在服务器端，代码必须打开请求以确定调用/参数，然后执行调用，接收响应，重新封装响应，并将其返回给客户机。
On the server side, code must unwrap the request to determine the call/parameters, then execute the call, receive the response, rewrap the response, and return it to the client.
使用流时要遵循的另一条重要事项是需要首先正确地打开流并确定其长度。
The other important item to follow when using a stream is that you need to first open the stream as appropriate and determine its length.
于是，我打开了窗户，确定梳妆台上的东西都摆放整齐了，就走出房门，开始了新的“探险”。
Having opened my chamber window, and seen that I left all things straight and neat on the toilet-table, I ventured forth.
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