false;
+        }
+
+        // Now parse what we've got back
+        $this->message = new IXR_Message($this->resp_body);
+        if(!$this->message->parse()) {
+            // XML error
+            $this->xmlerror = new IXR_Error(-32700, 'parse error. not well formed');
+            return false;
+        }
+
+        // Is the message a fault?
+        if($this->message->messageType == 'fault') {
+            $this->xmlerror = new IXR_Error($this->message->faultCode, $this->message->faultString);
+            return false;
+        }
+
+        // Message must be OK
+        return true;
+    }
+
+    /**
+     * @return mixed
+     */
+    function getResponse() {
+        // methodResponses can only have one param - return that
+        return $this->message->params[0];
+    }
+
+    /**
+     * @return bool
+     */
+    function isError() {
+        return (is_object($this->xmlerror));
+    }
+
+    /**
+     * @return int
+     */
+    function getErrorCode() {
+        return $this->xmlerror->code;
+    }
+
+    /**
+     * @return string
+     */
+    function getErrorMessage() {
+        return $this->xmlerror->message;
+    }
+}
+
+/**
+ * IXR_Error
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_Error {
+    var $code;
+    var $message;
+
+    /**
+     * @param int $code
+     * @param string $message
+     */
+    function __construct($code, $message) {
+        $this->code = $code;
+        $this->message = htmlspecialchars($message);
+    }
+
+    /**
+     * @return string
+     */
+    function getXml() {
+        $xml = <<<EOD
+<methodResponse>
+  <fault>
+    <value>
+      <struct>
+        <member>
+          <name>faultCode</name>
+          <value><int>{$this->code}</int></value>
+        </member>
+        <member>
+          <name>faultString</name>
+          <value><string>{$this->message}</string></value>
+        </member>
+      </struct>
+    </value>
+  </fault>
+</methodResponse>
+
+EOD;
+        return $xml;
+    }
+}
+
+/**
+ * IXR_Date
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_Date {
+
+    /** @var DateTime */
+    protected $date;
+
+    /**
+     * @param int|string $time
+     */
+    public function __construct($time) {
+        // $time can be a PHP timestamp or an ISO one
+        if(is_numeric($time)) {
+            $this->parseTimestamp($time);
+        } else {
+            $this->parseIso($time);
+        }
+    }
+
+    /**
+     * Parse unix timestamp
+     *
+     * @param int $timestamp
+     */
+    protected function parseTimestamp($timestamp) {
+        $this->date = new DateTime('@' . $timestamp);
+    }
+
+    /**
+     * Parses less or more complete iso dates and much more, if no timezone given assumes UTC
+     *
+     * @param string $iso
+     */
+    protected function parseIso($iso) {
+        $this->date = new DateTime($iso, new DateTimeZone("UTC"));
+    }
+
+    /**
+     * Returns date in ISO 8601 format
+     *
+     * @return string
+     */
+    public function getIso() {
+        return $this->date->format(DateTime::ISO8601);
+    }
+
+    /**
+     * Returns date in valid xml
+     *
+     * @return string
+     */
+    public function getXml() {
+        return '<dateTime.iso8601>' . $this->getIso() . '</dateTime.iso8601>';
+    }
+
+    /**
+     * Returns Unix timestamp
+     *
+     * @return int
+     */
+    function getTimestamp() {
+        return $this->date->getTimestamp();
+    }
+}
+
+/**
+ * IXR_Base64
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_Base64 {
+    var $data;
+
+    /**
+     * @param string $data
+     */
+    function __construct($data) {
+        $this->data = $data;
+    }
+
+    /**
+     * @return string
+     */
+    function getXml() {
+        return '<base64>' . base64_encode($this->data) . '</base64>';
+    }
+}
+
+/**
+ * IXR_IntrospectionServer
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_IntrospectionServer extends IXR_Server {
+    /** @var array[] */
+    var $signatures;
+    /** @var string[] */
+    var $help;
+
+    /**
+     * Constructor
+     */
+    function __construct() {
+        $this->setCallbacks();
+        $this->setCapabilities();
+        $this->capabilities['introspection'] = array(
+            'specUrl' => 'http://xmlrpc.usefulinc.com/doc/reserved.html',
+            'specVersion' => 1
+        );
+        $this->addCallback(
+            'system.methodSignature',
+            'this:methodSignature',
+            array('array', 'string'),
+            'Returns an array describing the return type and required parameters of a method'
+        );
+        $this->addCallback(
+            'system.getCapabilities',
+            'this:getCapabilities',
+            array('struct'),
+            'Returns a struct describing the XML-RPC specifications supported by this server'
+        );
+        $this->addCallback(
+            'system.listMethods',
+            'this:listMethods',
+            array('array'),
+            'Returns an array of available methods on this server'
+        );
+        $this->addCallback(
+            'system.methodHelp',
+            'this:methodHelp',
+            array('string', 'string'),
+            'Returns a documentation string for the specified method'
+        );
+    }
+
+    /**
+     * @param string $method
+     * @param string $callback
+     * @param string[] $args
+     * @param string $help
+     */
+    function addCallback($method, $callback, $args, $help) {
+        $this->callbacks[$method] = $callback;
+        $this->signatures[$method] = $args;
+        $this->help[$method] = $help;
+    }
+
+    /**
+     * @param string $methodname
+     * @param array $args
+     * @return IXR_Error|mixed
+     */
+    function call($methodname, $args) {
+        // Make sure it's in an array
+        if($args && !is_array($args)) {
+            $args = array($args);
+        }
+
+        // Over-rides default call method, adds signature check
+        if(!$this->hasMethod($methodname)) {
+            return new IXR_Error(-32601, 'server error. requested method "' . $this->message->methodName . '" not specified.');
+        }
+        $method = $this->callbacks[$methodname];
+        $signature = $this->signatures[$methodname];
+        $returnType = array_shift($signature);
+        // Check the number of arguments. Check only, if the minimum count of parameters is specified. More parameters are possible.
+        // This is a hack to allow optional parameters...
+        if(count($args) < count($signature)) {
+            // print 'Num of args: '.count($args).' Num in signature: '.count($signature);
+            return new IXR_Error(-32602, 'server error. wrong number of method parameters');
+        }
+
+        // Check the argument types
+        $ok = true;
+        $argsbackup = $args;
+        for($i = 0, $j = count($args); $i < $j; $i++) {
+            $arg = array_shift($args);
+            $type = array_shift($signature);
+            switch($type) {
+                case 'int':
+                case 'i4':
+                    if(is_array($arg) || !is_int($arg)) {
+                        $ok = false;
+                    }
+                    break;
+                case 'base64':
+                case 'string':
+                    if(!is_string($arg)) {
+                        $ok = false;
+                    }
+                    break;
+                case 'boolean':
+                    if($arg !== false && $arg !== true) {
+                        $ok = false;
+                    }
+                    break;
+                case 'float':
+                case 'double':
+                    if(!is_float($arg)) {
+                        $ok = false;
+                    }
+                    break;
+                case 'date':
+                case 'dateTime.iso8601':
+                    if(!is_a($arg, 'IXR_Date')) {
+                        $ok = false;
+                    }
+                    break;
+            }
+            if(!$ok) {
+                return new IXR_Error(-32602, 'server error. invalid method parameters');
+            }
+        }
+        // It passed the test - run the "real" method call
+        return parent::call($methodname, $argsbackup);
+    }
+
+    /**
+     * @param string $method
+     * @return array|IXR_Error
+     */
+    function methodSignature($method) {
+        if(!$this->hasMethod($method)) {
+            return new IXR_Error(-32601, 'server error. requested method "' . $method . '" not specified.');
+        }
+        // We should be returning an array of types
+        $types = $this->signatures[$method];
+        $return = array();
+        foreach($types as $type) {
+            switch($type) {
+                case 'string':
+                    $return[] = 'string';
+                    break;
+                case 'int':
+                case 'i4':
+                    $return[] = 42;
+                    break;
+                case 'double':
+                    $return[] = 3.1415;
+                    break;
+                case 'dateTime.iso8601':
+                    $return[] = new IXR_Date(time());
+                    break;
+                case 'boolean':
+                    $return[] = true;
+                    break;
+                case 'base64':
+                    $return[] = new IXR_Base64('base64');
+                    break;
+                case 'array':
+                    $return[] = array('array');
+                    break;
+                case 'struct':
+                    $return[] = array('struct' => 'struct');
+                    break;
+            }
+        }
+        return $return;
+    }
+
+    /**
+     * @param string $method
+     * @return mixed
+     */
+    function methodHelp($method) {
+        return $this->help[$method];
+    }
+}
+
+/**
+ * IXR_ClientMulticall
+ *
+ * @package IXR
+ * @since 1.5
+ */
+class IXR_ClientMulticall extends IXR_Client {
+
+    /** @var array[] */
+    var $calls = array();
+
+    /**
+     * @param string $server
+     * @param string|bool $path
+     * @param int $port
+     */
+    function __construct($server, $path = false, $port = 80) {
+        parent::__construct($server, $path, $port);
+        //$this->useragent = 'The Incutio XML-RPC PHP Library (multicall client)';
+    }
+
+    /**
+     * Add a call
+     */
+    function addCall() {
+        $args = func_get_args();
+        $methodName = array_shift($args);
+        $struct = array(
+            'methodName' => $methodName,
+            'params' => $args
+        );
+        $this->calls[] = $struct;
+    }
+
+    /**
+     * @return bool
+     */
+    function query() {
+        // Prepare multicall, then call the parent::query() method
+        return parent::query('system.multicall', $this->calls);
+    }
+}
+