gistfile1.txt

# from koz, tweaked
class FixAcceptsBehaviourMiddleware
  def initialize(app, formats, logger = Rails.logger)
    @app     = app
    @formats = formats
    @logger  = logger
  end

  def call(env)
    current_accept_header = env["HTTP_ACCEPT"].to_s.split(",")
    if (@formats & current_accept_header).empty? && !env["HTTP_X_REQUESTED_WITH"]
      @logger.warn("Rewriting accepts header from '#{env["HTTP_ACCEPT"]}' to 'text/html'.") if @logger
      env["HTTP_ACCEPT"] = "text/html"
    end

    @app.call(env)
  end
end