gnu-social/actions/attachment_view.php

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<?php
if (!defined('GNUSOCIAL')) { exit(1); }
/**
* View notice attachment
*
* @package GNUsocial
* @author Miguel Dantas <biodantasgs@gmail.com>
* @license https://www.gnu.org/licenses/agpl-3.0.html GNU Affero General Public License version 3.0
*/
class Attachment_viewAction extends AttachmentAction
{
public function showPage()
{
// Checks file exists or throws FileNotStoredLocallyException
$filepath = $this->attachment->getPath();
$filename = MediaFile::getDisplayName($this->attachment);
// Disable errors, to not mess with the file contents (suppress errors in case access to this
// function is blocked, like in some shared hosts). Automatically reset at the end of the
// script execution, and we don't want to have any more errors until then, so don't reset it
@ini_set('display_errors', 0);
header("Content-Description: File Transfer");
header("Content-Type: {$this->attachment->mimetype}");
if (in_array(common_get_mime_media($this->attachment->mimetype), ['image', 'video'])) {
header("Content-Disposition: inline; filename=\"{$filename}\"");
} else {
header("Content-Disposition: attachment; filename=\"{$filename}\"");
}
header('Expires: 0');
header('Content-Transfer-Encoding: binary');
$this->sendFile($filepath);
}
}