55 lines
1.3 KiB
PHP
55 lines
1.3 KiB
PHP
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<?php
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/**
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* Copyright (c) 2011 Bart Visscher bartv@thisnet.nl
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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class OC_Response {
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const STATUS_NOT_MODIFIED = 304;
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static public function enableCaching() {
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header('Cache-Control: cache');
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header('Pragma: cache');
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}
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static public function setStatus($status) {
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switch($status) {
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case self::STATUS_NOT_MODIFIED:
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$status = $status . ' Not Modified';
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break;
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}
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header($_SERVER["SERVER_PROTOCOL"].' '.$status);
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}
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static public function setETagHeader($etag) {
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if (empty($etag)) {
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return;
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}
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self::enableCaching();
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if (isset($_SERVER['HTTP_IF_NONE_MATCH']) &&
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trim($_SERVER['HTTP_IF_NONE_MATCH']) == $etag) {
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self::setStatus(self::STATUS_NOT_MODIFIED);
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exit;
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}
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header('ETag: '.$etag);
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}
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static public function setLastModifiedHeader($lastModified) {
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if (empty($lastModified)) {
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return;
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}
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if ($lastModified instanceof DateTime) {
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$lastModified = $lastModified->format(DateTime::RFC2822);
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}
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self::enableCaching();
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if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) &&
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trim($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $lastModified) {
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self::setStatus(self::STATUS_NOT_MODIFIED);
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exit;
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}
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header('Last-Modified: '.$lastModified);
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}
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}
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