def capture_messages(self,
expected_message_types: list,
timeout: int = 20,
buf_size: int = 1024,
ignore_empty: bool = False) -> list:
deadline = time() + timeout
found = []
partial_message = None
while expected_message_types and time() < deadline:
try:
received_data = self.connection.recv(buf_size)
if partial_message:
received_data = partial_message + received_data
except socket.timeout:
continue
if not received_data:
sleep(0.1)
continue
for raw_message in self.split_message(received_data):
try:
message = MsgSerializable.from_bytes(raw_message)
except (SerializationError, SerializationTruncationError,
ValueError):
partial_message = raw_message
continue
partial_message = None
if not message:
# unknown message type, skipping
continue
msg_type = type(message)
if msg_type is msg_ping:
logger.debug('Got ping, sending pong.')
self.send_pong(message)
elif msg_type is msg_version:
logger.debug('Saving version')
self.protocol_version = message
if msg_type in expected_message_types:
found.append(message)
expected_message_types.remove(msg_type)
logger.debug('Found %s, %s more to catch',
msg_type.command.upper(),
len(expected_message_types))
if not expected_message_types:
return found
if not ignore_empty:
logger.error('Not all messages could be captured')
def capture_messages(self,
expected_message_types: list,
timeout: int = 20,
buf_size: int = 1024,
ignore_empty: bool = False) -> list:
'''
Method for receiving messages from network nodes.
Args:
expected_message_types (list): list of message types to search for
timeout (int): timeout for waiting for messages
buf_size (int): buffer size that is going to be used for receiving messages
ignore_empty (bool): flag for ignoring errors if the message that we're looking for wasn't found.
Eg. this flag can be set to True when looking for reject messages because the absence of the
reject message is not an error.
Returns:
list, None: list of received messages or None if none or not all expected message types were found
Example:
>>> from bitcoin.messages import msg_verack, msg_version
>>> network.capture_messages([msg_version, msg_verack])
'''
deadline = time() + timeout
found = []
partial_message = None
while expected_message_types and time() < deadline:
try:
received_data = self.connection.recv(buf_size)
if partial_message:
received_data = partial_message + received_data
except socket.timeout:
continue
if not received_data:
sleep(0.1)
continue
for raw_message in self.split_message(received_data):
try:
message = MsgSerializable.from_bytes(raw_message)
except (SerializationError, SerializationTruncationError,
ValueError):
partial_message = raw_message
continue
partial_message = None
if not message:
# unknown message type, skipping
continue
msg_type = type(message)
if msg_type is msg_ping:
logger.debug('Got ping, sending pong.')
self.send_pong(message)
elif msg_type is msg_version:
logger.debug('Saving version')
self.protocol_version = message
if msg_type in expected_message_types:
found.append(message)
expected_message_types.remove(msg_type)
logger.debug('Found %s, %s more to catch',
msg_type.command.upper(),
len(expected_message_types))
if not expected_message_types:
return found
if not ignore_empty:
logger.error('Not all messages could be captured')
