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lib/plug/accesslog/default_formatter/request_cookie.ex
defmodule Plug.AccessLog.DefaultFormatter.RequestCookie do
@moduledoc """
Fetches a cookie sent by the client for logging.
"""
import Plug.Conn
@doc """
Formats the log output.
"""
@spec format(Plug.Conn.t(), String.t()) :: iodata
def format(conn, cookie) do
case fetch_cookies(conn) do
%{cookies: %{^cookie => value}} -> value
_ -> "-"
end
end
end