To make sure that not only did the server finish with a request but that it also reported an OK status, add an additional check in your callback function as shown in Listing 7.

为了确保服务器不但完成了一个请求，而且还报告了一个 OK 状态，请在您的回调函数中添加另外一个检查功能，如 清单 7 所示。

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In some cases, a worm may perform an additional function outside of simple replication: it may serve as a deployment mechanism for an enclosed payload.

在某些情况下，除简单的复制功能外，蠕虫还可执行其他功能：作为一个封装的负载的部署机制。

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As an additional feature, the function also tests whether the global position of the new row already appears in the parent path.

作为附加的功能，该函数还测试新行的全局位置是否已经出现在父路径中。

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