<?php
require_once __DIR__ . '/../src/config.php';
header('Content-Type: application/json');
$uri = strtok($_SERVER['REQUEST_URI'], '?');
if (!preg_match('#^/f-status/([a-f0-9]{32})$#', $uri, $m)) {
  echo json_encode(['error' => 'invalid']);
  exit;
}
$t = $m[1];
$file_path = FILES_DIR . '/' . $t;
echo json_encode(['exists' => file_exists($file_path)]);
exit;