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How to use deserialize_event method in localstack

Best Python code snippet using localstack_python

race_data_parser.py

Source:race_data_parser.py

...26     horse_result.guts_order, horse_result.wiz_order, horse_result.last_spurt_start_distance,27     horse_result.running_style, horse_result.defeat,28     horse_result.finish_time_raw) = struct.unpack_from('<ifffBBfBif', b, offset)29    return horse_result30def deserialize_event(b: bytearray, offset: int) -> race_data_pb2.RaceSimulateEventData:31    event = race_data_pb2.RaceSimulateEventData()32    fmt = '<fbb'33    (event.frame_time, event.type, event.param_count) = struct.unpack_from(fmt, b, offset)34    offset += struct.calcsize(fmt)35    for i in range(event.param_count):36        event.param.append(struct.unpack_from('<i', b, offset)[0])37        offset += 438    return event39def deserialize(b: bytearray) -> race_data_pb2.RaceSimulateData:40    data = race_data_pb2.RaceSimulateData()41    header, offset = deserialize_header(b)42    data.header.CopyFrom(header)43    fmt = '<fiii'44    data.distance_diff_max, data.horse_num, data.horse_frame_size, data.horse_result_size = \45        struct.unpack_from(fmt, b, offset)46    offset += struct.calcsize(fmt)47    data.__padding_size_1 = struct.unpack_from('<i', b, offset)[0]48    offset += 4 + data.__padding_size_149    fmt = '<ii'50    data.frame_count, data.frame_size = struct.unpack_from(fmt, b, offset)51    offset += struct.calcsize(fmt)52    for i in range(data.frame_count):53        data.frame.append(deserialize_frame(b, offset, data.horse_num, data.horse_frame_size))54        offset += data.frame_size55    data.__padding_size_2 = struct.unpack_from('<i', b, offset)[0]56    offset += 4 + data.__padding_size_257    for i in range(data.horse_num):58        data.horse_result.append(deserialize_horse_result(b, offset))59        offset += data.horse_result_size60    data.__padding_size_3 = struct.unpack_from('<i', b, offset)[0]61    offset += 4 + data.__padding_size_362    data.event_count = struct.unpack_from('<i', b, offset)[0]63    offset += 464    for i in range(data.event_count):65        event_wrapper = race_data_pb2.RaceSimulateData.EventDataWrapper()66        event_wrapper.event_size = struct.unpack_from('<h', b, offset)[0]67        offset += 268        event_wrapper.event.CopyFrom(deserialize_event(b, offset))69        offset += event_wrapper.event_size70        data.event.append(event_wrapper)71    return data72def main():73    b = input('Please paste content of field "race_scenario" here: ').strip('"')74    b = gzip.decompress(base64.b64decode(b))75    print(deserialize(b))76if __name__ == '__main__':...

lambda_integration.py

Source:lambda_integration.py

...23    raw_event_messages = []24    for record in event['Records']:25        # Deserialize into Python dictionary and extract the26        # "NewImage" (the new version of the full ddb document)27        ddb_new_image = deserialize_event(record)28        if MSG_BODY_RAISE_ERROR_FLAG in ddb_new_image.get('data', {}):29            raise Exception('Test exception (this is intentional)')30        # Place the raw event message document into the Kinesis message format31        kinesis_record = {32            'PartitionKey': 'key123',33            'Data': json.dumps(ddb_new_image)34        }35        if MSG_BODY_MESSAGE_TARGET in ddb_new_image.get('data', {}):36            forwarding_target = ddb_new_image['data'][MSG_BODY_MESSAGE_TARGET]37            target_name = forwarding_target.split(':')[-1]38            if forwarding_target.startswith('kinesis:'):39                ddb_new_image['data'][MSG_BODY_MESSAGE_TARGET] = 's3:/test_chain_result'40                kinesis_record['Data'] = json.dumps(ddb_new_image['data'])41                forward_event_to_target_stream(kinesis_record, target_name)42            elif forwarding_target.startswith('s3:'):43                s3_client = aws_stack.connect_to_service('s3')44                test_data = to_bytes(json.dumps({'test_data': ddb_new_image['data']['test_data']}))45                s3_client.upload_fileobj(BytesIO(test_data), TEST_BUCKET_NAME, target_name)46        else:47            raw_event_messages.append(kinesis_record)48    # Forward messages to Kinesis49    forward_events(raw_event_messages)50def deserialize_event(event):51    # Deserialize into Python dictionary and extract the "NewImage" (the new version of the full ddb document)52    ddb = event.get('dynamodb')53    if ddb:54        ddb_deserializer = TypeDeserializer()55        return ddb_deserializer.deserialize({'M': ddb['NewImage']})56    kinesis = event.get('kinesis')57    if kinesis:58        assert kinesis['sequenceNumber']59        kinesis['data'] = json.loads(to_str(base64.b64decode(kinesis['data'])))60        return kinesis61    return event.get('Sns')62def forward_events(records):63    if not records:64        return...

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