PrivateStream.php

<?php

/**
 * @file
 * Definition of Drupal\Core\StreamWrapper\PrivateStream.
 */

namespace Drupal\Core\StreamWrapper;

/**
 * Drupal private (private://) stream wrapper class.
 *
 * Provides support for storing privately accessible files with the Drupal file
 * interface.
 */
class PrivateStream extends LocalStream {

  /**
   * Implements Drupal\Core\StreamWrapper\LocalStream::getDirectoryPath()
   */
  public function getDirectoryPath() {
    return config('system.file')->get('path.private');
  }

  /**
   * Implements Drupal\Core\StreamWrapper\StreamWrapperInterface::getExternalUrl().
   *
   * @return string
   *   Returns the HTML URI of a private file.
   */
  function getExternalUrl() {
    $path = str_replace('\\', '/', $this->getTarget());
    return url('system/files/' . $path, array('absolute' => TRUE));
  }
}