Keep track of the tools you need to do your job.
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<?php
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
require_once __DIR__ . "/required.php";
$base = $SETTINGS['file_upload_path'] . "/";
if (isset($_GET['i'])) {
$file = $_GET['i'];
$filepath = $base . $file;
if (!file_exists($filepath) || is_dir($filepath)) {
http_response_code(404);
die("404 File Not Found");
}
if (strpos(realpath($filepath), $SETTINGS['file_upload_path']) !== 0) {
http_response_code(404);
die("404 File Not Found");
}
} else {
http_response_code(404);
die("404 File Not Found");
}
if (filesize($filepath) > 11) {
$imagetype = exif_imagetype($filepath);
} else {
$imagetype = false;
}
switch ($imagetype) {
case IMAGETYPE_JPEG:
$mimetype = "image/jpeg";
break;
case IMAGETYPE_GIF:
$mimetype = "image/gif";
break;
case IMAGETYPE_PNG:
$mimetype = "image/png";
break;
case IMAGETYPE_WEBP:
$mimetype = "image/webp";
break;
default:
$mimetype = "application/octet-stream";
}
header("Content-Type: $mimetype");
header('Content-Length: ' . filesize($filepath));
header("X-Content-Type-Options: nosniff");
$seconds_to_cache = 60 * 60 * 12; // 12 hours
$ts = gmdate("D, d M Y H:i:s", time() + $seconds_to_cache) . " GMT";
header("Expires: $ts");
header("Pragma: cache");
header("Cache-Control: max-age=$seconds_to_cache");
ob_end_flush();
readfile($filepath);