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removed subfolder, use last_modified_time

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Joshua Seigler 2016-06-26 11:32:25 -04:00
parent d7716f6e80
commit 0c8c06fdd2
6 changed files with 195 additions and 722 deletions
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24
buffer.php
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@ -3,6 +3,8 @@
// Based on PHP code by Dennis Pallett: www.phpit.net
// Please acknowledge use of this code by including this header.
// Updated to include and use last-modified and etag headers
// location and prefix for cache files
define('CACHE_PATH', "/tmp/cache_");
@ -22,7 +24,20 @@
// check that cache file exists and is not too old
if(!file_exists($file)) return;
if(filemtime($file) < time() - CACHE_TIME) return;
$last_modified_time = filemtime($file);
if($last_modified_time < time() - CACHE_TIME) return;
$etag = md5_file($file);
// always send headers
header("Last-Modified: ".gmdate("D, d M Y H:i:s", $last_modified_time)." GMT");
header("Etag: $etag");
// exit if not modified
if (@strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $last_modified_time ||
@trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) {
header("HTTP/1.1 304 Not Modified");
exit;
}
// if so, display cache file and stop processing
readfile($file);
@ -36,6 +51,13 @@
fwrite($f, $content);
fclose($f);
}
$last_modified_time = filemtime($file);
$etag = md5_file($file);
// always send headers
header("Last-Modified: ".gmdate("D, d M Y H:i:s", $last_modified_time)." GMT");
header("Etag: $etag");
return $content;
}