api.php

<?php
require_once 'inc/conf.php';

if (defined('API_KEY') && API_KEY != '' && (!array_key_exists("key", $_GET) || $_GET['key'] != API_KEY)) {
  header("HTTP/1.1 401 Unauthorized");
  header("Status: 401");
  die('Unauthorized: Invalid API Key');
}

require_once 'inc/Casimir.php';
$casimir = new Casimir();
$api = defined("API_KEY");
$casimir->handleRequest($api);

if (!in_array($casimir->status, array(NULL, 200))) {
  header("HTTP/1.1 ".$casimir->status);
  header("Status: ".$casimir->status);
}

if (!isset($_GET['format']) || !in_array($_GET['format'], array('text', 'xml'))) {
  $format = DEFAULT_API_FORMAT;
} else {
  $format = $_GET['format'];
}

switch($format) {
  case 'text':
    header('Content-type: text/plain; charset=UTF-8');
    if ($casimir->ok) {
      echo $casimir->base_url.(USE_REWRITE ? '' : '?').$casimir->short;
    } else {
      echo 'Error: '.$casimir->msg;
    }
    break;
  case 'xml':
    header('Content-type: application/xml; charset=UTF-8');
    echo '<'.'?xml version="1.0" encoding="UTF-8"?'.'>'."\n";
    echo '<casimir stat="'.($casimir->ok ? 'ok' : 'error').'">';
    if ($casimir->msg != '') {
      echo '<msg>'.$casimir->msg.'</msg>';
    }
    if ($casimir->ok) {
      echo '<short>'.$casimir->base_url.(USE_REWRITE ? '' : '?').$casimir->short.'</short>';
    }
    echo '</casimir>';
    break;
}