71 lines
1.9 KiB
Python
71 lines
1.9 KiB
Python
import struct
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PROP_PAYLOAD_FORMAT_INDICATOR = 1
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PROP_MESSAGE_EXPIRY_INTERVAL = 2
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PROP_CONTENT_TYPE = 3
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PROP_RESPONSE_TOPIC = 8
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PROP_CORRELATION_DATA = 9
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PROP_SUBSCRIPTION_IDENTIFIER = 11
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PROP_SESSION_EXPIRY_INTERVAL = 17
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PROP_ASSIGNED_CLIENT_IDENTIFIER = 18
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PROP_SERVER_KEEP_ALIVE = 19
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PROP_AUTHENTICATION_METHOD = 21
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PROP_AUTHENTICATION_DATA = 22
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PROP_REQUEST_PROBLEM_INFO = 23
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PROP_WILL_DELAY_INTERVAL = 24
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PROP_REQUEST_RESPONSE_INFO = 25
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PROP_RESPONSE_INFO = 26
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PROP_SERVER_REFERENCE = 28
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PROP_REASON_STRING = 31
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PROP_RECEIVE_MAXIMUM = 33
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PROP_TOPIC_ALIAS_MAXIMUM = 34
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PROP_TOPIC_ALIAS = 35
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PROP_MAXIMUM_QOS = 36
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PROP_RETAIN_AVAILABLE = 37
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PROP_USER_PROPERTY = 38
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PROP_MAXIMUM_PACKET_SIZE = 39
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PROP_WILDCARD_SUB_AVAILABLE = 40
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PROP_SUBSCRIPTION_ID_AVAILABLE = 41
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PROP_SHARED_SUB_AVAILABLE = 42
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def gen_byte_prop(identifier, byte):
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prop = struct.pack('BB', identifier, byte)
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return prop
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def gen_uint16_prop(identifier, word):
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prop = struct.pack('!BH', identifier, word)
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return prop
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def gen_uint32_prop(identifier, word):
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prop = struct.pack('!BI', identifier, word)
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return prop
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def gen_string_prop(identifier, s):
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prop = struct.pack('!BH%ds'%(len(s)), identifier, len(s), s)
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return prop
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def gen_string_pair_prop(identifier, s1, s2):
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prop = struct.pack('!BH%dsH%ds'%(len(s1), len(s2)), identifier, len(s1), s1, len(s2), s2)
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return prop
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def gen_varint_prop(identifier, val):
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v = pack_varint(val)
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return struct.pack("!B"+str(len(v))+"s", identifier, v)
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def pack_varint(varint):
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s = ""
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while True:
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byte = varint % 128
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varint = varint // 128
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# If there are more digits to encode, set the top bit of this digit
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if varint > 0:
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byte = byte | 0x80
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s = s + struct.pack("!B", byte)
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if varint == 0:
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return s
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def prop_finalise(props):
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return pack_varint(len(props)) + props
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