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   1  <?php
   2  // by Edd Dumbill (C) 1999-2002
   3  // <edd@usefulinc.com>
   4  // $Original: xmlrpcs.inc,v 1.66 2006/09/17 21:25:06 ggiunta Exp $
   5  // $Id: xmlrpcs.inc.php 1199 2007-09-07 07:03:41Z kimitake $
   6  
   7  // Copyright (c) 1999,2000,2002 Edd Dumbill.
   8  // All rights reserved.
   9  //
  10  // Redistribution and use in source and binary forms, with or without
  11  // modification, are permitted provided that the following conditions
  12  // are met:
  13  //
  14  //    * Redistributions of source code must retain the above copyright
  15  //      notice, this list of conditions and the following disclaimer.
  16  //
  17  //    * Redistributions in binary form must reproduce the above
  18  //      copyright notice, this list of conditions and the following
  19  //      disclaimer in the documentation and/or other materials provided
  20  //      with the distribution.
  21  //
  22  //    * Neither the name of the "XML-RPC for PHP" nor the names of its
  23  //      contributors may be used to endorse or promote products derived
  24  //      from this software without specific prior written permission.
  25  //
  26  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  27  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  28  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  29  // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
  30  // REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  31  // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  32  // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  33  // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  34  // HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  35  // STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  36  // ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
  37  // OF THE POSSIBILITY OF SUCH DAMAGE.
  38  
  39      // XML RPC Server class
  40      // requires: xmlrpc.inc
  41  
  42      $GLOBALS['xmlrpcs_capabilities'] = array(
  43          // xmlrpc spec: always supported
  44          'xmlrpc' => new xmlrpcval(array(
  45              'specUrl' => new xmlrpcval('http://www.xmlrpc.com/spec', 'string'),
  46              'specVersion' => new xmlrpcval(1, 'int')
  47          ), 'struct'),
  48          // if we support system.xxx functions, we always support multicall, too...
  49          // Note that, as of 2006/09/17, the following URL does not respond anymore
  50          'system.multicall' => new xmlrpcval(array(
  51              'specUrl' => new xmlrpcval('http://www.xmlrpc.com/discuss/msgReader$1208', 'string'),
  52              'specVersion' => new xmlrpcval(1, 'int')
  53          ), 'struct'),
  54          // introspection: version 2! we support 'mixed', too
  55          'introspection' => new xmlrpcval(array(
  56              'specUrl' => new xmlrpcval('http://phpxmlrpc.sourceforge.net/doc-2/ch10.html', 'string'),
  57              'specVersion' => new xmlrpcval(2, 'int')
  58          ), 'struct')
  59      );
  60  
  61      /* Functions that implement system.XXX methods of xmlrpc servers */
  62      $_xmlrpcs_getCapabilities_sig=array(array($GLOBALS['xmlrpcStruct']));
  63      $_xmlrpcs_getCapabilities_doc='This method lists all the capabilites that the XML-RPC server has: the (more or less standard) extensions to the xmlrpc spec that it adheres to';
  64      $_xmlrpcs_getCapabilities_sdoc=array(array('list of capabilities, described as structs with a version number and url for the spec'));
  65  	function _xmlrpcs_getCapabilities($server, $m=null)
  66      {
  67          $outAr = $GLOBALS['xmlrpcs_capabilities'];
  68          // NIL extension
  69          if ($GLOBALS['xmlrpc_null_extension']) {
  70              $outAr['nil'] = new xmlrpcval(array(
  71                  'specUrl' => new xmlrpcval('http://www.ontosys.com/xml-rpc/extensions.php', 'string'),
  72                  'specVersion' => new xmlrpcval(1, 'int')
  73              ), 'struct');
  74          }
  75          return new xmlrpcresp(new xmlrpcval($outAr, 'struct'));
  76      }
  77  
  78      // listMethods: signature was either a string, or nothing.
  79      // The useless string variant has been removed
  80      $_xmlrpcs_listMethods_sig=array(array($GLOBALS['xmlrpcArray']));
  81      $_xmlrpcs_listMethods_doc='This method lists all the methods that the XML-RPC server knows how to dispatch';
  82      $_xmlrpcs_listMethods_sdoc=array(array('list of method names'));
  83  	function _xmlrpcs_listMethods($server, $m=null) // if called in plain php values mode, second param is missing
  84      {
  85  
  86          $outAr=array();
  87          foreach($server->dmap as $key => $val)
  88          {
  89              $outAr[]=&new xmlrpcval($key, 'string');
  90          }
  91          if($server->allow_system_funcs)
  92          {
  93              foreach($GLOBALS['_xmlrpcs_dmap'] as $key => $val)
  94              {
  95                  $outAr[]=&new xmlrpcval($key, 'string');
  96              }
  97          }
  98          return new xmlrpcresp(new xmlrpcval($outAr, 'array'));
  99      }
 100  
 101      $_xmlrpcs_methodSignature_sig=array(array($GLOBALS['xmlrpcArray'], $GLOBALS['xmlrpcString']));
 102      $_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)';
 103      $_xmlrpcs_methodSignature_sdoc=array(array('list of known signatures, each sig being an array of xmlrpc type names', 'name of method to be described'));
 104  	function _xmlrpcs_methodSignature($server, $m)
 105      {
 106          // let accept as parameter both an xmlrpcval or string
 107          if (is_object($m))
 108          {
 109              $methName=$m->getParam(0);
 110              $methName=$methName->scalarval();
 111          }
 112          else
 113          {
 114              $methName=$m;
 115          }
 116          if(strpos($methName, "system.") === 0)
 117          {
 118              $dmap=$GLOBALS['_xmlrpcs_dmap']; $sysCall=1;
 119          }
 120          else
 121          {
 122              $dmap=$server->dmap; $sysCall=0;
 123          }
 124          if(isset($dmap[$methName]))
 125          {
 126              if(isset($dmap[$methName]['signature']))
 127              {
 128                  $sigs=array();
 129                  foreach($dmap[$methName]['signature'] as $inSig)
 130                  {
 131                      $cursig=array();
 132                      foreach($inSig as $sig)
 133                      {
 134                          $cursig[]=&new xmlrpcval($sig, 'string');
 135                      }
 136                      $sigs[]=&new xmlrpcval($cursig, 'array');
 137                  }
 138                  $r=&new xmlrpcresp(new xmlrpcval($sigs, 'array'));
 139              }
 140              else
 141              {
 142                  // NB: according to the official docs, we should be returning a
 143                  // "none-array" here, which means not-an-array
 144                  $r=&new xmlrpcresp(new xmlrpcval('undef', 'string'));
 145              }
 146          }
 147          else
 148          {
 149              $r=&new xmlrpcresp(0,$GLOBALS['xmlrpcerr']['introspect_unknown'], $GLOBALS['xmlrpcstr']['introspect_unknown']);
 150          }
 151          return $r;
 152      }
 153  
 154      $_xmlrpcs_methodHelp_sig=array(array($GLOBALS['xmlrpcString'], $GLOBALS['xmlrpcString']));
 155      $_xmlrpcs_methodHelp_doc='Returns help text if defined for the method passed, otherwise returns an empty string';
 156      $_xmlrpcs_methodHelp_sdoc=array(array('method description', 'name of the method to be described'));
 157  	function _xmlrpcs_methodHelp($server, $m)
 158      {
 159          // let accept as parameter both an xmlrpcval or string
 160          if (is_object($m))
 161          {
 162              $methName=$m->getParam(0);
 163              $methName=$methName->scalarval();
 164          }
 165          else
 166          {
 167              $methName=$m;
 168          }
 169          if(strpos($methName, "system.") === 0)
 170          {
 171              $dmap=$GLOBALS['_xmlrpcs_dmap']; $sysCall=1;
 172          }
 173          else
 174          {
 175              $dmap=$server->dmap; $sysCall=0;
 176          }
 177          if(isset($dmap[$methName]))
 178          {
 179              if(isset($dmap[$methName]['docstring']))
 180              {
 181                  $r=&new xmlrpcresp(new xmlrpcval($dmap[$methName]['docstring']), 'string');
 182              }
 183              else
 184              {
 185                  $r=&new xmlrpcresp(new xmlrpcval('', 'string'));
 186              }
 187          }
 188          else
 189          {
 190              $r=&new xmlrpcresp(0, $GLOBALS['xmlrpcerr']['introspect_unknown'], $GLOBALS['xmlrpcstr']['introspect_unknown']);
 191          }
 192          return $r;
 193      }
 194  
 195      $_xmlrpcs_multicall_sig = array(array($GLOBALS['xmlrpcArray'], $GLOBALS['xmlrpcArray']));
 196      $_xmlrpcs_multicall_doc = 'Boxcar multiple RPC calls in one request. See http://www.xmlrpc.com/discuss/msgReader$1208 for details';
 197      $_xmlrpcs_multicall_sdoc = array(array('list of response structs, where each struct has the usual members', 'list of calls, with each call being represented as a struct, with members "methodname" and "params"'));
 198  	function _xmlrpcs_multicall_error($err)
 199      {
 200          if(is_string($err))
 201          {
 202              $str = $GLOBALS['xmlrpcstr']["multicall_$err}"];
 203              $code = $GLOBALS['xmlrpcerr']["multicall_$err}"];
 204          }
 205          else
 206          {
 207              $code = $err->faultCode();
 208              $str = $err->faultString();
 209          }
 210          $struct = array();
 211          $struct['faultCode'] =& new xmlrpcval($code, 'int');
 212          $struct['faultString'] =& new xmlrpcval($str, 'string');
 213          return new xmlrpcval($struct, 'struct');
 214      }
 215  
 216  	function _xmlrpcs_multicall_do_call($server, $call)
 217      {
 218          if($call->kindOf() != 'struct')
 219          {
 220              return _xmlrpcs_multicall_error('notstruct');
 221          }
 222          $methName = @$call->structmem('methodName');
 223          if(!$methName)
 224          {
 225              return _xmlrpcs_multicall_error('nomethod');
 226          }
 227          if($methName->kindOf() != 'scalar' || $methName->scalartyp() != 'string')
 228          {
 229              return _xmlrpcs_multicall_error('notstring');
 230          }
 231          if($methName->scalarval() == 'system.multicall')
 232          {
 233              return _xmlrpcs_multicall_error('recursion');
 234          }
 235  
 236          $params = @$call->structmem('params');
 237          if(!$params)
 238          {
 239              return _xmlrpcs_multicall_error('noparams');
 240          }
 241          if($params->kindOf() != 'array')
 242          {
 243              return _xmlrpcs_multicall_error('notarray');
 244          }
 245          $numParams = $params->arraysize();
 246  
 247          $msg =& new xmlrpcmsg($methName->scalarval());
 248          for($i = 0; $i < $numParams; $i++)
 249          {
 250              if(!$msg->addParam($params->arraymem($i)))
 251              {
 252                  $i++;
 253                  return _xmlrpcs_multicall_error(new xmlrpcresp(0,
 254                      $GLOBALS['xmlrpcerr']['incorrect_params'],
 255                      $GLOBALS['xmlrpcstr']['incorrect_params'] . ": probable xml error in param " . $i));
 256              }
 257          }
 258  
 259          $result = $server->execute($msg);
 260  
 261          if($result->faultCode() != 0)
 262          {
 263              return _xmlrpcs_multicall_error($result);        // Method returned fault.
 264          }
 265  
 266          return new xmlrpcval(array($result->value()), 'array');
 267      }
 268  
 269  	function _xmlrpcs_multicall_do_call_phpvals($server, $call)
 270      {
 271          if(!is_array($call))
 272          {
 273              return _xmlrpcs_multicall_error('notstruct');
 274          }
 275          if(!array_key_exists('methodName', $call))
 276          {
 277              return _xmlrpcs_multicall_error('nomethod');
 278          }
 279          if (!is_string($call['methodName']))
 280          {
 281              return _xmlrpcs_multicall_error('notstring');
 282          }
 283          if($call['methodName'] == 'system.multicall')
 284          {
 285              return _xmlrpcs_multicall_error('recursion');
 286          }
 287          if(!array_key_exists('params', $call))
 288          {
 289              return _xmlrpcs_multicall_error('noparams');
 290          }
 291          if(!is_array($call['params']))
 292          {
 293              return _xmlrpcs_multicall_error('notarray');
 294          }
 295  
 296          // this is a real dirty and simplistic hack, since we might have received a
 297          // base64 or datetime values, but they will be listed as strings here...
 298          $numParams = count($call['params']);
 299          $pt = array();
 300          foreach($call['params'] as $val)
 301              $pt[] = php_2_xmlrpc_type(gettype($val));
 302  
 303          $result = $server->execute($call['methodName'], $call['params'], $pt);
 304  
 305          if($result->faultCode() != 0)
 306          {
 307              return _xmlrpcs_multicall_error($result);        // Method returned fault.
 308          }
 309  
 310          return new xmlrpcval(array($result->value()), 'array');
 311      }
 312  
 313  	function _xmlrpcs_multicall($server, $m)
 314      {
 315          $result = array();
 316          // let accept a plain list of php parameters, beside a single xmlrpc msg object
 317          if (is_object($m))
 318          {
 319              $calls = $m->getParam(0);
 320              $numCalls = $calls->arraysize();
 321              for($i = 0; $i < $numCalls; $i++)
 322              {
 323                  $call = $calls->arraymem($i);
 324                  $result[$i] = _xmlrpcs_multicall_do_call($server, $call);
 325              }
 326          }
 327          else
 328          {
 329              $numCalls=count($m);
 330              for($i = 0; $i < $numCalls; $i++)
 331              {
 332                  $result[$i] = _xmlrpcs_multicall_do_call_phpvals($server, $m[$i]);
 333              }
 334          }
 335  
 336          return new xmlrpcresp(new xmlrpcval($result, 'array'));
 337      }
 338  
 339      $GLOBALS['_xmlrpcs_dmap']=array(
 340          'system.listMethods' => array(
 341              'function' => '_xmlrpcs_listMethods',
 342              'signature' => $_xmlrpcs_listMethods_sig,
 343              'docstring' => $_xmlrpcs_listMethods_doc,
 344              'signature_docs' => $_xmlrpcs_listMethods_sdoc),
 345          'system.methodHelp' => array(
 346              'function' => '_xmlrpcs_methodHelp',
 347              'signature' => $_xmlrpcs_methodHelp_sig,
 348              'docstring' => $_xmlrpcs_methodHelp_doc,
 349              'signature_docs' => $_xmlrpcs_methodHelp_sdoc),
 350          'system.methodSignature' => array(
 351              'function' => '_xmlrpcs_methodSignature',
 352              'signature' => $_xmlrpcs_methodSignature_sig,
 353              'docstring' => $_xmlrpcs_methodSignature_doc,
 354              'signature_docs' => $_xmlrpcs_methodSignature_sdoc),
 355          'system.multicall' => array(
 356              'function' => '_xmlrpcs_multicall',
 357              'signature' => $_xmlrpcs_multicall_sig,
 358              'docstring' => $_xmlrpcs_multicall_doc,
 359              'signature_docs' => $_xmlrpcs_multicall_sdoc),
 360          'system.getCapabilities' => array(
 361              'function' => '_xmlrpcs_getCapabilities',
 362              'signature' => $_xmlrpcs_getCapabilities_sig,
 363              'docstring' => $_xmlrpcs_getCapabilities_doc,
 364              'signature_docs' => $_xmlrpcs_getCapabilities_sdoc)
 365      );
 366  
 367      $GLOBALS['_xmlrpcs_occurred_errors'] = '';
 368      $GLOBALS['_xmlrpcs_prev_ehandler'] = '';
 369      /**
 370      * Error handler used to track errors that occur during server-side execution of PHP code.
 371      * This allows to report back to the client whether an internal error has occurred or not
 372      * using an xmlrpc response object, instead of letting the client deal with the html junk
 373      * that a PHP execution error on the server generally entails.
 374      *
 375      * NB: in fact a user defined error handler can only handle WARNING, NOTICE and USER_* errors.
 376      *
 377      */
 378  	function _xmlrpcs_errorHandler($errcode, $errstring, $filename=null, $lineno=null, $context=null)
 379      {
 380          // obey the @ protocol
 381          if (error_reporting() == 0)
 382              return;
 383  
 384          //if($errcode != E_NOTICE && $errcode != E_WARNING && $errcode != E_USER_NOTICE && $errcode != E_USER_WARNING)
 385          if($errcode != 2048) // do not use E_STRICT by name, since on PHP 4 it will not be defined
 386          {
 387              $GLOBALS['_xmlrpcs_occurred_errors'] = $GLOBALS['_xmlrpcs_occurred_errors'] . $errstring . "\n";
 388          }
 389          // Try to avoid as much as possible disruption to the previous error handling
 390          // mechanism in place
 391          if($GLOBALS['_xmlrpcs_prev_ehandler'] == '')
 392          {
 393              // The previous error handler was the default: all we should do is log error
 394              // to the default error log (if level high enough)
 395              if(ini_get('log_errors') && (intval(ini_get('error_reporting')) & $errcode))
 396              {
 397                  error_log($errstring);
 398              }
 399          }
 400          else
 401          {
 402              // Pass control on to previous error handler, trying to avoid loops...
 403              if($GLOBALS['_xmlrpcs_prev_ehandler'] != '_xmlrpcs_errorHandler')
 404              {
 405                  // NB: this code will NOT work on php < 4.0.2: only 2 params were used for error handlers
 406                  if(is_array($GLOBALS['_xmlrpcs_prev_ehandler']))
 407                  {
 408                      $GLOBALS['_xmlrpcs_prev_ehandler'][0]->$GLOBALS['_xmlrpcs_prev_ehandler'][1]($errcode, $errstring, $filename, $lineno, $context);
 409                  }
 410                  else
 411                  {
 412                      $GLOBALS['_xmlrpcs_prev_ehandler']($errcode, $errstring, $filename, $lineno, $context);
 413                  }
 414              }
 415          }
 416      }
 417  
 418      $GLOBALS['_xmlrpc_debuginfo']='';
 419  
 420      /**
 421      * Add a string to the debug info that can be later seralized by the server
 422      * as part of the response message.
 423      * Note that for best compatbility, the debug string should be encoded using
 424      * the $GLOBALS['xmlrpc_internalencoding'] character set.
 425      * @param string $m
 426      * @access public
 427      */
 428  	function xmlrpc_debugmsg($m)
 429      {
 430          $GLOBALS['_xmlrpc_debuginfo'] .= $m . "\n";
 431      }
 432  
 433      class xmlrpc_server
 434      {
 435          /// array defining php functions exposed as xmlrpc methods by this server
 436          var $dmap=array();
 437          /**
 438          * Defines how functions in dmap will be invokde: either using an xmlrpc msg object
 439          * or plain php values.
 440          * valid strings are 'xmlrpcvals', 'phpvals' or 'epivals'
 441          */
 442          var $functions_parameters_type='xmlrpcvals';
 443          /// controls wether the server is going to echo debugging messages back to the client as comments in response body. valid values: 0,1,2,3
 444          var $debug = 1;
 445          /**
 446          * When set to true, it will enable HTTP compression of the response, in case
 447          * the client has declared its support for compression in the request.
 448          */
 449          var $compress_response = false;
 450          /**
 451          * List of http compression methods accepted by the server for requests.
 452          * NB: PHP supports deflate, gzip compressions out of the box if compiled w. zlib
 453          */
 454          var $accepted_compression = array();
 455          /// shall we serve calls to system.* methods?
 456          var $allow_system_funcs = true;
 457          /// list of charset encodings natively accepted for requests
 458          var $accepted_charset_encodings = array();
 459          /**
 460          * charset encoding to be used for response.
 461          * NB: if we can, we will convert the generated response from internal_encoding to the intended one.
 462          * can be: a supported xml encoding (only UTF-8 and ISO-8859-1 at present, unless mbstring is enabled),
 463          * null (leave unspecified in response, convert output stream to US_ASCII),
 464          * 'default' (use xmlrpc library default as specified in xmlrpc.inc, convert output stream if needed),
 465          * or 'auto' (use client-specified charset encoding or same as request if request headers do not specify it (unless request is US-ASCII: then use library default anyway).
 466          * NB: pretty dangerous if you accept every charset and do not have mbstring enabled)
 467          */
 468          var $response_charset_encoding = '';
 469          /// storage for internal debug info
 470          var $debug_info = '';
 471          /// extra data passed at runtime to method handling functions. Used only by EPI layer
 472          var $user_data = null;
 473  
 474          /**
 475          * @param array $dispmap the dispatch map withd efinition of exposed services
 476          * @param boolean $servicenow set to false to prevent the server from runnung upon construction
 477          */
 478  		function xmlrpc_server($dispMap=null, $serviceNow=true)
 479          {
 480              // if ZLIB is enabled, let the server by default accept compressed requests,
 481              // and compress responses sent to clients that support them
 482              if(function_exists('gzinflate'))
 483              {
 484                  $this->accepted_compression = array('gzip', 'deflate');
 485                  $this->compress_response = true;
 486              }
 487  
 488              // by default the xml parser can support these 3 charset encodings
 489              $this->accepted_charset_encodings = array('UTF-8', 'ISO-8859-1', 'US-ASCII');
 490  
 491              // dispMap is a dispatch array of methods
 492              // mapped to function names and signatures
 493              // if a method
 494              // doesn't appear in the map then an unknown
 495              // method error is generated
 496              /* milosch - changed to make passing dispMap optional.
 497               * instead, you can use the class add_to_map() function
 498               * to add functions manually (borrowed from SOAPX4)
 499               */
 500              if($dispMap)
 501              {
 502                  $this->dmap = $dispMap;
 503                  if($serviceNow)
 504                  {
 505                      $this->service();
 506                  }
 507              }
 508          }
 509  
 510          /**
 511          * Set debug level of server.
 512          * @param integer $in debug lvl: determines info added to xmlrpc responses (as xml comments)
 513          * 0 = no debug info,
 514          * 1 = msgs set from user with debugmsg(),
 515          * 2 = add complete xmlrpc request (headers and body),
 516          * 3 = add also all processing warnings happened during method processing
 517          * (NB: this involves setting a custom error handler, and might interfere
 518          * with the standard processing of the php function exposed as method. In
 519          * particular, triggering an USER_ERROR level error will not halt script
 520          * execution anymore, but just end up logged in the xmlrpc response)
 521          * Note that info added at elevel 2 and 3 will be base64 encoded
 522          * @access public
 523          */
 524  		function setDebug($in)
 525          {
 526              $this->debug=$in;
 527          }
 528  
 529          /**
 530          * Return a string with the serialized representation of all debug info
 531          * @param string $charset_encoding the target charset encoding for the serialization
 532          * @return string an XML comment (or two)
 533          */
 534  		function serializeDebug($charset_encoding='')
 535          {
 536              // Tough encoding problem: which internal charset should we assume for debug info?
 537              // It might contain a copy of raw data received from client, ie with unknown encoding,
 538              // intermixed with php generated data and user generated data...
 539              // so we split it: system debug is base 64 encoded,
 540              // user debug info should be encoded by the end user using the INTERNAL_ENCODING
 541              $out = '';
 542              if ($this->debug_info != '')
 543              {
 544                  $out .= "<!-- SERVER DEBUG INFO (BASE64 ENCODED):\n".base64_encode($this->debug_info)."\n-->\n";
 545              }
 546              if($GLOBALS['_xmlrpc_debuginfo']!='')
 547              {
 548  
 549                  $out .= "<!-- DEBUG INFO:\n" . xmlrpc_encode_entitites(str_replace('--', '_-', $GLOBALS['_xmlrpc_debuginfo']), $GLOBALS['xmlrpc_internalencoding'], $charset_encoding) . "\n-->\n";
 550                  // NB: a better solution MIGHT be to use CDATA, but we need to insert it
 551                  // into return payload AFTER the beginning tag
 552                  //$out .= "<![CDATA[ DEBUG INFO:\n\n" . str_replace(']]>', ']_]_>', $GLOBALS['_xmlrpc_debuginfo']) . "\n]]>\n";
 553              }
 554              return $out;
 555          }
 556  
 557          /**
 558          * Execute the xmlrpc request, printing the response
 559          * @param string $data the request body. If null, the http POST request will be examined
 560          * @return xmlrpcresp the response object (usually not used by caller...)
 561          * @access public
 562          */
 563  		function service($data=null, $return_payload=false)
 564          {
 565              if ($data === null)
 566              {
 567                  $data = isset($GLOBALS['HTTP_RAW_POST_DATA']) ? $GLOBALS['HTTP_RAW_POST_DATA'] : '';
 568              }
 569              $raw_data = $data;
 570  
 571              // reset internal debug info
 572              $this->