diff options
| -rw-r--r-- | app/df.php | 9 |
1 files changed, 8 insertions, 1 deletions
@@ -31,7 +31,8 @@ require_once "class/mesg.class.php"; /* * Serve the resource at the given URI in response to the current * request. When finished, this function will exit PHP and terminate - * this script. + * this script. The response instructs the client to cache the + * result for 24 hours. */ function serveResource(string $uri, ?string $filename = NULL) : void { @@ -40,8 +41,14 @@ function serveResource(string $uri, ?string $filename = NULL) : void if (!$f) exit; + $cachelen = 86400; // secs, 24-hours + $cachedate = gmdate("D, d M Y H:i:s", time() + $cachelen); + header("Content-Type: " . mime_content_type($uri)); header("Content-Length: " . filesize($uri)); + header("Expires: " . $cachedate); + header("Cache-Control: max-age=" . $cachelen); + header("Pragma: cache"); if ($filename) header("Content-Disposition: attachment; filename=\"" . $filename . "\""); |