gistfile1.txt

# A handler that logs the request method, resource, status code, and
# the time used to execute the next handler, to the given `IO`.
class Cove::Logger < HTTP::LogHandler
  
    # Initializes this handler to log to the given `IO`.
    def initialize(@io : IO = STDOUT)
    end
  
    def call(context)
      elapsed = Time.measure { call_next(context) }
      elapsed_text = elapsed_text(elapsed)
  
      @io.puts "    >> #{context.request.method}   #{context.request.resource}"
      @io.puts "             << #{context.response.status_code} (#{elapsed_text})"
      @io.puts " "
    rescue e
      @io.puts "    >> #{context.request.method}   #{context.request.resource} - Unhandled exception:"
      e.inspect_with_backtrace(@io)
      raise e
    end
  
    private def elapsed_text(elapsed)
      minutes = elapsed.total_minutes
      return "#{minutes.round(2)}m" if minutes >= 1
  
      seconds = elapsed.total_seconds
      return "#{seconds.round(2)}s" if seconds >= 1
  
      millis = elapsed.total_milliseconds
      return "#{millis.round(2)}ms" if millis >= 1
  
      "#{(millis * 1000).round(2)}µs"
    end
end