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boinc
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Caching now supports If-Modified-Since request header. 

svn path=/trunk/boinc/; revision=3912
This commit is contained in:
Eric J. Korpela 2004-07-20 21:54:18 +00:00
parent 572ccf2b76
commit 957a67e3d9
1 changed files with 20 additions and 3 deletions
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23
html/inc/cache.inc
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@ -14,8 +14,25 @@ function get_path($params) {
function start_cache($max_age, $params=""){
$path = get_path($params);
$request = getallheaders();
// Check to see if this is a conditional fetch.
$lastmodified = @filemtime($path);
if (@filemtime($path)<time()-$max_age){
$if_modified_since = isset($request['If-Modified-Since']) ?
(explode(';',$request['If-Modified-Since'])) :
false;
if ($if_modified_since) {
$if_modified_since=strtotime($if_modified_since[0]);
}
if ($if_modified_since && ($if_modified_since == $lastmodified)) {
Header("Last-Modified: " . gmdate("D, d M Y H:i:s",$lastmodified) . " GMT");
Header('HTTP/1.0 304 Not Modified');
exit;
}
if ($lastmodified<time()-$max_age){
// If cached version is too old (or non-existent)
// generate the page and write to cache
//
@ -30,8 +47,8 @@ function start_cache($max_age, $params=""){
if (strstr($params, "format=xml")) {
header('Content-type: text/xml');
}
Header("Last-Modified: " . gmdate("D, d M Y H:i:s",@filemtime($path)) . " GMT");
Header("Expires: " . gmdate("D, d M Y H:i:s",@filemtime($path)+$max_age) . " GMT");
Header("Last-Modified: " . gmdate("D, d M Y H:i:s",$lastmodified) . " GMT");
Header("Expires: " . gmdate("D, d M Y H:i:s",$lastmodified+$max_age) . " GMT");
Header("Cache-Control: public, max-age=" . $max_age );
readfile($path);
exit;