title: Standard web server interface equivalent to WSGI/Rack for Haskell
body: <p>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.</p>
  
  <p>Waiting for Haskell gurus’ advices!</p>