These tutorials walk through the process of building a file sharing/hosting service using the Yesod framework.
Building a File Hosting Service in Yesod
As of March 2020, School of Haskell has been switched to read-only mode.
Building a File Hosting Service in Yesod - Part 5 14 Jun 2015Michael Steele
In this entry we allow uploaded files to persist across application restarts.