mirror of
https://github.com/e107inc/e107.git
synced 2025-10-29 04:38:07 +01:00
294 lines
9.2 KiB
PHP
294 lines
9.2 KiB
PHP
<?php
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/*
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* e107 website system
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*
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* Copyright (C) 2008-2012 e107 Inc (e107.org)
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* Released under the terms and conditions of the
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* GNU General Public License (http://gnu.org).
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*
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* $URL$
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* $Id$
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*
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* FIXME - re-check and fix all browser cache related code
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*
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*/
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global $pref, $eplug_admin;
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class e_jslib
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{
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function __construct()
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{
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}
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/**
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* Called from HEADERF
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* @return string
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*/
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public function renderHeader($where = 'front', $return = false)
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{
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$ret = '';
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/* DEPRECATED
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$ret .= "
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<script type=\"text/javascript\">
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var e107Path = {
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e_IMAGE: '".e_IMAGE_ABS."',
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SITEURL: '".SITEURL."',
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SITEURLBASE: '".SITEURLBASE."',
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e_HTTP: '".e_HTTP."',
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e_IMAGE_PACK: '".e_IMAGE_ABS."',
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e_PLUGIN: '".e_PLUGIN_ABS."',
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e_FILE: '".e_FILE_ABS."',
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e_MEDIA: '".e_MEDIA_ABS."',
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e_WEB: '".e_WEB_ABS."',
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e_ADMIN: '".(deftrue('ADMIN') ? e_ADMIN_ABS : '')."',
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e_THEME: '".e_THEME_ABS."',
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THEME: '".e_THEME_ABS."'
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};
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</script>
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";
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*/
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// FIXED: convert e107.js.php to pure e107.js file
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// FIXED: 'e_jslib_browser_cache' used by js_manager - add it together with all new prefs (JS management tab, Site preferences area)
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// FIXED: option to use external sources (e.g. google) even if JS is combined (script tags for external sources)
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if(!e107::getPref('e_jslib_nocombine'))
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{
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$e_jsmanager = e107::getJs();
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// render CDN frameworks
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$ret .= $e_jsmanager->renderJs('framework', null, true, true);
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$hash = md5(serialize(varset($pref['e_jslib'])).e107::getPref('e_jslib_browser_cache', 0).THEME.e_LANGUAGE.ADMIN).'_'.$where;
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// TODO disable cache in debug mod
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$hash .= (e107::getPref('e_jslib_nocache')/* || deftrue('e_NOCACHE')*/ ? '_nocache' : '').(!e107::getPref('e_jslib_nobcache') || deftrue('e_NOCACHE') ? '_nobcache' : '').(e107::getPref('e_jslib_gzip') ? '' : '_nogzip');
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$ret .= "<script type='text/javascript' src='".e_JS."e_jslib.php?{$hash}'></script>\n";
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// render CDN libraries asap
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$ret .= $e_jsmanager->renderJs('core', null, true, true);
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$ret .= $e_jsmanager->renderJs('plugin', null, true, true);
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$ret .= $e_jsmanager->renderJs('theme', null, true, true);
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if($return) return $ret;
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echo $ret;
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return;
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}
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$e_jsmanager = e107::getJs();
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if(!$return)
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{
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echo $ret;
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$ret = '';
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}
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// script tags
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$ret .= $e_jsmanager->renderJs('core', null, true, $return);
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$ret .= $e_jsmanager->renderJs('plugin', null, true, $return);
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$ret .= $e_jsmanager->renderJs('theme', null, true, $return);
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return $ret;
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}
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/**
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* Collect & output content of all available JS libraries (requires e107 API)
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* FIXME
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* - cache jslib in a pref on plugin/theme install only (plugin.xml, theme.xml)
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* - [done - e_jslib_*] the structure of the cached pref array?
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* - [done - js manager] kill all dupps
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* - jslib settings - Administration area (compression on/off, admin log on/off
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* manual control for included JS - really not sure about this,
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* Force Browser Cache refresh - timestamp added to the url hash)
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* - how and when to add JS lans for core libraries?
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* - [done - js manager] separate methods for collecting & storing JS files (to be used in install/update routines) and output the JS content
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*/
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function getContent()
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{
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//global $pref, $eplug_admin, $THEME_JSLIB, $THEME_CORE_JSLIB;
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ob_start();
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ob_implicit_flush(0);
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$e_jsmanager = e107::getJs();
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$lmodified = array();
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$e_jsmanager->renderJs('core', null, false);
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$lmodified[] = $e_jsmanager->getLastModfied('core');
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$e_jsmanager->renderJs('plugin', null, false);
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$lmodified[] = $e_jsmanager->getLastModfied('plugin');
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$e_jsmanager->renderJs('theme', null, false);
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$lmodified[] = $e_jsmanager->getLastModfied('theme');
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$lmodified[] = $e_jsmanager->getCacheId(); //e107::getPref('e_jslib_browser_cache', 0)
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// last modification time for loaded files
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$lmodified = max($lmodified);
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// send content type
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header('Content-type: text/javascript', true);
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$this->content_out($lmodified);
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// IT CAUSES GREAT TROUBLES ON SOME BROWSERS!
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/*
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if (function_exists('date_default_timezone_set'))
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{
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date_default_timezone_set('UTC');
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}
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// send last modified date
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if(deftrue('e_NOCACHE')) header('Cache-Control: must-revalidate', true);
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if($lmodified) header('Last-modified: '.gmdate("D, d M Y H:i:s", $lmodified).' GMT', true);
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//if($lmodified) header('Last-modified: '.gmdate('r', $lmodified), true);
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// Expire header - 1 year
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$time = time()+ 365 * 86400;
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header('Expires: '.gmdate("D, d M Y H:i:s", $time).' GMT', true);
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// If-Modified check only if cache disabled
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// if cache is enabled, cache file modification date is set to $lmodified
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if(!e107::getPref('syscachestatus'))
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{
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// not modified - send 304 and exit
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if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && $lmodified && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= $lmodified)
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{
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header("HTTP/1.1 304 Not Modified", true);
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exit;
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}
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}
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//Output
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$this->content_out($lmodified);*/
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}
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/**
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* Output buffered content (requires e107 API)
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*
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*/
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function content_out($lmodified)
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{
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global $admin_log;
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$pref = e107::getPref();
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$encoding = $this->browser_enc();
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$contents = ob_get_clean();
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if(!deftrue('e_NOCACHE')) header('Cache-Control: must-revalidate', true);
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$etag = md5($page).($encoding ? '-'.$encoding : '');
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header('ETag: '.$etag, true);
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if($encoding) header('Content-Encoding: ' . $encoding);
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if (!deftrue('e_NOCACHE') && isset($_SERVER['HTTP_IF_NONE_MATCH']))
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{
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$IF_NONE_MATCH = str_replace('"','',$_SERVER['HTTP_IF_NONE_MATCH']);
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if($IF_NONE_MATCH == $etag || ($IF_NONE_MATCH == ($etag.'-'.$encoding)))
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{
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header('HTTP/1.1 304 Not Modified');
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exit();
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}
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}
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if ($encoding)
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{
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$gzdata = "\x1f\x8b\x08\x00\x00\x00\x00\x00";
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$size = strlen($contents);
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$crc = crc32($contents);
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$gzdata .= gzcompress($contents, 9);
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$gzdata = substr($gzdata, 0, -4);
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$gzdata .= pack("V", $crc) . pack("V", $size);
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$gsize = strlen($gzdata);
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$this->set_cache($gzdata, $encoding, $lmodified);
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header('Content-Length: '.$gsize);
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header('X-Content-size: ' . $size);
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print($gzdata);
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//TODO - log/debug
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//@file_put_contents('cache/e_jslib_log', "----------\n cache used - ".$encoding."\nOld size - $size, New compressed size - $gsize\nCache hash: ".($_SERVER['QUERY_STRING'] ? md5($_SERVER['QUERY_STRING']) : 'nomd5')."\n\n", FILE_APPEND);
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}
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else
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{
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//header('Content-Length: '.strlen($contents));
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$this->set_cache($contents, '', $lmodified);
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header('Content-Length: '.strlen($contents));
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print($contents);
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//TODO - log/debug
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//@file_put_contents('cache/e_jslib_log', "----------\nno cache used - raw\n\n", FILE_APPEND);
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}
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exit();
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}
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/**
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* Set Server Cache - create jslib[gzip-string][hash].js
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* (requires e107 API)
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*
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* @param string $contents
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* @param string $encoding browser accepted encoding
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* @param integer $lmodified last modfied time
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*/
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function set_cache($contents, $encoding = '', $lmodified = 0)
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{
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if (e107::getPref('e_jslib_nocache') == '0')
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{
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$cacheFile = $this->cache_filename($encoding);
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if(!$lmodified) $lmodified = time();
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@file_put_contents($cacheFile, $contents);
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@chmod($cacheFile, 0775);
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if($lmodified) @touch($cacheFile, $lmodified);
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}
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}
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/**
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* Detect browser accepted encoding (doesn't require e107 API)
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*
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* @return string encoding
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*/
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function browser_enc()
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{
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//NEW - option to disable completely gzip compression
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if(strpos($_SERVER['QUERY_STRING'], '_nogzip'))
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{
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return '';
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}
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//double-compression fix - thanks Topper
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if (headers_sent() || ini_get('zlib.output_compression') || !isset($_SERVER["HTTP_ACCEPT_ENCODING"]))
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{
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$encoding = '';
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}
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elseif (strpos($_SERVER["HTTP_ACCEPT_ENCODING"], 'x-gzip') !== false)
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{
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$encoding = 'x-gzip';
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}
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elseif (strpos($_SERVER["HTTP_ACCEPT_ENCODING"], 'gzip') !== false)
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{
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$encoding = 'gzip';
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}
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else
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{
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$encoding = '';
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}
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return $encoding;
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}
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/**
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* Create cache filename (require e107 API)
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*
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* @param string $encoding
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* @param string $cacheStr defaults to 'S_e_jslib'
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* @return string cache filename
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*/
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function cache_filename($encoding = '', $cacheStr = 'S_e_jslib')
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{
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$cacheDir = e_CACHE_CONTENT;
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$hash = $_SERVER['QUERY_STRING'] && $_SERVER['QUERY_STRING'] !== '_nogzip' ? md5(str_replace('_nogzip', '', $_SERVER['QUERY_STRING'])) : 'nomd5';
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$cacheFile = $cacheDir . $cacheStr . ($encoding ? '_' . $encoding : '') . '_' . $hash . '.cache.php';
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return $cacheFile;
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}
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}
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