> For the complete documentation index, see [llms.txt](https://easonwang.gitbook.io/class/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://easonwang.gitbook.io/class/stream-liu.md).

# stream(流)

HTTP server 的request 和 process.stdout均為其發展的實例

擁有以下幾種type

```
Readable - 可讀
Writable - 可寫
Duplex - 可同時讀寫
Transform - 可轉換讀或寫的格式後再輸出
```

一般讀寫有兩種方式

一種是全部先讀取到buffer緩衝區，也就是電腦的記憶體，之後再一次輸出

另一種是另一種是每讀入一小塊隨即將他輸出


---

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