def peek(self, size):
cd, out = pn_transport_peek(self._impl, size)
if cd == PN_EOS:
return None
else:
self._check(cd)
return out
def peek(self, size):
cd, out = pn_transport_peek(self._impl, size)
if cd == PN_EOS:
return None
else:
self._check(cd)
return out
def peek(self, size: int) -> Optional[bytes]:
"""
Returns ``size`` bytes from the head of the transport.
It is an error to call this with a value of ``size`` that
is greater than the value reported by :meth:`pending`.
:param size: Number of bytes to return.
:return: ``size`` bytes from the head of the transport, or ``None``
if none are available.
:raise: :exc:`TransportException` if there is any Proton error.
"""
cd, out = pn_transport_peek(self._impl, size)
if cd == PN_EOS:
return None
else:
self._check(cd)
return out