expatreader.py 文件源码

def external_entity_ref(self, context, base, sysid, pubid):
        if not self._external_ges:
            return 1

        source = self._ent_handler.resolveEntity(pubid, sysid)
        source = saxutils.prepare_input_source(source,
                                               self._source.getSystemId() or
                                               "")

        self._entity_stack.append((self._parser, self._source))
        self._parser = self._parser.ExternalEntityParserCreate(context)
        self._source = source

        try:
            xmlreader.IncrementalParser.parse(self, source)
        except:
            return 0  # FIXME: save error info here?

        (self._parser, self._source) = self._entity_stack[-1]
        del self._entity_stack[-1]
        return 1