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ezzoom.php
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ezzoom.php
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<?php
/**
* EZAPPS Zoom Handler
*
* @category Ezapps
* @package Ezapps_Zoom
* @author Ezra Morse (http://www.ezapps.ca)
* @license: EPL 1.0
*/
class Ezapps_Zoom_Handler
{
private static $instance;
private static $ZOOM_ROOT;
private static $SERVER;
private static $REQUEST;
private static $AGENT;
private static $GET_POSTFIX;
private static $base_uri;
private static $_start;
const DS = DIRECTORY_SEPARATOR;
private static $ZOOM_INDEX = 'ZOOM_INDEX';
private static $GET_STEM = 'zoom_';
private static $APC_KEY = 'ZOOM';
private static $ZOOM_CLIENT_DATA = 'ZOOM_CLIENT_MATCH_DATA';
private static $HOLE_START = '<span id="hole-';
private static $HOLE_END_PRE = '-pre"></span>';
private static $HOLE_END_POST = '-post"></span>';
private static $TAG_START = '<span id="ezzoom-ajax-footer-pre"></span>';
private static $TAG_END = '<span id="ezzoom-ajax-footer-post"></span>';
private static $TAG_START_CURRENCY = '<span id="ezzoom-ajax-footer-currency-pre"></span>';
private static $TAG_END_CURRENCY = '<span id="ezzoom-ajax-footer-currency-post"></span>';
private static $TAG_PAGE = '{{ezzoom-page-id}}';
private static $TAG_FILE = '{{ezzoom-file}}';
private static $GET_URI_MARK = '/zget/';
private static $STORE = '';
private static $DEFAULT_FILL = array();
private static $_no_client_data_found = false;
function __construct() {
self::$ZOOM_ROOT = 'var' . DIRECTORY_SEPARATOR . 'zoom';
self::$SERVER = $_SERVER["SERVER_NAME"];
self::$REQUEST = $_SERVER["REQUEST_URI"];
self::$AGENT = (in_array("HTTP_USER_AGENT", $_SERVER) ? $_SERVER["HTTP_USER_AGENT"] : '');
self::$_start = microtime(true);
self::$GET_POSTFIX = str_replace('/', self::DS, self::$GET_URI_MARK);
self::$STORE = (array_key_exists('store', $_COOKIE) ? $_COOKIE['store'] :
(array_key_exists('MAGE_RUN_CODE', $_SERVER) ? $_SERVER['MAGE_RUN_CODE'] : ''));
if (self::$STORE == '')
self::$STORE = 'default';
$url = parse_url(self::$REQUEST);
$test = explode("/", $url['path']);
if ($test[(count($test) - 1)] == "")
self::$base_uri = str_replace('/', self::DS, $url['path'] . self::$ZOOM_INDEX);
else if (!strstr($test[(count($test)-1)], '.'))
self::$base_uri = str_replace('/', self::DS, $url['path'] . '/' . self::$ZOOM_INDEX);
else
self::$base_uri = str_replace('/', self::DS, $url['path']);
// Customize for stores if default fill is desired
/*self::$DEFAULT_FILL['default']['links'] = '<ul class="links">' .
'<li class="first"><a href="{{secure_url}}customer/account/" title="My Account">My Account</a></li>' .
' <li><a href="{{secure_url}}wishlist/" title="My Wishlist">My Wishlist</a></li>' .
' <li><a href="{{unsecure_url}}checkout/cart/" title="My Cart" class="top-link-cart">My Cart</a></li>' .
' <li><a href="{{secure_url}}checkout/" title="Checkout" class="top-link-checkout">Checkout</a></li>' .
' <li class=" last"><a href="{{secure_url}}customer/account/login/" title="Log In">Log In</a></li>' .
'</ul>';
self::$DEFAULT_FILL['default']['cart'] = '<a href="{{unsecure_url}}checkout/cart/">0 items in your cart</a>';*/
}
public function getVars() {
return array(
'ZOOM_CLIENT_MATCH_DATA' => self::$ZOOM_CLIENT_DATA,
'ZOOM_ROOT' => self::$ZOOM_ROOT,
'SERVER' => self::$SERVER,
'REQUEST' => self::$REQUEST,
'AGENT' => self::$AGENT,
'APC_KEY' => self::$APC_KEY,
'base_uri' => self::$base_uri,
'ZOOM_INDEX' => self::$ZOOM_INDEX,
'HOLE_START' => self::$HOLE_START,
'HOLE_END_PRE' => self::$HOLE_END_PRE,
'HOLE_END_POST' => self::$HOLE_END_POST,
'GET_STEM' => self::$GET_STEM,
'TAG_START' => self::$TAG_START,
'TAG_END' => self::$TAG_END,
'TAG_START_CURRENCY' => self::$TAG_START_CURRENCY,
'TAG_END_CURRENCY' => self::$TAG_END_CURRENCY,
'TAG_PAGE' => self::$TAG_PAGE,
'TAG_FILE' => self::$TAG_FILE,
'GET_POSTFIX' => self::$GET_POSTFIX,
'GET_URI_MARK' => self::$GET_URI_MARK,
'STORE' => self::$STORE,
'DEFAULT_FILL' => self::$DEFAULT_FILL,
);
}
public static function getInstance() {
if(!self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
public static function tryRetrieveCacheFile() {
$test_for_rewrites = explode(self::$GET_URI_MARK, self::$base_uri);
if (array_key_exists(1, $test_for_rewrites)) {
self::$base_uri = $test_for_rewrites[0];
$_SERVER["REQUEST_URI"] = $test_for_rewrites[0];
$args = explode("/", $test_for_rewrites[1]);
for ($i = 0; $i < count($args); $i=$i+2)
$_GET[$args[$i]] = $args[$i+1];
}
$client_matches = null;
$zoom_package = '';
$zoom_template = '';
$zoom_theme = '';
$apc_grab = true;
if (function_exists('apc_fetch')) {
$apckey = self::$APC_KEY . self::DS . self::$STORE . self::DS . self::$ZOOM_CLIENT_DATA;
if (apc_exists($apckey))
$client_matches = apc_fetch($apckey);
if (is_null($client_matches))
$apc_grab = false;
}
if (is_null($client_matches)) {
$zoom_client_file = self::$ZOOM_ROOT . self::DS . self::$STORE . self::DS . self::$ZOOM_CLIENT_DATA;
if (file_exists($zoom_client_file)) {
$client_matches = json_decode(file_get_contents($zoom_client_file), true);
if ($apc_grab != true)
apc_add($apckey, $client_matches);
}
}
if ($client_matches) {
$zoom_package = self::checkClient($client_matches['package']);
$zoom_template = self::checkClient($client_matches['template']);
$zoom_theme = self::checkClient($client_matches['theme']);
if ($zoom_package != '' || $zoom_template != '' || $zoom_theme != '') {
$file_to_check = self::$ZOOM_ROOT . self::DS . self::$STORE .
self::DS . ($zoom_package != '' ? $zoom_package : 'default') .
self::DS . ($zoom_template != '' ? $zoom_template : 'default') .
self::DS . ($zoom_theme != '' ? $zoom_theme : 'default') .
self::$base_uri;
} else $file_to_check = self::$ZOOM_ROOT . self::DS . self::$STORE . self::$base_uri;
} else {
self::$_no_client_data_found = true;
return;
}
$params = array();
$files = array();
list($page_name) = array_keys($client_matches['controls']['page']);
$p_track = 0;
foreach ($client_matches['controls']['control'] as $key => $value)
if (array_key_exists($key, $_GET))
$params[$key] = $_GET[$key];
else if (array_key_exists(self::$GET_STEM . $key, $_COOKIE))
$params[$key] = $_COOKIE[self::$GET_STEM . $key];
if (count($params) > 0) {
foreach ($client_matches['controls']['filters'] as $key => $value)
if (array_key_exists($key, $_GET))
$params[$key] = urlencode($_GET[$key]);
if (array_key_exists($page_name, $_GET)) {
$page = array($page_name => $_GET[$page_name]);
$files[] = self::paramsToFile(array_merge($page, $params), $file_to_check);
} else $files[] = self::paramsToFile(array_merge(array($page_name => 1), $params), $file_to_check);
} else if (array_key_exists($page_name, $_GET))
$files[] = self::paramsToFile(array($page_name => $_GET[$page_name]), $file_to_check);
else {
$files[] = self::paramsToFile(array($page_name => 1), $file_to_check);
}
$page = false;
$files[] = $file_to_check;
if (preg_match('/MSIE [1-6]/i',self::$AGENT)) $gzip = false; else $gzip = true;
foreach ($files as $attempt) {
if ($gzip && file_exists($attempt . ".gz"))
$page = file_get_contents($attempt . ".gz");
else if (file_exists($attempt))
$page = file_get_contents($attempt);
if ($page != false)
break;
}
if ($page != false) {
if (bin2hex(substr($page,0,2)) == '1f8b' ) {
if(count(ob_list_handlers()) > 0)
ob_end_clean();
header("X-Compression: gzip");
header("Content-Encoding: gzip");
}
echo $page;
exit();
}
return;
}
private function paramsToFile($params, $uri) {
if (count($params) > 0) {
$uri .= self::$GET_POSTFIX;
foreach ($params as $key => $value) {
$uri .= self::DS . $key;
$uri .= self::DS . $value;
}
$uri .= self::DS . self::$ZOOM_INDEX;
return str_replace(self::DS . self::DS, self::DS, $uri);
} else return array();
}
public static function punchHoles($buffer) {
if (class_exists('Mage')) {
$modules = (array)Mage::getConfig()->getNode('modules')->children();
if (array_key_exists('Ezapps_Zoom', $modules) && $modules['Ezapps_Zoom']->is('active') ) {
if (self::$_no_client_data_found != false) {
Mage::helper('ezzoom')->generateClientRewrites();
} else if (Mage::helper('ezzoom')->matchedPage() == true) {
$start = self::$TAG_START_CURRENCY;
$end = self::$TAG_END_CURRENCY;
$starta = self::$TAG_START;
$enda = self::$TAG_END;
$search = array("#{$starta}#sU", "#{$enda}#sU", "#{$start}(.*){$end}#sU");
$replace = array('', '', '');
$punched_file = Mage::helper('ezzoom')->punchHoles(preg_replace($search, $replace, $buffer));
$id = Mage::helper('ezzoom')->saveFile(self::$base_uri, $punched_file);
}
Mage::helper('ezzoom')->setRenderTime(microtime(true) - self::$_start);
$start = self::$TAG_START;
$end = self::$TAG_END;
return preg_replace("#$start(.*)$end#sU", '', Mage::helper('ezzoom')->renderHeaderDebug($buffer));
}
}
return $buffer;
}
public static function startBuffer() {
ob_start(array(get_class(self::getInstance()), 'punchHoles'));
}
private static function checkClient($regex) {
if (!$regex)
return '';
$rules = @unserialize($regex);
if (empty($rules))
return '';
foreach ($rules as $rule) {
$regexp = '#' . trim($rule['regexp'], '#') . '#';
if (@preg_match($regexp, self::$AGENT))
return $rule['value'];
}
}
}
$zoom_controller = Ezapps_Zoom_Handler::getInstance();
if (!(array_key_exists('___store', $_GET) && array_key_exists('___from_store', $_GET))) {
if (!(array_key_exists('isAjax', $_GET) || array_key_exists('ajax', $_GET) || array_key_exists('isAjax', $_POST) || array_key_exists('ajax', $_POST))) {
$zoom_controller->tryRetrieveCacheFile();
$zoom_controller->startBuffer();
}
}
?>