php [cakephp：MediaController]用文件二进制文件返回cake的响应对象。 #cakephp

Posted 2021-05-05

<?php
/**
 * MediaController
 *
 * http://xxxx/media/print/hogehoge.jpg みたいなアクセスに対して
 * ログイン済みだったらファイルをバイナリ返却したいよっていう感じ
 * $this->Auth->user() の方が良いが SessionKey で複数の認証ロールがある想定の手抜き
 * あと $this->shutdown() は Cake のエラー系例外スロー用の独自メソッドを AppController にもたせてる
 * 
 * @link https://book.cakephp.org/3.0/ja/controllers/request-response.html#cake-response-file
 */
namespace App\Controller;

use App\Controller\AppController;
use Cake\Event\Event;

class MediaController extends AppController
{

  
  /**
   * Verify auth session.
   * @param  Cake\Event\Event $event
   * @return void
   */
  public function beforeFilter(Event $event) {
    parent::beforeFilter($event);
    if (!$this->Session->check('Auth')) $this->shutdown(403);
  }


  /**
   * Return getting file from $path in the FILE_PATH.
   * @param  string $path
   * @return Cake\Http\Response - With file by ::withFile().
   */
  public function print(string $path) {
    if (empty($path)) $this->shutdown(404);
    if (!file_exists(FILES_DIR.DS.$path)) $this->shutdown(404);
    $response = $this->response->withFile(FILES_DIR.DS.$path);
    return $response ?? $this->shutdown(500);
  }
  
  
  /**
   * Return cake response with forced download file.
   * @param  string      $path
   * @param  string|null $filename - Should be to url decode.
   * @return Cake\Http\Response    - With file by ::withFile().
   */
  public function download(string $path, string $filename=null) {
    if (empty($path)) $this->shutdown(404);
    if (!file_exists(FILES_DIR.DS.$path)) $this->shutdown(404);
    $options = ['download' => true];
    if (!empty($filename)) $options += ['name' => urldecode($filename)];
    $response = $this->response->withFile(FILES_DIR.DS.$path, $options);
    return $response ?? $this->shutdown(500);
  }


}