<?php
// by Edd Dumbill (C) 1999-2002
// <edd@usefulinc.com>
// $Id: xmlrpcs.inc,v 1.2 2005/07/27 16:50:11 alejandro Exp $

// Copyright (c) 1999,2000,2002 Edd Dumbill.
// 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 the "XML-RPC for PHP" 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
// REGENTS 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.

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

	// listMethods: either a string, or nothing
	$_xmlrpcs_listMethods_sig=array(array($xmlrpcArray, $xmlrpcString), array($xmlrpcArray));
	$_xmlrpcs_listMethods_doc='This method lists all the methods that the XML-RPC server knows how to dispatch';
	function _xmlrpcs_listMethods($server, $m)
	{
		global $xmlrpcerr, $xmlrpcstr, $_xmlrpcs_dmap;
		$v=new xmlrpcval();
		$dmap=$server->dmap;
		$outAr=array();
		for(reset($dmap); list($key, $val)=each($dmap); )
		{
			$outAr[]=new xmlrpcval($key, 'string');
		}
		$dmap=$_xmlrpcs_dmap;
		for(reset($dmap); list($key, $val)=each($dmap); )
		{
			$outAr[]=new xmlrpcval($key, 'string');
		}
		$v->addArray($outAr);
		return new xmlrpcresp($v);
	}

	$_xmlrpcs_methodSignature_sig=array(array($xmlrpcArray, $xmlrpcString));
	$_xmlrpcs_methodSignature_doc='Returns an array of known signatures (an array of arrays) for the method name passed. If no signatures are known, returns a none-array (test for type != array to detect missing signature)';
	function _xmlrpcs_methodSignature($server, $m)
	{
		global $xmlrpcerr, $xmlrpcstr, $_xmlrpcs_dmap;

		$methName=$m->getParam(0);
		$methName=$methName->scalarval();
		if (ereg("^system\.", $methName))
		{
			$dmap=$_xmlrpcs_dmap; $sysCall=1;
		}
		else
		{
			$dmap=$server->dmap; $sysCall=0;
		}
		//	print "<!-- ${methName} -->\n";
		if (isset($dmap[$methName]))
		{
			if ($dmap[$methName]['signature'])
			{
				$sigs=array();
				$thesigs=$dmap[$methName]['signature'];
				for($i=0; $i<sizeof($thesigs); $i++)
				{
					$cursig=array();
					$inSig=$thesigs[$i];
					for($j=0; $j<sizeof($inSig); $j++)
					{
						$cursig[]=new xmlrpcval($inSig[$j], 'string');
					}
					$sigs[]=new xmlrpcval($cursig, 'array');
				}
				$r=new xmlrpcresp(new xmlrpcval($sigs, 'array'));
			}
			else
			{
				$r=new xmlrpcresp(new xmlrpcval('undef', 'string'));
			}
		}
		else
		{
			$r=new xmlrpcresp(0,$xmlrpcerr['introspect_unknown'], $xmlrpcstr['introspect_unknown']);
		}
		return $r;
	}

	$_xmlrpcs_methodHelp_sig=array(array($xmlrpcString, $xmlrpcString));
	$_xmlrpcs_methodHelp_doc='Returns help text if defined for the method passed, otherwise returns an empty string';
	function _xmlrpcs_methodHelp($server, $m)
	{
		global $xmlrpcerr, $xmlrpcstr, $_xmlrpcs_dmap;

		$methName=$m->getParam(0);
		$methName=$methName->scalarval();
		if (ereg("^system\.", $methName))
		{
			$dmap=$_xmlrpcs_dmap; $sysCall=1;
		}
		else
		{
			$dmap=$server->dmap; $sysCall=0;
		}
		// print "<!-- ${methName} -->\n";
		if (isset($dmap[$methName]))
		{
			if ($dmap[$methName]['docstring'])
			{
				$r=new xmlrpcresp(new xmlrpcval($dmap[$methName]['docstring']), 'string');
			}
			else
			{
				$r=new xmlrpcresp(new xmlrpcval('', 'string'));
			}
		}
		else
		{
			$r=new xmlrpcresp(0, $xmlrpcerr['introspect_unknown'], $xmlrpcstr['introspect_unknown']);
		}
		return $r;
	}

	$_xmlrpcs_multicall_sig = array(array($xmlrpcArray, $xmlrpcArray));
	$_xmlrpcs_multicall_doc = 'Boxcar multiple RPC calls in one request. See http://www.xmlrpc.com/discuss/msgReader$1208 for details';

	function _xmlrpcs_multicall_error($err)
	{
		if (is_string($err))
		{
			global $xmlrpcerr, $xmlrpcstr;
			$str  = $xmlrpcstr["multicall_${err}"];
			$code = $xmlrpcerr["multicall_${err}"];
		}
		else
		{
			$code = $err->faultCode();
			$str = $err->faultString();
		}
		$struct['faultCode'] = new xmlrpcval($code, 'int');
		$struct['faultString'] = new xmlrpcval($str, 'string');
		return new xmlrpcval($struct, 'struct');
	}

	function _xmlrpcs_multicall_do_call($server, $call)
	{
		if ($call->kindOf() != 'struct')
		{
			return _xmlrpcs_multicall_error('notstruct');
		}
		$methName = $call->structmem('methodName');
		if (!$methName)
		{
			return _xmlrpcs_multicall_error('nomethod');
		}
		if ($methName->kindOf() != 'scalar' || $methName->scalartyp() != 'string')
		{
			return _xmlrpcs_multicall_error('notstring');
		}
		if ($methName->scalarval() == 'system.multicall')
		{
			return _xmlrpcs_multicall_error('recursion');
		}

		$params = $call->structmem('params');
		if (!$params)
		{
			return _xmlrpcs_multicall_error('noparams');
		}
		if ($params->kindOf() != 'array')
		{
			return _xmlrpcs_multicall_error('notarray');
		}
		$numParams = $params->arraysize();

		$msg = new xmlrpcmsg($methName->scalarval());
		for ($i = 0; $i < $numParams; $i++)
		{
			$msg->addParam($params->arraymem($i));
		}

		$result = $server->execute($msg);

		if ($result->faultCode() != 0)
		{
			return _xmlrpcs_multicall_error($result);    // Method returned fault.
		}

		return new xmlrpcval(array($result->value()), 'array');
	}

	function _xmlrpcs_multicall($server, $m)
	{
		$calls = $m->getParam(0);
		$numCalls = $calls->arraysize();
		$result = array();

		for ($i = 0; $i < $numCalls; $i++)
		{
			$call = $calls->arraymem($i);
			$result[$i] = _xmlrpcs_multicall_do_call($server, $call);
		}

		return new xmlrpcresp(new xmlrpcval($result, 'array'));
	}

	$_xmlrpcs_dmap=array(
		'system.listMethods' => array(
			'function' => '_xmlrpcs_listMethods',
			'signature' => $_xmlrpcs_listMethods_sig,
			'docstring' => $_xmlrpcs_listMethods_doc),
		'system.methodHelp' => array(
			'function' => '_xmlrpcs_methodHelp',
			'signature' => $_xmlrpcs_methodHelp_sig,
			'docstring' => $_xmlrpcs_methodHelp_doc),
		'system.methodSignature' => array(
			'function' => '_xmlrpcs_methodSignature',
			'signature' => $_xmlrpcs_methodSignature_sig,
			'docstring' => $_xmlrpcs_methodSignature_doc),
		'system.multicall' => array(
			'function' => '_xmlrpcs_multicall',
			'signature' => $_xmlrpcs_multicall_sig,
			'docstring' => $_xmlrpcs_multicall_doc
		)
	);

	$_xmlrpc_debuginfo='';
	function xmlrpc_debugmsg($m)
	{
		global $_xmlrpc_debuginfo;
		$_xmlrpc_debuginfo=$_xmlrpc_debuginfo . $m . "\n";
	}

	class xmlrpc_server
	{
		var $dmap=array();

		function xmlrpc_server($dispMap='', $serviceNow=1)
		{
			global $HTTP_RAW_POST_DATA;
			// dispMap is a dispatch array of methods
			// mapped to function names and signatures
			// if a method
			// doesn't appear in the map then an unknown
			// method error is generated
			/* milosch - changed to make passing dispMap optional.
			 * instead, you can use the class add_to_map() function
			 * to add functions manually (borrowed from SOAPX4)
			 */
			if($dispMap)
			{
				$this->dmap = $dispMap;
				if($serviceNow)
				{
					$this->service();
				}
			}
		}

		function serializeDebug()
		{
			global $_xmlrpc_debuginfo;
			if ($_xmlrpc_debuginfo!='')
			{
				return "<!-- DEBUG INFO:\n\n" . $_xmlrpc_debuginfo . "\n-->\n";
			}
			else
			{
				return '';
			}
		}

		function service()
		{
			global $xmlrpc_defencoding;

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

		/*
		add a method to the dispatch map
		*/
		function add_to_map($methodname,$function,$sig,$doc)
		{
			$this->dmap[$methodname] = array(
				'function'  => $function,
				'signature' => $sig,
				'docstring' => $doc
			);
		}

		function verifySignature($in, $sig)
		{
			for($i=0; $i<sizeof($sig); $i++)
			{
				// check each possible signature in turn
				$cursig=$sig[$i];
				if (sizeof($cursig)==$in->getNumParams()+1)
				{
					$itsOK=1;
					for($n=0; $n<$in->getNumParams(); $n++)
					{
						$p=$in->getParam($n);
						// print "<!-- $p -->\n";
						if ($p->kindOf() == 'scalar')
						{
							$pt=$p->scalartyp();
						}
						else
						{
							$pt=$p->kindOf();
						}
						// $n+1 as first type of sig is return type
						if ($pt != $cursig[$n+1])
						{
							$itsOK=0;
							$pno=$n+1; $wanted=$cursig[$n+1]; $got=$pt;
							break;
						}
					}
					if ($itsOK)
					{
						return array(1);
					}
				}
			}
			return array(0, "Wanted ${wanted}, got ${got} at param ${pno})");
		}

		function parseRequest($data='')
		{
			global $_xh,$HTTP_RAW_POST_DATA;
			global $xmlrpcerr, $xmlrpcstr, $xmlrpcerrxml, $xmlrpc_defencoding,
			$_xmlrpcs_dmap;

			if ($data=='')
			{
				$data=$HTTP_RAW_POST_DATA;
			}
			$parser = xml_parser_create($xmlrpc_defencoding);

			$_xh[$parser]=array();
			$_xh[$parser]['st']='';
			$_xh[$parser]['cm']=0;
			$_xh[$parser]['isf']=0;
			$_xh[$parser]['params']=array();
			$_xh[$parser]['method']='';

			// decompose incoming XML into request structure

			xml_parser_set_option($parser, XML_OPTION_CASE_FOLDING, true);
			xml_set_element_handler($parser, 'xmlrpc_se', 'xmlrpc_ee');
			xml_set_character_data_handler($parser, 'xmlrpc_cd');
			xml_set_default_handler($parser, 'xmlrpc_dh');
			if (!xml_parse($parser, $data, 1))
			{
				// return XML error as a faultCode
				$r=new xmlrpcresp(0,
				$xmlrpcerrxml+xml_get_error_code($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($parser);
			}
			else
			{
				xml_parser_free($parser);
				$m=new xmlrpcmsg($_xh[$parser]['method']);
				// now add parameters in
				$plist='';
				for($i=0; $i<sizeof($_xh[$parser]['params']); $i++)
				{
					//print "<!-- " . $_xh[$parser]['params'][$i]. "-->\n";
					$plist.="$i - " .  $_xh[$parser]['params'][$i]. " \n";
					eval('$m->addParam(' . $_xh[$parser]['params'][$i]. ');');
				}
				// uncomment this to really see what the server's getting!
				// xmlrpc_debugmsg($plist);

				$r = $this->execute($m);
			}
			return $r;
		}

		function execute ($m)
		{
			global $xmlrpcerr, $xmlrpcstr, $_xmlrpcs_dmap;
			// now to deal with the method
			$methName = $m->method();
			$sysCall = ereg("^system\.", $methName);
			$dmap = $sysCall ? $_xmlrpcs_dmap : $this->dmap;

			if (!isset($dmap[$methName]['function']))
			{
				// No such method
				return new xmlrpcresp(0,
					$xmlrpcerr['unknown_method'],
					$xmlrpcstr['unknown_method']);
			}

			// Check signature.
			if (isset($dmap[$methName]['signature']))
			{
				$sig = $dmap[$methName]['signature'];
				list ($ok, $errstr) = $this->verifySignature($m, $sig);
				if (!$ok)
				{
					// Didn't match.
					return new xmlrpcresp(0,
						$xmlrpcerr['incorrect_params'],
						$xmlrpcstr['incorrect_params'] . ": ${errstr}");
				}
			}

			$func = $dmap[$methName]['function'];

			if ($sysCall)
			{
				return call_user_func($func, $this, $m);
			}
			else
			{
				return call_user_func($func, $m);
			}
		}

		function echoInput()
		{
			global $HTTP_RAW_POST_DATA;

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

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