The interface input and output has to be HTTPBytes type (one of the two data types created in the previous step) in order to treat the pay load as binary data.
界面的输入和输出的类型必须为HTTPBytes(前面小节创建的数据类型之一)，这样才能将负载作为二进制数据处理。
The interface input and output has to be HTTPBytes type (one of the two data types created in the previous step) in order to treat the pay load as binary data.
界面的输入和输出的类型必须为HTTPBytes(前面小节创建的数据类型之一)，这样才能将负载作为二进制数据处理。
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