options_proc

# File actionpack/lib/action_dispatch/routing/redirection.rb, line 62
        def options_proc(options)
          proc do |params, request|
            path = if options[:path].nil?
              request.path
            elsif params.empty? || !options[:path].match(/%\{\w*\}/)
              options.delete(:path)
            else
              (options.delete(:path) % params)
            end

            default_options = {
              :protocol => request.protocol,
              :host => request.host,
              :port => request.optional_port,
              :path => path,
              :params => request.query_parameters
            }

            ActionDispatch::Http::URL.url_for(options.reverse_merge(default_options))
          end
        end