sfWebBrowser cached version

gistfile1.aw

<?php
/**
 * Extended version of sfWebBrowser to provide caching functionality
 */
class tlCachedBrowser extends sfWebBrowser 
{

  protected $cache_expiration = 86400; // 1 day default cache

  /**
   * return current cache expiration in seconds
   *
   * @return integer
   */
  public function getCacheExpiration() 
  {
    return $this->cache_expiration;
  }

  /**
   * set cache expiration
   *
   * @param integer $seconds
   * @return integer
   */
  public function setCacheExpiration($seconds) 
  {
    $this->cache_expiration = $seconds;
    return $this->cache_expiration;
  }

  /**
   * cached get
   *
   * @param string The request uri
   * @param array  The request parameters (associative array)
   * @param array  The request headers (associative array)
   *
   * @return sfWebBrowser The current browser object
   */
  public function get($uri, $parameters = array(), $headers = array())
  {
  	
  	$dir = sfConfig::get('sf_cache_dir').'/tlCachedBrowser';
  	
  	$sfFileCache = new sfFileCache(array('cache_dir' => $dir));

    $hashed_uri = md5($uri.'?'.implode(',', $parameters));

    if($sfFileCache->has($hashed_uri, 'tlCachedBrowser') && (time() < ($this->cache_expiration + $sfFileCache->getLastModified($hashed_uri, 'tlCachedBrowser')))) 
    {
      sfContext::getInstance()->getLogger()->debug('{tlCachedBrowser} (CACHED): '.$uri.'?'.http_build_query($parameters, null, '&'));

      $this->setResponseCode(200);
      $this->setResponseHeaders();
      $this->setResponseText($sfFileCache->get($hashed_uri, 'tlCachedBrowser'));

      return $this;
    } 
    else // set the cache
    {
      $ret = parent::get($uri, $parameters, $headers);

      sfContext::getInstance()->getLogger()->debug('{tlCachedBrowser} (NOT CACHED): '.$uri.'?'.http_build_query($parameters, null, '&'));

      $sfFileCache->set($hashed_uri, $this->getResponseText());

      return $ret;
    }
  }
}