This is done by representing the data in the most elementary of structures -- a byte stream also known as an octetstream.
这是通过用最基本的结构表示数据来完成的，最基本的结构就是字节流，也就是八位元流。
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In any case, this means that the Content-Type must be set when the content is uploaded, or you'll get the rather unpleasant content type binary/octet-stream set.