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-------
int
Number of bytes consumed from ``f``.
MqttPublish
Object extracted from ``f``.
""""""
assert header.packet_type == MqttControlPacketType.publish
dupe = bool(header.flags & 0x08)
retain = bool(header.flags & 0x01)
qos = ((header.flags & 0x06) >> 1)
if qos == 0 and dupe:
# The DUP flag MUST be set to 0 for all QoS 0 messages
# [MQTT-3.3.1-2]
raise DecodeError(""Unexpected dupe=True for qos==0 message [MQTT-3.3.1-2]."")
decoder = mqtt_io.FileDecoder(mqtt_io.LimitReader(f, header.remaining_len))
num_bytes_consumed, topic_name = decoder.unpack_utf8()
if qos != 0:
# See MQTT 3.1.1 section 3.3.2.2
# See https://github.com/kcallin/mqtt-codec/issues/5
packet_id, = decoder.unpack(mqtt_io.FIELD_PACKET_ID)
else:
packet_id = 0
payload_len = header.remaining_len - decoder.num_bytes_consumed
payload = decoder.read(payload_len)
return decoder.num_bytes_consumed, MqttPublish(packet_id, topic_name, payload, dupe, qos, retain)"
1173,"def decode_body(cls, header, f):
""""""Generates a `MqttPubrel` packet given a
`MqttFixedHeader`. This method asserts that header.packet_type
is `pubrel`.
Parameters
----------
header: MqttFixedHeader
f: file
Object with a read method.
Raises
------
DecodeError
When there are extra bytes at the end of the packet.
Returns
-------
int
Number of bytes consumed from ``f``.
MqttPubrel
Object extracted from ``f``.
""""""
assert header.packet_type == MqttControlPacketType.pubrel
decoder = mqtt_io.FileDecoder(mqtt_io.LimitReader(f, header.remaining_len))
packet_id, = decoder.unpack(mqtt_io.FIELD_U16)
if header.remaining_len != decoder.num_bytes_consumed:
raise DecodeError('Extra bytes at end of packet.')
return decoder.num_bytes_consumed, MqttPubrel(packet_id)"
1174,"def decode_body(cls, header, f):
""""""Generates a `MqttUnsubscribe` packet given a
`MqttFixedHeader`. This method asserts that header.packet_type
is `unsubscribe`.
Parameters
----------
header: MqttFixedHeader
f: file
Object with a read method.
Raises
------
DecodeError
When there are extra bytes at the end of the packet.
Returns
-------
int
Number of bytes consumed from ``f``.
MqttUnsubscribe
Object extracted from ``f``.
""""""
assert header.packet_type == MqttControlPacketType.unsubscribe
decoder = mqtt_io.FileDecoder(mqtt_io.LimitReader(f, header.remaining_len))
packet_id, = decoder.unpack(mqtt_io.FIELD_PACKET_ID)
topics = []
while header.remaining_len > decoder.num_bytes_consumed:
num_str_bytes, topic = decoder.unpack_utf8()
topics.append(topic)
assert header.remaining_len - decoder.num_bytes_consumed == 0
return decoder.num_bytes_consumed, MqttUnsubscribe(packet_id, topics)"
1175,"def decode_body(cls, header, f):