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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')