Feature request: first class support for data validation in Event Handler #4516
Description
Use case
As a customer I want to use Standard Schema-compatible libraries to validate requests and/or responses when using Event Handler.
When enabled, things like body and query parameters (at minimum) should be strongly typed in route handlers and possibly middleware functions.
Solution/User Experience
At this point is too early for us to suggest an API or a design beyond what already described in #3500.
As part of the issue pre-work we'll have to do a proof of concept and come up with a spec, before starting implementation.
When working on the design, we should make sure we take in account the design for the OpenAPI feature, since it's highly likely that schema generation will rely on Standard Schemas.
It's also unclear at this point if we can support Standard Schema-compatible libraries as a whole or if we'll have to narrow down to Zod only.
Alternative solutions
Acknowledgment
- This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
- Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET
Future readers
Please react with 👍 and your use case to help us understand customer demand.