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supercache.controller.php
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supercache.controller.php
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<?php
/**
* Super Cache module: controller class
*
* Copyright (c) 2016 Kijin Sung <kijin@kijinsung.com>
* All rights reserved.
*
* 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 2 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, see <http://www.gnu.org/licenses/>.
*/
class SuperCacheController extends SuperCache
{
/**
* Flag to cache the current request.
*/
protected $_defaultUrlChecked = false;
protected $_cacheCurrentSearch = false;
protected $_cacheCurrentRequest = null;
protected $_cacheStartTimestamp = null;
protected $_cacheHttpStatusCode = 200;
/**
* Trigger called at moduleHandler.init (before)
*/
public function triggerBeforeModuleHandlerInit($obj)
{
// Get module configuration and request information.
$config = $this->getConfig();
$current_domain = preg_replace('/:\d+$/', '', $_SERVER['HTTP_HOST']);
$request_method = Context::getRequestMethod();
// Check the Accept: header for erroneous CSS and image requests.
if ($request_method === 'GET' && isset($_SERVER['HTTP_REFERER']) && parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST) === $current_domain)
{
$accept_header = isset($_SERVER['HTTP_ACCEPT']) ? $_SERVER['HTTP_ACCEPT'] : '';
if ($config->block_css_request && !strncmp($accept_header, 'text/css', 8))
{
return $this->terminateWithPlainText('/* block_css_request */');
}
if ($config->block_img_request && $accept_header && !strpos($_SERVER['HTTP_USER_AGENT'], 'MSIE') && !strncmp($accept_header, 'image/', 6) && !preg_match('/\b(?:ht|x)ml\b/', $accept_header))
{
return $this->terminateWithPlainText('/* block_img_request */');
}
}
// Check the default URL.
if ($config->redirect_to_default_url && $request_method === 'GET')
{
$default_url = parse_url(Context::getDefaultUrl());
if ($current_domain !== $default_url['host'])
{
$redirect_url = sprintf('%s://%s%s%s', $default_url['scheme'], $default_url['host'], $default_url['port'] ? (':' . $default_url['port']) : '', $_SERVER['REQUEST_URI']);
return $this->terminateRedirectTo($redirect_url);
}
else
{
$this->_defaultUrlChecked = true;
}
}
// Check the full page cache (if not delayed).
if ($config->full_cache && !$config->full_cache_delay_trigger)
{
$this->checkFullPageCache($obj, $config);
}
}
/**
* Trigger called at moduleHandler.init (after)
*/
public function triggerAfterModuleHandlerInit($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Check the full page cache (if delayed).
if ($config->full_cache && $config->full_cache_delay_trigger)
{
$this->checkFullPageCache($obj, $config);
}
// Fill the page variable for paging cache.
if ($config->paging_cache)
{
$this->fillPageVariable($obj, $config);
}
// Register autoloaders for documentItem and commentItem, because some versions of XE fail to autoload them.
spl_autoload_register(function($class) {
if (preg_match('/^(document|comment)item$/', strtolower($class), $matches))
{
include_once sprintf('%1$smodules/%2$s/%2$s.item.php', _XE_PATH_, $matches[1]);
}
});
}
/**
* Trigger called at document.getDocumentList (before)
*/
public function triggerBeforeGetDocumentList($obj)
{
// Get module configuration.
$config = $this->getConfig();
if ((!$config->paging_cache && !$config->search_cache) || (!$obj->mid && !$obj->module_srl))
{
return;
}
// If this is a POST search request (often caused by sketchbook skin), abort to prevent double searching.
if ($config->disable_post_search && $_SERVER['REQUEST_METHOD'] === 'POST' && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest' && !$_POST['act'] && $obj->search_keyword)
{
return $this->terminateRequest('disable_post_search');
}
// Abort if an alternate list has already been set.
if ($obj->use_alternate_output)
{
return;
}
// Abort if there are search queries, but activate the search result cache.
if ($obj->search_target || $obj->search_keyword || $obj->exclude_module_srl || $obj->start_date || $obj->end_date || $obj->member_srl)
{
if ($config->search_cache && $obj->search_target && Context::getRequestMethod() === 'GET' && Context::get('module') !== 'admin' && !Context::get('act'))
{
$oModel = getModel('supercache');
if ($cached_search_result = $oModel->getSearchResultCache($obj))
{
$obj->use_alternate_output = $cached_search_result;
}
else
{
$this->_cacheCurrentSearch = $obj;
}
}
return;
}
// Abort if this request is for any page greater than 1, unless offset queries are enabled.
if ($obj->page > 1 && !$config->paging_cache_use_offset)
{
return;
}
// Abort if there are any other unusual search options.
$oDocumentModel = getModel('document');
$oDocumentModel->_setSearchOption($obj, $args, $query_id, $use_division);
if ($query_id !== 'document.getDocumentList' || $use_division || (is_array($args->module_srl) && count($args->module_srl) > 1))
{
return;
}
// Abort if the module is excluded by configuration.
if (isset($config->paging_cache_exclude_modules[$args->module_srl]))
{
return;
}
// Abort if the module/category has fewer documents than the threshold.
$oModel = getModel('supercache');
$document_count = $oModel->getDocumentCount($args->module_srl, $args->category_srl);
if ($document_count < $config->paging_cache_threshold)
{
return;
}
// Add offset to simulate paging.
if ($config->paging_cache_use_offset && $args->page > 1)
{
$args->list_offset = ($args->page - 1) * $args->list_count;
}
// Get documents and replace the output.
$obj->use_alternate_output = $oModel->getDocumentList($args, $document_count);
}
/**
* Trigger called at document.getDocumentList (after)
*/
public function triggerAfterGetDocumentList($obj)
{
// Cache the current search.
if ($this->_cacheCurrentSearch)
{
$oModel = getModel('supercache');
$oModel->setSearchResultCache($this->_cacheCurrentSearch, $obj);
$this->_cacheCurrentSearch = false;
}
}
/**
* Trigger called at document.insertDocument (after)
*/
public function triggerAfterInsertDocument($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Update document count for pagination cache.
$oModel = getModel('supercache');
if ($config->paging_cache)
{
$oModel->updateDocumentCount($obj->module_srl, $obj->category_srl, 1);
}
// Refresh full page cache for the current module and/or index module.
if ($config->full_cache && $config->full_cache_document_action)
{
if (isset($config->full_cache_document_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteFullPageCache($obj->module_srl, 0);
}
if (isset($config->full_cache_document_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if ($index_module_srl != $obj->module_srl || !isset($config->full_cache_document_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_document_action)
{
if (isset($config->search_cache_document_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteSearchResultCache($obj->module_srl, false);
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_document && $obj->module_srl)
{
$oModel->invalidateWidgetCache($obj->module_srl);
}
}
/**
* Trigger called at document.updateDocument (after)
*/
public function triggerAfterUpdateDocument($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Get the old and new values of module_srl and category_srl.
$original = getModel('document')->getDocument($obj->document_srl);
$original_module_srl = intval($original->get('module_srl'));
$original_category_srl = intval($original->get('category_srl'));
$new_module_srl = intval($obj->module_srl) ?: $original_module_srl;
$new_category_srl = intval($obj->category_srl) ?: $original_category_srl;
// Update document count for pagination cache.
$oModel = getModel('supercache');
if ($config->paging_cache && ($original_module_srl !== $new_module_srl || $original_category_srl !== $new_category_srl))
{
$oModel->updateDocumentCount($new_module_srl, $new_category_srl, 1);
if ($original_module_srl)
{
$oModel->updateDocumentCount($original_module_srl, $original_category_srl, -1);
}
}
// Refresh full page cache for the current document, module, and/or index module.
if ($config->full_cache && $config->full_cache_document_action)
{
if (isset($config->full_cache_document_action['refresh_document']))
{
$oModel->deleteFullPageCache(0, $obj->document_srl);
}
if (isset($config->full_cache_document_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteFullPageCache($original_module_srl, 0);
if ($original_module_srl !== $new_module_srl)
{
$oModel->deleteFullPageCache($new_module_srl, 0);
}
}
if (isset($config->full_cache_document_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if (($index_module_srl != $original_module_srl && $index_module_srl != $new_module_srl) || !isset($config->full_cache_document_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_document_action)
{
if (isset($config->search_cache_document_action['refresh_module']))
{
if ($original_module_srl)
{
$oModel->deleteSearchResultCache($original_module_srl, false);
}
if ($new_module_srl && ($original_module_srl !== $new_module_srl))
{
$oModel->deleteSearchResultCache($new_module_srl, false);
}
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_document)
{
if ($original_module_srl)
{
$oModel->invalidateWidgetCache($original_module_srl);
}
if ($new_module_srl && ($original_module_srl !== $new_module_srl))
{
$oModel->invalidateWidgetCache($new_module_srl);
}
}
}
/**
* Trigger called at document.deleteDocument (after)
*/
public function triggerAfterDeleteDocument($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Update document count for pagination cache.
$oModel = getModel('supercache');
if ($config->paging_cache)
{
$oModel->updateDocumentCount($obj->module_srl, $obj->category_srl, -1);
}
// Refresh full page cache for the current document, module, and/or index module.
if ($config->full_cache && $config->full_cache_document_action)
{
if (isset($config->full_cache_document_action['refresh_document']))
{
$oModel->deleteFullPageCache(0, $obj->document_srl);
}
if (isset($config->full_cache_document_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteFullPageCache($obj->module_srl, 0);
}
if (isset($config->full_cache_document_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if ($index_module_srl != $obj->module_srl || !isset($config->full_cache_document_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_document_action)
{
if (isset($config->search_cache_document_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteSearchResultCache($obj->module_srl, false);
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_document && $obj->module_srl)
{
$oModel->invalidateWidgetCache($obj->module_srl);
}
}
/**
* Trigger called at document.copyDocumentModule (after)
*/
public function triggerAfterCopyDocumentModule($obj)
{
$this->triggerAfterUpdateDocument($obj);
}
/**
* Trigger called at document.moveDocumentModule (after)
*/
public function triggerAfterMoveDocumentModule($obj)
{
$this->triggerAfterUpdateDocument($obj);
}
/**
* Trigger called at document.moveDocumentToTrash (after)
*/
public function triggerAfterMoveDocumentToTrash($obj)
{
$this->triggerAfterDeleteDocument($obj);
}
/**
* Trigger called at document.restoreTrash (after)
*/
public function triggerAfterRestoreDocumentFromTrash($obj)
{
$this->triggerAfterUpdateDocument($obj);
}
/**
* Trigger called at comment.insertComment (after)
*/
public function triggerAfterInsertComment($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Refresh full page cache for the current document, module, and/or index module.
if ($config->full_cache && $config->full_cache_comment_action)
{
$oModel = getModel('supercache');
if (isset($config->full_cache_comment_action['refresh_document']) && $obj->document_srl)
{
$oModel->deleteFullPageCache(0, $obj->document_srl);
}
if (isset($config->full_cache_comment_action['refresh_module']) && $obj->module_srl)
{
$oModel->deleteFullPageCache($obj->module_srl, 0);
}
if (isset($config->full_cache_comment_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if ($index_module_srl != $obj->module_srl || !isset($config->full_cache_comment_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_comment_action)
{
if (isset($config->search_cache_comment_action['refresh_module']) && $obj->module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->deleteSearchResultCache($obj->module_srl, true);
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_comment && $obj->module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->invalidateWidgetCache($obj->module_srl);
}
}
/**
* Trigger called at comment.updateComment (after)
*/
public function triggerAfterUpdateComment($obj)
{
// Get module configuration.
$config = $this->getConfig();
// Refresh full page cache for the current document, module, and/or index module.
if ($config->full_cache && $config->full_cache_comment_action)
{
$original = getModel('comment')->getComment($obj->comment_srl);
$document_srl = $obj->document_srl ?: $original->document_srl;
$module_srl = $obj->module_srl ?: $original->module_srl;
$oModel = getModel('supercache');
if (isset($config->full_cache_comment_action['refresh_document']) && $document_srl)
{
$oModel->deleteFullPageCache(0, $document_srl);
}
if (isset($config->full_cache_comment_action['refresh_module']) && $module_srl)
{
$oModel->deleteFullPageCache($module_srl, 0);
}
if (isset($config->full_cache_comment_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if ($index_module_srl != $module_srl || !isset($config->full_cache_comment_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_comment_action)
{
if (isset($config->search_cache_comment_action['refresh_module']))
{
$module_srl = isset($module_srl) ? $module_srl : ($obj->module_srl ?: getModel('comment')->getComment($obj->comment_srl)->module_srl);
if ($module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->deleteSearchResultCache($module_srl, true);
}
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_comment)
{
$module_srl = isset($module_srl) ? $module_srl : ($obj->module_srl ?: getModel('comment')->getComment($obj->comment_srl)->module_srl);
if ($module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->invalidateWidgetCache($module_srl);
}
}
}
/**
* Trigger called at comment.deleteComment (after)
*/
public function triggerAfterDeleteComment($obj)
{
// Get module configuration.
$config = $this->getConfig();
$module_srl = $obj->module_srl ?: (method_exists($obj, 'get') ? $obj->get('module_srl'): 0);
// Refresh full page cache for the current document, module, and/or index module.
if ($config->full_cache && $config->full_cache_comment_action)
{
$oModel = getModel('supercache');
if (isset($config->full_cache_comment_action['refresh_document']) && $obj->document_srl)
{
$oModel->deleteFullPageCache(0, $obj->document_srl);
}
if (isset($config->full_cache_comment_action['refresh_module']) && $module_srl)
{
$oModel->deleteFullPageCache($module_srl, 0);
}
if (isset($config->full_cache_comment_action['refresh_index']))
{
$index_module_srl = Context::get('site_module_info')->index_module_srl ?: 0;
if ($index_module_srl != $module_srl || !isset($config->full_cache_comment_action['refresh_module']))
{
$oModel->deleteFullPageCache($index_module_srl, 0);
}
}
}
// Refresh search result cache for the current module.
if ($config->search_cache && $config->search_cache_comment_action)
{
if (isset($config->search_cache_comment_action['refresh_module']) && $module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->deleteSearchResultCache($module_srl, true);
}
}
// Refresh widgets referencing the current module.
if ($config->widget_cache_autoinvalidate_comment && $module_srl)
{
$oModel = isset($oModel) ? $oModel : getModel('supercache');
$oModel->invalidateWidgetCache($module_srl);
}
}
/**
* Trigger called at moduleHandler.proc (after)
*/
public function triggerAfterModuleHandlerProc($obj)
{
// Capture the HTTP status code of the current request.
if (!is_object($obj) || !method_exists($obj, 'getHttpStatusCode'))
{
$this->_cacheHttpStatusCode = 404;
}
elseif (($status_code = $obj->getHttpStatusCode()) > 200)
{
$this->_cacheHttpStatusCode = intval($status_code);
}
// Change gzip setting.
if (is_object($obj) && $gzip = $this->getConfig()->use_gzip)
{
if ($gzip !== 'none' && $gzip !== 'default')
{
if (defined('RX_VERSION') && function_exists('config'))
{
config('view.use_gzip', true);
}
elseif (!defined('__OB_GZHANDLER_ENABLE__'))
{
define('__OB_GZHANDLER_ENABLE__', 1);
}
}
switch ($gzip)
{
case 'except_robots':
$obj->gzhandler_enable = isCrawler() ? false : true;
break;
case 'except_naver':
$obj->gzhandler_enable = preg_match('/(yeti|naver)/i', $_SERVER['HTTP_USER_AGENT']) ? false : true;
break;
case 'none':
$obj->gzhandler_enable = false;
break;
case 'always':
default:
break;
}
}
}
/**
* Trigger called at display (before)
*/
public function triggerBeforeDisplay(&$content)
{
// Return if widgets should not be cached for this request.
$config = $this->getConfig();
if (!$config->widget_cache || !$config->widget_cache_duration)
{
return;
}
if (Context::getResponseMethod() !== 'HTML' || preg_match('/^disp(?:Layout|Page)[A-Z]/', Context::get('act')))
{
return;
}
// Return if widget compilation is in "Javascript Mode" for any reason.
$oWidgetController = getController('widget');
if ($oWidgetController->javascript_mode || $oWidgetController->layout_javascript_mode)
{
return;
}
// Return if SimpleXML is not available.
if (!function_exists('simplexml_load_string'))
{
return;
}
// Convert widgets into HTML output using Super Cache's own widget cache.
$content = preg_replace_callback('/<img\b(?:[^>]*?)\bwidget="(?:[^>]*?)>/i', array($this, 'procWidgetCache'), $content);
}
/**
* Trigger called at display (after)
*/
public function triggerAfterDisplay($content)
{
// Store the output of the current request in the full-page cache.
if ($this->_cacheCurrentRequest)
{
// Do not store redirects.
if ($this->_cacheHttpStatusCode >= 300 && $this->_cacheHttpStatusCode <= 399)
{
return;
}
// Do not store error codes unless include_404 is true.
if ($this->_cacheHttpStatusCode !== 200 && !$this->getConfig()->full_cache_include_404)
{
return;
}
// Collect extra data.
if ($this->_cacheCurrentRequest[1] && ($oDocument = Context::get('oDocument')) && ($oDocument->document_srl == $this->_cacheCurrentRequest[1]))
{
$extra_data = array(
'member_srl' => abs(intval($oDocument->get('member_srl'))),
'view_count' => intval($oDocument->get('readed_count')),
);
}
else
{
$extra_data = array();
}
// Set the full-page cache.
getModel('supercache')->setFullPageCache(
$this->_cacheCurrentRequest[0],
$this->_cacheCurrentRequest[1],
$this->_cacheCurrentRequest[2],
$this->_cacheCurrentRequest[3],
$content,
$extra_data,
$this->_cacheHttpStatusCode,
microtime(true) - $this->_cacheStartTimestamp
);
}
}
/**
* Check the full page cache for the current request,
* and terminate the request with a cached response if available.
*
* @param object $obj
* @param object $config
* @return void
*/
public function checkFullPageCache($obj, $config)
{
// Abort if not an HTML GET request.
if (Context::getRequestMethod() !== 'GET' || PHP_SAPI === 'cli')
{
return;
}
// Abort if logged in.
$logged_info = Context::get('logged_info');
if ($logged_info && $logged_info->member_srl)
{
return;
}
// Abort if the visitor has an excluded cookie.
if ($config->full_cache_exclude_cookies)
{
foreach ($config->full_cache_exclude_cookies as $key => $value)
{
if (isset($_COOKIE[$key]) && strlen($_COOKIE[$key]))
{
return;
}
}
}
// Abort if the current user agent type is excluded.
$is_crawler = isCrawler();
if ($is_crawler && !isset($config->full_cache['robot']))
{
return;
}
$device_type = $this->getDeviceType();
if ($device_type === 'pc' && !isset($config->full_cache['pc']))
{
return;
}
if ($device_type[1] === 'o' && !isset($config->full_cache['mobile']))
{
return;
}
if ($device_type[1] === 'p' && !isset($config->full_cache['pushapp']))
{
return;
}
// Abort if the current domain does not match the default domain.
$site_module_info = Context::get('site_module_info');
if (!$this->_defaultUrlChecked)
{
$current_domain = preg_replace('/:\d+$/', '', $_SERVER['HTTP_HOST']);
$default_domain = parse_url(Context::getDefaultUrl(), PHP_URL_HOST);
if ($current_domain !== $default_domain && $current_domain !== parse_url($site_module_info->domain, PHP_URL_HOST))
{
return;
}
}
// Collect more information about the current request.
$mid = $obj->mid ?: Context::get('mid');
$act = Context::get('act');
$document_srl = Context::get('document_srl');
$is_secure = (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] && $_SERVER['HTTPS'] !== 'off');
// Abort if the current act is excluded.
if (isset($config->full_cache_exclude_acts[$act]))
{
return;
}
// Abort if the current module is excluded.
if (!$obj->mid && !$obj->module && !$obj->module_srl)
{
$module_srl = $site_module_info->module_srl;
}
elseif ($obj->module_srl)
{
$module_srl = $obj->module_srl;
}
elseif ($mid)
{
$module_info = getModel('module')->getModuleInfoByMid($mid, intval($site_module_info->site_srl) ?: 0);
$module_srl = $module_info ? $module_info->module_srl : 0;
}
else
{
$module_srl = 0;
}
$module_srl = intval($module_srl);
if (isset($config->full_cache_exclude_modules[$module_srl]))
{
return;
}
// Determine the page type.
if ($act)
{
$page_type = 'other';
}
elseif ($document_srl)
{
$page_type = 'document';
}
elseif ($module_srl)
{
$page_type = 'module';
}
else
{
$page_type = 'url';
}
// Abort if the current page type is not selected for caching.
if (!isset($config->full_cache_type[$page_type]) && !($page_type === 'url' && $config->full_cache_include_404))
{
return;
}
// Compile the user agent type.
$user_agent_type = $device_type . ($is_secure ? '_secure' : '') . '_' . Context::getLangType();
// Remove unnecessary request variables.
$request_vars = Context::getRequestVars();
if (is_object($request_vars))
{
$request_vars = get_object_vars($request_vars);
}
unset($request_vars['mid'], $request_vars['module'], $request_vars['module_srl'], $request_vars['document_srl'], $request_vars['m']);
// Add separate cookies to request variables.
if ($config->full_cache_separate_cookies)
{
foreach ($config->full_cache_separate_cookies as $key => $value)
{
if (isset($_COOKIE[$key]) && strlen($_COOKIE[$key]))
{
$request_vars['_COOKIE'][$key] = strval($_COOKIE[$key]);
}
}
}
// Add URL to request variables.
if ($page_type === 'url')
{
$request_vars['_REQUEST_URI'] = $_SERVER['REQUEST_URI'];
$page_type = 'other';
}
// Check the cache.
$oModel = getModel('supercache');
switch ($page_type)
{
case 'module':
$this->_cacheCurrentRequest = array($module_srl, 0, $user_agent_type, $request_vars);
$cache = $oModel->getFullPageCache($module_srl, 0, $user_agent_type, $request_vars);
break;
case 'document':
$this->_cacheCurrentRequest = array($module_srl, $document_srl, $user_agent_type, $request_vars);
$cache = $oModel->getFullPageCache($module_srl, $document_srl, $user_agent_type, $request_vars);
break;
case 'other':
$this->_cacheCurrentRequest = array(0, 0, $user_agent_type, $request_vars);
$cache = $oModel->getFullPageCache(0, 0, $user_agent_type, $request_vars);
break;
}
// If cached content is available, display it and exit.
if ($cache)
{
// Find out how much time is left until this content expires.
$expires = max(0, $cache['expires'] - time());
// Print X-SuperCache and Cache-Control headers.
header('X-SuperCache: HIT, dev=' . $device_type . ', type=' . $page_type . ', expires=' . $expires);
if ($this->useCacheControlHeaders($config))
{
$this->printCacheControlHeaders($expires, $config->full_cache_stampede_protection ? 10 : 0);
}
// Increment the view count if required.
if ($page_type === 'document' && $config->full_cache_incr_view_count && isset($cache['extra_data']['view_count']))
{
if (!isset($_SESSION['readed_document'][$document_srl]))
{
$oModel->updateDocumentViewCount($document_srl, $cache['extra_data']);
$_SESSION['readed_document'][$document_srl] = true;
}
}
// Print the content or a 304 response.
if ($_SERVER['HTTP_IF_MODIFIED_SINCE'] && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $cache['cached'])
{
$this->printHttpStatusCodeHeader(304);
}
else
{
if ($cache['status'] && $cache['status'] !== 200)
{
$this->printHttpStatusCodeHeader($cache['status']);
}
header("Content-Type: text/html; charset=UTF-8");
echo $cache['content'];
echo "\n" . '<!--' . "\n";
echo ' Serving ' . strlen($cache['content']) . ' bytes from full page cache' . "\n";
echo ' Generated at ' . date('Y-m-d H:i:s P', $cache['cached']) . ' in ' . $cache['elapsed'] . "\n";
echo ' Cache expires in ' . $expires . ' seconds' . "\n";
echo '-->' . "\n";
}
Context::close();
exit;
}
// Otherwise, prepare headers to cache the current request.
header('X-SuperCache: MISS, dev=' . $device_type . ', type=' . $page_type . ', expires=' . $config->full_cache_duration);
if ($this->useCacheControlHeaders($config))
{
$this->printCacheControlHeaders($config->full_cache_duration, $config->full_cache_stampede_protection ? 10 : 0);
}
$this->_cacheStartTimestamp = microtime(true);
}
/**
* Print HTTP status code header.
*
* @param int $http_status_code
* @return void
*/
public function printHttpStatusCodeHeader($http_status_code)
{
switch ($http_status_code)
{
case 301: return header('HTTP/1.1 301 Moved Permanently');
case 302: return header('HTTP/1.1 302 Found');
case 304: return header('HTTP/1.1 304 Not Modified');
case 400: return header('HTTP/1.1 400 Bad Request');
case 403: return header('HTTP/1.1 403 Forbidden');
case 404: return header('HTTP/1.1 404 Not Found');
case 500: return header('HTTP/1.1 500 Internal Server Error');
case 503: return header('HTTP/1.1 503 Service Unavailable');
default: return function_exists('http_response_code') ? http_response_code($http_status_code) : header(sprintf('HTTP/1.1 %d Internal Server Error', $http_status_code));
}
}
/**
* Print cache control headers.
*
* @param int $expires
* @param int $scatter
* @return void
*/
public function printCacheControlHeaders($expires, $scatter)
{
$scatter = intval($expires * ($scatter / 100));
$expires = intval($expires - mt_rand(0, $scatter));
header('Cache-Control: max-age=' . $expires);
header('Expires: ' . gmdate('D, d M Y H:i:s', time() + $expires) . ' GMT');
header_remove('Pragma');
}
/**
* Check if cache control headers are enabled for the current request.
*
* @param object $config
* @return bool
*/
public function useCacheControlHeaders($config)
{
if ($config->full_cache_use_headers)
{
return $config->full_cache_use_headers_proxy_too ? true : !(isset($_SERVER['HTTP_X_FORWARDED_FOR']) && $_SERVER['HTTP_X_FORWARDED_FOR']);
}
else
{
return false;
}
}
/**
* If this is a document view request without a page number,
* fill in the page number to prevent the getDocumentListPage query.
*
* @param object $obj
* @param object $config
* @return void
*/
public function fillPageVariable($obj, $config)
{
// Only work if there is a document_srl without a page variable and a suitable referer header.
if ($obj->mid && Context::get('document_srl') && Context::get('act') && !Context::get('module') && !Context::get('page') && ($referer = isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : false))
{
// Only guess the page number from the same module in the same site.