async def receive_request(self, request: Request) -> Transaction:
"""
Handle duplicates and store received messages.
:type request: Request
:param request: the incoming request
:rtype : Transaction
:return: the edited transaction
"""
logger.debug("receive_request - {0}".format(request))
try:
host, port = request.source
except TypeError or AttributeError: # pragma: no cover
raise errors.CoAPException("Request Source cannot be computed")
key_mid = utils.str_append_hash(host, port, request.mid)
key_token = utils.str_append_hash(host, port, request.token)
transaction = self._transactions.get(key_mid, None)
if transaction is not None:
from_token = self._transactions_token.get(key_token, None)
if from_token is None:
logger.warning("Duplicated message with different Token")
raise errors.ProtocolError(msg="Tokens does not match",
mid=transaction.request.mid)
transaction.request.duplicated = True
else:
request.timestamp = time.time()
transaction = Transaction(request=request, timestamp=request.timestamp)
self._transactions[key_mid] = transaction
self._transactions_token[key_token] = transaction
return transaction
async def send_request(self, request: Request):
"""
Create the transaction and fill it with the outgoing request.
:type request: Request
:param request: the request to send
:rtype : Transaction
:return: the created transaction
"""
try:
host, port = request.destination
except TypeError or AttributeError: # pragma: no cover
raise errors.CoAPException("Request destination cannot be computed")
request.timestamp = time.time()
transaction = Transaction(request=request, timestamp=request.timestamp)
if transaction.request.type is None: # pragma: no cover
raise errors.CoAPException("Request type is not set")
if transaction.request.mid is None:
transaction.request.mid = self.fetch_mid()
key_mid = utils.str_append_hash(host, port, request.mid)
self._transactions[key_mid] = transaction
key_token = utils.str_append_hash(host, port, request.token)
self._transactions_token[key_token] = transaction
logger.debug("send_request - {0}".format(request))
return transaction
