例如，我们可能会规定上传的大小限制或者可接受的文件类型，甚至我们可能会对文件名进行限制。

For example, we might specify how large uploads can be or what types of files are acceptable, or we could even impose restrictions on file names.

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为此，需要添加代码来处理上传，解析文件名，以及创建与上述模式相匹配的目录路径。

To do so, you need to add code to handle the upload, parse the file name, and create the directory paths to match the scheme above.

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如果您省略了目标文件名，那么curl将简单地重用上传文件的名称。

If you omit the target file name, curl simply reuses the name of the file being uploaded.

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