Added OGS

4 files changed, 886 insertions, 0 deletions

diff --git a/ogs/common/database.inc.php.tmpl b/ogs/common/database.inc.php.tmpl
new file mode 100644
index 0000000..42ac5ca
--- /dev/null
+++ b/ogs/common/database.inc.php.tmpl
@@ -0,0 +1,9 @@
+<?
+// this file tells all the OGS services where to find the MySQL database
+// if multiple OGS services are running on one machine, it is assumed that they all use the same MySQL server/database
+
+$dbhost="YOURSERVERHERE";
+$dbuser="opengridservice";
+$dbname="OGS";
+$dbpasswd="supersecret";
+?>
diff --git a/ogs/common/grid_config.inc.php b/ogs/common/grid_config.inc.php
new file mode 100644
index 0000000..0bc6a5e
--- /dev/null
+++ b/ogs/common/grid_config.inc.php
@@ -0,0 +1,7 @@
+<?
+// this file is common across servers and must be kept in sync
+
+$gridserver_url="http://www.garethnelson.com/ogs/gridserver/";
+
+$grid_owner="Gareth Nelson";
+?>
\ No newline at end of file
diff --git a/ogs/common/util.inc.php b/ogs/common/util.inc.php
new file mode 100644
index 0000000..b931205
--- /dev/null
+++ b/ogs/common/util.inc.php
@@ -0,0 +1,42 @@
+<?
+// Some generic utilities which may be used by any services
+
+function inc_lluuid($lluuid)
+{
+    $partB = substr($lluuid, 15);
+    $partB = (float)base_convert($partB,16,10)+1;
+    $partB = sprintf('%016x', $partB);
+    $partA = substr($lluuid, 0, 16);
+
+    if(substr($lluuid,15,16)=='FFFFFFFFFFFFFFFE') {
+        $partA = (float)base_convert($partA,16,10)+1;
+        $partA = sprintf('%016x', $partA);
+    }
+
+    $returnval = sprintf('%s%s',$partA, $partB);
+    
+    return $returnval;
+}
+
+function format_lluuid($uuid)
+{
+    return strtolower(substr($uuid,0,8)."-".substr($uuid,8,4)."-".substr($uuid,12,4)."-".substr($uuid,16,4)."-".substr($uuid,20));
+}
+
+function output_xml_block($blockname, $data) {
+        echo("<$blockname>\n");
+        foreach($data as $name => $value) {
+                echo(" <$name>$value</$name>\n");               
+        }
+        echo("</$blockname>\n");
+}
+
+function rand_uuid()
+{
+   return sprintf( '%04x%04x-%04x-%04x-%04x-%04x%04x%04x',
+   mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ),
+   mt_rand( 0, 0x0fff ) | 0x4000,
+   mt_rand( 0, 0x3fff ) | 0x8000,
+   mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ), mt_rand( 0, 0xffff ) );
+}
+?>
diff --git a/ogs/common/xmlrpc.inc.php b/ogs/common/xmlrpc.inc.php
new file mode 100644
index 0000000..03c1ee7
--- /dev/null
+++ b/ogs/common/xmlrpc.inc.php
@@ -0,0 +1,828 @@
+<?php
+
+/* 
+   IXR - The Inutio XML-RPC Library - (c) Incutio Ltd 2002
+   Version 1.61 - Simon Willison, 11th July 2003 (htmlentities -> htmlspecialchars)
+   Site:   http://scripts.incutio.com/xmlrpc/
+   Manual: http://scripts.incutio.com/xmlrpc/manual.php
+   Made available under the Artistic License: http://www.opensource.org/licenses/artistic-license.php
+*/
+
+
+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 'i4';
+        }
+        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($this->data, 'IXR_Base64')) {
+            return 'base64';
+        }
+        if (is_object($this->data)) {
+            return 'object';
+        }
+        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>'.(($this->data) ? '1' : '0').'</boolean>';
+                break;
+            case 'i4':
+                return '<i4>'.$this->data.'</i4>';
+                break;
+            case 'double':
+                return '<double>'.$this->data.'</double>';
+                break;
+            case 'string':
+                return '<string>'.htmlspecialchars($this->data).'</string>';
+                break;
+            case 'array':
+                $return = '<array><data>'."";
+                foreach ($this->data as $item) {
+                    $return .= '  <value>'.$item->getXml()."</value>";
+                }
+                $return .= '</data></array>';
+                return $return;
+                break;
+            case 'struct':
+                $return = '<struct>'."";
+                foreach ($this->data as $name => $value) {
+                    $return .= "<member><name>$name</name><value>";
+                    $return .= $value->getXml()."</value></member>";
+                }
+                $return .= '</struct>';
+                return $return;
+                break;
+            case 'date':
+            case 'base64':
+                return $this->data->getXml();
+                break;
+            case 'object':
+                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;
+    }
+}
+
+
+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->message = preg_replace('/<\?xml(.*)?\?'.'>/', '', $this->message);
+        if (trim($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($this->_parser, 'cdata');
+        if (!xml_parse($this->_parser, $this->message)) {
+            /* die(sprintf('XML error: %s at line %d',
+                xml_error_string(xml_get_error_code($this->_parser)),
+                xml_get_current_line_number($this->_parser))); */
+            return false;
+        }
+        xml_parser_free($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->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);
+                $this->_currentTagContents = '';
+                $valueFlag = true;
+                break;
+            case 'double':
+                $value = (double)trim($this->_currentTagContents);
+                $this->_currentTagContents = '';
+                $valueFlag = true;
+                break;
+            case 'string':
+                $value = (string)trim($this->_currentTagContents);
+                $this->_currentTagContents = '';
+                $valueFlag = true;
+                break;
+            case 'dateTime.iso8601':
+                $value = new IXR_Date(trim($this->_currentTagContents));
+                // $value = $iso->getTimestamp();
+                $this->_currentTagContents = '';
+                $valueFlag = true;
+                break;
+            case 'value':
+                // "If no type is indicated, the type is string."
+                if (trim($this->_currentTagContents) != '') {
+                    $value = (string)$this->_currentTagContents;
+                    $this->_currentTagContents = '';
+                    $valueFlag = true;
+                }
+                break;
+            case 'boolean':
+                $value = (boolean)trim($this->_currentTagContents);
+                $this->_currentTagContents = '';
+                $valueFlag = true;
+                break;
+            case 'base64':
+                $value = base64_decode($this->_currentTagContents);
+                $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);
+                $this->_currentTagContents = '';
+                break;
+            case 'methodName':
+                $this->methodName = trim($this->_currentTagContents);
+                $this->_currentTagContents = '';
+                break;
+        }
+        if ($valueFlag) {
+            /*
+            if (!is_array($value) && !is_object($value)) {
+                $value = trim($value);
+            }
+            */
+            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;
+            }
+        }
+    }       
+}
+
+
+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) {
+               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($args);
+        } else {
+            // It's a function - does it exist?
+            if (!function_exists($method)) {
+                return new IXR_Error(-32601, 'server error. requested function "'.$method.'" does not exist.');
+            }
+            // Call the function
+            $result = $method($args);
+        }
+        return $result;
+    }
+
+    function error($error, $message = false) {
+        // Accepts either an error object or an error code and message
+        if ($message && !is_object($error)) {
+            $error = new IXR_Error($error, $message);
+        }
+        $this->output($error->getXml());
+    }
+    function output($xml) {
+        $xml = '<?xml version="1.0" encoding="utf-8"?>'."".$xml;
+        $length = strlen($xml);
+        header('Connection: close');
+        header('Content-Length: '.$length);
+        header('Content-Type: text/xml');
+        header('Date: '.date('r'));
+        echo $xml;
+        exit;
+    }
+    function hasMethod($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$1208',
+                'specVersion' => 1
+            ),
+        );   
+    }
+    function getCapabilities($args) {
+        return $this->capabilities;
+    }
+    function setCallbacks() {
+        $this->callbacks['system.getCapabilities'] = 'this:getCapabilities';
+        $this->callbacks['system.listMethods'] = 'this:listMethods';
+        $this->callbacks['system.multicall'] = 'this:multiCall';
+    }
+    function listMethods($args) {
+        // Returns a list of methods - uses array_reverse to ensure user defined
+        // methods are listed before server defined methods
+        return array_reverse(array_keys($this->callbacks));
+    }
+    function multiCall($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(-32600, '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;
+    }
+}
+
+class IXR_Request {
+    var $method;
+    var $args;
+    var $xml;
+    function IXR_Request($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>";
+        }
+        $this->xml .= '</params></methodCall>';
+    }
+    function getLength() {
+        return strlen($this->xml);
+    }
+    function getXml() {
+        return $this->xml;
+    }
+}
+
+
+class IXR_Client {
+    var $server;
+    var $port;
+    var $path;
+    var $useragent;
+    var $response;
+    var $message = false;
+    var $debug = false;
+    // Storage place for an error message
+    var $error = false;
+    function IXR_Client($server, $path = false, $port = 80) {
+        if (!$path) {
+            // Assume we have been given a URL instead
+            $bits = parse_url($server);
+            $this->server = $bits['host'];
+            $this->port = isset($bits['port']) ? $bits['port'] : 80;
+            $this->path = isset($bits['path']) ? $bits['path'] : '/';
+            // Make absolutely sure we have a path
+            if (!$this->path) {
+                $this->path = '/';
+            }
+        } else {
+            $this->server = $server;
+            $this->path = $path;
+            $this->port = $port;
+        }
+        $this->useragent = 'The Incutio XML-RPC PHP Library';
+    }
+    function query() {
+        $args = func_get_args();
+        $method = array_shift($args);
+        $request = new IXR_Request($method, $args);
+        $length = $request->getLength();
+        $xml = $request->getXml();
+        $r = "\r\n";
+        $request  = "POST {$this->path} HTTP/1.0$r";
+        $request .= "Host: {$this->server}$r";
+        $request .= "Content-Type: text/xml$r";
+        $request .= "User-Agent: {$this->useragent}$r";
+        $request .= "Content-length: {$length}$r$r";
+        $request .= $xml;
+        // Now send the request
+        if ($this->debug) {
+            echo '<pre>'.htmlspecialchars($request)."\n</pre>\n\n";
+        }
+        $fp = @fsockopen($this->server, $this->port);
+        if (!$fp) {
+            $this->error = new IXR_Error(-32300, 'transport error - could not open socket');
+            return false;
+        }
+        fputs($fp, $request);
+        $contents = '';
+        $gotFirstLine = false;
+        $gettingHeaders = true;
+        while (!feof($fp)) {
+            $line = fgets($fp, 4096);
+            if (!$gotFirstLine) {
+                // Check line for '200'
+                if (strstr($line, '200') === false) {
+                    $this->error = new IXR_Error(-32300, 'transport error - HTTP status code was not 200');
+                    return false;
+                }
+                $gotFirstLine = true;
+            }
+            if (trim($line) == '') {
+                $gettingHeaders = false;
+            }
+            if (!$gettingHeaders) {
+                $contents .= trim($line)."\n";
+            }
+        }
+        if ($this->debug) {
+            echo '<pre>'.htmlspecialchars($contents)."\n</pre>\n\n";
+        }
+        // Now parse what we've got back
+        $this->message = new IXR_Message($contents);
+        if (!$this->message->parse()) {
+            // XML error
+            $this->error = new IXR_Error(-32700, 'parse error. not well formed');
+            return false;
+        }
+        // Is the message a fault?
+        if ($this->message->messageType == 'fault') {
+            $this->error = new IXR_Error($this->message->faultCode, $this->message->faultString);
+            return false;
+        }
+        // Message must be OK
+        return true;
+    }
+    function getResponse() {
+        // methodResponses can only have one param - return that
+        return $this->message->params[0];
+    }
+    function isError() {
+        return (is_object($this->error));
+    }
+    function getErrorCode() {
+        return $this->error->code;
+    }
+    function getErrorMessage() {
+        return $this->error->message;
+    }
+}
+
+
+class IXR_Error {
+    var $code;
+    var $message;
+    function IXR_Error($code, $message) {
+        $this->code = $code;
+        $this->message = $message;
+    }
+    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;
+    }
+}
+
+
+class IXR_Date {
+    var $year;
+    var $month;
+    var $day;
+    var $hour;
+    var $minute;
+    var $second;
+    function IXR_Date($time) {
+        // $time can be a PHP timestamp or an ISO one
+        if (is_numeric($time)) {
+            $this->parseTimestamp($time);
+        } else {
+            $this->parseIso($time);
+        }
+    }
+    function parseTimestamp($timestamp) {
+        $this->year = date('Y', $timestamp);
+        $this->month = date('Y', $timestamp);
+        $this->day = date('Y', $timestamp);
+        $this->hour = date('H', $timestamp);
+        $this->minute = date('i', $timestamp);
+        $this->second = date('s', $timestamp);
+    }
+    function parseIso($iso) {
+        $this->year = substr($iso, 0, 4);
+        $this->month = substr($iso, 4, 2); 
+        $this->day = substr($iso, 6, 2);
+        $this->hour = substr($iso, 9, 2);
+        $this->minute = substr($iso, 12, 2);
+        $this->second = substr($iso, 15, 2);
+    }
+    function getIso() {
+        return $this->year.$this->month.$this->day.'T'.$this->hour.':'.$this->minute.':'.$this->second;
+    }
+    function getXml() {
+        return '<dateTime.iso8601>'.$this->getIso().'</dateTime.iso8601>';
+    }
+    function getTimestamp() {
+        return mktime($this->hour, $this->minute, $this->second, $this->month, $this->day, $this->year);
+    }
+}
+
+class LLBlock {
+    var $data;
+    var $xml;
+
+    function LLBlock($data) {
+        $this->data = $data;
+    }
+
+    function getXml() {
+        if(count($this->data)>0) {
+            $this->xml="<array><data><value><struct>";
+            foreach($this->data as $name => $value) {
+                $this->xml=$this->xml."<member><name>".$name."</name><value><string>".$value."</string></value></member>";
+            }
+            $this->xml=$this->xml."</struct></value></data></array>";
+            return $this->xml;
+        }
+    }
+}
+
+class IXR_Base64 {
+    var $data;
+    function IXR_Base64($data) {
+        $this->data = $data;
+    }
+    function getXml() {
+        return '<base64>'.base64_encode($this->data).'</base64>';
+    }
+}
+
+
+class IXR_IntrospectionServer extends IXR_Server {
+    var $signatures;
+    var $help;
+    function IXR_IntrospectionServer() {
+        $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'
+        );
+        $this->addCallback(
+            'system.methodHelp', 
+            'this:methodHelp', 
+            array('string', 'string'), 
+            'Returns a documentation string for the specified method'
+        );
+    }
+    function addCallback($method, $callback, $args, $help) {
+        $this->callbacks[$method] = $callback;
+        $this->signatures[$method] = $args;
+        $this->help[$method] = $help;
+    }
+    function call($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
+        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, $argsbackup);
+    }
+    function methodSignature($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 $return;
+    }
+    function methodHelp($method) {
+        return $this->help[$method];
+    }
+}
+
+
+class IXR_ClientMulticall extends IXR_Client {
+    var $calls = array();
+    function IXR_ClientMulticall($server, $path = false, $port = 80) {
+        parent::IXR_Client($server, $path, $port);
+        $this->useragent = 'The Incutio XML-RPC PHP Library (multicall client)';
+    }
+    function addCall() {
+        $args = func_get_args();
+        $methodName = array_shift($args);
+        $struct = array(
+            'methodName' => $methodName,
+            'params' => $args
+        );
+        $this->calls[] = $struct;
+    }
+    function query() {
+        // Prepare multicall, then call the parent::query() method
+        return parent::query('system.multicall', $this->calls);
+    }
+}
+
+?>