[Grzegorz Derebecki]

i suggest this solution:

rack_input = StringIO.new($stdin.read.to_s)
        env.update(
          "rack.version" => [1,0],
          "rack.input" => rack_input,
          "rack.errors" => $stderr,
          "rack.multithread" => false,
          "rack.multiprocess" => true,
          "rack.run_once" => false,
          "rack.url_scheme" => ["yes", "on", "1"].include?(ENV["HTTPS"]) ? "https" : "http"
        )