AWS - Serverless Architecture
You want a Lambda function to process only PNG files uploaded to an S3 bucket. How should you configure the S3 event trigger to achieve this?
You want a Lambda function to process only PNG files uploaded to an S3 bucket. How should you configure the S3 event trigger to achieve this?
hard📝 Application Q15 of 15
Step-by-Step Solution
Solution:
Step 1: Use event type for object creation
Use 's3:ObjectCreated:*' to capture all create events including uploads.Step 2: Apply suffix filter for '.png'
Configure the bucket notification with a filter to trigger Lambda only for files ending with '.png'.Final Answer:
Set the event type to 's3:ObjectCreated:*' and add a filter with suffix '.png' in the bucket notification configuration. -> Option DQuick Check:
Use event filters to limit Lambda triggers by file type [OK]
Quick Trick: Use suffix filter '.png' in S3 event trigger for file type filtering [OK]
Common Mistakes:
- Using ObjectRemoved event instead of ObjectCreated
- Relying only on Lambda code filtering without event filters
- Using prefix filter with file extension instead of suffix
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