JezK
Edit File: class-IXR-message.php
<?php /** * IXR_MESSAGE * * @package IXR * @since 1.5.0 * */ class IXR_Message { var $message = false; var $messageType = false; // methodCall / methodResponse / fault var $faultCode = false; var $faultString = false; var $methodName = ''; var $params = array(); // 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; /** * PHP5 constructor. */ function __construct( $message ) { $this->message =& $message; } /** * PHP4 constructor. */ public function IXR_Message( $message ) { self::__construct( $message ); } function parse() { if ( ! function_exists( 'xml_parser_create' ) ) { trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) ); return false; } // first remove the XML declaration // merged from WP #10698 - this method avoids the RAM usage of preg_replace on very large messages $header = preg_replace( '/<\?xml.*?\?'.'>/s', '', substr( $this->message, 0, 100 ), 1 ); $this->message = trim( substr_replace( $this->message, $header, 0, 100 ) ); if ( '' == $this->message ) { return false; } // Then remove the DOCTYPE $header = preg_replace( '/^<!DOCTYPE[^>]*+>/i', '', substr( $this->message, 0, 200 ), 1 ); $this->message = trim( substr_replace( $this->message, $header, 0, 200 ) ); if ( '' == $this->message ) { return false; } // Check that the root tag is valid $root_tag = substr( $this->message, 0, strcspn( substr( $this->message, 0, 20 ), "> \t\r\n" ) ); if ( '<!DOCTYPE' === strtoupper( $root_tag ) ) { return false; } if ( ! in_array( $root_tag, array( '<methodCall', '<methodResponse', '<fault' ) ) ) { return false; } // Bail if there are too many elements to parse $element_limit = 30000; if ( function_exists( 'apply_filters' ) ) { /** * Filters the number of elements to parse in an XML-RPC response. * * @since 4.0.0 * * @param int $element_limit Default elements limit. */ $element_limit = apply_filters( 'xmlrpc_element_limit', $element_limit ); } if ( $element_limit && 2 * $element_limit < substr_count( $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_element_handler($this->_parser, array($this, 'tag_open'), array($this, 'tag_close')); xml_set_character_data_handler($this->_parser, array($this, 'cdata')); // 256Kb, parse in chunks to avoid the RAM usage on very large messages $chunk_size = 262144; /** * Filters the chunk size that can be used to parse an XML-RPC response message. * * @since 4.4.0 * * @param int $chunk_size Chunk size to parse in bytes. */ $chunk_size = apply_filters( 'xmlrpc_chunk_parsing_size', $chunk_size ); $final = false; do { if (strlen($this->message) <= $chunk_size) { $final = true; } $part = substr($this->message, 0, $chunk_size); $this->message = substr($this->message, $chunk_size); if (!xml_parse($this->_parser, $part, $final)) { if (PHP_VERSION_ID < 80000) { // xml_parser_free() has no effect as of PHP 8.0. xml_parser_free($this->_parser); } unset($this->_parser); return false; } if ($final) { break; } } while (true); if (PHP_VERSION_ID < 80000) { // xml_parser_free() has no effect as of PHP 8.0. xml_parser_free($this->_parser); } unset($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->_currentTagContents = ''; $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); $valueFlag = true; break; case 'double': $value = (float)trim($this->_currentTagContents); $valueFlag = true; break; case 'string': $value = (string)trim($this->_currentTagContents); $valueFlag = true; break; case 'dateTime.iso8601': $value = new IXR_Date(trim($this->_currentTagContents)); $valueFlag = true; break; case 'value': // "If no type is indicated, the type is string." if (trim($this->_currentTagContents) != '') { $value = (string)$this->_currentTagContents; $valueFlag = true; } break; case 'boolean': $value = (bool)trim($this->_currentTagContents); $valueFlag = true; break; case 'base64': $value = base64_decode($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); break; case 'methodName': $this->methodName = trim($this->_currentTagContents); break; } if ($valueFlag) { if (count($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 parameter $this->params[] = $value; } } $this->_currentTagContents = ''; } }