flowsdk 0.5.3

Safety-first, realistic, behavior-predictable messaging SDK for MQTT and more.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

import flowsdk_ffi

def test_mqtt_engine():
    print("--- Testing Standard MqttEngineFfi ---")
    opts = flowsdk_ffi.MqttOptionsFfi(
        client_id="python_client",
        mqtt_version=5,
        clean_start=True,
        keep_alive=60,
        username=None,
        password=None,
        reconnect_base_delay_ms=1000,
        reconnect_max_delay_ms=30000,
        max_reconnect_attempts=0
    )
    engine = flowsdk_ffi.MqttEngineFfi.new_with_opts(opts)
    
    print(f"MQTT Version: {engine.get_version()}")
    
    # Simulate connection
    engine.connect()
    
    # Subscribe
    pid = engine.subscribe("test/topic", 1)
    print(f"Subscribe packet_id: {pid}")
    
    # Publish
    pid = engine.publish("test/topic", b"hello world", 1, None)
    print(f"Publish packet_id: {pid}")
    
    # Simulate receiving a message (loopback)
    print("Simulating message reception...")
    msg = flowsdk_ffi.MqttMessageFfi(topic="test/topic", payload=b"hello loopback", qos=1, retain=False)
    event = flowsdk_ffi.MqttEventFfi.MESSAGE_RECEIVED(msg)
    engine.push_event_ffi(event)
    
    # Check events
    events = engine.take_events()
    for ev in events:
        if ev.is_message_received():
            m = ev[0] # The MqttMessageFfi is the first element in the variant tuple
            print(f"RECEIVED PUBLISH: topic={m.topic}, payload={m.payload.decode()}, qos={m.qos}")
        else:
            print(f"Other Event: {ev}")

    # Disconnect
    engine.disconnect()
    print("Disconnected.")

def test_tls_engine():
    print("\n--- Testing TlsMqttEngineFfi ---")
    opts = flowsdk_ffi.MqttOptionsFfi(
        client_id="tls_client",
        mqtt_version=5,
        clean_start=True,
        keep_alive=60,
        username=None,
        password=None,
        reconnect_base_delay_ms=1000,
        reconnect_max_delay_ms=30000,
        max_reconnect_attempts=0
    )
    tls_opts = flowsdk_ffi.MqttTlsOptionsFfi(
        ca_cert_file=None,
        client_cert_file=None,
        client_key_file=None,
        insecure_skip_verify=True,
        alpn_protocols=["mqtt"]
    )
    
    engine = flowsdk_ffi.TlsMqttEngineFfi(opts, tls_opts, "localhost")
    engine.connect()
    
    # Check for outgoing socket data
    data = engine.take_socket_data()
    print(f"Outgoing TLS data: {len(data)} bytes")
    
    engine.disconnect()
    print("Disconnected.")

def test_quic_engine():
    print("\n--- Testing QuicMqttEngineFfi ---")
    opts = flowsdk_ffi.MqttOptionsFfi(
        client_id="quic_client",
        mqtt_version=5,
        clean_start=True,
        keep_alive=60,
        username=None,
        password=None,
        reconnect_base_delay_ms=1000,
        reconnect_max_delay_ms=30000,
        max_reconnect_attempts=0
    )
    
    engine = flowsdk_ffi.QuicMqttEngineFfi(opts)
    
    tls_opts = flowsdk_ffi.MqttTlsOptionsFfi(
        ca_cert_file=None,
        client_cert_file=None,
        client_key_file=None,
        insecure_skip_verify=True,
        alpn_protocols=["mqtt"]
    )
    
    engine.connect("127.0.0.1:1883", "localhost", tls_opts, 0)
    
    # Check for outgoing datagrams
    datagrams = engine.take_outgoing_datagrams()
    print(f"Outgoing QUIC datagrams: {len(datagrams)}")
    
    # Simulate a tick
    events = engine.handle_tick(100)
    print(f"Tick events: {len(events)}")
    
    engine.disconnect()
    print("Disconnected.")

if __name__ == "__main__":
    try:
        test_mqtt_engine()
        test_tls_engine()
        test_quic_engine()
        print("\nAll verification tests passed!")
    except Exception as e:
        print(f"\nVerification Failed: {e}")
        import traceback
        traceback.print_exc()
        exit(1)