There are (de facto) standard web server interfaces for programming languages e.g. WSGI for Python, Rack for Ruby. Is there the equivalent thing for Haskell? I found two trials, Hack and HSGI, but am not sure which of these (or another one) is more popular in Haskell land.
Waiting for Haskell gurus’ advices!
The de facto standard for Haskell is the WAI (Web Application Interface). It is supported by the popular Haskell web framework Yesod, and there are several packages built around this interface available on Hackage.