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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_Rest
* @subpackage Server
* @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: Server.php 18545 2009-10-15 11:06:03Z yoshida@zend.co.jp $
*/
/**
* @see Zend_Server_Interface
*/
require_once 'Zend/Server/Interface.php';
/**
* @see Zend_Server_Reflection
*/
require_once 'Zend/Server/Reflection.php';
/**
* @see Zend_Server_Abstract
*/
require_once 'Zend/Server/Abstract.php';
/**
* @category Zend
* @package Zend_Rest
* @subpackage Server
* @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_Rest_Server implements Zend_Server_Interface
{
/**
* Class Constructor Args
* @var array
*/
protected $_args = array();
/**
* @var string Encoding
*/
protected $_encoding = 'UTF-8';
/**
* @var array An array of Zend_Server_Reflect_Method
*/
protected $_functions = array();
/**
* @var array Array of headers to send
*/
protected $_headers = array();
/**
* @var array PHP's Magic Methods, these are ignored
*/
protected static $magicMethods = array(
'__construct',
'__destruct',
'__get',
'__set',
'__call',
'__sleep',
'__wakeup',
'__isset',
'__unset',
'__tostring',
'__clone',
'__set_state',
);
/**
* @var string Current Method
*/
protected $_method;
/**
* @var Zend_Server_Reflection
*/
protected $_reflection = null;
/**
* Whether or not {@link handle()} should send output or return the response.
* @var boolean Defaults to false
*/
protected $_returnResponse = false;
/**
* Constructor
*/
public function __construct()
{
set_exception_handler(array($this, "fault"));
$this->_reflection = new Zend_Server_Reflection();
}
/**
* Set XML encoding
*
* @param string $encoding
* @return Zend_Rest_Server
*/
public function setEncoding($encoding)
{
$this->_encoding = (string) $encoding;
return $this;
}
/**
* Get XML encoding
*
* @return string
*/
public function getEncoding()
{
return $this->_encoding;
}
/**
* Lowercase a string
*
* Lowercase's a string by reference
*
* @param string $value
* @param string $key
* @return string Lower cased string
*/
public static function lowerCase(&$value, &$key)
{
return $value = strtolower($value);
}
/**
* Whether or not to return a response
*
* If called without arguments, returns the value of the flag. If called
* with an argument, sets the flag.
*
* When 'return response' is true, {@link handle()} will not send output,
* but will instead return the response from the dispatched function/method.
*
* @param boolean $flag
* @return boolean|Zend_Rest_Server Returns Zend_Rest_Server when used to set the flag; returns boolean flag value otherwise.
*/
public function returnResponse($flag = null)
{
if (null === $flag) {
return $this->_returnResponse;
}
$this->_returnResponse = ($flag) ? true : false;
return $this;
}
/**
* Implement Zend_Server_Interface::handle()
*
* @param array $request
* @throws Zend_Rest_Server_Exception
* @return string|void
*/
public function handle($request = false)
{
$this->_headers = array('Content-Type: text/xml');
if (!$request) {
$request = $_REQUEST;
}
if (isset($request['method'])) {
$this->_method = $request['method'];
if (isset($this->_functions[$this->_method])) {
if ($this->_functions[$this->_method] instanceof Zend_Server_Reflection_Function || $this->_functions[$this->_method] instanceof Zend_Server_Reflection_Method && $this->_functions[$this->_method]->isPublic()) {
$request_keys = array_keys($request);
array_walk($request_keys, array(__CLASS__, "lowerCase"));
$request = array_combine($request_keys, $request);
$func_args = $this->_functions[$this->_method]->getParameters();
$calling_args = array();
foreach ($func_args as $arg) {
if (isset($request[strtolower($arg->getName())])) {
$calling_args[] = $request[strtolower($arg->getName())];
} elseif ($arg->isOptional()) {
$calling_args[] = $arg->getDefaultValue();
}
}
foreach ($request as $key => $value) {
if (substr($key, 0, 3) == 'arg') {
$key = str_replace('arg', '', $key);
$calling_args[$key] = $value;
}
}
// Sort arguments by key -- @see ZF-2279
ksort($calling_args);
$result = false;
if (count($calling_args) < count($func_args)) {
require_once 'Zend/Rest/Server/Exception.php';
$result = $this->fault(new Zend_Rest_Server_Exception('Invalid Method Call to ' . $this->_method . '. Requires ' . count($func_args) . ', ' . count($calling_args) . ' given.'), 400);
}
if (!$result && $this->_functions[$this->_method] instanceof Zend_Server_Reflection_Method) {
// Get class
$class = $this->_functions[$this->_method]->getDeclaringClass()->getName();
if ($this->_functions[$this->_method]->isStatic()) {
// for some reason, invokeArgs() does not work the same as
// invoke(), and expects the first argument to be an object.
// So, using a callback if the method is static.
$result = $this->_callStaticMethod($class, $calling_args);
} else {
// Object method
$result = $this->_callObjectMethod($class, $calling_args);
}
} elseif (!$result) {
try {
$result = call_user_func_array($this->_functions[$this->_method]->getName(), $calling_args); //$this->_functions[$this->_method]->invokeArgs($calling_args);
} catch (Exception $e) {
$result = $this->fault($e);
}
}
} else {
require_once "Zend/Rest/Server/Exception.php";
$result = $this->fault(
new Zend_Rest_Server_Exception("Unknown Method '$this->_method'."),
404
);
}
} else {
require_once "Zend/Rest/Server/Exception.php";
$result = $this->fault(
new Zend_Rest_Server_Exception("Unknown Method '$this->_method'."),
404
);
}
} else {
require_once "Zend/Rest/Server/Exception.php";
$result = $this->fault(
new Zend_Rest_Server_Exception("No Method Specified."),
404
);
}
if ($result instanceof SimpleXMLElement) {
$response = $result->asXML();
} elseif ($result instanceof DOMDocument) {
$response = $result->saveXML();
} elseif ($result instanceof DOMNode) {
$response = $result->ownerDocument->saveXML($result);
} elseif (is_array($result) || is_object($result)) {
$response = $this->_handleStruct($result);
} else {
$response = $this->_handleScalar($result);
}
if (!$this->returnResponse()) {
if (!headers_sent()) {
foreach ($this->_headers as $header) {
header($header);
}
}
echo $response;
return;
}
return $response;
}
/**
* Implement Zend_Server_Interface::setClass()
*
* @param string $classname Class name
* @param string $namespace Class namespace (unused)
* @param array $argv An array of Constructor Arguments
*/
public function setClass($classname, $namespace = '', $argv = array())
{
$this->_args = $argv;
foreach ($this->_reflection->reflectClass($classname, $argv)->getMethods() as $method) {
$this->_functions[$method->getName()] = $method;
}
}
/**
* Handle an array or object result
*
* @param array|object $struct Result Value
* @return string XML Response
*/
protected function _handleStruct($struct)
{
$function = $this->_functions[$this->_method];
if ($function instanceof Zend_Server_Reflection_Method) {
$class = $function->getDeclaringClass()->getName();
} else {
$class = false;
}
$method = $function->getName();
$dom = new DOMDocument('1.0', $this->getEncoding());
if ($class) {
$root = $dom->createElement($class);
$method = $dom->createElement($method);
$root->appendChild($method);
} else {
$root = $dom->createElement($method);
$method = $root;
}
$root->setAttribute('generator', 'zend');
$root->setAttribute('version', '1.0');
$dom->appendChild($root);
$this->_structValue($struct, $dom, $method);
$struct = (array) $struct;
if (!isset($struct['status'])) {
$status = $dom->createElement('status', 'success');
$method->appendChild($status);
}
return $dom->saveXML();
}
/**
* Recursively iterate through a struct
*
* Recursively iterates through an associative array or object's properties
* to build XML response.
*
* @param mixed $struct
* @param DOMDocument $dom
* @param DOMElement $parent
* @return void
*/
protected function _structValue($struct, DOMDocument $dom, DOMElement $parent)
{
$struct = (array) $struct;
foreach ($struct as $key => $value) {
if ($value === false) {
$value = 0;
} elseif ($value === true) {
$value = 1;
}
if (ctype_digit((string) $key)) {
$key = 'key_' . $key;
}
if (is_array($value) || is_object($value)) {
$element = $dom->createElement($key);
$this->_structValue($value, $dom, $element);
} else {
$element = $dom->createElement($key);
$element->appendChild($dom->createTextNode($value));
}
$parent->appendChild($element);
}
}
/**
* Handle a single value
*
* @param string|int|boolean $value Result value
* @return string XML Response
*/
protected function _handleScalar($value)
{
$function = $this->_functions[$this->_method];
if ($function instanceof Zend_Server_Reflection_Method) {
$class = $function->getDeclaringClass()->getName();
} else {
$class = false;
}
$method = $function->getName();
$dom = new DOMDocument('1.0', $this->getEncoding());
if ($class) {
$xml = $dom->createElement($class);
$methodNode = $dom->createElement($method);
$xml->appendChild($methodNode);
} else {
$xml = $dom->createElement($method);
$methodNode = $xml;
}
$xml->setAttribute('generator', 'zend');
$xml->setAttribute('version', '1.0');
$dom->appendChild($xml);
if ($value === false) {
$value = 0;
} elseif ($value === true) {
$value = 1;
}
if (isset($value)) {
$element = $dom->createElement('response');
$element->appendChild($dom->createTextNode($value));
$methodNode->appendChild($element);
} else {
$methodNode->appendChild($dom->createElement('response'));
}
$methodNode->appendChild($dom->createElement('status', 'success'));
return $dom->saveXML();
}
/**
* Implement Zend_Server_Interface::fault()
*
* Creates XML error response, returning DOMDocument with response.
*
* @param string|Exception $fault Message
* @param int $code Error Code
* @return DOMDocument
*/
public function fault($exception = null, $code = null)
{
if (isset($this->_functions[$this->_method])) {
$function = $this->_functions[$this->_method];
} elseif (isset($this->_method)) {
$function = $this->_method;
} else {
$function = 'rest';
}
if ($function instanceof Zend_Server_Reflection_Method) {
$class = $function->getDeclaringClass()->getName();
} else {
$class = false;
}
if ($function instanceof Zend_Server_Reflection_Function_Abstract) {
$method = $function->getName();
} else {
$method = $function;
}
$dom = new DOMDocument('1.0', $this->getEncoding());
if ($class) {
$xml = $dom->createElement($class);
$xmlMethod = $dom->createElement($method);
$xml->appendChild($xmlMethod);
} else {
$xml = $dom->createElement($method);
$xmlMethod = $xml;
}
$xml->setAttribute('generator', 'zend');
$xml->setAttribute('version', '1.0');
$dom->appendChild($xml);
$xmlResponse = $dom->createElement('response');
$xmlMethod->appendChild($xmlResponse);
if ($exception instanceof Exception) {
$element = $dom->createElement('message');
$element->appendChild($dom->createTextNode($exception->getMessage()));
$xmlResponse->appendChild($element);
$code = $exception->getCode();
} elseif (($exception !== null) || 'rest' == $function) {
$xmlResponse->appendChild($dom->createElement('message', 'An unknown error occured. Please try again.'));
} else {
$xmlResponse->appendChild($dom->createElement('message', 'Call to ' . $method . ' failed.'));
}
$xmlMethod->appendChild($xmlResponse);
$xmlMethod->appendChild($dom->createElement('status', 'failed'));
// Headers to send
if ($code === null || (404 != $code)) {
$this->_headers[] = 'HTTP/1.0 400 Bad Request';
} else {
$this->_headers[] = 'HTTP/1.0 404 File Not Found';
}
return $dom;
}
/**
* Retrieve any HTTP extra headers set by the server
*
* @return array
*/
public function getHeaders()
{
return $this->_headers;
}
/**
* Implement Zend_Server_Interface::addFunction()
*
* @param string $function Function Name
* @param string $namespace Function namespace (unused)
*/
public function addFunction($function, $namespace = '')
{
if (!is_array($function)) {
$function = (array) $function;
}
foreach ($function as $func) {
if (is_callable($func) && !in_array($func, self::$magicMethods)) {
$this->_functions[$func] = $this->_reflection->reflectFunction($func);
} else {
require_once 'Zend/Rest/Server/Exception.php';
throw new Zend_Rest_Server_Exception("Invalid Method Added to Service.");
}
}
}
/**
* Implement Zend_Server_Interface::getFunctions()
*
* @return array An array of Zend_Server_Reflection_Method's
*/
public function getFunctions()
{
return $this->_functions;
}
/**
* Implement Zend_Server_Interface::loadFunctions()
*
* @todo Implement
* @param array $functions
*/
public function loadFunctions($functions)
{
}
/**
* Implement Zend_Server_Interface::setPersistence()
*
* @todo Implement
* @param int $mode
*/
public function setPersistence($mode)
{
}
/**
* Call a static class method and return the result
*
* @param string $class
* @param array $args
* @return mixed
*/
protected function _callStaticMethod($class, array $args)
{
try {
$result = call_user_func_array(array($class, $this->_functions[$this->_method]->getName()), $args);
} catch (Exception $e) {
$result = $this->fault($e);
}
return $result;
}
/**
* Call an instance method of an object
*
* @param string $class
* @param array $args
* @return mixed
* @throws Zend_Rest_Server_Exception For invalid class name
*/
protected function _callObjectMethod($class, array $args)
{
try {
if ($this->_functions[$this->_method]->getDeclaringClass()->getConstructor()) {
$object = $this->_functions[$this->_method]->getDeclaringClass()->newInstanceArgs($this->_args);
} else {
$object = $this->_functions[$this->_method]->getDeclaringClass()->newInstance();
}
} catch (Exception $e) {
require_once 'Zend/Rest/Server/Exception.php';
throw new Zend_Rest_Server_Exception('Error instantiating class ' . $class .
' to invoke method ' . $this->_functions[$this->_method]->getName() .
' (' . $e->getMessage() . ') ',
500);
}
try {
$result = $this->_functions[$this->_method]->invokeArgs($object, $args);
} catch (Exception $e) {
$result = $this->fault($e);
}
return $result;
}
}
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