1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23

module Rack
  class SslBlock
    def initialize app, options = {}
      @app, @options = app, options
    end

    def call env
      if ssl_blocked_request? env, @options
        [403, {'Content-Type' => 'text/plain'}, "Forbidden"]
      else
        @app.call env
      end
    end

    private
      def ssl_blocked_request? env, options
        if env['HTTP_USER_AGENT'] && env['rack.url_scheme'] == 'https' && options.has_key?(:user_agents)
          options[:user_agents].each { |user_agent| return true if env['HTTP_USER_AGENT'].downcase.include? user_agent.downcase }
          false
        end
      end
  end
end