Flash uploaders, Rails, cookie based sessions and CSRF: Rack Middleware to the rescue!
It is one of life’s strange coincidences that in the week where Rack middleware was brought firmly into the spotlight in Railsland thanks to the introduction of Metal and the continuing transition of Rails to a Rack application that I finally had a need to write some middleware of my own. Up until now I’ve had a rough understanding of how Rack works and how middleware can used to provide customised processing in a web request but I haven’t actually needed to use it for anything.
