text: """Shared code between dmypy.py and dmypy_server.py.
  
  This should be pretty lightweight and not depend on other mypy code (other than ipc).
  """
  
  import json
  
  from typing import Any
  from typing_extensions import Final
  
  from mypy.ipc import IPCBase
  
  DEFAULT_STATUS_FILE = '.dmypy.json'  # type: Final
  
  
  def receive(connection: IPCBase) -> Any:
      """Receive JSON data from a connection until EOF.
  
      Raise OSError if the data received is not valid JSON or if it is
      not a dict.
      """
      bdata = connection.read()
      if not bdata:
          raise OSError("No data received")
      try:
          data = json.loads(bdata.decode('utf8'))
      except Exception:
          raise OSError("Data received is not valid JSON")
      if not isinstance(data, dict):
          raise OSError("Data received is not a dict (%s)" % str(type(data)))
      return data
  