| alpha--controller--front

# Source for file FrontController.inc Documentation is available at FrontController.inc <?php require_once $config->get('sysRoot').'alpha/util/AlphaErrorHandlers.inc'; require_once $config->get('sysRoot').'alpha/exceptions/AlphaException.inc'; require_once $config->get('sysRoot').'alpha/exceptions/SecurityException.inc'; require_once $config->get('sysRoot').'alpha/exceptions/ResourceNotFoundException.inc'; require_once $config->get('sysRoot').'alpha/exceptions/IllegalArguementException.inc'; require_once $config->get('sysRoot').'alpha/exceptions/LibraryNotInstalledException.inc'; require_once $config->get('sysRoot').'alpha/util/filters/AlphaFilterInterface.inc'; require_once $config->get('sysRoot').'alpha/model/BadRequestObject.inc'; require_once $config->get('sysRoot').'alpha/controller/AlphaController.inc'; /** * * The front controller designed to optionally handle all requests * * @package alpha::controller::front * @since 1.0 * @author John Collins <john@design-ireland.net> * @version $Id: FrontController.inc 1341 2011-03-17 15:02:02Z johnc $ * @license http://www.opensource.org/licenses/bsd-license.php The BSD License * @copyright Copyright (c) 2011, John Collins (founder of Alpha Framework). * All rights reserved. * * <pre> * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the * following conditions are met: * * * Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the * following disclaimer in the documentation and/or other * materials provided with the distribution. * * Neither the name of the Alpha Framework nor the names * of its contributors may be used to endorse or promote * products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * </pre> * */ class FrontController { /** * The GET query string * * @var string * @since 1.0 */ private $queryString; /** * The name of the page controller we want to invoke * * @var string * @since 1.0 */ private $pageController; /** * Boolean to flag if the GET query string is encrypted or not * * @var boolean * @since 1.0 */ private $encryptedQuery = false; /** * An array of controller alias * * @var array * @since 1.0 */ private $controllerAlias = array(); /** * An array of HTTP filters applied to each request to the front controller. Each * member must implement AlphaFilterInterface! * * @var array * @since 1.0 */ private $filters = array(); /** * The name of the current alias * * @var string * @since 1.0 */ private $currentAlias; /** * Trace logger * * @var Logger * @since 1.0 */ private static $logger = null; /** * The constructor method * * @throws ResourceNotFoundException * @since 1.0 */ public function __construct() { self::$logger = new Logger('FrontController'); self::$logger->debug('>>__construct()'); global $config; self::$logger->debug('Requested URL is ['.$_SERVER['REQUEST_URI'].']'); // direct calls to the front controller if (isset($_GET['act'])) { self::$logger->debug('Processing direct request to the front controller'); $this->pageController = $_GET['act']; // calls to the front controller via mod_rewrite }elseif($config->get('sysUseModRewrite') && !isset($_GET['tk'])) { self::$logger->debug('Processing a mod_rewrite request'); $this->handleModRewriteRequests(); // direct calls to the front controller with an encrypted query string }else{ if (!isset($_GET['tk'])) { self::$logger->warn('No controller action set for the front controller, URL is ['.$_SERVER['REQUEST_URI'].']'); throw new ResourceNotFoundException('The file that you have requested cannot be found!'); }else{ self::$logger->debug('Processing a direct request to the front controller with an encrypted token param'); $this->setEncrypt(true); try { $this->decodeQuery(); $this->populateGetVars(); if(isset($_GET['act'])) $this->pageController = $_GET['act']; else throw new SecurityException('No act param provided in the secure token!'); }catch (SecurityException $e) { self::$logger->error('Error while attempting to decode a secure token in the FrontController: '.$e->getMessage()); throw new ResourceNotFoundException('The file that you have requested cannot be found!'); } } } self::$logger->debug('<<__construct'); } /** * Sets the encryption flag * * @param boolean $encryptedQuery * @since 1.0 */ public function setEncrypt($encryptedQuery) { $this->encryptedQuery = $encryptedQuery; } /** * Method to populate the global _GET and _REQUEST arrays with the decoded * query string * * @since 1.0 */ private function populateGetVars() { $pairs = explode('&', $this->queryString); foreach($pairs as $pair) { $keyValue = explode('=', $pair); if(count($keyValue) == 2) { $_GET[$keyValue[0]] = $keyValue[1]; $_REQUEST[$keyValue[0]] = $keyValue[1]; } } } /** * Static method for generating an absolute, secure URL for a page controller * * @param string $params * @return string * @since 1.0 */ public static function generateSecureURL($params) { global $config; if($config->get('sysUseModRewrite')) return $config->get('sysURL').'tk/'.FrontController::encodeQuery($params); else return $config->get('sysURL').'?tk='.FrontController::encodeQuery($params); } /** * Static method for encoding a query string * * @param string $queryString * @return string * @since 1.0 */ public static function encodeQuery($queryString) { global $config; $td = mcrypt_module_open ('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv (mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); mcrypt_generic_init ($td, $config->get('sysQSKey'), $iv); $encryptedData = mcrypt_generic ($td, $queryString); mcrypt_generic_deinit ($td); mcrypt_module_close ($td); $return = base64_encode($encryptedData); // remove any characters that are likely to cause trouble on a URL $return = strtr($return, '+/', '-_'); return $return; } /** * Method to decode the current query string * * @throws SecurityException * @since 1.0 */ private function decodeQuery() { global $config; if (!isset($_GET['tk'])) { throw new SecurityException('No token provided for the front controller!'); }else{ $td = mcrypt_module_open('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); // replace any troublesome characters from the URL with the original values $token = strtr($_GET['tk'], '-_', '+/'); $token = base64_decode($token); $this->queryString = trim(mcrypt_decrypt('tripledes', $config->get('sysQSKey'), $token, 'ecb', $iv)); } } /** * Static method to return the decoded GET paramters from an encrytpted tk value * * @return string * @since 1.0 */ public static function decodeQueryParams($tk) { global $config; $td = mcrypt_module_open('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); // replace any troublesome characters from the URL with the original values $token = strtr($tk, '-_', '+/'); $token = base64_decode($token); $params = trim(mcrypt_decrypt('tripledes', $config->get('sysQSKey'), $token, 'ecb', $iv)); return $params; } /** * Static method to return the decoded GET paramters from an encrytpted tk value as an array of key/value pairs. * * @return array * @since 1.0 */ public static function getDecodeQueryParams($tk) { global $config; $td = mcrypt_module_open('tripledes', '', 'ecb', ''); $iv = mcrypt_create_iv(mcrypt_enc_get_iv_size ($td), MCRYPT_RAND); // replace any troublesome characters from the URL with the original values $token = strtr($tk, '-_', '+/'); $token = base64_decode($token); $params = trim(mcrypt_decrypt('tripledes', $config->get('sysQSKey'), $token, 'ecb', $iv)); $pairs = explode('&', $params); $parameters = array(); foreach($pairs as $pair) { $split = explode('=', $pair); $parameters[$split[0]] = $split[1]; } return $parameters; } /** * Method to load the page controller * * @param boolean $allowRedirects Defaults to true, set to false if you want to prevent the front controller from redirecting the request * @throws ResourceNotFoundException * @since 1.0 */ public function loadController($allowRedirects = true) { global $config; if($allowRedirects && $config->get('sysCheckInstalled') && $this->pageController != 'Install' && $this->pageController != 'Login') { if(!AlphaDAO::isInstalled()) { self::$logger->info('Invoking the Install controller as the system DB is not installed...'); $url = FrontController::generateSecureURL('act=Install'); self::$logger->info('Redirecting to ['.$url.']'); header('Location: '.$url); exit; } } // first process any attached filters foreach ($this->filters as $filter) $filter->process(); if($allowRedirects) { // if there is an alias configured for the above page controller, redirect there if($config->get('sysForceFC') && $this->hasAlias($this->pageController)) { // make sure that it is not already an alias-based request to prevent re-direct loop if(empty($this->currentAlias)) { // set the correct HTTP header for the response header('HTTP/1.1 301 Moved Permanently'); // see if there are any other GET params appart from the controller name if (count($_GET) > 1) { $keys = array_keys($_GET); $param = $_GET[$keys[1]]; // if its a title then replace spaces with underscores in the URL if($keys[1] == 'title') $param = str_replace(' ','_',$param); $URL = $config->get('sysURL').'/'.$this->getControllerAlias($this->pageController).'/'. $this->getControllerParam($this->pageController).$param; }else{ $URL = $config->get('sysURL').'/'.$this->getControllerAlias($this->pageController); } header('Location: '.$URL); exit; } } } try { AlphaController::loadControllerDef($this->pageController); $pageController = new $this->pageController(); if(!empty($_POST)) { $pageController->doPOST($_REQUEST); }else{ $pageController->doGET($_GET); } }catch (LibraryNotInstalledException $e) { self::$logger->warn($e->getMessage()."\nStacktrace:\n".$e->getTraceAsString()."\nRequest params:\n".var_export($_REQUEST, true)."\nRequested resource:\n".$_SERVER['REQUEST_URI']); throw new LibraryNotInstalledException($e->getMessage()); }catch (ResourceNotAllowedException $e) { self::$logger->warn($e->getMessage()."\nStacktrace:\n".$e->getTraceAsString()."\nRequest params:\n".var_export($_REQUEST, true)."\nRequested resource:\n".$_SERVER['REQUEST_URI']); throw new ResourceNotAllowedException($e->getMessage()); }catch (ResourceNotFoundException $e) { self::$logger->warn($e->getMessage()."\nStacktrace:\n".$e->getTraceAsString()."\nRequest params:\n".var_export($_REQUEST, true)."\nRequested resource:\n".$_SERVER['REQUEST_URI']); throw new ResourceNotFoundException($e->getMessage()); }catch (IllegalArguementException $e) { self::$logger->warn($e->getMessage()."\nStacktrace:\n".$e->getTraceAsString()."\nRequest params:\n".var_export($_REQUEST, true)."\nRequested resource:\n".$_SERVER['REQUEST_URI']); if($config->get('sysEnableClientTempBlacklistFiler')) { if(isset($_SERVER['HTTP_USER_AGENT']) && isset($_SERVER['REMOTE_ADDR']) && isset($_SERVER['REQUEST_URI'])) { $request = new BadRequestObject(); $request->set('client', $_SERVER['HTTP_USER_AGENT']); $request->set('IP', $_SERVER['REMOTE_ADDR']); $request->set('requestedResource', $_SERVER['REQUEST_URI']); $request->save(); } } throw new ResourceNotFoundException('The file that you have requested cannot be found!'); }catch (AlphaException $e) { self::$logger->warn($e->getMessage()."\nStacktrace:\n".$e->getTraceAsString()."\nRequest params:\n".var_export($_REQUEST, true)."\nRequested resource:\n".$_SERVER['REQUEST_URI']); if($config->get('sysEnableClientTempBlacklistFiler')) { if(isset($_SERVER['HTTP_USER_AGENT']) && isset($_SERVER['REMOTE_ADDR']) && isset($_SERVER['REQUEST_URI'])) { $request = new BadRequestObject(); $request->set('client', $_SERVER['HTTP_USER_AGENT']); $request->set('IP', $_SERVER['REMOTE_ADDR']); $request->set('requestedResource', $_SERVER['REQUEST_URI']); $request->save(); } } throw new ResourceNotFoundException('The file that you have requested cannot be found!'); } } /** * Used to register a controller alias to enable shorter URLs with mod_rewrite support enabled. Note that * only controllers with a single parameter are supported. * * @param string $controller The name of the page controller class * @param string $alias The URL alias for the page controller * @param string $param The name of the GET parameter on the alias URL request * @since 1.0 */ public function registerAlias($controller, $alias, $param=null) { $this->controllerAlias[$alias] = $controller; if(isset($param)) $this->controllerAlias[$alias.'_param'] = $param; // set up the page controller $this->handleModRewriteRequests(); } /** * Check to see if an alias exists for the given alias name * * @param string $alias * @return boolean * @since 1.0 */ public function checkAlias($alias) { if(array_key_exists($alias, $this->controllerAlias)) return true; else return false; } /** * Check to see if an alias exists for the given controller name * * @param string $controller * @return boolean * @since 1.0 */ public function hasAlias($controller) { if(in_array($controller, $this->controllerAlias)) return true; else return false; } /** * Gets the full name of the controller for the given alias * * @param string $alias * @return string * @since 1.0 */ public function getAliasController($alias) { if(array_key_exists($alias, $this->controllerAlias)) return $this->controllerAlias[$alias]; } /** * Gets the name of the alias for the given controller * * @param string $controller * @return string * @since 1.0 */ public function getControllerAlias($controller) { if(in_array($controller, $this->controllerAlias)) { $keys = array_keys($this->controllerAlias, $controller); // there should only ever be one key per controller return $keys[0]; } } /** * Gets the parameter name expected in requests to the controller with the given alias * * @param string $alias * @return string * @since 1.0 */ public function getAliasParam($alias) { if(array_key_exists($alias.'_param', $this->controllerAlias)) return $this->controllerAlias[$alias.'_param']; else return ''; } /** * Gets the parameter name expected in requests to the controller with the given controller name * * @param string $controller * @return string * @since 1.0 */ public function getControllerParam($controller) { $alias = $this->getControllerAlias($controller); if(array_key_exists($alias.'_param', $this->controllerAlias)) return $this->controllerAlias[$alias.'_param']; else return ''; } /** * Handles all of the rules for mod_rewrite style URL parsing * * @since 1.0 */ private function handleModRewriteRequests() { self::$logger->debug('>>handleModRewriteRequests'); global $config; // strip off the system URL from the request URL $request = str_replace($config->get('sysURL'), '', 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']); self::$logger->debug('$request is ['.$request.']'); $params = explode('/', $request); self::$logger->debug('$params are ['.var_export($params, true).']'); try { // first param will always be the controller alias if(empty($this->currentAlias) && !empty($params[0])) $this->currentAlias = $params[0]; // check to see if we can load the page controller without an alias AlphaController::loadControllerDef($params[0]); self::$logger->debug('Page controller name set on the request URL is ['.$params[0].']'); $this->pageController = $params[0]; }catch (IllegalArguementException $iae) { // handle request with alias self::$logger->debug('The supplied controller alias is ['.$this->currentAlias.']'); // check to see if the controller is an alias for something if($this->checkAlias($this->currentAlias)) { $this->pageController = $this->getAliasController($this->currentAlias); self::$logger->debug('Page controller name obtained from the URL alias is ['.$this->pageController.']'); if(isset($params[1])) { if(!empty($_POST)) $_REQUEST[$this->getAliasParam($this->currentAlias)] = $params[1]; else $_GET[$this->getAliasParam($this->currentAlias)] = $params[1]; } } } self::$logger->debug('$params are ['.var_export($params, true).']'); self::$logger->debug('currentAlias is ['.$this->currentAlias.']'); // now populate the _GET vars if($this->currentAlias == 'tk') { self::$logger->debug('Setting the GET vars for a mod_rewrite request with a tk param'); $this->setEncrypt(true); $this->queryString = FrontController::decodeQueryParams($params[1]); $_GET['tk'] = $params[1]; $this->populateGetVars(); $this->pageController = $_GET['act']; }else{ $count = count($params); for($i = 1; $i < $count; $i+=2) { if(isset($params[$i+1])) { if(!empty($_POST)) $_REQUEST[$params[$i]] = $params[$i+1]; else $_GET[$params[$i]] = $params[$i+1]; } } } self::$logger->debug('$_GET is ['.var_export($_GET, true).']'); self::$logger->debug('<<handleModRewriteRequests'); } /** * Getter for the page controller * * @return string * @since 1.0 */ public function getPageController() { return $this->pageController; } /** * Add the supplied filter object to the list of filters ran on each request to the front controller * * @param AlphaFilterInterface $filterObject * @throws IllegalArguementException * @since 1.0 */ public function registerFilter($filterObject) { if($filterObject instanceof AlphaFilterInterface) array_push($this->filters, $filterObject); else throw new IllegalArguementException('Supplied filter object is not a valid AlphaFilterInterface instance!'); } /** * Returns the array of filters currently attached to this FrontController * * @return array * @since 1.0 */ public function getFilters() { return $this->filters; } } ?> Documentation generated on Thu, 17 Mar 2011 16:44:17 +0000 by phpDocumentor 1.4.3