outgoingMessage.pipe()

覆盖继承自旧版的 Stream 类（http.OutgoingMessage 的父类）的 stream.pipe() 方法。

¥Overrides the stream.pipe() method inherited from the legacy Stream class which is the parent class of http.OutgoingMessage.

调用此方法将抛出 Error，因为 outgoingMessage 是只写流。

¥Calling this method will throw an Error because outgoingMessage is a write-only stream.