Skip to content

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
Fetching contributors…

Cannot retrieve contributors at this time

332 lines (300 sloc) 9.515 kb
<?php
/**
* CacheHelper helps create full page view caching.
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2012, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package Cake.View.Helper
* @since CakePHP(tm) v 1.0.0.2277
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
App::uses('AppHelper', 'View/Helper');
/**
* CacheHelper helps create full page view caching.
*
* When using CacheHelper you don't call any of its methods, they are all automatically
* called by View, and use the $cacheAction settings set in the controller.
*
* @package Cake.View.Helper
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/cache.html
*/
class CacheHelper extends AppHelper {
/**
* Array of strings replaced in cached views.
* The strings are found between `<!--nocache--><!--/nocache-->` in views
*
* @var array
*/
protected $_replace = array();
/**
* Array of string that are replace with there var replace above.
* The strings are any content inside `<!--nocache--><!--/nocache-->` and includes the tags in views
*
* @var array
*/
protected $_match = array();
/**
* Counter used for counting nocache section tags.
*
* @var integer
*/
protected $_counter = 0;
/**
* Is CacheHelper enabled? should files + output be parsed.
*
* @return boolean
*/
protected function _enabled() {
return (($this->_View->cacheAction != false)) && (Configure::read('Cache.check') === true);
}
/**
* Parses the view file and stores content for cache file building.
*
* @param string $viewFile
* @return void
*/
public function afterRenderFile($viewFile, $output) {
if ($this->_enabled()) {
return $this->_parseContent($viewFile, $output);
}
}
/**
* Parses the layout file and stores content for cache file building.
*
* @param string $layoutFile
* @return void
*/
public function afterLayout($layoutFile) {
if ($this->_enabled()) {
$this->_View->output = $this->cache($layoutFile, $this->_View->output);
}
$this->_View->output = preg_replace('/<!--\/?nocache-->/', '', $this->_View->output);
}
/**
* Parse a file + output. Matches nocache tags between the current output and the current file
* stores a reference of the file, so the generated can be swapped back with the file contents when
* writing the cache file.
*
* @param string $file The filename to process.
* @param string $out The output for the file.
* @return string Updated content.
*/
protected function _parseContent($file, $out) {
$out = preg_replace_callback('/<!--nocache-->/', array($this, '_replaceSection'), $out);
$this->_parseFile($file, $out);
return $out;
}
/**
* Main method used to cache a view
*
* @param string $file File to cache
* @param string $out output to cache
* @return string view ouput
* @link http://book.cakephp.org/2.0/en/core-libraries/helpers/cache.html
*/
public function cache($file, $out) {
$cacheTime = 0;
$useCallbacks = false;
$cacheAction = $this->_View->cacheAction;
if (is_array($cacheAction)) {
$keys = array_keys($cacheAction);
$index = null;
foreach ($keys as $action) {
if ($action == $this->request->params['action']) {
$index = $action;
break;
}
}
if (!isset($index) && $this->request->params['action'] == 'index') {
$index = 'index';
}
$options = $cacheAction;
if (isset($cacheAction[$index])) {
if (is_array($cacheAction[$index])) {
$options = array_merge(array('duration' => 0, 'callbacks' => false), $cacheAction[$index]);
} else {
$cacheTime = $cacheAction[$index];
}
}
if (isset($options['duration'])) {
$cacheTime = $options['duration'];
}
if (isset($options['callbacks'])) {
$useCallbacks = $options['callbacks'];
}
} else {
$cacheTime = $cacheAction;
}
if ($cacheTime != '' && $cacheTime > 0) {
$cached = $this->_parseOutput($out);
try {
$this->_writeFile($cached, $cacheTime, $useCallbacks);
} catch (Exception $e) {
$message = __d(
'cake_dev',
'Unable to write view cache file: "%s" for "%s"',
$e->getMessage(),
$this->request->here
);
$this->log($message, 'error');
}
$out = $this->_stripTags($out);
}
return $out;
}
/**
* Parse file searching for no cache tags
*
* @param string $file The filename that needs to be parsed.
* @param string $cache The cached content
* @return void
*/
protected function _parseFile($file, $cache) {
if (is_file($file)) {
$file = file_get_contents($file);
} elseif ($file = fileExistsInPath($file)) {
$file = file_get_contents($file);
}
preg_match_all('/(<!--nocache:\d{3}-->(?<=<!--nocache:\d{3}-->)[\\s\\S]*?(?=<!--\/nocache-->)<!--\/nocache-->)/i', $cache, $outputResult, PREG_PATTERN_ORDER);
preg_match_all('/(?<=<!--nocache-->)([\\s\\S]*?)(?=<!--\/nocache-->)/i', $file, $fileResult, PREG_PATTERN_ORDER);
$fileResult = $fileResult[0];
$outputResult = $outputResult[0];
if (!empty($this->_replace)) {
foreach ($outputResult as $i => $element) {
$index = array_search($element, $this->_match);
if ($index !== false) {
unset($outputResult[$i]);
}
}
$outputResult = array_values($outputResult);
}
if (!empty($fileResult)) {
$i = 0;
foreach ($fileResult as $cacheBlock) {
if (isset($outputResult[$i])) {
$this->_replace[] = $cacheBlock;
$this->_match[] = $outputResult[$i];
}
$i++;
}
}
}
/**
* Munges the output from a view with cache tags, and numbers the sections.
* This helps solve issues with empty/duplicate content.
*
* @return string The content with cake:nocache tags replaced.
*/
protected function _replaceSection() {
$this->_counter += 1;
return sprintf('<!--nocache:%03d-->', $this->_counter);
}
/**
* Strip cake:nocache tags from a string. Since View::render()
* only removes un-numbered nocache tags, remove all the numbered ones.
* This is the complement to _replaceSection.
*
* @param string $content String to remove tags from.
* @return string String with tags removed.
*/
protected function _stripTags($content) {
return preg_replace('#<!--/?nocache(\:\d{3})?-->#', '', $content);
}
/**
* Parse the output and replace cache tags
*
* @param string $cache Output to replace content in.
* @return string with all replacements made to <!--nocache--><!--nocache-->
*/
protected function _parseOutput($cache) {
$count = 0;
if (!empty($this->_match)) {
foreach ($this->_match as $found) {
$original = $cache;
$length = strlen($found);
$position = 0;
for ($i = 1; $i <= 1; $i++) {
$position = strpos($cache, $found, $position);
if ($position !== false) {
$cache = substr($original, 0, $position);
$cache .= $this->_replace[$count];
$cache .= substr($original, $position + $length);
} else {
break;
}
}
$count++;
}
return $cache;
}
return $cache;
}
/**
* Write a cached version of the file
*
* @param string $content view content to write to a cache file.
* @param string $timestamp Duration to set for cache file.
* @param boolean $useCallbacks
* @return boolean success of caching view.
*/
protected function _writeFile($content, $timestamp, $useCallbacks = false) {
$now = time();
if (is_numeric($timestamp)) {
$cacheTime = $now + $timestamp;
} else {
$cacheTime = strtotime($timestamp, $now);
}
$path = $this->request->here();
if ($path == '/') {
$path = 'home';
}
$cache = strtolower(Inflector::slug($path));
if (empty($cache)) {
return;
}
$cache = $cache . '.php';
$file = '<!--cachetime:' . $cacheTime . '--><?php';
if (empty($this->_View->plugin)) {
$file .= "
App::uses('{$this->_View->name}Controller', 'Controller');
";
} else {
$file .= "
App::uses('{$this->_View->plugin}AppController', '{$this->_View->plugin}.Controller');
App::uses('{$this->_View->name}Controller', '{$this->_View->plugin}.Controller');
";
}
$file .= '
$request = unserialize(base64_decode(\'' . base64_encode(serialize($this->request)) . '\'));
$response = new CakeResponse();
$controller = new ' . $this->_View->name . 'Controller($request, $response);
$controller->plugin = $this->plugin = \'' . $this->_View->plugin . '\';
$controller->helpers = $this->helpers = unserialize(base64_decode(\'' . base64_encode(serialize($this->_View->helpers)) . '\'));
$controller->layout = $this->layout = \'' . $this->_View->layout . '\';
$controller->theme = $this->theme = \'' . $this->_View->theme . '\';
$controller->viewVars = unserialize(base64_decode(\'' . base64_encode(serialize($this->_View->viewVars)) . '\'));
Router::setRequestInfo($controller->request);
$this->request = $request;';
if ($useCallbacks == true) {
$file .= '
$controller->constructClasses();
$controller->startupProcess();';
}
$file .= '
$this->viewVars = $controller->viewVars;
$this->loadHelpers();
extract($this->viewVars, EXTR_SKIP);
?>';
$content = preg_replace("/(<\\?xml)/", "<?php echo '$1'; ?>", $content);
$file .= $content;
return cache('views' . DS . $cache, $file, $timestamp);
}
}
Jump to Line
Something went wrong with that request. Please try again.