cvs: phpweb / index.php

markonen Wed May 15 10:30:08 2002 EDT Modified files: /phpweb index.php Log: Let's try the If-Modified-Since negotiation on the front page. Index: phpweb/index.php diff -u phpweb/index.php:1.229 phpweb/index.php:1.230 --- phpweb/index.php:1.229 Tue May 14 17:27:04 2002 +++ phpweb/index.php Wed May 15 10:30:07 2002 @@ -2,7 +2,35 @@ /* if you're reading this, it isn't because you've found a security hole. this is an open source website. read and learn! */ -header("Cache-Control: public, max-age=600"); +/* ------------------------------------------------------------------------- */ + +/* Get the modification dates of the main PHP file */ +$timestamps[] = @getlastmod(); + +/* The date of prepend.inc indicates the age of ALL + included files. Please touch it if you modify an + another include file. The cost of stat'ing them + all is prohibitive. Also note the file path, + we aren't using the include path here. */ +$timestamps[] = @filemtime("include/prepend.inc"); + +/* Calendar is the only dynamic feature on this page. */ +$timestamps[] = @filemtime("backend/events.csv"); + +/* The latest of these modification dates is our real + Last-Modified date. */ +$timestamp = max($timestamps); + +/* Note that this is not a RFC 822 date (the tz is always GMT) */ +$tsstring = gmdate("D, d M Y H:i:s ",$timestamp)."GMT"; + +if ($_SERVER["HTTP_IF_MODIFIED_SINCE"] == $tsstring) { + /* The UA has the exact same page we have. */ + header("HTTP/1.1 304 Not Modified"); + exit(); +} else { + header("Last-Modified: ".$tsstring); +} require_once 'prepend.inc';