Values in request body.

def data(self):
        """ Values in request body.
        """
        if self._data is None:
            self._data = self.arg_container()

            if isinstance(self.fieldstorage.value, list):
                for k in self.fieldstorage.keys():
                    fname = self.fieldstorage[k].filename
                    if fname:
                        self._data[k] = (fname, self.fieldstorage[k].file)

                    else:
                        self._data[k] = self.fieldstorage.getfirst(k)

        return self._data