filetransfer.py 文件源码

def packet_READ(self, data):
        requestId = data[:4]
        data = data[4:]
        handle, data = getNS(data)
        (offset, length), data = struct.unpack('!QL', data[:12]), data[12:]
        assert data == '', 'still have data in READ: %s' % repr(data)
        if handle not in self.openFiles:
            self._ebRead(failure.Failure(KeyError()), requestId)
        else:
            fileObj = self.openFiles[handle]
            d = defer.maybeDeferred(fileObj.readChunk, offset, length)
            d.addCallback(self._cbRead, requestId)
            d.addErrback(self._ebStatus, requestId, "read failed")