Note

Invalid according to Policy: Extra input fields: content-type S3 Presigned URL

Oct 21, 2022

If you receive the following error when trying to store an object in Amazon S3: AccessDenied Invalid according to Policy: Extra input fields: content-type SomeCrazyString AnotherCrazyString I...

If you receive the following error when trying to store an object in Amazon S3: AccessDenied Invalid according to Policy: Extra input fields: content-type SomeCrazyString AnotherCrazyString It's because the policy used to generate the pre-signed POST request did not have content-type as one of the permissible fields. Set it like so: [["starts-with", "$Content-Type", ""]] An empty string tells S3 to allow any content-type, but you can certainly be more specific.

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Jun 30, 2023

Stripe Missing required param: items

You may see this error when calling stripe.Subscription.create(): Missing required param: items It’s a misleading message because it implies that the entire items param is missing, but you’ve probably set one of the value...

May 27, 2023

Determining if App is Running in AWS AppRunner

This does not seem to be documented anywhere. If you need to tell, from within your AWS AppRunner application, whether it’s running locally or in AWS you can check the environment variable AWS_EXECUTION_ENV. The value for the environment...

Apr 06, 2023

AWS AppRunner Pending certificate DNS validation

I had an AppRunner instance with a custom domain that was stuck on "Pending certificate DNS validation” as it was trying to validate the ACM certificates. Turns out that the UI to copy and paste the DNS validation entries can lead you a...