--- /dev/null
+<?php
+
+/**
+ * IXR_MESSAGE
+ *
+ * @package IXR
+ * @since 1.5.0
+ *
+ */
+class IXR_Message
+{
+ var $message;
+ var $messageType; // methodCall / methodResponse / fault
+ var $faultCode;
+ var $faultString;
+ var $methodName;
+ var $params;
+
+ // 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_object($this->_parser, $this);
+ xml_set_element_handler($this->_parser, 'tag_open', 'tag_close');
+ xml_set_character_data_handler($this->_parser, '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 reponse 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, $final)) {
+ return false;
+ }
+ if ($final) {
+ break;
+ }
+ } while (true);
+ xml_parser_free($this->_parser);
+
+ // Grab the error messages, if any
+ if ($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':
+ $value = (double)trim($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':
+ $value = (boolean)trim($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 = '';
+ }
+}
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