Server.php
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	<?php
	/**
	* Syncroton
	*
	* @package Syncroton
	* @license http://www.tine20.org/licenses/lgpl.html LGPL Version 3
	* @copyright Copyright (c) 2009-2012 Metaways Infosystems GmbH (http://www.metaways.de)
	* @author Lars Kneschke <l.kneschke@metaways.de>
	*/

	/**
	* class to handle incoming http ActiveSync requests
	*
	* @package Syncroton
	*/
	class Syncroton_Server
	{
	protected $_body;

	/**
	* informations about the currently device
	*
	* @var Syncroton_Backend_IDevice
	*/
	protected $_deviceBackend;

	/**
	* @var Zend_Log
	*/
	protected $_logger;

	/**
	* @var Zend_Controller_Request_Http
	*/
	protected $_request;

	protected $_userId;

	public function __construct($userId, Zend_Controller_Request_Http $request = null, $body = null)
	{
	if (Syncroton_Registry::isRegistered('loggerBackend')) {
	$this->_logger = Syncroton_Registry::get('loggerBackend');
	}

	$this->_userId = $userId;
	$this->_request = $request !== null ? $request : new Zend_Controller_Request_Http();
	$this->_body = $body !== null ? $body : fopen('php://input', 'r');

	$this->_deviceBackend = Syncroton_Registry::getDeviceBackend();

	}

	public function handle()
	{
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->debug(__METHOD__ . '::' . __LINE__ . ' REQUEST METHOD: ' . $this->_request->getMethod());

	switch($this->_request->getMethod()) {
	case 'OPTIONS':
	$this->_handleOptions();
	break;

	case 'POST':
	$this->_handlePost();
	break;

	case 'GET':
	echo "It works!<br>Your userid is: {$this->_userId} and your IP address is: {$_SERVER['REMOTE_ADDR']}.";
	break;
	}
	}

	/**
	* handle options request
	*
	*/
	protected function _handleOptions()
	{
	$command = new Syncroton_Command_Options();

	$command->getResponse();
	}

	protected function _handlePost()
	{
	if(count($_GET) == 1) {
	$arrayKeys = array_keys($_GET);
	$requestParameters = $this->_decodeRequestParameters($arrayKeys[0]);
	} else {
	$requestParameters = $this->_getRequestParameters();
	}

	if ($this->_logger instanceof Zend_Log)
	$this->_logger->debug(__METHOD__ . '::' . __LINE__ . ' REQUEST ' . print_r($requestParameters, true));

	$userAgent = $this->_request->getServer('HTTP_USER_AGENT', $requestParameters['deviceType']);
	$policyKey = $this->_request->getServer('HTTP_X_MS_POLICYKEY');

	if ($this->_logger instanceof Zend_Log)
	$this->_logger->debug(__METHOD__ . '::' . __LINE__ . " Agent: $userAgent PolicyKey: $policyKey ASVersion: {$requestParameters['protocolVersion']} Command: {$requestParameters['command']}");

	$className = 'Syncroton_Command_' . $requestParameters['command'];

	if(!class_exists($className)) {
	throw new Syncroton_Exception_CommandNotFound('unsupported command ' . $requestParameters['command']);
	}

	// get user device
	$device = $this->_getUserDevice(
	$this->_userId,
	$requestParameters['deviceId'],
	$requestParameters['deviceType'],
	$userAgent,
	$requestParameters['protocolVersion']
	);

	if ($this->_request->getServer('CONTENT_TYPE') == 'application/vnd.ms-sync.wbxml') {
	// decode wbxml request
	try {
	$decoder = new Syncroton_Wbxml_Decoder($this->_body);
	$requestBody = $decoder->decode();
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->debug(__METHOD__ . '::' . __LINE__ . " xml request: " . $requestBody->saveXML());
	} catch(Syncroton_Wbxml_Exception_UnexpectedEndOfFile $e) {
	$requestBody = NULL;
	}
	} else {
	$requestBody = $this->_body;
	}

	try {
	$command = new $className($requestBody, $device, $policyKey);

	$command->handle();

	if (PHP_SAPI !== 'cli') {
	header("MS-Server-ActiveSync: 8.3");
	}

	$response = $command->getResponse();

	} catch (Syncroton_Exception_PolicyKeyMissing $sepkm) {
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->warn(__METHOD__ . '::' . __LINE__ . " X-MS-POLICYKEY missing (" . $_command. ')');
	header("HTTP/1.1 400 header X-MS-POLICYKEY not found");
	return;

	} catch (Syncroton_Exception_ProvisioningNeeded $sepn) {
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->info(__METHOD__ . '::' . __LINE__ . " provisioning needed");
	header("HTTP/1.1 449 Retry after sending a PROVISION command");
	return;

	} catch (Exception $e) {
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->crit(__METHOD__ . '::' . __LINE__ . " unexpected exception occured: " . get_class($e));
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->crit(__METHOD__ . '::' . __LINE__ . " exception message: " . $e->getMessage());
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->info(__METHOD__ . '::' . __LINE__ . " " . $e->getTraceAsString());

	header("HTTP/1.1 500 Internal server error");
	return;
	}

	if ($response instanceof DOMDocument) {
	if ($this->_logger instanceof Zend_Log)
	$this->_logger->debug(__METHOD__ . '::' . __LINE__ . " xml response: " . $response->saveXML());

	$outputStream = fopen("php://temp", 'r+');

	$encoder = new Syncroton_Wbxml_Encoder($outputStream, 'UTF-8', 3);
	$encoder->encode($response);

	header("Content-Type: application/vnd.ms-sync.wbxml");

	rewind($outputStream);
	fpassthru($outputStream);
	}
	}

	/**
	* return request params
	*
	* @return array
	*/
	protected function _getRequestParameters()
	{
	$result = array(
	'protocolVersion' => $this->_request->getServer('HTTP_MS_ASPROTOCOLVERSION'),
	'command' => $this->_request->getParam('Cmd'),
	'deviceId' => $this->_request->getParam('DeviceId'),
	'deviceType' => $this->_request->getParam('DeviceType')
	);

	return $result;
	}

	/**
	* get existing device of owner or create new device for owner
	*
	* @param unknown_type $ownerId
	* @param unknown_type $deviceId
	* @param unknown_type $deviceType
	* @param unknown_type $userAgent
	* @param unknown_type $protocolVersion
	* @return Syncroton_Model_Device
	*/
	protected function _getUserDevice($ownerId, $deviceId, $deviceType, $userAgent, $protocolVersion)
	{
	try {
	$device = $this->_deviceBackend->getUserDevice($ownerId, $deviceId);

	$device->useragent = $userAgent;
	$device->acsversion = $protocolVersion;
	$device = $this->_deviceBackend->update($device);

	} catch (Syncroton_Exception_NotFound $senf) {
	$device = $this->_deviceBackend->create(new Syncroton_Model_Device(array(
	'owner_id' => $ownerId,
	'deviceid' => $deviceId,
	'devicetype' => $deviceType,
	'useragent' => $userAgent,
	'acsversion' => $protocolVersion
	)));
	}

	return $device;
	}
	}

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