call

# File actionpack/lib/action_dispatch/middleware/static.rb, line 110
    def call(env)
      case env['REQUEST_METHOD']
      when 'GET', 'HEAD'
        path = env['PATH_INFO'].chomp('/')
        if match = @file_handler.match?(path)
          env["PATH_INFO"] = match
          return @file_handler.call(env)
        end
      end

      @app.call(env)
    end