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fixes #5 - browser cache now better managed and manually enabled per page and per user session via e107::canCache()

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This commit is contained in:
SecretR 2012-12-15 10:25:14 +02:00
parent f2fbd4c4bf
commit b7c0db7640
2 changed files with 56 additions and 6 deletions
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40
e107_handlers/e107_class.php
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@ -2937,6 +2937,46 @@ class e107
define('e_TBQS', $_SERVER['QUERY_STRING']);
}
/**
* Basic implementation of Browser cache control per user session. Awaiting improvement in future versions
* If no argument is passed it returns
* boolean (if current page is cacheable).
* If string is passed, it's asumed to be aboslute request path (e_REQUEST_URI alike)
* If true is passed, e_REQUEST_URI is registered
*/
public static function canCache($set = null)
{
$_data = e107::getSession()->get('__sessionBrowserCache');
if(!is_array($_data)) $_data = array();
if(null === $set)
{
return in_array(e_REQUEST_URI, $_data);
}
// remove e_REQUEST_URI from the set
if(false === $set)
{
$check = array_search(e_REQUEST_URI, $_data);
if(false !== $check)
{
unset($_data[$check]);
e107::getSession()->set('__sessionBrowserCache', $_data);
return;
}
}
if(true === $set)
{
$set = e_REQUEST_URI;
}
if(empty($set) || !is_string($set) || in_array($set, $_data)) return;
$_data[] = $set;
e107::getSession()->set('__sessionBrowserCache', array_unique($_data));
}
/**
* Check if current request is secure (https)

22
e107_themes/templates/footer_default.php
View File

@ -27,9 +27,10 @@ e107::getSession()->shutdown();
// System browser CACHE control - defaults to no cache; override in e107_config or on the fly
// This is temporary solution, we'll implement more flexible way for cache control override
// per page, more investigation needed about cache related headers, browser quirks etc
// Auto-detect from session (registered per page, per user session)
if(!defined('e_NOCACHE'))
{
define('e_NOCACHE', true);
define('e_NOCACHE', !e107::canCache());
}
//
@ -306,7 +307,14 @@ if (abs($_serverTime - $lastSet) > 120)
// H Final HTML
//
// browser cache control - FIXME - use this value as AJAX requests cache control!
echo "\n<!-- ".md5(deftrue('e_NOCACHE') ? time() : e107::getPref('e_jslib_browser_cache'))." -->\n";
// TODO - create the $bcache string via e107 class method, use it in the canCache() method
$uclist = e107::getUser()->getClassList();
sort($uclist, SORT_NUMERIC);
$bcache = (deftrue('e_NOCACHE') ? time() : e107::getPref('e_jslib_browser_cache')).'.'.implode(',', $uclist);
echo "\n<!-- ".md5($bcache)." -->\n";
unset($uclist, $bcache);
if(!deftrue('e_POWEREDBY_DISABLE'))
{
// TODO lan
@ -323,10 +331,9 @@ $etag = md5($page);
//header('Pragma:');
// previously disabled or there is posted data
$canCache = false;
if(!deftrue('e_NOCACHE') && $_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['QUERY_STRING'] != 'logout')
$canCache = e107::canCache();
if($canCache && !deftrue('e_NOCACHE') && $_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['QUERY_STRING'] != 'logout')
{
$canCache = true;
header("Cache-Control: must-revalidate", true);
if(e107::getPref('site_page_expires')) // TODO - allow per page
{
@ -338,6 +345,10 @@ if(!deftrue('e_NOCACHE') && $_SERVER['REQUEST_METHOD'] === 'GET' && $_SERVER['QU
header('Expires: '.gmdate("D, d M Y H:i:s", $time).' GMT', true);
}
}
else
{
$canCache = false;
}
$pref['compression_level'] = 6;
$browser_support = FALSE;
@ -379,7 +390,6 @@ header("X-Powered-By: e107", true); // no less secure than e107-specific html.
if ($canCache && isset($_SERVER['HTTP_IF_NONE_MATCH']))
{
$IF_NONE_MATCH = str_replace('"','',$_SERVER['HTTP_IF_NONE_MATCH']);
if($IF_NONE_MATCH == $etag || ($IF_NONE_MATCH == ($etag."-gzip")))
{
header('HTTP/1.1 304 Not Modified');