<?php
/*
An XML-RPC implementation by Keith Devens, version 2.5f.
http://www.keithdevens.com/software/xmlrpc/

Release history available at:
http://www.keithdevens.com/software/xmlrpc/history/

This code is Open Source, released under terms similar to the Artistic License.
Read the license at http://www.keithdevens.com/software/license/

Note: this code requires version 4.1.0 or higher of PHP.
*/

function & XML_serialize(&$data, $level = 0, $prior_key = NULL){
    #assumes a hash, keys are the variable names
    $xml_serialized_string = "";
    while(list($key, $value) = each($data)){
        $inline = false;
        $numeric_array = false;
        $attributes = "";
        #echo "My current key is '$key', called with prior key '$prior_key'<br>";
        if(!strstr($key, " attr")){ #if it's not an attribute
            if(array_key_exists("$key attr", $data)){
                while(list($attr_name, $attr_value) = each($data["$key attr"])){
                    #echo "Found attribute $attribute_name with value $attribute_value<br>";
                    $attr_value = &htmlspecialchars($attr_value, ENT_QUOTES);
                    $attributes .= " $attr_name=\"$attr_value\"";
                }
            }

            if(is_numeric($key)){
                #echo "My current key ($key) is numeric. My parent key is '$prior_key'<br>";
                $key = $prior_key;
            }else{
                #you can't have numeric keys at two levels in a row, so this is ok
                #echo "Checking to see if a numeric key exists in data.";
                if(is_array($value) and array_key_exists(0, $value)){
                #   echo " It does! Calling myself as a result of a numeric array.<br>";
                    $numeric_array = true;
                    $xml_serialized_string .= XML_serialize($value, $level, $key);
                }
                #echo "<br>";
            }

            if(!$numeric_array){
                $xml_serialized_string .= str_repeat("\t", $level) . "<$key$attributes>";

                if(is_array($value)){
                    $xml_serialized_string .= "\r\n" . XML_serialize($value, $level+1);
                }else{
                    $inline = true;
                    $xml_serialized_string .= htmlspecialchars($value);
                }

                $xml_serialized_string .= (!$inline ? str_repeat("\t", $level) : "") . "</$key>\r\n";
            }
        }else{
            #echo "Skipping attribute record for key $key<bR>";
        }
    }
    if($level == 0){
        $xml_serialized_string = "<?xml version=\"1.0\" ?>\r\n" . $xml_serialized_string;
        return $xml_serialized_string;
    }else{
        return $xml_serialized_string;
    }
}

class XML {
    var $parser; #a reference to the XML parser
    var $document; #the entire XML structure built up so far
    var $current; #a pointer to the current item - what is this
    var $parent; #a pointer to the current parent - the parent will be an array
    var $parents; #an array of the most recent parent at each level

    var $last_opened_tag;

    function XML($data=null){
        $this->parser = xml_parser_create();

        xml_parser_set_option ($this->parser, XML_OPTION_CASE_FOLDING, 0);
        xml_set_object($this->parser, &$this);
        xml_set_element_handler($this->parser, "open", "close");
        xml_set_character_data_handler($this->parser, "data");
#       register_shutdown_function(array(&$this, 'destruct'));
    }

    function destruct(){
        xml_parser_free($this->parser);
    }

    function parse($data){
        $this->document = array();
        $this->parent = &$this->document;
        $this->parents = array();
        $this->last_opened_tag = NULL;
        xml_parse($this->parser, $data);
        return $this->document;
    }

    function open($parser, $tag, $attributes){
        #echo "Opening tag $tag<br>\n";
        $this->data = "";
        $this->last_opened_tag = $tag; #tag is a string
        if(array_key_exists($tag, $this->parent)){
            #echo "There's already an instance of '$tag' at the current level ($level)<br>\n";
            if(is_array($this->parent[$tag]) and array_key_exists(0, $this->parent[$tag])){ #if the keys are numeric
                #need to make sure they're numeric (account for attributes)
                $key = count_numeric_items($this->parent[$tag]);
                #echo "There are $key instances: the keys are numeric.<br>\n";
            }else{
                #echo "There is only one instance. Shifting everything around<br>\n";
                $temp = &$this->parent[$tag];
                unset($this->parent[$tag]);
                $this->parent[$tag][0] = &$temp;

                if(array_key_exists("$tag attr", $this->parent)){
                    #shift the attributes around too if they exist
                    $temp = &$this->parent["$tag attr"];
                    unset($this->parent["$tag attr"]);
                    $this->parent[$tag]["0 attr"] = &$temp;
                }
                $key = 1;
            }
            $this->parent = &$this->parent[$tag];
        }else{
            $key = $tag;
        }
        if($attributes){
            $this->parent["$key attr"] = $attributes;
        }

        $this->parent[$key] = array();
        $this->parent = &$this->parent[$key];
        array_unshift($this->parents, &$this->parent);
    }

    function data($parser, $data){
        #echo "Data is '", htmlspecialchars($data), "'<br>\n";
        if($this->last_opened_tag != NULL){
            $this->data .= $data;
        }
    }

    function close($parser, $tag){
        #echo "Close tag $tag<br>\n";
        if($this->last_opened_tag == $tag){
            $this->parent = $this->data;
            $this->last_opened_tag = NULL;
        }
        array_shift($this->parents);
        $this->parent = &$this->parents[0];
    }
}

function & XML_unserialize(&$xml){
    $xml_parser = new XML();
    $data = &$xml_parser->parse(&$xml);
    $xml_parser->destruct();
    return $data;
}

function & XMLRPC_parse(&$request){
    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_parse', "<p>Received the following raw request:</p>" . XMLRPC_show($request, 'print_r', true));
    }
    $data = &XML_unserialize(&$request);
    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_parse', "<p>Returning the following parsed request:</p>" . XMLRPC_show($data, 'print_r', true));
    }
    return $data;
}

function & XMLRPC_prepare($data, $type = NULL){
    if(is_array($data)){
        $num_elements = count($data);
        if((array_key_exists(0, $data) or !$num_elements) and $type != 'struct'){ #it's an array
            if(!$num_elements){ #if the array is empty
                $returnvalue =  array('array' => array('data' => NULL));
            }else{
                $returnvalue['array']['data']['value'] = array();
                $temp = &$returnvalue['array']['data']['value'];
                $count = count_numeric_items($data);
                for($n=0; $n<$count; $n++){
                    $type = NULL;
                    if(array_key_exists("$n type", $data)){
                        $type = $data["$n type"];
                    }
                    $temp[$n] = XMLRPC_prepare(&$data[$n], $type);
                }
            }
        }else{ #it's a struct
            if(!$num_elements){ #if the struct is empty
                $returnvalue = array('struct' => NULL);
            }else{
                $returnvalue['struct']['member'] = array();
                $temp = &$returnvalue['struct']['member'];
                while(list($key, $value) = each($data)){
                    if(substr($key, -5) != ' type'){ #if it's not a type specifier
                        $type = NULL;
                        if(array_key_exists("$key type", $data)){
                            $type = $data["$key type"];
                        }
                        $temp[] = array('name' => $key, 'value' => XMLRPC_prepare(&$value, $type));
                    }
                }
            }
        }
    }else{ #it's a scalar
        if(!$type){
            if(is_int($data)){
                $returnvalue['int'] = $data;
                return $returnvalue;
            }elseif(is_float($data)){
                $returnvalue['double'] = $data;
                return $returnvalue;
            }elseif(is_bool($data)){
                $returnvalue['boolean'] = ($data ? 1 : 0);
                return $returnvalue;
            }elseif(preg_match('/^\d{8}T\d{2}:\d{2}:\d{2}$/', $data, $matches)){ #it's a date
                $returnvalue['dateTime.iso8601'] = $data;
                return $returnvalue;
            }elseif(is_string($data)){
                $returnvalue['string'] = htmlspecialchars($data);
                return $returnvalue;
            }
        }else{
            $returnvalue[$type] = htmlspecialchars($data);
        }
    }
    return $returnvalue;
}

function & XMLRPC_adjustValue(&$current_node){
    if(is_array($current_node)){
        if(isset($current_node['array'])){
            if(!is_array($current_node['array']['data'])){
                #If there are no elements, return an empty array
                return array();
            }else{
                #echo "Getting rid of array -> data -> value<br>\n";
                $temp = &$current_node['array']['data']['value'];
                if(is_array($temp) and array_key_exists(0, $temp)){
                    $count = count($temp);
                    for($n=0;$n<$count;$n++){
                        $temp2[$n] = &XMLRPC_adjustValue(&$temp[$n]);
                    }
                    $temp = &$temp2;
                }else{
                    $temp2 = &XMLRPC_adjustValue(&$temp);
                    $temp = array(&$temp2);
                    #I do the temp assignment because it avoids copying,
                    # since I can put a reference in the array
                    #PHP's reference model is a bit silly, and I can't just say:
                    # $temp = array(&XMLRPC_adjustValue(&$temp));
                }
            }
        }elseif(isset($current_node['struct'])){
            if(!is_array($current_node['struct'])){
                #If there are no members, return an empty array
                return array();
            }else{
                #echo "Getting rid of struct -> member<br>\n";
                $temp = &$current_node['struct']['member'];
                if(is_array($temp) and array_key_exists(0, $temp)){
                    $count = count($temp);
                    for($n=0;$n<$count;$n++){
                        #echo "Passing name {$temp[$n][name]}. Value is: " . show($temp[$n][value], var_dump, true) . "<br>\n";
                        $temp2[$temp[$n]['name']] = &XMLRPC_adjustValue(&$temp[$n]['value']);
                        #echo "adjustValue(): After assigning, the value is " . show($temp2[$temp[$n]['name']], var_dump, true) . "<br>\n";
                    }
                }else{
                    #echo "Passing name $temp[name]<br>\n";
                    $temp2[$temp['name']] = &XMLRPC_adjustValue(&$temp['value']);
                }
                $temp = &$temp2;
            }
        }else{
            $types = array('string', 'int', 'i4', 'double', 'dateTime.iso8601', 'base64', 'boolean');
            $fell_through = true;
            foreach($types as $type){
                if(array_key_exists($type, $current_node)){
                    #echo "Getting rid of '$type'<br>\n";
                    $temp = &$current_node[$type];
                    #echo "adjustValue(): The current node is set with a type of $type<br>\n";
                    $fell_through = false;
                    break;
                }
            }
            if($fell_through){
                $type = 'string';
                #echo "Fell through! Type is $type<br>\n";
            }
            switch ($type){
                case 'int': case 'i4': $temp = (int)$temp;    break;
                case 'string':         $temp = (string)$temp; break;
                case 'double':         $temp = (double)$temp; break;
                case 'boolean':        $temp = (bool)$temp;   break;
            }
        }
    }else{
        $temp = (string)$current_node;
    }
    return $temp;
}

function XMLRPC_getParams($request){
    if(!is_array($request['methodCall']['params'])){
        #If there are no parameters, return an empty array
        return array();
    }else{
        #echo "Getting rid of methodCall -> params -> param<br>\n";
        $temp = &$request['methodCall']['params']['param'];
        if(is_array($temp) and array_key_exists(0, $temp)){
            $count = count($temp);
            for($n = 0; $n < $count; $n++){
                #echo "Serializing parameter $n<br>";
                $temp2[$n] = &XMLRPC_adjustValue(&$temp[$n]['value']);
            }
        }else{
            $temp2[0] = &XMLRPC_adjustValue($temp['value']);
        }
        $temp = &$temp2;
        return $temp;
    }
}

function XMLRPC_getMethodName($methodCall){
    #returns the method name
    return $methodCall['methodCall']['methodName'];
}

function XMLRPC_request($site, $location, $methodName, $params = NULL, $user_agent = NULL){
    $site = explode(':', $site);
    if(isset($site[1]) and is_numeric($site[1])){
        $port = $site[1];
    }else{
        $port = 80;
    }
    $site = $site[0];

    $data["methodCall"]["methodName"] = $methodName;
    $param_count = count($params);
    if(!$param_count){
        $data["methodCall"]["params"] = NULL;
    }else{
        for($n = 0; $n<$param_count; $n++){
            $data["methodCall"]["params"]["param"][$n]["value"] = $params[$n];
        }
    }
    $data = XML_serialize($data);

    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_request', "<p>Received the following parameter list to send:</p>" . XMLRPC_show($params, 'print_r', true));
    }
    $conn = fsockopen ($site, $port); #open the connection
    if(!$conn){ #if the connection was not opened successfully
        if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
            XMLRPC_debug('XMLRPC_request', "<p>Connection failed: Couldn't make the connection to $site.</p>");
        }
        return array(false, array('faultCode'=>10532, 'faultString'=>"Connection failed: Couldn't make the connection to $site."));
    }else{
        $headers =
            "POST $location HTTP/1.0\r\n" .
            "Host: $site\r\n" .
            "Connection: close\r\n" .
            ($user_agent ? "User-Agent: $user_agent\r\n" : '') .
            "Content-Type: text/xml\r\n" .
            "Content-Length: " . strlen($data) . "\r\n\r\n";

        fputs($conn, "$headers");
        fputs($conn, $data);

        if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
            XMLRPC_debug('XMLRPC_request', "<p>Sent the following request:</p>\n\n" . XMLRPC_show($headers . $data, 'print_r', true));
        }

        #socket_set_blocking ($conn, false);
        $response = "";
        while(!feof($conn)){
            $response .= fgets($conn, 1024);
        }
        fclose($conn);

        #strip headers off of response

        $responsesubstr = substr($response, strpos($response, "\r\n\r\n")+4);
        $data = XML_unserialize($responsesubstr);

        if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
            XMLRPC_debug('XMLRPC_request', "<p>Received the following response:</p>\n\n" . XMLRPC_show($response, 'print_r', true) . "<p>Which was serialized into the following data:</p>\n\n" . XMLRPC_show($data, 'print_r', true));
        }
        if(isset($data['methodResponse']['fault'])){
            $return =  array(false, XMLRPC_adjustValue(&$data['methodResponse']['fault']['value']));
            if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
                XMLRPC_debug('XMLRPC_request', "<p>Returning:</p>\n\n" . XMLRPC_show($return, 'var_dump', true));
            }
            return $return;
        }else{
            $return = array(true, XMLRPC_adjustValue(&$data['methodResponse']['params']['param']['value']));
            if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
                XMLRPC_debug('XMLRPC_request', "<p>Returning:</p>\n\n" . XMLRPC_show($return, 'var_dump', true));
            }
            return $return;
        }
    }
}

function XMLRPC_response($return_value, $server = NULL){
    $data["methodResponse"]["params"]["param"]["value"] = &$return_value;
    $return = XML_serialize(&$data);

    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_response', "<p>Received the following data to return:</p>\n\n" . XMLRPC_show($return_value, 'print_r', true));
    }

    header("Connection: close");
    header("Content-Length: " . strlen($return));
    header("Content-Type: text/xml");
    header("Date: " . date("r"));
    if($server){
        header("Server: $server");
    }

    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_response', "<p>Sent the following response:</p>\n\n" . XMLRPC_show($return, 'print_r', true));
    }
    echo $return;
}

function XMLRPC_error($faultCode, $faultString, $server = NULL){
    $array["methodResponse"]["fault"]["value"]["struct"]["member"] = array();
    $temp = &$array["methodResponse"]["fault"]["value"]["struct"]["member"];
    $temp[0]["name"] = "faultCode";
    $temp[0]["value"]["int"] = $faultCode;
    $temp[1]["name"] = "faultString";
    $temp[1]["value"]["string"] = $faultString;

    $return = XML_serialize($array);

    header("Connection: close");
    header("Content-Length: " . strlen($return));
    header("Content-Type: text/xml");
    header("Date: " . date("r"));
    if($server){
        header("Server: $server");
    }
    if(defined('XMLRPC_DEBUG') and XMLRPC_DEBUG){
        XMLRPC_debug('XMLRPC_error', "<p>Sent the following error response:</p>\n\n" . XMLRPC_show($return, 'print_r', true));
    }
    echo $return;
}

function XMLRPC_convert_timestamp_to_iso8601($timestamp){
    #takes a unix timestamp and converts it to iso8601 required by XMLRPC
    #an example iso8601 datetime is "20010822T03:14:33"
    return date("Ymd\TH:i:s", $timestamp);
}

function XMLRPC_convert_iso8601_to_timestamp($iso8601){
    return strtotime($iso8601);
}

function count_numeric_items(&$array){
    return is_array($array) ? count(array_filter(array_keys($array), 'is_numeric')) : 0;
}

function XMLRPC_debug($function_name, $debug_message){
    $GLOBALS['XMLRPC_DEBUG_INFO'][] = array($function_name, $debug_message);
}

function XMLRPC_debug_print(){
    if($GLOBALS['XMLRPC_DEBUG_INFO']){
        echo "<table border=\"1\" width=\"100%\">\n";
        foreach($GLOBALS['XMLRPC_DEBUG_INFO'] as $debug){
            echo "<tr><th style=\"vertical-align: top\">$debug[0]</th><td>$debug[1]</td></tr>\n";
        }
        echo "</table>\n";
        unset($GLOBALS['XMLRPC_DEBUG_INFO']);
    }else{
        echo "<p>No debugging information available yet.</p>";
    }
}

function XMLRPC_show($data, $func = "print_r", $return_str = false){
    ob_start();
    $func($data);
    $output = ob_get_contents();
    ob_end_clean();
    if($return_str){
        return "<pre>" . htmlspecialchars($output) . "</pre>\n";
    }else{
        echo "<pre>", htmlspecialchars($output), "</pre>\n";
    }
}

?>