Kafka以字符串形式发送值：我如何反序列化它并用Python将其转换为JSON对象

我试图从lambda函数中使用MSK（托管Amazon Kafka服务）消息-MSK是我的lambda的触发器

制作人看起来像这样：

data = {'time': 1611215510000000000, 'tags': {'tag1': 'tagvalue'}, 'fields': {'value': 12345}}
self.producer = KafkaProducer(
            security_protocol=self.security_protocol,
            bootstrap_servers=self.kafka_servers,
            value_serializer=lambda x: dumps(x).encode('utf-8'))
self.producer.send(kafka_topic, value=data)

在lambda函数中，我收到以下信息：

{
   "eventSource":"aws:kafka",
   "eventSourceArn":"<arn....>",
   "bootstrapServers":"<serverlist...>",
   "records":{
      "topic-0":[
         {
            "topic":"topic",
            "partition":0,
            "offset":0,
            "timestamp":1611138328871,
            "timestampType":"CREATE_TIME",
            "value":"eyJ0aW1lIjogMTYxMTEzODI4MDAwMDAwMDAwMCwgInRhZ3MiOiB7InN0YXR1cyI6ICJHb29kIn0sICJmaWVsZHMiOiB7InZhbHVlX251bSI6IDAuMCwgInZhbHVlIjogZmFsc2V9fQ=="
         },
         {
            "topic":"topic",
            "partition":0,
            "offset":1,
            "timestamp":1611138330033,
            "timestampType":"CREATE_TIME",
            "value":"eyJ0aW1lIjogMTYxMTEzODI4MDAwMDAwMDAwMCwgInRhZ3MiOiB7InN0YXR1cyI6ICJHb29kIn0sICJmaWVsZHMiOiB7InZhbHVlIjogMTQxMzUuMH19"
         }
    ]
  }
}

---

值字符串似乎是base64编码的，因此需要找到一种方法对其进行解码。然后你可以加载它们

使用以下方法解码的第一个字符串：

records = event['records']['topic-0']
for record in records:
    print(json.loads(record['value']).decode('utf-8'))

{"time": 1611138280000000000, "tags": {"status": "Good"}, "fields": {"value_num": 0.0, "value": false}}