That ID is exposed as a header value, for your use.
该ID暴露为头信息值供你使用。
Well, I include what's called a header file as we'll call it.
好吧，我需要包含一个头文件。
This function will read the value of a HTTP header from the request as-is.
这个函数按原样从请求读取HTTP头的值。
Any empty header, such as Meta-Persistence above, must include a single space after the colon.
任何空白头部，比如上面提到的Meta -Persistence，必须在冒号之后包含一个空格。
Any empty header, such as Meta-Persistence above, must include a single space after the colon.
任何空白头部，比如上面提到的Meta -Persistence，必须在冒号之后包含一个空格。
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