======== AVANT =========
        # String like "abc" or "a\"bc" or just ""
        match_quoted_string = r"\"((?:[^\"]|\\\")*)\""

        # Regex matching one line
        regex  = r"^([^ ]+) " # Origin
        regex += r"([^ ]+) " # Host
        regex += r"([a-z]+|-) " # User
        regex += r"\[([^]]+)\] " # Date
        regex += r"\"(POST|GET|HEAD) ([^ ]+) HTTP/1\.[01]\" " # Method, Url
        regex += r"([0-9]{3}) ([0-9]+|-) " # Code, Size
        regex += match_quoted_string+" " # Referrer
        regex += match_quoted_string+"$" # Browser string

=============== APRES ===========

        # String like "abc" or "a\"bc" or just ""
        match_quoted_string = r"\"((?:[^\"]|\\\")*)\""

        replace = {
            "origin": r"([^ ]+)",
            "host": r"([^ ]+)",
            "user": r"([a-z]+|-)",
            "date": r"\[([^]]+)\]",
            "request": r"\"(POST|GET|HEAD) ([^ ]+) HTTP/1\.[01]\"",
            "answer": r"([0-9]{3}) ([0-9]+|-)",
            "referrer": match_quoted_string,
            "browser": match_quoted_string,
        }
        
        regex = "^%(origin)s %(host)s %(user)s %(date)s %(request)s %(answer)s %(referrer)s %(browser)s$" % replace