content: from __future__ import annotations
  
  import http
  import logging
  from typing import TYPE_CHECKING, Any, NewType, Sequence
  
  
  __all__ = [
      "Data",
      "LoggerLike",
      "StatusLike",
      "Origin",
      "Subprotocol",
      "ExtensionName",
      "ExtensionParameter",
  ]
  
  
  # Public types used in the signature of public APIs
  
  Data = str | bytes
  """Types supported in a WebSocket message:
  :class:`str` for a Text_ frame, :class:`bytes` for a Binary_ frame.
  
  .. _Text: https://datatracker.ietf.org/doc/html/rfc6455#section-5.6
  .. _Binary : https://datatracker.ietf.org/doc/html/rfc6455#section-5.6
  
  """
  
  BytesLike = bytes | bytearray | memoryview
  """Types accepted where :class:`bytes` is expected."""
  
  DataLike = str | bytes | bytearray | memoryview
  """Types accepted where :class:`Data` is expected."""
  
  if TYPE_CHECKING:
      LoggerLike = logging.Logger | logging.LoggerAdapter[Any]
      """Types accepted where a :class:`~logging.Logger` is expected."""
  else:  # remove this branch when dropping support for Python < 3.11
      LoggerLike = logging.Logger | logging.LoggerAdapter
      """Types accepted where a :class:`~logging.Logger` is expected."""
  
  
  StatusLike = http.HTTPStatus | int
  """
  Types accepted where an :class:`~http.HTTPStatus` is expected."""
  
  
  Origin = NewType("Origin", str)
  """Value of a ``Origin`` header."""
  
  
  Subprotocol = NewType("Subprotocol", str)
  """Subprotocol in a ``Sec-WebSocket-Protocol`` header."""
  
  
  ExtensionName = NewType("ExtensionName", str)
  """Name of a WebSocket extension."""
  
  ExtensionParameter = tuple[str, str | None]
  """Parameter of a WebSocket extension."""
  
  
  # Private types
  
  ExtensionHeader = tuple[ExtensionName, Sequence[ExtensionParameter]]
  """Extension in a ``Sec-WebSocket-Extensions`` header."""
  
  
  ConnectionOption = NewType("ConnectionOption", str)
  """Connection option in a ``Connection`` header."""
  
  
  UpgradeProtocol = NewType("UpgradeProtocol", str)
  """Upgrade protocol in an ``Upgrade`` header."""
  