import socket class TransportSocket: """A socket-like wrapper for exposing real transport sockets. These objects can be safely returned by APIs like `transport.get_extra_info('socket')`. All potentially disruptive operations (like "socket.close()") are banned. """ __slots__ = ('_sock',) def __init__(self, sock: socket.socket): self._sock = sock @property def family(self): return self._sock.family @property def type(self): return self._sock.type @property def proto(self): return self._sock.proto def __repr__(self): s = ( f"<asyncio.TransportSocket fd={self.fileno()}, " f"family={self.family!s}, type={self.type!s}, " f"proto={self.proto}" ) if self.fileno() != -1: try: laddr = self.getsockname() if laddr: s = f"{s}, laddr={laddr}" except socket.error: pass try: raddr = self.getpeername() if raddr: s = f"{s}, raddr={raddr}" except socket.error: pass return f"{s}>" def __getstate__(self): raise TypeError("Cannot serialize asyncio.TransportSocket object") def fileno(self): return self._sock.fileno() def dup(self): return self._sock.dup() def get_inheritable(self): return self._sock.get_inheritable() def shutdown(self, how): # asyncio doesn't currently provide a high-level transport API # to shutdown the connection. self._sock.shutdown(how) def getsockopt(self, *args, **kwargs): return self._sock.getsockopt(*args, **kwargs) def setsockopt(self, *args, **kwargs): self._sock.setsockopt(*args, **kwargs) def getpeername(self): return self._sock.getpeername() def getsockname(self): return self._sock.getsockname() def getsockbyname(self): return self._sock.getsockbyname() def settimeout(self, value): if value == 0: return raise ValueError( 'settimeout(): only 0 timeout is allowed on transport sockets') def gettimeout(self): return 0 def setblocking(self, flag): if not flag: return raise ValueError( 'setblocking(): transport sockets cannot be blocking')