pop3.py 文件源码

def _sendMessageContent(self, i, fpWrapper, successResponse):
        d = self._getMessageFile(i)
        def cbMessageFile(info):
            if info is None:
                # Some error occurred - a failure response has been sent
                # already, just give up.
                return

            self._highest = max(self._highest, int(i))
            resp, fp = info
            fp = fpWrapper(fp)
            self.successResponse(successResponse(resp))
            s = basic.FileSender()
            d = s.beginFileTransfer(fp, self.transport, self.transformChunk)

            def cbFileTransfer(lastsent):
                if lastsent != '\n':
                    line = '\r\n.'
                else:
                    line = '.'
                self.sendLine(line)

            def ebFileTransfer(err):
                self.transport.loseConnection()
                log.msg("Unexpected error in _sendMessageContent:")
                log.err(err)

            d.addCallback(cbFileTransfer)
            d.addErrback(ebFileTransfer)
            return d
        return self._longOperation(d.addCallback(cbMessageFile))