方法分别打开和关闭输入管道。
listen和close方法分别打开和关闭输入管道。
The listen and close methods open and close an input pipe, respectively.
如果使用处理管道,那么关键就是建立管道输入和输出的契约,无论数据是否转义。
If you're using processing pipelines, then the key is in establishing contracts for pipeline inputs and outputs as to whether the data is escaped.
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