TemporaryStream.php

<?php

namespace Drupal\Core\StreamWrapper;

use Drupal\Core\Url;

/**
 * Defines a Drupal temporary (temporary://) stream wrapper class.
 *
 * Provides support for storing temporarily accessible files with the Drupal
 * file interface.
 */
class TemporaryStream extends LocalStream {

  /**
   * {@inheritdoc}
   */
  public static function getType() {
    return StreamWrapperInterface::LOCAL_HIDDEN;
  }

  /**
   * {@inheritdoc}
   */
  public function getName() {
    return t('Temporary files');
  }

  /**
   * {@inheritdoc}
   */
  public function getDescription() {
    return t('Temporary local files for upload and previews.');
  }

  /**
   * {@inheritdoc}
   */
  public function getDirectoryPath() {
    return \Drupal::service('file_system')
      ->getTempDirectory();
  }

  /**
   * {@inheritdoc}
   */
  public function getExternalUrl() {
    $path = str_replace('\\', '/', $this
      ->getTarget());
    return Url::fromRoute('system.temporary', [], [
      'absolute' => TRUE,
      'query' => [
        'file' => $path,
      ],
    ])
      ->toString();
  }

}