friendica/view/theme/vier/style.php

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<?php
/**
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* @copyright Copyright (C) 2010-2021, the Friendica project
*
* @license GNU AGPL version 3 or any later version
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
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use Friendica\Core\Logger;
use Friendica\DI;
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use Friendica\Network\HTTPException\NotModifiedException;
$uid = $_REQUEST['puid'] ?? 0;
$style = DI::pConfig()->get($uid, 'vier', 'style');
if (empty($style)) {
$style = DI::config()->get('vier', 'style');
}
if (empty($style)) {
$style = "plus";
}
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$stylecss = '';
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$modified = '';
$style = \Friendica\Util\Strings::sanitizeFilePathItem($style);
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foreach (['style', $style] as $file) {
$stylecssfile = $THEMEPATH . DIRECTORY_SEPARATOR . $file .'.css';
if (file_exists($stylecssfile)) {
$stylecss .= file_get_contents($stylecssfile);
$stylemodified = filemtime($stylecssfile);
if ($stylemodified > $modified) {
$modified = $stylemodified;
}
} else {
//TODO: use Logger::ERROR?
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Logger::notice('Error: missing file: "' . $stylecssfile .'" (userid: '. $uid .')');
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}
}
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$modified = gmdate('r', $modified);
$etag = md5($stylecss);
// Only send the CSS file if it was changed
header('Cache-Control: public');
header('ETag: "'.$etag.'"');
header('Last-Modified: '.$modified);
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && isset($_SERVER['HTTP_IF_NONE_MATCH'])) {
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$cached_modified = gmdate('r', strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']));
$cached_etag = str_replace(['"', "-gzip"], ['', ''],
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stripslashes($_SERVER['HTTP_IF_NONE_MATCH']));
if (($cached_modified == $modified) && ($cached_etag == $etag)) {
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throw new NotModifiedException();
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}
}
echo $stylecss;