反序列化/解析错误KafkaProtobuf Python

Question

序列化代码（Go 语言）

1.制作人

func NewProducer(kafkaBrokerURL string, kafkaSchemaRegistryUrl string) {
    producerConfig := getKafkaProducerConfig(config.EnvConfig)

    producer, err := confluent_kafka.NewProducer(producerConfig)
    if err != nil {
        log.WithFields(log.Fields{"err": err}).Error("Failed to create Kafka Producer")
        log.Panicf("Unable to create Kafka Producer")
    }

    client, err := schemaregistry.NewClient(schemaregistry.NewConfig(kafkaSchemaRegistryUrl))
    if err != nil {
        log.WithFields(log.Fields{"err": err}).Error("Failed to create Kafka Client")
        log.Panicf("Unable to create Kafka Client")
    }

    serializer, err := protobuf.NewSerializer(client, serde.ValueSerde, protobuf.NewSerializerConfig())
    if err != nil {
        log.WithFields(log.Fields{"err": err}).Error("Failed to create Kafka Serializer")
        log.Panicf("Unable to create Kafka Serializer")
    }

    KafkaProducerInstance = &KafkaProducer{
        producer:   producer,
        serializer: serializer,
    }

    log.Info("Created Kafka Producer and Serializer")
}

2.发送 Kafka 消息

func producerHelper[kdt KafkaMesageDataTypes](message kdt, topicName string) {
    deliveryChan := make(chan confluent_kafka.Event)
    payload, err := KafkaProducerInstance.serializer.Serialize(topicName, &message)
    if err != nil {
        log.Errorf("Failed to serialize payload: %v\n", err)
        close(deliveryChan)
        return
    }

    err = KafkaProducerInstance.producer.Produce(&confluent_kafka.Message{
        TopicPartition: confluent_kafka.TopicPartition{Topic: &topicName, Partition: confluent_kafka.PartitionAny},
        Value:          payload,
    }, deliveryChan)

    if err != nil {
        log.Errorf("Failed to Produce: %v\n", err)
        close(deliveryChan)
        return
    }

    e := <-deliveryChan
    m := e.(*confluent_kafka.Message)

    if m.TopicPartition.Error != nil {
        log.Errorf("Delivery failed: %v\n", m.TopicPartition.Error)
        close(deliveryChan)
        return
    } else {
        log.Infof("Delivered message to topic %s [%d] at offset %v\n",
            *m.TopicPartition.Topic, m.TopicPartition.Partition, m.TopicPartition.Offset)
    }

    close(deliveryChan)
}

尝试使用消息（Diff，Python 中的应用程序）

from confluent_kafka import Consumer, KafkaError
import KafkaDiagnoseResult_pb2  # replace with your generated module name
from google.protobuf.message import DecodeError

# Kafka consumer configuration
conf = {
    'bootstrap.servers': "localhost:9092/v3/",  # Replace with your Kafka server address
    'group.id': "myGroup",
    'auto.offset.reset': 'earliest'
}

# Create a consumer instance
consumer = Consumer(conf)

# Subscribe to a topic
from confluent_kafka import Consumer, KafkaError
import KafkaDiagnoseResult_pb2
from google.protobuf.message import DecodeError

# Kafka consumer configuration
conf = {
    'bootstrap.servers': "localhost:9092/v3/",
    'group.id': "myGroup",
    'auto.offset.reset': 'earliest'
}

# Create a consumer instance
consumer = Consumer(conf)

# Subscribe to a topic
consumer.subscribe(['diagnosis']) 
try:
    while True:
        msg = consumer.poll(1.0)

        if msg is None:
            continue
        if msg.error():
            if msg.error().code() == KafkaError._PARTITION_EOF:
                # End of partition event
                continue
            else:
                print(msg.error())
                break

        # Deserialize the message
        try:
            data = KafkaDiagnoseResult_pb2.KafkaDiagnoseRequest() 
            data.ParseFromString(msg.value())
        except DecodeError as e:
            print(f"Error parsing message: {e}")
            print(f"Raw message data: {msg.value()}")

        print("Received message: ", data)

except KeyboardInterrupt:
    pass
finally:
    consumer.close()

错误

Error parsing message

我正在尝试调试它，但无法。

1. 两个应用程序中的 proto 文件是相同的
2. 我使用

   proton

   来生成pb2文件。

感谢您的帮助。

谢谢你

我可以获取原始格式的消息：

原始格式消息。

Raw message data: b'\x00\x00\x00\x00\x02\x02\x08\n$1775100a-1a47-48b2-93b7-b7a331be59b4\x12\tcompleted'

• 我尝试使用 UTF-8 对其进行解码，但失败了，因为并非所有字段都被读取。

   print(" Decode 1: ", dict_str)
   print("Decode 2: ", ast.literal_eval(dict_str))

上述代码的输出：

Unparsed Message:  b'\x00\x00\x00\x00\x02\x02\x08\n$ccb0ad7e-abb2-4af6-90d1-187381f9d47e\x12\tcompleted'
 Decode 1:  
$ccb0ad7e-abb2-4af6-90d1-187381f9d47e   completed
Inner Exception Here source code string cannot contain null bytes

Answer 1

从错误消息 RE source code can not contains null bytes 来看，我假设问题出在你的 python 代码所在的文件上，而不是代码本身。你可能是在Windows机器上写的吗？

在命令提示符下尝试一下：

python -c 'import sys; sys.stdout.write(sys.stdin.read().replace("\0", ""))' < filename.py > filename.new.py

将文件名替换为源代码的文件名，并对每个 python 文件重复此操作。

这应该会删除源文件中的任何空字节。