'Exports the upper text.'

def _export(self, widg, combo):

    opc = combo.get_active()
    func = self._exporters[opc][1]
    try:
        exported_request = func(self.http_request.get_text())
    except BaseFrameworkException as w3:
        error_msg = str(w3)
        self.exported_text.set_text(error_msg)
    else:
        self.exported_text.set_text(exported_request)
