<?php
namespace apache\shindig\gadgets\servlet;
use apache\shindig\common\HttpServlet;
use apache\shindig\common\Config;

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/**
 * This class serves the public certificate, quick and dirty hack to make the certificate publicly accessible
 * this combined with the hard coded location in SigningFetcherFactory.php : http://{host}/{prefix}/public.crt
 * for the oauth pub key location makes a working whole
 */
class CertServlet extends HttpServlet {

  /**
   * Handles the get file request, only called on url = /public.crt
   * so this function has no logic other then to output the cert
   */
  public function doGet() {
    $file = Config::get('public_key_file');
    if (! file_exists($file) || ! is_readable($file)) {
      throw new \Exception("Invalid public key location ($file), check config and file permissions");
    }
    $this->setLastModified(filemtime($file));
    readfile($file);
  }
}