error.cr

require "kemal"
class AuthorizationHandler < HTTP::Handler        
  ACCEPT = "application/vnd.api.v1+json"

  def call(env)
    if env.request.headers["Accept"] != ACCEPT
      env.response.status_code = 401
    end
    call_next(env)
  end
end

Kemal.config.add_handler(AuthorizationHandler.new)
error 401 do
  {"error" => "Unauthorized"}.to_json
end

get "/" { {"success" => "YAY"}.to_json }
Kemal.run