Скачать или смотреть Service-Engine: Middleware & Redactions

README:
https://github.com/sudowing/service-e...
https://github.com/sudowing/service-e...

Sometimes it can be useful to intercept an inbound query before submitting for processing. To accomplish this, this framework supports middleware -- which are a set of functions that take as input a query object and returns a new query object (that will still pass the validation).

This can be useful for appending submitted queries with additional search criteria deriving from the request on-the-fly -- like adding a partition key to a query or by appending a max bbox for a query using a geo point & zoom level.

Additionally, in some situations it may be useful to redact columns from database records -- while still maintaining the ability to support querying that dimension.

This feature works best when paired with a middleware function that would to derive query conditions from a submitted query on the fly.