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//usr/share/pear/XML/RPC/Server.php

<?php
// by Edd Dumbill (C) 1999,2000
// <edd@usefulinc.com>
// $Id: Server.php,v 1.2 2002/02/28 10:59:30 ssb Exp $

// License is granted to use or modify this software ("XML-RPC for PHP")
// for commercial or non-commercial use provided the copyright of the author
// is preserved in any distributed or derivative work.

// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESSED 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 AUTHOR 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.

// Adapted to PEAR standards by Stig Sæther Bakken <stig@php.net>

// XML RPC Server class
// requires: xmlrpc.inc

require_once "XML/RPC.php";

// listMethods: either a string, or nothing
$GLOBALS['XML_RPC_Server_listMethods_sig']=
    array(array($GLOBALS['XML_RPC_Array'], $GLOBALS['XML_RPC_String']), 
          array($GLOBALS['XML_RPC_Array']));
$GLOBALS['XML_RPC_Server_listMethods_doc']=
    'This method lists all the methods that the XML-RPC server knows how to dispatch';

$GLOBALS['XML_RPC_Server_methodSignature_sig']=
    array(array($GLOBALS['XML_RPC_Array'], $GLOBALS['XML_RPC_String']));
$GLOBALS['XML_RPC_Server_methodSignature_doc']=
    'Returns an array of known signatures (an array of arrays) for the method name passed. If no signatures are known, returns a none-array (test for type != array to detect missing signature)';

$GLOBALS['XML_RPC_Server_methodHelp_sig']=
    array(array($GLOBALS['XML_RPC_String'], $GLOBALS['XML_RPC_String']));
$GLOBALS['XML_RPC_Server_methodHelp_doc']=
    'Returns help text if defined for the method passed, otherwise returns an empty string';

$GLOBALS['XML_RPC_Server_dmap']=array(
    "system.listMethods" =>
    array("function" => "XML_RPC_Server_listMethods",
          "signature" => $GLOBALS['XML_RPC_Server_listMethods_sig'],
          "docstring" => $GLOBALS['XML_RPC_Server_listMethods_doc']),

"system.methodHelp" =>
    array("function" => "XML_RPC_Server_methodHelp",
          "signature" => $GLOBALS['XML_RPC_Server_methodHelp_sig'],
          "docstring" => $GLOBALS['XML_RPC_Server_methodHelp_doc']),

"system.methodSignature" =>
    array("function" => "XML_RPC_Server_methodSignature",
          "signature" => $GLOBALS['XML_RPC_Server_methodSignature_sig'],
          "docstring" => $GLOBALS['XML_RPC_Server_methodSignature_doc'])
);

$GLOBALS['XML_RPC_Server_debuginfo']="";

function XML_RPC_Server_debugmsg($m)
{
    global $XML_RPC_Server_debuginfo;
    $XML_RPC_Server_debuginfo=$XML_RPC_Server_debuginfo . $m . "\n";
}

class XML_RPC_Server
{
    var $dmap=array();

function XML_RPC_Server($dispMap, $serviceNow=1)
    {
        global $HTTP_RAW_POST_DATA;
        // dispMap is a despatch array of methods
        // mapped to function names and signatures
        // if a method
        // doesn't appear in the map then an unknown
        // method error is generated
        $this->dmap=$dispMap;
        if ($serviceNow) {
            $this->service();
        }
    }

function serializeDebug()
    {
        global $XML_RPC_Server_debuginfo;
        if ($XML_RPC_Server_debuginfo!="") 
            return "\n";
        else
            return "";
    }

function service()
    {
        $r=$this->parseRequest();
        $payload="<?xml version=\"1.0\"?>\n" . 
            $this->serializeDebug() .
            $r->serialize();
        Header("Content-type: text/xml\nContent-length: " . 
               strlen($payload));
        print $payload;
    }

function parseRequest($data="")
    {
        global $XML_RPC_xh,$HTTP_RAW_POST_DATA;
        global $XML_RPC_err, $XML_RPC_str, $XML_RPC_errxml,
            $XML_RPC_defencoding, $XML_RPC_Server_dmap;
        
        if ($data=="") {
            $data=$HTTP_RAW_POST_DATA;
        }
        $parser = xml_parser_create($XML_RPC_defencoding);
        
        $XML_RPC_xh[$parser]=array();
        $XML_RPC_xh[$parser]['isf']=0; 
        $XML_RPC_xh[$parser]['isf_reason'] = '';
        $XML_RPC_xh[$parser]['params']=array();
        $XML_RPC_xh[$parser]['method']="";
        $XML_RPC_xh[$parser]['stack'] = array();	
        $XML_RPC_xh[$parser]['valuestack'] = array();	
        
        $plist = '';

// decompose incoming XML into request structure
        
        xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
        xml_set_element_handler($parser, "XML_RPC_se", "XML_RPC_ee");
        xml_set_character_data_handler($parser, "XML_RPC_cd");
        xml_set_default_handler($parser, "XML_RPC_dh");
        if (!xml_parse($parser, $data, 1)) {
            // return XML error as a faultCode
            $r=new XML_RPC_Response(0,
                                    $XML_RPC_errxml+xml_get_error_code($parser),
                                    sprintf("XML error: %s at line %d",
                                            xml_error_string(xml_get_error_code($parser)),
                                            xml_get_current_line_number($parser)));
            xml_parser_free($parser);
        } else if ($XML_RPC_xh[$parser]['isf']>1) {
            $r = new XML_RPC_Response(0, $XML_RPC_err['invalid_request'],
                                          $XML_RPC_str['invalid_request']
                                              . ': ' . $XML_RPC_xh[$parser]['isf_reason']);
            xml_parser_free($parser);
        } else {
            xml_parser_free($parser);
            $m=new XML_RPC_Message($XML_RPC_xh[$parser]['method']);
            // now add parameters in
            for($i=0; $i<sizeof($XML_RPC_xh[$parser]['params']); $i++) {
                // print "\n";
                $plist .= "$i - " . var_export($XML_RPC_xh[$parser]['params'][$i], true) . " \n";
                @$m->addParam($XML_RPC_xh[$parser]['params'][$i]);
            }
            XML_RPC_Server_debugmsg($plist);
            // now to deal with the method
            $methName=$XML_RPC_xh[$parser]['method'];
            if (ereg("^system\.", $methName)) {
                $dmap=$XML_RPC_Server_dmap; $sysCall=1;
            } else {
                $dmap=$this->dmap; $sysCall=0;
            }
            if (isset($dmap[$methName]['function'])) {
                // dispatch if exists
                if (isset($dmap[$methName]['signature'])) {
                    $sr=$this->verifySignature($m, 
                                               $dmap[$methName]['signature'] );
                }
                if ( (!isset($dmap[$methName]['signature'])) || $sr[0]) {
                    // if no signature or correct signature
                    if ($sysCall) { 
                        eval('$r=' . $dmap[$methName]['function'] . 
                             '($this, $m);');
                    } else {
                        eval('$r=' . $dmap[$methName]['function'] . 
                             '($m);');
                    }
                } else {
                    $r=new XML_RPC_Response(0,
                                            $XML_RPC_err["incorrect_params"],
                                            $XML_RPC_str["incorrect_params"].": ". $sr[1]);
                }
            } else {
                // else prepare error response
                $r=new XML_RPC_Response(0,
                                        $XML_RPC_err["unknown_method"],
                                        $XML_RPC_str["unknown_method"]);
            }
        }
        return $r;
    }

function echoInput() {
        global $HTTP_RAW_POST_DATA;

// a debugging routine: just echos back the input
        // packet as a string value

$r=new XML_RPC_Response;
        $r->xv=new XML_RPC_Value( "'Aha said I: '" . $HTTP_RAW_POST_DATA, "string");
        print $r->serialize();
  }
}