AWS SQS FIFO队列消息事件对象及messageAttributes格式示例咨询

以下是包含messageAttributes子对象的完整SQS FIFO队列触发Lambda的事件对象示例，涵盖了FIFO队列特有的字段以及不同类型的消息属性：

{
  "Records": [
    {
      "messageId": "12345678-1234-1234-1234-1234567890ab",
      "receiptHandle": "AQEBzWwaftRI0KuVm4tP+/7q1rGgNqicHq2R6KSV0uCW2g==",
      "body": "FIFO队列的业务消息内容",
      "attributes": {
        "ApproximateReceiveCount": "1",
        "SentTimestamp": "1690000000000",
        "SenderId": "AIDA1234567890EXAMPLE",
        "ApproximateFirstReceiveTimestamp": "1690000001000",
        "SequenceNumber": "12345678901234567890123456789012345678901234567890123456",
        "MessageGroupId": "order-processing-group-001",
        "MessageDeduplicationId": "order-7890-dedup-20240520",
        "AWSTraceHeader": "Root=1-602e71f6-5c6b04245f199c004EXAMPLE"
      },
      "messageAttributes": {
        "OrderId": {
          "stringValue": "ORD-7890",
          "stringListValues": [],
          "binaryListValues": [],
          "dataType": "String"
        },
        "TotalAmount": {
          "stringValue": "199.99",
          "stringListValues": [],
          "binaryListValues": [],
          "dataType": "Number"
        },
        "UserSessionData": {
          "binaryValue": "eyJ1c2VySWQiOiIxMjM0NSIsInNlc3Npb25JZCI6IjY3ODkwIn0=",
          "stringListValues": [],
          "binaryListValues": [],
          "dataType": "Binary"
        }
      },
      "md5OfBody": "9e107d9d372bb6826bd81d3542a419d6",
      "md5OfMessageAttributes": "a1b2c3d4e5f67890abcdef1234567890",
      "eventSource": "aws:sqs",
      "eventSourceARN": "arn:aws:sqs:us-east-1:123456789012:my-order-fifo-queue.fifo",
      "awsRegion": "us-east-1"
    }
  ]
}

核心字段解析 #

• messageAttributes结构细节：

  • dataType：必填字段，仅支持String/Number/Binary三种类型
  • stringValue：对应String/Number类型的属性值，以字符串格式存储
  • binaryValue：对应Binary类型的属性值，内容为Base64编码的二进制数据
  • stringListValues/binaryListValues：用于存储列表型属性值（未使用时为空数组）

• FIFO队列专属字段：

  • MessageGroupId：消息分组标识，同组内的消息会被按顺序处理
  • MessageDeduplicationId：消息去重标识，相同ID的消息不会被重复写入队列
  • SequenceNumber：FIFO队列中消息的全局唯一序列号，用于确认消息顺序

内容的提问来源于stack exchange，提问作者REN