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<?php
/**
* Zend Framework
*
* LICENSE
*
* This source file is subject to the new BSD license that is bundled
* with this package in the file LICENSE.txt.
* It is also available through the world-wide-web at this URL:
* http://framework.zend.com/license/new-bsd
* If you did not receive a copy of the license and are unable to
* obtain it through the world-wide-web, please send an email
* to license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Amf
* @subpackage Parse_Amf3
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: Deserializer.php 18951 2009-11-12 16:26:19Z alexander $
*/
/** Zend_Amf_Parse_Deserializer */
require_once 'Zend/Amf/Parse/Deserializer.php';
/** Zend_Amf_Parse_TypeLoader */
require_once 'Zend/Amf/Parse/TypeLoader.php';
/**
* Read an AMF3 input stream and convert it into PHP data types.
*
* @todo readObject to handle Typed Objects
* @todo readXMLStrimg to be implemented.
* @todo Class could be implmented as Factory Class with each data type it's own class.
* @package Zend_Amf
* @subpackage Parse_Amf3
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Amf_Parse_Amf3_Deserializer extends Zend_Amf_Parse_Deserializer
{
/**
* Total number of objects in the referenceObject array
* @var int
*/
protected $_objectCount;
/**
* An array of reference objects per amf body
* @var array
*/
protected $_referenceObjects = array();
/**
* An array of reference strings per amf body
* @var array
*/
protected $_referenceStrings = array();
/**
* An array of reference class definitions per body
* @var array
*/
protected $_referenceDefinitions = array();
/**
* Read AMF markers and dispatch for deserialization
*
* Checks for AMF marker types and calls the appropriate methods
* for deserializing those marker types. markers are the data type of
* the following value.
*
* @param integer $typeMarker
* @return mixed Whatever the corresponding PHP data type is
* @throws Zend_Amf_Exception for unidentified marker type
*/
public function readTypeMarker($typeMarker = null)
{
if(null === $typeMarker) {
$typeMarker = $this->_stream->readByte();
}
switch($typeMarker) {
case Zend_Amf_Constants::AMF3_UNDEFINED:
return null;
case Zend_Amf_Constants::AMF3_NULL:
return null;
case Zend_Amf_Constants::AMF3_BOOLEAN_FALSE:
return false;
case Zend_Amf_Constants::AMF3_BOOLEAN_TRUE:
return true;
case Zend_Amf_Constants::AMF3_INTEGER:
return $this->readInteger();
case Zend_Amf_Constants::AMF3_NUMBER:
return $this->_stream->readDouble();
case Zend_Amf_Constants::AMF3_STRING:
return $this->readString();
case Zend_Amf_Constants::AMF3_DATE:
return $this->readDate();
case Zend_Amf_Constants::AMF3_ARRAY:
return $this->readArray();
case Zend_Amf_Constants::AMF3_OBJECT:
return $this->readObject();
case Zend_Amf_Constants::AMF3_XML:
case Zend_Amf_Constants::AMF3_XMLSTRING:
return $this->readXmlString();
case Zend_Amf_Constants::AMF3_BYTEARRAY:
return $this->readString();
default:
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unsupported type marker: ' . $typeMarker);
}
}
/**
* Read and deserialize an integer
*
* AMF 3 represents smaller integers with fewer bytes using the most
* significant bit of each byte. The worst case uses 32-bits
* to represent a 29-bit number, which is what we would have
* done with no compression.
* - 0x00000000 - 0x0000007F : 0xxxxxxx
* - 0x00000080 - 0x00003FFF : 1xxxxxxx 0xxxxxxx
* - 0x00004000 - 0x001FFFFF : 1xxxxxxx 1xxxxxxx 0xxxxxxx
* - 0x00200000 - 0x3FFFFFFF : 1xxxxxxx 1xxxxxxx 1xxxxxxx xxxxxxxx
* - 0x40000000 - 0xFFFFFFFF : throw range exception
*
* 0x04 -> integer type code, followed by up to 4 bytes of data.
*
* Parsing integers on OSFlash for the AMF3 integer data format:
* @link http://osflash.org/amf3/parsing_integers
* @return int|float
*/
public function readInteger()
{
$count = 1;
$intReference = $this->_stream->readByte();
$result = 0;
while ((($intReference & 0x80) != 0) && $count < 4) {
$result <<= 7;
$result |= ($intReference & 0x7f);
$intReference = $this->_stream->readByte();
$count++;
}
if ($count < 4) {
$result <<= 7;
$result |= $intReference;
} else {
// Use all 8 bits from the 4th byte
$result <<= 8;
$result |= $intReference;
// Check if the integer should be negative
if (($result & 0x10000000) != 0) {
//and extend the sign bit
$result |= ~0xFFFFFFF;
}
}
return $result;
}
/**
* Read and deserialize a string
*
* Strings can be sent as a reference to a previously
* occurring String by using an index to the implicit string reference table.
* Strings are encoding using UTF-8 - however the header may either
* describe a string literal or a string reference.
*
* - string = 0x06 string-data
* - string-data = integer-data [ modified-utf-8 ]
* - modified-utf-8 = *OCTET
*
* @return String
*/
public function readString()
{
$stringReference = $this->readInteger();
//Check if this is a reference string
if (($stringReference & 0x01) == 0) {
// reference string
$stringReference = $stringReference >> 1;
if ($stringReference >= count($this->_referenceStrings)) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Undefined string reference: ' . $stringReference);
}
// reference string found
return $this->_referenceStrings[$stringReference];
}
$length = $stringReference >> 1;
if ($length) {
$string = $this->_stream->readBytes($length);
$this->_referenceStrings[] = $string;
} else {
$string = "";
}
return $string;
}
/**
* Read and deserialize a date
*
* Data is the number of milliseconds elapsed since the epoch
* of midnight, 1st Jan 1970 in the UTC time zone.
* Local time zone information is not sent to flash.
*
* - date = 0x08 integer-data [ number-data ]
*
* @return Zend_Date
*/
public function readDate()
{
$dateReference = $this->readInteger();
if (($dateReference & 0x01) == 0) {
$dateReference = $dateReference >> 1;
if ($dateReference>=count($this->_referenceObjects)) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Undefined date reference: ' . $dateReference);
}
return $this->_referenceObjects[$dateReference];
}
$timestamp = floor($this->_stream->readDouble() / 1000);
require_once 'Zend/Date.php';
$dateTime = new Zend_Date((int) $timestamp);
$this->_referenceObjects[] = $dateTime;
return $dateTime;
}
/**
* Read amf array to PHP array
*
* - array = 0x09 integer-data ( [ 1OCTET *amf3-data ] | [OCTET *amf3-data 1] | [ OCTET *amf-data ] )
*
* @return array
*/
public function readArray()
{
$arrayReference = $this->readInteger();
if (($arrayReference & 0x01)==0){
$arrayReference = $arrayReference >> 1;
if ($arrayReference>=count($this->_referenceObjects)) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unknow array reference: ' . $arrayReference);
}
return $this->_referenceObjects[$arrayReference];
}
// Create a holder for the array in the reference list
$data = array();
$this->_referenceObjects[] =& $data;
$key = $this->readString();
// Iterating for string based keys.
while ($key != '') {
$data[$key] = $this->readTypeMarker();
$key = $this->readString();
}
$arrayReference = $arrayReference >>1;
//We have a dense array
for ($i=0; $i < $arrayReference; $i++) {
$data[] = $this->readTypeMarker();
}
return $data;
}
/**
* Read an object from the AMF stream and convert it into a PHP object
*
* @todo Rather than using an array of traitsInfo create Zend_Amf_Value_TraitsInfo
* @return object|array
*/
public function readObject()
{
$traitsInfo = $this->readInteger();
$storedObject = ($traitsInfo & 0x01)==0;
$traitsInfo = $traitsInfo >> 1;
// Check if the Object is in the stored Objects reference table
if ($storedObject) {
$ref = $traitsInfo;
if (!isset($this->_referenceObjects[$ref])) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unknown Object reference: ' . $ref);
}
$returnObject = $this->_referenceObjects[$ref];
} else {
// Check if the Object is in the stored Definistions reference table
$storedClass = ($traitsInfo & 0x01) == 0;
$traitsInfo = $traitsInfo >> 1;
if ($storedClass) {
$ref = $traitsInfo;
if (!isset($this->_referenceDefinitions[$ref])) {
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Unknows Definition reference: '. $ref);
}
// Populate the reference attributes
$className = $this->_referenceDefinitions[$ref]['className'];
$encoding = $this->_referenceDefinitions[$ref]['encoding'];
$propertyNames = $this->_referenceDefinitions[$ref]['propertyNames'];
} else {
// The class was not in the reference tables. Start reading rawdata to build traits.
// Create a traits table. Zend_Amf_Value_TraitsInfo would be ideal
$className = $this->readString();
$encoding = $traitsInfo & 0x03;
$propertyNames = array();
$traitsInfo = $traitsInfo >> 2;
}
// We now have the object traits defined in variables. Time to go to work:
if (!$className) {
// No class name generic object
$returnObject = new stdClass();
} else {
// Defined object
// Typed object lookup agsinst registered classname maps
if ($loader = Zend_Amf_Parse_TypeLoader::loadType($className)) {
$returnObject = new $loader();
} else {
//user defined typed object
require_once 'Zend/Amf/Exception.php';
throw new Zend_Amf_Exception('Typed object not found: '. $className . ' ');
}
}
// Add the Object ot the reference table
$this->_referenceObjects[] = $returnObject;
$properties = array(); // clear value
// Check encoding types for additional processing.
switch ($encoding) {
case (Zend_Amf_Constants::ET_EXTERNAL):
// Externalizable object such as {ArrayCollection} and {ObjectProxy}
if (!$storedClass) {
$this->_referenceDefinitions[] = array(
'className' => $className,
'encoding' => $encoding,
'propertyNames' => $propertyNames,
);
}
$returnObject->externalizedData = $this->readTypeMarker();
break;
case (Zend_Amf_Constants::ET_DYNAMIC):
// used for Name-value encoding
if (!$storedClass) {
$this->_referenceDefinitions[] = array(
'className' => $className,
'encoding' => $encoding,
'propertyNames' => $propertyNames,
);
}
// not a refrence object read name value properties from byte stream
do {
$property = $this->readString();
if ($property != "") {
$propertyNames[] = $property;
$properties[$property] = $this->readTypeMarker();
}
} while ($property !="");
break;
default:
// basic property list object.
if (!$storedClass) {
$count = $traitsInfo; // Number of properties in the list
for($i=0; $i< $count; $i++) {
$propertyNames[] = $this->readString();
}
// Add a refrence to the class.
$this->_referenceDefinitions[] = array(
'className' => $className,
'encoding' => $encoding,
'propertyNames' => $propertyNames,
);
}
foreach ($propertyNames as $property) {
$properties[$property] = $this->readTypeMarker();
}
break;
}
// Add properties back to the return object.
foreach($properties as $key=>$value) {
if($key) {
$returnObject->$key = $value;
}
}
}
if($returnObject instanceof Zend_Amf_Value_Messaging_ArrayCollection) {
if(isset($returnObject->externalizedData)) {
$returnObject = $returnObject->externalizedData;
} else {
$returnObject = get_object_vars($returnObject);
}
}
return $returnObject;
}
/**
* Convert XML to SimpleXml
* If user wants DomDocument they can use dom_import_simplexml
*
* @return SimpleXml Object
*/
public function readXmlString()
{
$xmlReference = $this->readInteger();
$length = $xmlReference >> 1;
$string = $this->_stream->readBytes($length);
return simplexml_load_string($string);
}
}
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