使用API​​网关，AWS LAMBDA和S3从浏览器检索文件

Question

The setup is using S3 as a storage, API gateway for the rest endpoint and Lambda (Python) for get/fetch of file in S3.

I'm using Boto3 for the Lambda function (Python) to check if the file exists in S3, and I was able to download it but being stored in Lambda machine ("/tmp"). The API Gateway can trigger the lambda function already. Is there a way that once the lambda function is triggered then the download will happen in the browser?

Thanks!

Answer 1

Here is how we did it:

Check and Redirect:

API Gateway --> Lambda (return 302)

Deliver Content:

CloudFront --> S3

Check for S3 existence with Lambda returning a 302 to cloudfront. You can also return Signed URL from Lambda with a valid time to access the URL from CloudFront.

Hope it helps.