sinatra_conditions.rb

# so everyone uses something like this for request-level authentication in Sinatra

class TestApp < Sinatra::Application
  get "/path" do
    require_authentication!
    ...
  end
end

# and complain about how sinatra doesn't support per-route before filters like um, "other frameworks"
# well, you can do this to decouple the auth from the route itself:

class TestApp < Sinatra::Application
  condition { require_authentication! }
  get "/path" do
    ...
  end
end

# and if you feel it needs more DSL-y magic, then:

module BeforeFilters
  def before_filter(method)
    condition { send method }
  end
end

class TestApp < Sinatra::Application
  register BeforeFilters

  before_filter :require_authentication!
  get "/path" do
    ...
  end
end

# Though I don't think the extra DSL is needed, but to each its own :)