class.soap_parser.php
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<?php
/**
*
* soap_parser class parses SOAP XML messages into native PHP values
*
* @author Dietrich Ayala <dietrich@ganx4.com>
* @version $Id: class.soap_parser.php,v 1.36 2005/08/04 01:27:42 snichol Exp $
* @access public
*/
class soap_parser extends nusoap_base {
var $xml = '';
var $xml_encoding = '';
var $method = '';
var $root_struct = '';
var $root_struct_name = '';
var $root_struct_namespace = '';
var $root_header = '';
var $document = ''; // incoming SOAP body (text)
// determines where in the message we are (envelope,header,body,method)
var $status = '';
var $position = 0;
var $depth = 0;
var $default_namespace = '';
var $namespaces = array();
var $message = array();
var $parent = '';
var $fault = false;
var $fault_code = '';
var $fault_str = '';
var $fault_detail = '';
var $depth_array = array();
var $debug_flag = true;
var $soapresponse = NULL;
var $responseHeaders = ''; // incoming SOAP headers (text)
var $body_position = 0;
// for multiref parsing:
// array of id => pos
var $ids = array();
// array of id => hrefs => pos
var $multirefs = array();
// toggle for auto-decoding element content
var $decode_utf8 = true;
/**
* constructor that actually does the parsing
*
* @param string $xml SOAP message
* @param string $encoding character encoding scheme of message
* @param string $method method for which XML is parsed (unused?)
* @param string $decode_utf8 whether to decode UTF-8 to ISO-8859-1
* @access public
*/
function soap_parser($xml,$encoding='UTF-8',$method='',$decode_utf8=true){
parent::nusoap_base();
$this->xml = $xml;
$this->xml_encoding = $encoding;
$this->method = $method;
$this->decode_utf8 = $decode_utf8;
// Check whether content has been read.
if(!empty($xml)){
// Check XML encoding
$pos_xml = strpos($xml, '<?xml');
if ($pos_xml !== FALSE) {
$xml_decl = substr($xml, $pos_xml, strpos($xml, '?>', $pos_xml + 2) - $pos_xml + 1);
if (preg_match("/encoding=[\"']([^\"']*)[\"']/", $xml_decl, $res)) {
$xml_encoding = $res[1];
if (strtoupper($xml_encoding) != $encoding) {
$err = "Charset from HTTP Content-Type '" . $encoding . "' does not match encoding from XML declaration '" . $xml_encoding . "'";
$this->debug($err);
if ($encoding != 'ISO-8859-1' || strtoupper($xml_encoding) != 'UTF-8') {
$this->setError($err);
return;
}
// when HTTP says ISO-8859-1 (the default) and XML says UTF-8 (the typical), assume the other endpoint is just sloppy and proceed
} else {
$this->debug('Charset from HTTP Content-Type matches encoding from XML declaration');
}
} else {
$this->debug('No encoding specified in XML declaration');
}
} else {
$this->debug('No XML declaration');
}
$this->debug('Entering soap_parser(), length='.strlen($xml).', encoding='.$encoding);
// Create an XML parser - why not xml_parser_create_ns?
$this->parser = xml_parser_create($this->xml_encoding);
// Set the options for parsing the XML data.
//xml_parser_set_option($parser, XML_OPTION_SKIP_WHITE, 1);
xml_parser_set_option($this->parser, XML_OPTION_CASE_FOLDING, 0);
xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, $this->xml_encoding);
// Set the object for the parser.
xml_set_object($this->parser, $this);
// Set the element handlers for the parser.
xml_set_element_handler($this->parser, 'start_element','end_element');
xml_set_character_data_handler($this->parser,'character_data');
// Parse the XML file.
if(!xml_parse($this->parser,$xml,true)){
// Display an error message.
$err = sprintf('XML error parsing SOAP payload on line %d: %s',
xml_get_current_line_number($this->parser),
xml_error_string(xml_get_error_code($this->parser)));
$this->debug($err);
$this->debug("XML payload:\n" . $xml);
$this->setError($err);
} else {
$this->debug('parsed successfully, found root struct: '.$this->root_struct.' of name '.$this->root_struct_name);
// get final value
$this->soapresponse = $this->message[$this->root_struct]['result'];
// get header value: no, because this is documented as XML string
// if($this->root_header != '' && isset($this->message[$this->root_header]['result'])){
// $this->responseHeaders = $this->message[$this->root_header]['result'];
// }
// resolve hrefs/ids
if(sizeof($this->multirefs) > 0){
foreach($this->multirefs as $id => $hrefs){
$this->debug('resolving multirefs for id: '.$id);
$idVal = $this->buildVal($this->ids[$id]);
if (is_array($idVal) && isset($idVal['!id'])) {
unset($idVal['!id']);
}
foreach($hrefs as $refPos => $ref){
$this->debug('resolving href at pos '.$refPos);
$this->multirefs[$id][$refPos] = $idVal;
}
}
}
}
xml_parser_free($this->parser);
} else {
$this->debug('xml was empty, didn\'t parse!');
$this->setError('xml was empty, didn\'t parse!');
}
}
/**
* start-element handler
*
* @param resource $parser XML parser object
* @param string $name element name
* @param array $attrs associative array of attributes
* @access private
*/
function start_element($parser, $name, $attrs) {
// position in a total number of elements, starting from 0
// update class level pos
$pos = $this->position++;
// and set mine
$this->message[$pos] = array('pos' => $pos,'children'=>'','cdata'=>'');
// depth = how many levels removed from root?
// set mine as current global depth and increment global depth value
$this->message[$pos]['depth'] = $this->depth++;
// else add self as child to whoever the current parent is
if($pos != 0){
$this->message[$this->parent]['children'] .= '|'.$pos;
}
// set my parent
$this->message[$pos]['parent'] = $this->parent;
// set self as current parent
$this->parent = $pos;
// set self as current value for this depth
$this->depth_array[$this->depth] = $pos;
// get element prefix
if(strpos($name,':')){
// get ns prefix
$prefix = substr($name,0,strpos($name,':'));
// get unqualified name
$name = substr(strstr($name,':'),1);
}
// set status
if($name == 'Envelope'){
$this->status = 'envelope';
} elseif($name == 'Header'){
$this->root_header = $pos;
$this->status = 'header';
} elseif($name == 'Body'){
$this->status = 'body';
$this->body_position = $pos;
// set method
} elseif($this->status == 'body' && $pos == ($this->body_position+1)){
$this->status = 'method';
$this->root_struct_name = $name;
$this->root_struct = $pos;
$this->message[$pos]['type'] = 'struct';
$this->debug("found root struct $this->root_struct_name, pos $this->root_struct");
}
// set my status
$this->message[$pos]['status'] = $this->status;
// set name
$this->message[$pos]['name'] = htmlspecialchars($name);
// set attrs
$this->message[$pos]['attrs'] = $attrs;
// loop through atts, logging ns and type declarations
$attstr = '';
foreach($attrs as $key => $value){
$key_prefix = $this->getPrefix($key);
$key_localpart = $this->getLocalPart($key);
// if ns declarations, add to class level array of valid namespaces
if($key_prefix == 'xmlns'){
if(ereg('^http://www.w3.org/[0-9]{4}/XMLSchema$',$value)){
$this->XMLSchemaVersion = $value;
$this->namespaces['xsd'] = $this->XMLSchemaVersion;
$this->namespaces['xsi'] = $this->XMLSchemaVersion.'-instance';
}
$this->namespaces[$key_localpart] = $value;
// set method namespace
if($name == $this->root_struct_name){
$this->methodNamespace = $value;
}
// if it's a type declaration, set type
} elseif($key_localpart == 'type'){
$value_prefix = $this->getPrefix($value);
$value_localpart = $this->getLocalPart($value);
$this->message[$pos]['type'] = $value_localpart;
$this->message[$pos]['typePrefix'] = $value_prefix;
if(isset($this->namespaces[$value_prefix])){
$this->message[$pos]['type_namespace'] = $this->namespaces[$value_prefix];
} else if(isset($attrs['xmlns:'.$value_prefix])) {
$this->message[$pos]['type_namespace'] = $attrs['xmlns:'.$value_prefix];
}
// should do something here with the namespace of specified type?
} elseif($key_localpart == 'arrayType'){
$this->message[$pos]['type'] = 'array';
/* do arrayType ereg here
[1] arrayTypeValue ::= atype asize
[2] atype ::= QName rank*
[3] rank ::= '[' (',')* ']'
[4] asize ::= '[' length~ ']'
[5] length ::= nextDimension* Digit+
[6] nextDimension ::= Digit+ ','
*/
$expr = '([A-Za-z0-9_]+):([A-Za-z]+[A-Za-z0-9_]+)\[([0-9]+),?([0-9]*)\]';
if(ereg($expr,$value,$regs)){
$this->message[$pos]['typePrefix'] = $regs[1];
$this->message[$pos]['arrayTypePrefix'] = $regs[1];
if (isset($this->namespaces[$regs[1]])) {
$this->message[$pos]['arrayTypeNamespace'] = $this->namespaces[$regs[1]];
} else if (isset($attrs['xmlns:'.$regs[1]])) {
$this->message[$pos]['arrayTypeNamespace'] = $attrs['xmlns:'.$regs[1]];
}
$this->message[$pos]['arrayType'] = $regs[2];
$this->message[$pos]['arraySize'] = $regs[3];
$this->message[$pos]['arrayCols'] = $regs[4];
}
// specifies nil value (or not)
} elseif ($key_localpart == 'nil'){
$this->message[$pos]['nil'] = ($value == 'true' || $value == '1');
// some other attribute
} elseif ($key != 'href' && $key != 'xmlns' && $key_localpart != 'encodingStyle' && $key_localpart != 'root') {
$this->message[$pos]['xattrs']['!' . $key] = $value;
}
if ($key == 'xmlns') {
$this->default_namespace = $value;
}
// log id
if($key == 'id'){
$this->ids[$value] = $pos;
}
// root
if($key_localpart == 'root' && $value == 1){
$this->status = 'method';
$this->root_struct_name = $name;
$this->root_struct = $pos;
$this->debug("found root struct $this->root_struct_name, pos $pos");
}
// for doclit
$attstr .= " $key=\"$value\"";
}
// get namespace - must be done after namespace atts are processed
if(isset($prefix)){
$this->message[$pos]['namespace'] = $this->namespaces[$prefix];
$this->default_namespace = $this->namespaces[$prefix];
} else {
$this->message[$pos]['namespace'] = $this->default_namespace;
}
if($this->status == 'header'){
if ($this->root_header != $pos) {
$this->responseHeaders .= "<" . (isset($prefix) ? $prefix . ':' : '') . "$name$attstr>";
}
} elseif($this->root_struct_name != ''){
$this->document .= "<" . (isset($prefix) ? $prefix . ':' : '') . "$name$attstr>";
}
}
/**
* end-element handler
*
* @param resource $parser XML parser object
* @param string $name element name
* @access private
*/
function end_element($parser, $name) {
// position of current element is equal to the last value left in depth_array for my depth
$pos = $this->depth_array[$this->depth--];
// get element prefix
if(strpos($name,':')){
// get ns prefix
$prefix = substr($name,0,strpos($name,':'));
// get unqualified name
$name = substr(strstr($name,':'),1);
}
// build to native type
if(isset($this->body_position) && $pos > $this->body_position){
// deal w/ multirefs
if(isset($this->message[$pos]['attrs']['href'])){
// get id
$id = substr($this->message[$pos]['attrs']['href'],1);
// add placeholder to href array
$this->multirefs[$id][$pos] = 'placeholder';
// add set a reference to it as the result value
$this->message[$pos]['result'] =& $this->multirefs[$id][$pos];
// build complexType values
} elseif($this->message[$pos]['children'] != ''){
// if result has already been generated (struct/array)
if(!isset($this->message[$pos]['result'])){
$this->message[$pos]['result'] = $this->buildVal($pos);
}
// build complexType values of attributes and possibly simpleContent
} elseif (isset($this->message[$pos]['xattrs'])) {
if (isset($this->message[$pos]['nil']) && $this->message[$pos]['nil']) {
$this->message[$pos]['xattrs']['!'] = null;
} elseif (isset($this->message[$pos]['cdata']) && trim($this->message[$pos]['cdata']) != '') {
if (isset($this->message[$pos]['type'])) {
$this->message[$pos]['xattrs']['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
} else {
$parent = $this->message[$pos]['parent'];
if (isset($this->message[$parent]['type']) && ($this->message[$parent]['type'] == 'array') && isset($this->message[$parent]['arrayType'])) {
$this->message[$pos]['xattrs']['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
} else {
$this->message[$pos]['xattrs']['!'] = $this->message[$pos]['cdata'];
}
}
}
$this->message[$pos]['result'] = $this->message[$pos]['xattrs'];
// set value of simpleType (or nil complexType)
} else {
//$this->debug('adding data for scalar value '.$this->message[$pos]['name'].' of value '.$this->message[$pos]['cdata']);
if (isset($this->message[$pos]['nil']) && $this->message[$pos]['nil']) {
$this->message[$pos]['xattrs']['!'] = null;
} elseif (isset($this->message[$pos]['type'])) {
$this->message[$pos]['result'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
} else {
$parent = $this->message[$pos]['parent'];
if (isset($this->message[$parent]['type']) && ($this->message[$parent]['type'] == 'array') && isset($this->message[$parent]['arrayType'])) {
$this->message[$pos]['result'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
} else {
$this->message[$pos]['result'] = $this->message[$pos]['cdata'];
}
}
/* add value to parent's result, if parent is struct/array
$parent = $this->message[$pos]['parent'];
if($this->message[$parent]['type'] != 'map'){
if(strtolower($this->message[$parent]['type']) == 'array'){
$this->message[$parent]['result'][] = $this->message[$pos]['result'];
} else {
$this->message[$parent]['result'][$this->message[$pos]['name']] = $this->message[$pos]['result'];
}
}
*/
}
}
// for doclit
if($this->status == 'header'){
if ($this->root_header != $pos) {
$this->responseHeaders .= "</" . (isset($prefix) ? $prefix . ':' : '') . "$name>";
}
} elseif($pos >= $this->root_struct){
$this->document .= "</" . (isset($prefix) ? $prefix . ':' : '') . "$name>";
}
// switch status
if($pos == $this->root_struct){
$this->status = 'body';
$this->root_struct_namespace = $this->message[$pos]['namespace'];
} elseif($name == 'Body'){
$this->status = 'envelope';
} elseif($name == 'Header'){
$this->status = 'envelope';
} elseif($name == 'Envelope'){
//
}
// set parent back to my parent
$this->parent = $this->message[$pos]['parent'];
}
/**
* element content handler
*
* @param resource $parser XML parser object
* @param string $data element content
* @access private
*/
function character_data($parser, $data){
$pos = $this->depth_array[$this->depth];
if ($this->xml_encoding=='UTF-8'){
// TODO: add an option to disable this for folks who want
// raw UTF-8 that, e.g., might not map to iso-8859-1
// TODO: this can also be handled with xml_parser_set_option($this->parser, XML_OPTION_TARGET_ENCODING, "ISO-8859-1");
if($this->decode_utf8){
$data = utf8_decode($data);
}
}
$this->message[$pos]['cdata'] .= $data;
// for doclit
if($this->status == 'header'){
$this->responseHeaders .= $data;
} else {
$this->document .= $data;
}
}
/**
* get the parsed message
*
* @return mixed
* @access public
*/
function get_response(){
return $this->soapresponse;
}
/**
* get the parsed headers
*
* @return string XML or empty if no headers
* @access public
*/
function getHeaders(){
return $this->responseHeaders;
}
/**
* decodes simple types into PHP variables
*
* @param string $value value to decode
* @param string $type XML type to decode
* @param string $typens XML type namespace to decode
* @return mixed PHP value
* @access private
*/
function decodeSimple($value, $type, $typens) {
// TODO: use the namespace!
if ((!isset($type)) || $type == 'string' || $type == 'long' || $type == 'unsignedLong') {
return (string) $value;
}
if ($type == 'int' || $type == 'integer' || $type == 'short' || $type == 'byte') {
return (int) $value;
}
if ($type == 'float' || $type == 'double' || $type == 'decimal') {
return (double) $value;
}
if ($type == 'boolean') {
if (strtolower($value) == 'false' || strtolower($value) == 'f') {
return false;
}
return (boolean) $value;
}
if ($type == 'base64' || $type == 'base64Binary') {
$this->debug('Decode base64 value');
return base64_decode($value);
}
// obscure numeric types
if ($type == 'nonPositiveInteger' || $type == 'negativeInteger'
|| $type == 'nonNegativeInteger' || $type == 'positiveInteger'
|| $type == 'unsignedInt'
|| $type == 'unsignedShort' || $type == 'unsignedByte') {
return (int) $value;
}
// bogus: parser treats array with no elements as a simple type
if ($type == 'array') {
return array();
}
// everything else
return (string) $value;
}
/**
* builds response structures for compound values (arrays/structs)
* and scalars
*
* @param integer $pos position in node tree
* @return mixed PHP value
* @access private
*/
function buildVal($pos){
if(!isset($this->message[$pos]['type'])){
$this->message[$pos]['type'] = '';
}
$this->debug('in buildVal() for '.$this->message[$pos]['name']."(pos $pos) of type ".$this->message[$pos]['type']);
// if there are children...
if($this->message[$pos]['children'] != ''){
$this->debug('in buildVal, there are children');
$children = explode('|',$this->message[$pos]['children']);
array_shift($children); // knock off empty
// md array
if(isset($this->message[$pos]['arrayCols']) && $this->message[$pos]['arrayCols'] != ''){
$r=0; // rowcount
$c=0; // colcount
foreach($children as $child_pos){
$this->debug("in buildVal, got an MD array element: $r, $c");
$params[$r][] = $this->message[$child_pos]['result'];
$c++;
if($c == $this->message[$pos]['arrayCols']){
$c = 0;
$r++;
}
}
// array
} elseif($this->message[$pos]['type'] == 'array' || $this->message[$pos]['type'] == 'Array'){
$this->debug('in buildVal, adding array '.$this->message[$pos]['name']);
foreach($children as $child_pos){
$params[] = &$this->message[$child_pos]['result'];
}
// apache Map type: java hashtable
} elseif($this->message[$pos]['type'] == 'Map' && $this->message[$pos]['type_namespace'] == 'http://xml.apache.org/xml-soap'){
$this->debug('in buildVal, Java Map '.$this->message[$pos]['name']);
foreach($children as $child_pos){
$kv = explode("|",$this->message[$child_pos]['children']);
$params[$this->message[$kv[1]]['result']] = &$this->message[$kv[2]]['result'];
}
// generic compound type
//} elseif($this->message[$pos]['type'] == 'SOAPStruct' || $this->message[$pos]['type'] == 'struct') {
} else {
// Apache Vector type: treat as an array
$this->debug('in buildVal, adding Java Vector '.$this->message[$pos]['name']);
if ($this->message[$pos]['type'] == 'Vector' && $this->message[$pos]['type_namespace'] == 'http://xml.apache.org/xml-soap') {
$notstruct = 1;
} else {
$notstruct = 0;
}
//
foreach($children as $child_pos){
if($notstruct){
$params[] = &$this->message[$child_pos]['result'];
} else {
if (isset($params[$this->message[$child_pos]['name']])) {
// de-serialize repeated element name into an array
if ((!is_array($params[$this->message[$child_pos]['name']])) || (!isset($params[$this->message[$child_pos]['name']][0]))) {
$params[$this->message[$child_pos]['name']] = array($params[$this->message[$child_pos]['name']]);
}
$params[$this->message[$child_pos]['name']][] = &$this->message[$child_pos]['result'];
} else {
$params[$this->message[$child_pos]['name']] = &$this->message[$child_pos]['result'];
}
}
}
}
if (isset($this->message[$pos]['xattrs'])) {
$this->debug('in buildVal, handling attributes');
foreach ($this->message[$pos]['xattrs'] as $n => $v) {
$params[$n] = $v;
}
}
// handle simpleContent
if (isset($this->message[$pos]['cdata']) && trim($this->message[$pos]['cdata']) != '') {
$this->debug('in buildVal, handling simpleContent');
if (isset($this->message[$pos]['type'])) {
$params['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
} else {
$parent = $this->message[$pos]['parent'];
if (isset($this->message[$parent]['type']) && ($this->message[$parent]['type'] == 'array') && isset($this->message[$parent]['arrayType'])) {
$params['!'] = $this->decodeSimple($this->message[$pos]['cdata'], $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
} else {
$params['!'] = $this->message[$pos]['cdata'];
}
}
}
return is_array($params) ? $params : array();
} else {
$this->debug('in buildVal, no children, building scalar');
$cdata = isset($this->message[$pos]['cdata']) ? $this->message[$pos]['cdata'] : '';
if (isset($this->message[$pos]['type'])) {
return $this->decodeSimple($cdata, $this->message[$pos]['type'], isset($this->message[$pos]['type_namespace']) ? $this->message[$pos]['type_namespace'] : '');
}
$parent = $this->message[$pos]['parent'];
if (isset($this->message[$parent]['type']) && ($this->message[$parent]['type'] == 'array') && isset($this->message[$parent]['arrayType'])) {
return $this->decodeSimple($cdata, $this->message[$parent]['arrayType'], isset($this->message[$parent]['arrayTypeNamespace']) ? $this->message[$parent]['arrayTypeNamespace'] : '');
}
return $this->message[$pos]['cdata'];
}
}
}
?>