rackup dav4rack above session middleware

rackup.ru

# This file is used by Rack-based servers to start the application.

require ::File.expand_path('../config/environment',  __FILE__)

WEBDAV_MOUNT_PATH = '/webdav'

app = Rack::Builder.new {
  map WEBDAV_MOUNT_PATH + '/' do
    run DAV4Rack::Handler.new(
      :root => Rails.root.to_s,
      :root_uri_path => WEBDAV_MOUNT_PATH,
      :resource_class => ::DAV4Rack::FileResource
    )
  end

  map '/' do
    use DAV4Rack::Interceptor, :mappings => {
      WEBDAV_MOUNT_PATH + '/' => {
        :resource_class => ::DAV4Rack::FileResource
      },
    }
    run RailsDav::Application
  end
}.to_app

run app