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plug_accesslog

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Plug for writing access logs

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plug_accesslog lib plug accesslog default_formatter response_header.ex
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lib/plug/accesslog/default_formatter/response_header.ex 

defmodule Plug.AccessLog.DefaultFormatter.ResponseHeader do

  @moduledoc """

  Fetches a response header for logging.

  """



  import Plug.Conn



  @doc """

  Appends to log output.

  """

  @spec append(String.t, Plug.Conn.t, String.t) :: String.t

  def append(message, conn, header) do

    case get_resp_header(conn, header |> String.downcase) do

      [ value ] -> message <> value

      _         -> message <> "-"

    end

  end

end