def __getitem__(key):
    """Return HTTP request data

        Request data sre retrieved from one of:

        - Environment variables

          These variables include input headers, server data, and other
          request-related data.  The variable names are as <a
          href="http://hoohoo.ncsa.uiuc.edu/cgi/env.html">specified</a>
          in the <a
          href="http://hoohoo.ncsa.uiuc.edu/cgi/interface.html">CGI
          specification</a>

        - Cookies

          These are the cookie data, if present.

        Cookies are searched before environmental data.
        """
