$width= 1000;
$imgpath = preg_replace('{^(?=[0-9]+/)}', 'data/', $imgpath, 1);
-if (!function_exists('popen')) {
- http_response_code(501);
- $target = '501.png';
- header('Content-type: '.mime_content_type($target));
- readfile($target);
- exit;
-}
-
if (!file_exists($imgpath)) {
http_response_code(404);
- exit;
+ $imgpath = '404.png';
+ if (!file_exists($imgpath)) {
+ exit;
+ }
}
$target = "thumb/$height/$imgpath";
-if (!file_exists($target)) {
- try {
- mkthumb($imgpath, $target, $width, $height);
- }
- catch (Exception $e) {
- http_response_code(500);
- trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
+try {
+ mkthumb($imgpath, $target, $width, $height);
+}
+catch (Exception $e) {
+ http_response_code($e->getCode() ?: 500);
+ $target = '500.png';
+ if (file_exists($target)) {
+ header("X-Error: ".$e->getMessage());
+ header('Content-type: '.mime_content_type($target));
+ readfile($target);
exit;
}
+ trigger_error("thumbnail creation failed: ".$e->getMessage(), E_USER_WARNING);
+ exit;
}
header('Content-type: '.mime_content_type($target));
function mkthumb($source, $target, $width, $height)
{
+ if (isset($_GET['backend'])) {
+ $backend = $_GET['backend'];
+ }
+ elseif (file_exists($target)) {
+ return;
+ }
+ else {
+ $backend = 'exec';
+ }
+ $backend = "mkthumb_$backend";
+
@mkdir(dirname($target), 0777, TRUE);
- return mkthumb_exec($source, $target, $width, $height);
+ $backend($source, $target, $width, $height);
}
function mkthumb_exec($source, $target, $width, $height)
{
+ if (!function_exists('popen')) {
+ throw new Exception("exec disallowed on this server", 501);
+ }
$cmd = implode(' ', array_map('escapeshellarg', [
'convert',
'-trim',