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<?php
/**
* Plugin Helper File
*
* @package CDN for Joomla!
* @version 3.4.0
*
* @author Peter van Westen <peter@nonumber.nl>
* @link http://www.nonumber.nl
* @copyright Copyright © 2014 NoNumber All Rights Reserved
* @license http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
*/
defined('_JEXEC') or die;
require_once JPATH_PLUGINS . '/system/nnframework/helpers/functions.php';
require_once JPATH_PLUGINS . '/system/nnframework/helpers/protect.php';
nnFrameworkFunctions::loadLanguage('plg_system_cdnforjoomla');
/**
* Plugin that replaces media urls with CDN urls
*/
class plgSystemCDNforJoomlaHelper
{
var $params = null;
var $pass = false;
public function __construct(&$params)
{
$this->params = $params;
$hascdn = preg_replace(array('#^.*\://#', '#/$#'), '', $this->params->cdn);
// return if cdn field has no value
if (!$hascdn)
{
return;
}
$this->params->tag_attribs = $this->getSearchTagAttributes();
$this->initSetList();
if (empty($this->params->sets))
{
return;
}
$this->pass = true;
}
function initSetList()
{
$this->params->sets = array();
$nr_of_sets = 1;
for ($i = 1; $i <= $nr_of_sets; $i++)
{
$this->params->sets[] = $this->initSetParams($i);
}
$this->removeEmptySets();
}
function removeEmptySets()
{
foreach ($this->params->sets as $i => $set)
{
if (!empty($set) && !empty($set->searches))
{
continue;
}
unset($this->params->sets[$i]);
}
}
function initSetParams($setid = 1)
{
$setid = ($setid <= 1) ? '' : '_' . (int) $setid;
if ($setid && (!isset($this->params->{'use_extra' . $setid}) || !$this->params->{'use_extra' . $setid}))
{
return false;
}
$filetypes = str_replace('-', ',', implode(',', $this->params->{'filetypes' . $setid}));
$filetypes = explode(',', $filetypes);
$extratypes = preg_replace('#\s#', '', $this->params->{'extratypes' . $setid});
if ($extratypes)
{
$filetypes = array_merge($filetypes, explode(',', $extratypes));
}
$filetypes = array_unique(array_diff($filetypes, array('', 'x')));
if (empty($filetypes))
{
return false;
}
$params = new stdClass;
$params->filetypes = $filetypes;
$params->enable_in_scripts = $this->params->{'enable_in_scripts' . $setid};
$params->protocol = 'http://';
$params->cdn = preg_replace('#/$#', '', $this->params->{'cdn' . $setid});
$params->ignorefiles = explode(',', str_replace(array('\n', ' '), array(',', ''), $this->params->{'ignorefiles' . $setid}));
$root = preg_replace(array('#^/#', '#/$#'), '', $this->params->{'root' . $setid}) . '/';
$params->root = preg_replace('#^/#', '', $root);
$params->searches = array();
$params->js_searches = array();
$this->params->set = $params;
$this->setFiletypeSearches();
$this->setCdnPaths();
return $this->params->set;
}
public function onAfterRender()
{
if (!$this->pass)
{
return;
}
$html = JResponse::getBody();
$this->replace($html);
$this->cleanLeftoverJunk($html);
JResponse::setBody($html);
}
function replace(&$string)
{
if (is_array($string))
{
$this->replaceInList($string);
return;
}
$string_array = $this->protectString($string);
foreach ($string_array as $i => &$substring)
{
if ($i % 2)
{
continue;
}
$string_array[$i] = $this->replaceBySetList($substring);
}
$string = implode('', $string_array);
}
function replaceInList(&$array)
{
foreach ($array as &$val)
{
$this->replace($val);
}
}
function replaceBySetList($string)
{
foreach ($this->params->sets as $set)
{
$this->params->set = $set;
$this->replaceBySet($string);
}
return $string;
}
function replaceBySet(&$string)
{
$this->replaceBySearchList($string, $this->params->set->searches);
if (!empty($this->params->set->enable_in_scripts) && strpos($string, '<script') !== false)
{
$this->replaceInJavascript($string);
}
}
function replaceInJavascript(&$string)
{
$regex = '#<script(?:\s+(language|type)\s*=[^>]*)?>.*?</script>#si';
if (preg_match_all($regex, $string, $stringparts, PREG_SET_ORDER) < 1)
{
return;
}
foreach ($stringparts as $stringpart)
{
$this->replaceInJavascriptStringPart($string, $stringpart);
}
}
function replaceInJavascriptStringPart(&$string, $stringpart)
{
$newstr = $stringpart['0'];
if (!$this->replaceBySearchList($newstr, $this->params->set->js_searches))
{
return;
}
$string = str_replace($stringpart['0'], $newstr, $string);
}
function replaceBySearchList(&$string, &$searches)
{
$changed = 0;
foreach ($searches as $search)
{
$changed = $this->replaceBySearch($string, $search);
}
return $changed;
}
function replaceBySearch(&$string, &$search)
{
if (preg_match_all($search, $string, $matches, PREG_SET_ORDER) < 1)
{
return false;
}
$changed = false;
foreach ($matches as $match)
{
list($file, $query) = $this->getFileParts($match['3']);
if (!$file || $this->fileIsIgnored($file))
{
continue;
}
$file = $this->getCdnUrl($file)
. '/' . $this->addQueryToFile($file, $query);
$string = str_replace(
$match['0'],
$match['1'] . $file . $match['4'],
$string
);
$changed = true;
}
return $changed;
}
function getFileParts($file)
{
$file = trim($file);
if (!$file)
{
return array(null, null);
}
if (strpos($file, '?') === false)
{
return array($file, null);
}
list($file, $query) = explode('?', $file, 2);
$query = explode('&', $query);
return array($file, $query);
}
function addQueryToFile($file, $query = array())
{
$file = trim($file);
if (empty($query))
{
return $file;
}
return $file . '?' . implode('&', $query);
}
function fileIsIgnored($file)
{
foreach ($this->params->set->ignorefiles as $ignore)
{
if ($ignore && (strpos($file, $ignore) !== false || strpos(htmlentities($file), $ignore) !== false))
{
return true;
}
}
return false;
}
/*
* Searches are replaced by:
* '\1http(s)://' . $this->params->cdn . '/\3\4'
* \2 is used to reference the possible starting quote
*/
function setFiletypeSearches()
{
if (empty($this->params->set->filetypes))
{
return;
}
$urls = $this->getUrlList();
foreach ($urls as $url)
{
$this->setSearchesByUrl($url);
}
}
/*
* Searches are replaced by:
* '\1http(s)://' . $this->params->cdn . '/\3\4'
* \2 is used to reference the possible starting quote
*/
function getUrlList()
{
// Domain url or root path
$url = preg_quote(str_replace('https://', 'http://', JURI::root()), '#');
$url .= '|' . preg_quote(str_replace('http://', '//', JURI::root()), '#');
if (JURI::root(1))
{
$url .= '|' . preg_quote(JURI::root(1) . '/', '#');
}
$filetypes = implode('|', $this->params->set->filetypes);
$root = preg_quote($this->params->set->root, '#');
$urls = array();
// Absolute path
$urls[] = '(?:' . $url . ')' . $root . '([^ \?QUOTES]+\.(?:' . $filetypes . ')(?:\?[^QUOTES]*)?)';
// Relative path
$urls[] = 'LSLASH' . $root . '([a-z0-9-_]+/[^ \?QUOTES]+\.(?:' . $filetypes . ')(?:\?[^QUOTES]*)?)';
// Relative path - file in root
$urls[] = 'LSLASH' . $root . '([a-z0-9-_]+[^ \?\/QUOTES]+\.(?:' . $filetypes . ')(?:\?[^QUOTES]*)?)';
return $urls;
}
function setSearchesByUrl($url)
{
$url_regex = '\s*' . str_replace('QUOTES', '"\'', $url) . '\s*';
if ($this->params->set->enable_in_scripts)
{
$url_regex_js = str_replace('LSLASH', '', $url_regex);
$this->params->set->js_searches[] = '#((["\']))' . $url_regex_js . '(["\'])#i'; // "..."
}
$url_regex = str_replace('LSLASH', '/?', $url_regex);
$url_regex_can_have_spaces = str_replace('[^ ', '[^', $url_regex);
$this->params->set->searches[] = '#((?:' . $this->params->tag_attribs . ')\s*(["\']))' . $url_regex_can_have_spaces . '(\2)#i'; // attrib="..."
$this->params->set->searches[] = '#((?:' . $this->params->tag_attribs . ')())' . $url_regex . '([\s|>])#i'; // attrib=...
$this->params->set->searches[] = '#(url\(\s*((?:["\'])?))' . $url_regex_can_have_spaces . '(\2\s*\))#i'; // url(...) or url("...")
// add ')' to the no quote checks
$url_regex = '\s*' . str_replace('QUOTES', '"\'\)', $url) . '\s*';
$this->params->set->searches[] = '#(url\(\s*())' . $url_regex . '(\s*\))#i'; // url(...)
}
function getSearchTagAttributes()
{
$attributes = array(
'href=',
'src=',
'data-original=',
'longdesc=',
'poster=',
'@import',
'name="movie" value=',
'property="og:image" content=',
'TileImage" content=',
'rel="{\'link\':'
);
return str_replace(array('"', '=', ' '), array('["\']?', '\s*=\s*', '\s+'), implode('|', $attributes));
}
function getCdnUrl($file)
{
$cdns = $this->params->set->cdns;
return $this->params->set->protocol . $cdns['0'];
}
function setCdnPaths()
{
$this->params->set->cdns = explode(',', $this->params->set->cdn);
foreach ($this->params->set->cdns as $i => $cdn)
{
$cdn = preg_replace('#^.*\://#', '', trim($cdn));
$this->params->set->cdns[$i] = $cdn;
}
}
/**
* Just in case you can't figure the method name out: this cleans the left-over junk
*/
function cleanLeftoverJunk(&$string)
{
$string = str_replace(array('{nocdn}', '{/nocdn}'), '', $string);
}
function protectString($string)
{
if (nnProtect::isEditPage())
{
$string = preg_replace('#(<' . 'form [^>]*(id|name)="(adminForm|postform)".*?</form>)#si', '{nocdn}\1{/nocdn}', $string);
}
if (strpos($string, '{nocdn}') === false || strpos($string, '{/nocdn}') === false)
{
$string = str_replace(array('{nocdn}', '{/nocdn}'), '', $string);
return array($string);
}
$string = str_replace(array('{nocdn}', '{/nocdn}'), '[[CDN_SPLIT]]', $string);
return explode('[[CDN_SPLIT]]', $string);
}
}