Utility monad stack to be used in servant
Instead of running in IO, you can use servant with the monad called "Diener". It has
- logging functionality
- a reader (among others: for database connections)
- its own errors
- convenience function for lifts
A full example web-server application, using Sqlite3 and logging
A full example web-server application, using MongoDB.
Check out the handler.hs to see how you can use type-classes to fine-tune effects.