tnhfw / tnh-fw

core/classes/Response.php

Indentation +481 added lines, -481 removed lines

@@ -1,536 +1,536 @@
 <?php
-	defined('ROOT_PATH') or exit('Access denied');
-	/**
-	 * TNH Framework
-	 *
-	 * A simple PHP framework using HMVC architecture
-	 *
-	 * This content is released under the GNU GPL License (GPL)
-	 *
-	 * Copyright (C) 2017 Tony NGUEREZA
-	 *
-	 * This program is free software; you can redistribute it and/or
-	 * modify it under the terms of the GNU General Public License
-	 * as published by the Free Software Foundation; either version 3
-	 * of the License, or (at your option) any later version.
-	 *
-	 * This program is distributed in the hope that it will be useful,
-	 * but WITHOUT ANY WARRANTY; without even the implied warranty of
-	 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	 * GNU General Public License for more details.
-	 *
-	 * You should have received a copy of the GNU General Public License
-	 * along with this program; if not, write to the Free Software
-	 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
-	*/
+    defined('ROOT_PATH') or exit('Access denied');
+    /**
+     * TNH Framework
+     *
+     * A simple PHP framework using HMVC architecture
+     *
+     * This content is released under the GNU GPL License (GPL)
+     *
+     * Copyright (C) 2017 Tony NGUEREZA
+     *
+     * This program is free software; you can redistribute it and/or
+     * modify it under the terms of the GNU General Public License
+     * as published by the Free Software Foundation; either version 3
+     * of the License, or (at your option) any later version.
+     *
+     * This program is distributed in the hope that it will be useful,
+     * but WITHOUT ANY WARRANTY; without even the implied warranty of
+     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+     * GNU General Public License for more details.
+     *
+     * You should have received a copy of the GNU General Public License
+     * along with this program; if not, write to the Free Software
+     * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+     */
 
-	class Response{
+    class Response{
 
-		/**
-		 * The list of request header to send with response
-		 * @var array
-		 */
-		private static $headers = array();
+        /**
+         * The list of request header to send with response
+         * @var array
+         */
+        private static $headers = array();
 
-		/**
-		 * The logger instance
-		 * @var object
-		 */
-		private static $logger;
+        /**
+         * The logger instance
+         * @var object
+         */
+        private static $logger;
 		
-		/**
-		 * The final page content to display to user
-		 * @var string
-		 */
-		private $_pageRender = null;
+        /**
+         * The final page content to display to user
+         * @var string
+         */
+        private $_pageRender = null;
 		
-		/**
-		 * The current request URL
-		 * @var string
-		 */
-		private $_currentUrl = null;
+        /**
+         * The current request URL
+         * @var string
+         */
+        private $_currentUrl = null;
 		
-		/**
-		 * The current request URL cache key
-		 * @var string
-		 */
-		private $_currentUrlCacheKey = null;
+        /**
+         * The current request URL cache key
+         * @var string
+         */
+        private $_currentUrlCacheKey = null;
 		
-		/**
-		* Whether we can compress the output using Gzip
-		* @var boolean
-		*/
-		private static $_canCompressOutput = false;
+        /**
+         * Whether we can compress the output using Gzip
+         * @var boolean
+         */
+        private static $_canCompressOutput = false;
 		
-		/**
-		 * Construct new response instance
-		 */
-		public function __construct(){
-			$currentUrl = '';
-			if (! empty($_SERVER['REQUEST_URI'])){
-				$currentUrl = $_SERVER['REQUEST_URI'];
-			}
-			if (! empty($_SERVER['QUERY_STRING'])){
-				$currentUrl .= '?' . $_SERVER['QUERY_STRING'];
-			}
-			$this->_currentUrl =  $currentUrl;
+        /**
+         * Construct new response instance
+         */
+        public function __construct(){
+            $currentUrl = '';
+            if (! empty($_SERVER['REQUEST_URI'])){
+                $currentUrl = $_SERVER['REQUEST_URI'];
+            }
+            if (! empty($_SERVER['QUERY_STRING'])){
+                $currentUrl .= '?' . $_SERVER['QUERY_STRING'];
+            }
+            $this->_currentUrl =  $currentUrl;
 					
-			$this->_currentUrlCacheKey = md5($this->_currentUrl);
+            $this->_currentUrlCacheKey = md5($this->_currentUrl);
 			
-			self::$_canCompressOutput = get_config('compress_output')
-										  && isset($_SERVER['HTTP_ACCEPT_ENCODING']) 
-										  && stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false 
-										  && extension_loaded('zlib')
-										  && (bool) ini_get('zlib.output_compression') === false;
-		}
+            self::$_canCompressOutput = get_config('compress_output')
+                                          && isset($_SERVER['HTTP_ACCEPT_ENCODING']) 
+                                          && stripos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') !== false 
+                                          && extension_loaded('zlib')
+                                          && (bool) ini_get('zlib.output_compression') === false;
+        }
 
 		
-		/**
-		 * The signleton of the logger
-		 * @return Object the Log instance
-		 */
-		public static function getLogger(){
-			if(self::$logger == null){
-				$logger = array();
-				$logger[0] =& class_loader('Log', 'classes');
-				$logger[0]->setLogger('Library::Response');
-				self::$logger = $logger[0];
-			}
-			return self::$logger;			
-		}
+        /**
+         * The signleton of the logger
+         * @return Object the Log instance
+         */
+        public static function getLogger(){
+            if(self::$logger == null){
+                $logger = array();
+                $logger[0] =& class_loader('Log', 'classes');
+                $logger[0]->setLogger('Library::Response');
+                self::$logger = $logger[0];
+            }
+            return self::$logger;			
+        }
 
-		/**
-		 * Set the log instance for future use
-		 * @param object $logger the log object
-		 * @return object the log instance
-		 */
-		public static function setLogger($logger){
-			self::$logger = $logger;
-			return self::$logger;
-		}
+        /**
+         * Set the log instance for future use
+         * @param object $logger the log object
+         * @return object the log instance
+         */
+        public static function setLogger($logger){
+            self::$logger = $logger;
+            return self::$logger;
+        }
 
 
-		/**
-		 * Send the HTTP Response headers
-		 * @param  integer $httpCode the HTTP status code
-		 * @param  array   $headers   the additional headers to add to the existing headers list
-		 */
-		public static function sendHeaders($httpCode = 200, array $headers = array()){
-			set_http_status_header($httpCode);
-			self::setHeaders($headers);
-			if(! headers_sent()){
-				foreach(self::getHeaders() as $key => $value){
-					header($key .': '.$value);
-				}
-			}
-		}
+        /**
+         * Send the HTTP Response headers
+         * @param  integer $httpCode the HTTP status code
+         * @param  array   $headers   the additional headers to add to the existing headers list
+         */
+        public static function sendHeaders($httpCode = 200, array $headers = array()){
+            set_http_status_header($httpCode);
+            self::setHeaders($headers);
+            if(! headers_sent()){
+                foreach(self::getHeaders() as $key => $value){
+                    header($key .': '.$value);
+                }
+            }
+        }
 
-		/**
-		 * Get the list of the headers
-		 * @return array the headers list
-		 */
-		public static function getHeaders(){
-			return self::$headers;
-		}
+        /**
+         * Get the list of the headers
+         * @return array the headers list
+         */
+        public static function getHeaders(){
+            return self::$headers;
+        }
 
-		/**
-		 * Get the header value for the given name
-		 * @param  string $name the header name
-		 * @return string|null       the header value
-		 */
-		public static function getHeader($name){
-			if(array_key_exists($name, self::$headers)){
-				return self::$headers[$name];
-			}
-			return null;
-		}
+        /**
+         * Get the header value for the given name
+         * @param  string $name the header name
+         * @return string|null       the header value
+         */
+        public static function getHeader($name){
+            if(array_key_exists($name, self::$headers)){
+                return self::$headers[$name];
+            }
+            return null;
+        }
 
 
-		/**
-		 * Set the header value for the specified name
-		 * @param string $name  the header name
-		 * @param string $value the header value to be set
-		 */
-		public static function setHeader($name, $value){
-			self::$headers[$name] = $value;
-		}
+        /**
+         * Set the header value for the specified name
+         * @param string $name  the header name
+         * @param string $value the header value to be set
+         */
+        public static function setHeader($name, $value){
+            self::$headers[$name] = $value;
+        }
 
-		/**
-		 * Set the headers using array
-		 * @param array $headers the list of the headers to set. 
-		 * Note: this will merge with the existing headers
-		 */
-		public static function setHeaders(array $headers){
-			self::$headers = array_merge(self::getHeaders(), $headers);
-		}
+        /**
+         * Set the headers using array
+         * @param array $headers the list of the headers to set. 
+         * Note: this will merge with the existing headers
+         */
+        public static function setHeaders(array $headers){
+            self::$headers = array_merge(self::getHeaders(), $headers);
+        }
 		
-		/**
-		 * Redirect user to the specified page
-		 * @param  string $path the URL or URI to be redirect to
-		 */
-		public static function redirect($path = ''){
-			$logger = self::getLogger();
-			$url = Url::site_url($path);
-			$logger->info('Redirect to URL [' .$url. ']');
-			if(! headers_sent()){
-				header('Location: '.$url);
-				exit;
-			}
-			echo '<script>
+        /**
+         * Redirect user to the specified page
+         * @param  string $path the URL or URI to be redirect to
+         */
+        public static function redirect($path = ''){
+            $logger = self::getLogger();
+            $url = Url::site_url($path);
+            $logger->info('Redirect to URL [' .$url. ']');
+            if(! headers_sent()){
+                header('Location: '.$url);
+                exit;
+            }
+            echo '<script>
 					location.href = "'.$url.'";
 				</script>';
-		}
+        }
 
-		/**
-		 * Render the view to display later or return the content
-		 * @param  string  $view   the view name or path
-		 * @param  array|object   $data   the variable data to use in the view
-		 * @param  boolean $return whether to return the view generated content or display it directly
-		 * @return void|string          if $return is true will return the view content otherwise
-		 * will display the view content.
-		 */
-		public function render($view, $data = null, $return = false){
-			$logger = self::getLogger();
-			//convert data to an array
-			$data = (array) $data;
-			$view = str_ireplace('.php', '', $view);
-			$view = trim($view, '/\\');
-			$viewFile = $view . '.php';
-			$path = APPS_VIEWS_PATH . $viewFile;
+        /**
+         * Render the view to display later or return the content
+         * @param  string  $view   the view name or path
+         * @param  array|object   $data   the variable data to use in the view
+         * @param  boolean $return whether to return the view generated content or display it directly
+         * @return void|string          if $return is true will return the view content otherwise
+         * will display the view content.
+         */
+        public function render($view, $data = null, $return = false){
+            $logger = self::getLogger();
+            //convert data to an array
+            $data = (array) $data;
+            $view = str_ireplace('.php', '', $view);
+            $view = trim($view, '/\\');
+            $viewFile = $view . '.php';
+            $path = APPS_VIEWS_PATH . $viewFile;
 			
-			//check in module first
-			$logger->debug('Checking the view [' . $view . '] from module list ...');
-			$moduleInfo = $this->getModuleInfoForView($view);
-			$module    = $moduleInfo['module'];
-			$view  = $moduleInfo['view'];
+            //check in module first
+            $logger->debug('Checking the view [' . $view . '] from module list ...');
+            $moduleInfo = $this->getModuleInfoForView($view);
+            $module    = $moduleInfo['module'];
+            $view  = $moduleInfo['view'];
 			
-			$moduleViewPath = Module::findViewFullPath($view, $module);
-			if($moduleViewPath){
-				$path = $moduleViewPath;
-				$logger->info('Found view [' . $view . '] in module [' .$module. '], the file path is [' .$moduleViewPath. '] we will used it');
-			}
-			else{
-				$logger->info('Cannot find view [' . $view . '] in module [' .$module. '] using the default location');
-			}
+            $moduleViewPath = Module::findViewFullPath($view, $module);
+            if($moduleViewPath){
+                $path = $moduleViewPath;
+                $logger->info('Found view [' . $view . '] in module [' .$module. '], the file path is [' .$moduleViewPath. '] we will used it');
+            }
+            else{
+                $logger->info('Cannot find view [' . $view . '] in module [' .$module. '] using the default location');
+            }
 			
-			$logger->info('The view file path to be loaded is [' . $path . ']');
+            $logger->info('The view file path to be loaded is [' . $path . ']');
 			
-			/////////
-			if($return){
-				return $this->loadView($path, $data, true);
-			}
-			$this->loadView($path, $data, false);
-		}
+            /////////
+            if($return){
+                return $this->loadView($path, $data, true);
+            }
+            $this->loadView($path, $data, false);
+        }
 
 		
-		/**
-		* Send the final page output to user
-		*/
-		public function renderFinalPage(){
-			$logger = self::getLogger();
-			$obj = & get_instance();
-			$cachePageStatus = get_config('cache_enable', false) && !empty($obj->view_cache_enable);
-			$dispatcher = $obj->eventdispatcher;
-			$content = $this->_pageRender;
-			if(! $content){
-				$logger->warning('The final view content is empty.');
-				return;
-			}
-			//dispatch
-			$event = $dispatcher->dispatch(new EventInfo('FINAL_VIEW_READY', $content, true));
-			$content = null;
-			if(! empty($event->payload)){
-				$content = $event->payload;
-			}
-			if(empty($content)){
-				$logger->warning('The view content is empty after dispatch to event listeners.');
-			}
+        /**
+         * Send the final page output to user
+         */
+        public function renderFinalPage(){
+            $logger = self::getLogger();
+            $obj = & get_instance();
+            $cachePageStatus = get_config('cache_enable', false) && !empty($obj->view_cache_enable);
+            $dispatcher = $obj->eventdispatcher;
+            $content = $this->_pageRender;
+            if(! $content){
+                $logger->warning('The final view content is empty.');
+                return;
+            }
+            //dispatch
+            $event = $dispatcher->dispatch(new EventInfo('FINAL_VIEW_READY', $content, true));
+            $content = null;
+            if(! empty($event->payload)){
+                $content = $event->payload;
+            }
+            if(empty($content)){
+                $logger->warning('The view content is empty after dispatch to event listeners.');
+            }
 			
-			//check whether need save the page into cache.
-			if($cachePageStatus){
-				$this->savePageContentIntoCache($content);
-			}
+            //check whether need save the page into cache.
+            if($cachePageStatus){
+                $this->savePageContentIntoCache($content);
+            }
 			
-			// Parse out the elapsed time and memory usage,
-			// then swap the pseudo-variables with the data
-			$elapsedTime = $obj->benchmark->elapsedTime('APP_EXECUTION_START', 'APP_EXECUTION_END');
-			$memoryUsage	= round($obj->benchmark->memoryUsage('APP_EXECUTION_START', 'APP_EXECUTION_END') / 1024 / 1024, 6) . 'MB';
-			$content = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsedTime, $memoryUsage), $content);
+            // Parse out the elapsed time and memory usage,
+            // then swap the pseudo-variables with the data
+            $elapsedTime = $obj->benchmark->elapsedTime('APP_EXECUTION_START', 'APP_EXECUTION_END');
+            $memoryUsage	= round($obj->benchmark->memoryUsage('APP_EXECUTION_START', 'APP_EXECUTION_END') / 1024 / 1024, 6) . 'MB';
+            $content = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsedTime, $memoryUsage), $content);
 			
-			//compress the output if is available
-			$type = null;
-			if (self::$_canCompressOutput){
-				$type = 'ob_gzhandler';
-			}
-			ob_start($type);
-			self::sendHeaders(200);
-			echo $content;
-			ob_end_flush();
-		}
+            //compress the output if is available
+            $type = null;
+            if (self::$_canCompressOutput){
+                $type = 'ob_gzhandler';
+            }
+            ob_start($type);
+            self::sendHeaders(200);
+            echo $content;
+            ob_end_flush();
+        }
 
 		
-		/**
-		* Send the final page output to user if is cached
-		* @param object $cache the cache instance
-		*
-		* @return boolean whether the page content if available or not
-		*/
-		public function renderFinalPageFromCache(&$cache){
-			$logger = self::getLogger();
-			//the current page cache key for identification
-			$pageCacheKey = $this->_currentUrlCacheKey;
+        /**
+         * Send the final page output to user if is cached
+         * @param object $cache the cache instance
+         *
+         * @return boolean whether the page content if available or not
+         */
+        public function renderFinalPageFromCache(&$cache){
+            $logger = self::getLogger();
+            //the current page cache key for identification
+            $pageCacheKey = $this->_currentUrlCacheKey;
 			
-			$logger->debug('Checking if the page content for the URL [' . $this->_currentUrl . '] is cached ...');
-			//get the cache information to prepare header to send to browser
-			$cacheInfo = $cache->getInfo($pageCacheKey);
-			if($cacheInfo){
-				$status = $this->sendCacheNotYetExpireInfo($cacheInfo);
-				if($status === false){
-					return $this->sendPageContentToBrowser($cache);
-				}
-			}
-			return false;
-		}
+            $logger->debug('Checking if the page content for the URL [' . $this->_currentUrl . '] is cached ...');
+            //get the cache information to prepare header to send to browser
+            $cacheInfo = $cache->getInfo($pageCacheKey);
+            if($cacheInfo){
+                $status = $this->sendCacheNotYetExpireInfo($cacheInfo);
+                if($status === false){
+                    return $this->sendPageContentToBrowser($cache);
+                }
+            }
+            return false;
+        }
 	
 		
-		/**
-		* Get the final page to be rendered
-		* @return string
-		*/
-		public function getFinalPageRendered(){
-			return $this->_pageRender;
-		}
+        /**
+         * Get the final page to be rendered
+         * @return string
+         */
+        public function getFinalPageRendered(){
+            return $this->_pageRender;
+        }
 
-		/**
-		 * Send the HTTP 404 error if can not found the 
-		 * routing information for the current request
-		 */
-		public static function send404(){
-			/********* for logs **************/
-			//can't use $obj = & get_instance()  here because the global super object will be available until
-			//the main controller is loaded even for Loader::library('xxxx');
-			$logger = self::getLogger();
-			$request =& class_loader('Request', 'classes');
-			$userAgent =& class_loader('Browser');
-			$browser = $userAgent->getPlatform().', '.$userAgent->getBrowser().' '.$userAgent->getVersion();
+        /**
+         * Send the HTTP 404 error if can not found the 
+         * routing information for the current request
+         */
+        public static function send404(){
+            /********* for logs **************/
+            //can't use $obj = & get_instance()  here because the global super object will be available until
+            //the main controller is loaded even for Loader::library('xxxx');
+            $logger = self::getLogger();
+            $request =& class_loader('Request', 'classes');
+            $userAgent =& class_loader('Browser');
+            $browser = $userAgent->getPlatform().', '.$userAgent->getBrowser().' '.$userAgent->getVersion();
 			
-			//here can't use Loader::functions just include the helper manually
-			require_once CORE_FUNCTIONS_PATH . 'function_user_agent.php';
+            //here can't use Loader::functions just include the helper manually
+            require_once CORE_FUNCTIONS_PATH . 'function_user_agent.php';
 
-			$str = '[404 page not found] : ';
-			$str .= ' Unable to find the request page [' . $request->requestUri() . ']. The visitor IP address [' . get_ip() . '], browser [' . $browser . ']';
-			$logger->error($str);
-			/***********************************/
-			$path = CORE_VIEWS_PATH . '404.php';
-			if(file_exists($path)){
-				//compress the output if is available
-				$type = null;
-				if (self::$_canCompressOutput){
-					$type = 'ob_gzhandler';
-				}
-				ob_start($type);
-				require_once $path;
-				$output = ob_get_clean();
-				self::sendHeaders(404);
-				echo $output;
-			}
-			else{
-				show_error('The 404 view [' .$path. '] does not exist');
-			}
-		}
+            $str = '[404 page not found] : ';
+            $str .= ' Unable to find the request page [' . $request->requestUri() . ']. The visitor IP address [' . get_ip() . '], browser [' . $browser . ']';
+            $logger->error($str);
+            /***********************************/
+            $path = CORE_VIEWS_PATH . '404.php';
+            if(file_exists($path)){
+                //compress the output if is available
+                $type = null;
+                if (self::$_canCompressOutput){
+                    $type = 'ob_gzhandler';
+                }
+                ob_start($type);
+                require_once $path;
+                $output = ob_get_clean();
+                self::sendHeaders(404);
+                echo $output;
+            }
+            else{
+                show_error('The 404 view [' .$path. '] does not exist');
+            }
+        }
 
-		/**
-		 * Display the error to user
-		 * @param  array  $data the error information
-		 */
-		public static function sendError(array $data = array()){
-			$path = CORE_VIEWS_PATH . 'errors.php';
-			if(file_exists($path)){
-				//compress the output if is available
-				$type = null;
-				if (self::$_canCompressOutput){
-					$type = 'ob_gzhandler';
-				}
-				ob_start($type);
-				extract($data);
-				require_once $path;
-				$output = ob_get_clean();
-				self::sendHeaders(503);
-				echo $output;
-			}
-			else{
-				//can't use show_error() at this time because some dependencies not yet loaded and to prevent loop
-				set_http_status_header(503);
-				echo 'The error view [' . $path . '] does not exist';
-			}
-		}
+        /**
+         * Display the error to user
+         * @param  array  $data the error information
+         */
+        public static function sendError(array $data = array()){
+            $path = CORE_VIEWS_PATH . 'errors.php';
+            if(file_exists($path)){
+                //compress the output if is available
+                $type = null;
+                if (self::$_canCompressOutput){
+                    $type = 'ob_gzhandler';
+                }
+                ob_start($type);
+                extract($data);
+                require_once $path;
+                $output = ob_get_clean();
+                self::sendHeaders(503);
+                echo $output;
+            }
+            else{
+                //can't use show_error() at this time because some dependencies not yet loaded and to prevent loop
+                set_http_status_header(503);
+                echo 'The error view [' . $path . '] does not exist';
+            }
+        }
 
-		/**
-		 * Send the cache not yet expire to browser
-		 * @param  array $cacheInfo the cache information
-		 * @return boolean            true if the information is sent otherwise false
-		 */
-		protected function sendCacheNotYetExpireInfo($cacheInfo){
-			if(! empty($cacheInfo)){
-				$logger = self::getLogger();
-				$lastModified = $cacheInfo['mtime'];
-				$expire = $cacheInfo['expire'];
-				$maxAge = $expire - $_SERVER['REQUEST_TIME'];
-				self::setHeader('Pragma', 'public');
-				self::setHeader('Cache-Control', 'max-age=' . $maxAge . ', public');
-				self::setHeader('Expires', gmdate('D, d M Y H:i:s', $expire).' GMT');
-				self::setHeader('Last-modified', gmdate('D, d M Y H:i:s', $lastModified).' GMT');
-				if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $lastModified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])){
-					$logger->info('The cache page content is not yet expire for the URL [' . $this->_currentUrl . '] send 304 header to browser');
-					self::sendHeaders(304);
-					return true;
-				}
-			}
-			return false;
-		}
+        /**
+         * Send the cache not yet expire to browser
+         * @param  array $cacheInfo the cache information
+         * @return boolean            true if the information is sent otherwise false
+         */
+        protected function sendCacheNotYetExpireInfo($cacheInfo){
+            if(! empty($cacheInfo)){
+                $logger = self::getLogger();
+                $lastModified = $cacheInfo['mtime'];
+                $expire = $cacheInfo['expire'];
+                $maxAge = $expire - $_SERVER['REQUEST_TIME'];
+                self::setHeader('Pragma', 'public');
+                self::setHeader('Cache-Control', 'max-age=' . $maxAge . ', public');
+                self::setHeader('Expires', gmdate('D, d M Y H:i:s', $expire).' GMT');
+                self::setHeader('Last-modified', gmdate('D, d M Y H:i:s', $lastModified).' GMT');
+                if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $lastModified <= strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE'])){
+                    $logger->info('The cache page content is not yet expire for the URL [' . $this->_currentUrl . '] send 304 header to browser');
+                    self::sendHeaders(304);
+                    return true;
+                }
+            }
+            return false;
+        }
 
-		/**
-		 * Send the page content from cache to browser
-		 * @param object $cache the cache instance
-		 * @return boolean     the status of the operation
-		 */
-		protected function sendPageContentToBrowser(&$cache){
-			$logger = self::getLogger();
-			$logger->info('The cache page content is expired or the browser doesn\'t send the HTTP_IF_MODIFIED_SINCE header for the URL [' . $this->_currentUrl . '] send cache headers to tell the browser');
-			self::sendHeaders(200);
-			//current page cache key
-			$pageCacheKey = $this->_currentUrlCacheKey;
-			//get the cache content
-			$content = $cache->get($pageCacheKey);
-			if($content){
-				$logger->info('The page content for the URL [' . $this->_currentUrl . '] already cached just display it');
-				//load benchmark class
-				$benchmark = & class_loader('Benchmark');
+        /**
+         * Send the page content from cache to browser
+         * @param object $cache the cache instance
+         * @return boolean     the status of the operation
+         */
+        protected function sendPageContentToBrowser(&$cache){
+            $logger = self::getLogger();
+            $logger->info('The cache page content is expired or the browser doesn\'t send the HTTP_IF_MODIFIED_SINCE header for the URL [' . $this->_currentUrl . '] send cache headers to tell the browser');
+            self::sendHeaders(200);
+            //current page cache key
+            $pageCacheKey = $this->_currentUrlCacheKey;
+            //get the cache content
+            $content = $cache->get($pageCacheKey);
+            if($content){
+                $logger->info('The page content for the URL [' . $this->_currentUrl . '] already cached just display it');
+                //load benchmark class
+                $benchmark = & class_loader('Benchmark');
 				
-				// Parse out the elapsed time and memory usage,
-				// then swap the pseudo-variables with the data
-				$elapsedTime = $benchmark->elapsedTime('APP_EXECUTION_START', 'APP_EXECUTION_END');
-				$memoryUsage	= round($benchmark->memoryUsage('APP_EXECUTION_START', 'APP_EXECUTION_END') / 1024 / 1024, 6) . 'MB';
-				$content = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsedTime, $memoryUsage), $content);
+                // Parse out the elapsed time and memory usage,
+                // then swap the pseudo-variables with the data
+                $elapsedTime = $benchmark->elapsedTime('APP_EXECUTION_START', 'APP_EXECUTION_END');
+                $memoryUsage	= round($benchmark->memoryUsage('APP_EXECUTION_START', 'APP_EXECUTION_END') / 1024 / 1024, 6) . 'MB';
+                $content = str_replace(array('{elapsed_time}', '{memory_usage}'), array($elapsedTime, $memoryUsage), $content);
 				
-				///display the final output
-				//compress the output if is available
-				$type = null;
-				if (self::$_canCompressOutput){
-					$type = 'ob_gzhandler';
-				}
-				ob_start($type);
-				echo $content;
-				ob_end_flush();
-				return true;
-			}
-			$logger->info('The page cache content for the URL [' . $this->_currentUrl . '] is not valid may be already expired');
-			$cache->delete($pageCacheKey);
-			return false;
-		}
+                ///display the final output
+                //compress the output if is available
+                $type = null;
+                if (self::$_canCompressOutput){
+                    $type = 'ob_gzhandler';
+                }
+                ob_start($type);
+                echo $content;
+                ob_end_flush();
+                return true;
+            }
+            $logger->info('The page cache content for the URL [' . $this->_currentUrl . '] is not valid may be already expired');
+            $cache->delete($pageCacheKey);
+            return false;
+        }
 
-		/**
-		 * Save the content of page into cache
-		 * @param  string $content the page content to be saved
-		 * @return void
-		 */
-		protected function savePageContentIntoCache($content){
-			$obj = & get_instance();
-			$logger = self::getLogger();
+        /**
+         * Save the content of page into cache
+         * @param  string $content the page content to be saved
+         * @return void
+         */
+        protected function savePageContentIntoCache($content){
+            $obj = & get_instance();
+            $logger = self::getLogger();
 
-			//current page URL
-			$url = $this->_currentUrl;
-			//Cache view Time to live in second
-			$viewCacheTtl = get_config('cache_ttl');
-			if (!empty($obj->view_cache_ttl)){
-				$viewCacheTtl = $obj->view_cache_ttl;
-			}
-			//the cache handler instance
-			$cacheInstance = $obj->cache;
-			//the current page cache key for identification
-			$cacheKey = $this->_currentUrlCacheKey;
+            //current page URL
+            $url = $this->_currentUrl;
+            //Cache view Time to live in second
+            $viewCacheTtl = get_config('cache_ttl');
+            if (!empty($obj->view_cache_ttl)){
+                $viewCacheTtl = $obj->view_cache_ttl;
+            }
+            //the cache handler instance
+            $cacheInstance = $obj->cache;
+            //the current page cache key for identification
+            $cacheKey = $this->_currentUrlCacheKey;
 			
-			$logger->debug('Save the page content for URL [' . $url . '] into the cache ...');
-			$cacheInstance->set($cacheKey, $content, $viewCacheTtl);
+            $logger->debug('Save the page content for URL [' . $url . '] into the cache ...');
+            $cacheInstance->set($cacheKey, $content, $viewCacheTtl);
 			
-			//get the cache information to prepare header to send to browser
-			$cacheInfo = $cacheInstance->getInfo($cacheKey);
-			if($cacheInfo){
-				$lastModified = $cacheInfo['mtime'];
-				$expire = $cacheInfo['expire'];
-				$maxAge = $expire - time();
-				self::setHeader('Pragma', 'public');
-				self::setHeader('Cache-Control', 'max-age=' . $maxAge . ', public');
-				self::setHeader('Expires', gmdate('D, d M Y H:i:s', $expire).' GMT');
-				self::setHeader('Last-modified', gmdate('D, d M Y H:i:s', $lastModified).' GMT');	
-			}
-		}
+            //get the cache information to prepare header to send to browser
+            $cacheInfo = $cacheInstance->getInfo($cacheKey);
+            if($cacheInfo){
+                $lastModified = $cacheInfo['mtime'];
+                $expire = $cacheInfo['expire'];
+                $maxAge = $expire - time();
+                self::setHeader('Pragma', 'public');
+                self::setHeader('Cache-Control', 'max-age=' . $maxAge . ', public');
+                self::setHeader('Expires', gmdate('D, d M Y H:i:s', $expire).' GMT');
+                self::setHeader('Last-modified', gmdate('D, d M Y H:i:s', $lastModified).' GMT');	
+            }
+        }
 		
 
-		/**
-		 * Get the module information for the view to load
-		 * @param  string $view the view name like moduleName/viewName, viewName
-		 * 
-		 * @return array        the module information
-		 * array(
-		 * 	'module'=> 'module_name'
-		 * 	'view' => 'view_name'
-		 * 	'viewFile' => 'view_file'
-		 * )
-		 */
-		protected  function getModuleInfoForView($view){
-			$module = null;
-			$viewFile = null;
-			$obj = & get_instance();
-			//check if the request class contains module name
-			if(strpos($view, '/') !== false){
-				$viewPath = explode('/', $view);
-				if(isset($viewPath[0]) && in_array($viewPath[0], Module::getModuleList())){
-					$module = $viewPath[0];
-					array_shift($viewPath);
-					$view = implode('/', $viewPath);
-					$viewFile = $view . '.php';
-				}
-			}
-			if(! $module && !empty($obj->moduleName)){
-				$module = $obj->moduleName;
-			}
-			return array(
-						'view' => $view,
-						'module' => $module,
-						'viewFile' => $viewFile
-					);
-		}
+        /**
+         * Get the module information for the view to load
+         * @param  string $view the view name like moduleName/viewName, viewName
+         * 
+         * @return array        the module information
+         * array(
+         * 	'module'=> 'module_name'
+         * 	'view' => 'view_name'
+         * 	'viewFile' => 'view_file'
+         * )
+         */
+        protected  function getModuleInfoForView($view){
+            $module = null;
+            $viewFile = null;
+            $obj = & get_instance();
+            //check if the request class contains module name
+            if(strpos($view, '/') !== false){
+                $viewPath = explode('/', $view);
+                if(isset($viewPath[0]) && in_array($viewPath[0], Module::getModuleList())){
+                    $module = $viewPath[0];
+                    array_shift($viewPath);
+                    $view = implode('/', $viewPath);
+                    $viewFile = $view . '.php';
+                }
+            }
+            if(! $module && !empty($obj->moduleName)){
+                $module = $obj->moduleName;
+            }
+            return array(
+                        'view' => $view,
+                        'module' => $module,
+                        'viewFile' => $viewFile
+                    );
+        }
 
-		/**
-		 * Render the view page
-		 * @see  Response::render
-		 * @return void|string
-		 */
-		protected  function loadView($path, array $data = array(), $return = false){
-			$found = false;
-			if(file_exists($path)){
-				//super instance
-				$obj = & get_instance();
-				foreach(get_object_vars($obj) as $key => $value){
-					if(! isset($this->{$key})){
-						$this->{$key} = & $obj->{$key};
-					}
-				}
-				ob_start();
-				extract($data);
-				//need use require() instead of require_once because can load this view many time
-				require $path;
-				$content = ob_get_clean();
-				if($return){
-					return $content;
-				}
-				$this->_pageRender .= $content;
-				$found = true;
-			}
-			if(! $found){
-				show_error('Unable to find view [' .$view . ']');
-			}
-		}
+        /**
+         * Render the view page
+         * @see  Response::render
+         * @return void|string
+         */
+        protected  function loadView($path, array $data = array(), $return = false){
+            $found = false;
+            if(file_exists($path)){
+                //super instance
+                $obj = & get_instance();
+                foreach(get_object_vars($obj) as $key => $value){
+                    if(! isset($this->{$key})){
+                        $this->{$key} = & $obj->{$key};
+                    }
+                }
+                ob_start();
+                extract($data);
+                //need use require() instead of require_once because can load this view many time
+                require $path;
+                $content = ob_get_clean();
+                if($return){
+                    return $content;
+                }
+                $this->_pageRender .= $content;
+                $found = true;
+            }
+            if(! $found){
+                show_error('Unable to find view [' .$view . ']');
+            }
+        }
 
-	}
+    }