class PublicStream extends LocalStream {

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

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

  /**
   * {@inheritdoc}
   */
  public function getDescription() {
    return t('Public local files served by the webserver.');
  }

  /**
   * {@inheritdoc}
   */
  public function getDirectoryPath() {
    return static::basePath();
  }

  /**
   * {@inheritdoc}
   */
  public function getExternalUrl() {
    $path = str_replace('\\', '/', $this
      ->getTarget());
    return static::baseUrl() . '/' . UrlHelper::encodePath($path);
  }

  /**
   * Finds and returns the base URL for public://.
   *
   * Defaults to the current site's base URL plus directory path.
   *
   * Note that this static method is used by \Drupal\system\Form\FileSystemForm
   * so you should alter that form or substitute a different form if you change
   * the class providing the stream_wrapper.public service.
   *
   * @return string
   *   The external base URL for public://
   */
  public static function baseUrl() {
    $settings_base_url = Settings::get('file_public_base_url', '');
    if ($settings_base_url) {
      return (string) $settings_base_url;
    }
    else {
      return $GLOBALS['base_url'] . '/' . static::basePath();
    }
  }

  /**
   * Returns the base path for public://.
   *
   * If we have a setting for the public:// scheme's path, we use that.
   * Otherwise we build a reasonable default based on the site.path service if
   * it's available, or a default behavior based on the request.
   *
   * Note that this static method is used by \Drupal\system\Form\FileSystemForm
   * so you should alter that form or substitute a different form if you change
   * the class providing the stream_wrapper.public service.
   *
   * The site path is injectable from the site.path service:
   * @code
   * $base_path = PublicStream::basePath(\Drupal::getContainer()->getParameter('site.path'));
   * @endcode
   *
   * @param string $site_path
   *   (optional) The site.path service parameter, which is typically the path
   *   to sites/ in a Drupal installation. This allows you to inject the site
   *   path using services from the caller. If omitted, this method will use the
   *   global service container or the kernel's default behavior to determine
   *   the site path.
   *
   * @return string
   *   The base path for public:// typically sites/default/files.
   */
  public static function basePath($site_path = NULL) {
    if ($site_path === NULL) {

      // Find the site path. Kernel service is not always available at this
      // point, but is preferred, when available.
      if (\Drupal::hasService('kernel')) {
        $site_path = \Drupal::getContainer()
          ->getParameter('site.path');
      }
      else {

        // If there is no kernel available yet, we call the static
        // findSitePath().
        $site_path = DrupalKernel::findSitePath(Request::createFromGlobals());
      }
    }
    return Settings::get('file_public_path', $site_path . '/files');
  }

}

Members

Name	Modifiers	Type	Description	Overrides
LocalStream::$context	public	property	Stream context resource.
LocalStream::$handle	public	property	A generic resource handle.
LocalStream::$uri	protected	property	Instance URI (stream).
LocalStream::dirname	public	function	Gets the name of the directory from a given path. Overrides StreamWrapperInterface::dirname
LocalStream::dir_closedir	public	function	Close directory handle. Overrides PhpStreamWrapperInterface::dir_closedir
LocalStream::dir_opendir	public	function	Open directory handle. Overrides PhpStreamWrapperInterface::dir_opendir
LocalStream::dir_readdir	public	function	Read entry from directory handle. Overrides PhpStreamWrapperInterface::dir_readdir
LocalStream::dir_rewinddir	public	function	Rewind directory handle. Overrides PhpStreamWrapperInterface::dir_rewinddir
LocalStream::getFileSystem	private	function	Returns file system service.
LocalStream::getLocalPath	protected	function	Returns the canonical absolute path of the URI, if possible.
LocalStream::getTarget	protected	function	Returns the local writable target of the resource within the stream.
LocalStream::getUri	public	function	Returns the stream resource URI. Overrides StreamWrapperInterface::getUri
LocalStream::mkdir	public	function	Create a directory. Overrides PhpStreamWrapperInterface::mkdir	1
LocalStream::realpath	public	function	Returns canonical, absolute path of the resource. Overrides StreamWrapperInterface::realpath	1
LocalStream::rename	public	function	Renames a file or directory. Overrides PhpStreamWrapperInterface::rename	1
LocalStream::rmdir	public	function	Removes a directory. Overrides PhpStreamWrapperInterface::rmdir	1
LocalStream::setUri	public	function	Sets the absolute stream resource URI. Overrides StreamWrapperInterface::setUri
LocalStream::stream_cast	public	function	Retrieve the underlying stream resource. Overrides PhpStreamWrapperInterface::stream_cast
LocalStream::stream_close	public	function	Closes stream. Overrides PhpStreamWrapperInterface::stream_close
LocalStream::stream_eof	public	function	Tests for end-of-file on a file pointer. Overrides PhpStreamWrapperInterface::stream_eof
LocalStream::stream_flush	public	function	Flushes the output. Overrides PhpStreamWrapperInterface::stream_flush	1
LocalStream::stream_lock	public	function	Advisory file locking. Overrides PhpStreamWrapperInterface::stream_lock	1
LocalStream::stream_metadata	public	function	Sets metadata on the stream. Overrides PhpStreamWrapperInterface::stream_metadata	1
LocalStream::stream_open	public	function	Opens file or URL. Overrides PhpStreamWrapperInterface::stream_open	1
LocalStream::stream_read	public	function	Read from stream. Overrides PhpStreamWrapperInterface::stream_read
LocalStream::stream_seek	public	function	Seeks to specific location in a stream. Overrides PhpStreamWrapperInterface::stream_seek
LocalStream::stream_set_option	public	function	Since Windows systems do not allow it and it is not needed for most use cases anyway, this method is not supported on local files and will trigger an error and return false. If needed, custom subclasses can provide OS-specific implementations for… Overrides PhpStreamWrapperInterface::stream_set_option
LocalStream::stream_stat	public	function	Retrieve information about a file resource. Overrides PhpStreamWrapperInterface::stream_stat
LocalStream::stream_tell	public	function	Retrieve the current position of a stream. Overrides PhpStreamWrapperInterface::stream_tell
LocalStream::stream_truncate	public	function	Truncate stream. Overrides PhpStreamWrapperInterface::stream_truncate	1
LocalStream::stream_write	public	function	Write to stream. Overrides PhpStreamWrapperInterface::stream_write	1
LocalStream::unlink	public	function	Delete a file. Overrides PhpStreamWrapperInterface::unlink	1
LocalStream::url_stat	public	function	Retrieve information about a file. Overrides PhpStreamWrapperInterface::url_stat
PublicStream::basePath	public static	function	Returns the base path for public://.
PublicStream::baseUrl	public static	function	Finds and returns the base URL for public://.
PublicStream::getDescription	public	function	Returns the description of the stream wrapper for use in the UI. Overrides StreamWrapperInterface::getDescription	1
PublicStream::getDirectoryPath	public	function	Gets the path that the wrapper is responsible for. Overrides LocalStream::getDirectoryPath
PublicStream::getExternalUrl	public	function	Returns a web accessible URL for the resource. Overrides StreamWrapperInterface::getExternalUrl
PublicStream::getName	public	function	Returns the name of the stream wrapper for use in the UI. Overrides StreamWrapperInterface::getName	1
PublicStream::getType	public static	function	Returns the type of stream wrapper. Overrides LocalStream::getType	1
StreamWrapperInterface::ALL		constant	A filter that matches all wrappers.
StreamWrapperInterface::HIDDEN		constant	Defines the stream wrapper bit flag for a hidden file.
StreamWrapperInterface::LOCAL		constant	Refers to a local file system location.
StreamWrapperInterface::LOCAL_HIDDEN		constant	Hidden, readable and writable using local files.
StreamWrapperInterface::LOCAL_NORMAL		constant	Visible, readable and writable using local files.
StreamWrapperInterface::NORMAL		constant	This is the default 'type' flag. This does not include StreamWrapperInterface::LOCAL, because PHP grants a greater trust level to local files (for example, they can be used in an "include" statement, regardless of the…
StreamWrapperInterface::READ		constant	Wrapper is readable (almost always true).
StreamWrapperInterface::READ_VISIBLE		constant	Visible and read-only.
StreamWrapperInterface::VISIBLE		constant	Exposed in the UI and potentially web accessible.
StreamWrapperInterface::WRITE		constant	Wrapper is writable.
StreamWrapperInterface::WRITE_VISIBLE		constant	Visible, readable and writable.

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class PublicStream in Drupal 9

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