amazon-s3 - 创建具有特定前缀的对象时触发 lambda

Question

我正在创建一个 lambda，当在某个存储桶中创建对象时应该调用该 lambda。我只希望针对某些键前缀调用它。我见过examples定义存储桶时，在存储桶上使用 NotificationConfiguration 进行设置:

NotificationConfiguration:
  LambdaConfigurations:
    - Function: !Ref SomeLambdaArn
      Event: "s3:ObjectCreated:*"
      Filter:
        S3Key:
          Rules:
            - Name: prefix
              Value: zip

但是我不想修改存储桶的 CloudFormation 定义。与 SAM，lambda event triggers can be defined on the lambda :

  Events:
    BucketEvent1:
      Type: S3
      Properties:
        Bucket: Ref: Bucket1
        Events:
          - 's3:ObjectCreated:*'

但是有没有办法限制它只针对某些前缀触发？或者，有没有办法将 NotificationConfiguration 添加到现有存储桶？

Answer 1

如果我理解正确的话，您想在 lambda 中定义前缀而不是存储桶。

我就是这样做的，据我所知，它就像一个魅力

Resources:
  ConvertToParquet:
  Type: AWS::Serverless::Function 
  Properties:
  CodeUri: handler/convert_to_parquet
  MemorySize: 3008
  Timeout: 90
  Policies: 
    - AmazonS3FullAccess
  Events:
    SummaryCSVCreated:
      Type: S3
      Properties:
        Bucket: !Ref UploadBucket
        Events: s3:ObjectCreated:*
        Filter: 
          S3Key:
            Rules:
              - Name: suffix
                Value: '.txt'

  UploadBucket:
    Type: AWS::S3::Bucket