readable.wrap(stream)

• stream <Stream> “旧式”的可读流
• 返回: <this>

在 Node.js 0.10 之前，流没有实现当前定义的整个 stream 模块 API。 （有关更多信息，请参阅兼容性。）

当使用旧的 Node.js 库，它触发 'data' 事件并且有一个 stream.pause() 方法只是建议性的，readable.wrap() 方法可用于创建一个使用旧流作为其数据源的 Readable 流。

很少需要使用 readable.wrap()，但提供该方法是为了方便与较旧的 Node.js 应用程序和库进行交互。

const { OldReader } = require('./old-api-module.js');
const { Readable } = require('stream');
const oreader = new OldReader();
const myReader = new Readable().wrap(oreader);

myReader.on('readable', () => {
  myReader.read(); // 等等。
});

• stream <Stream> An "old style" readable stream
• Returns: <this>

Prior to Node.js 0.10, streams did not implement the entire stream module API as it is currently defined. (See Compatibility for more information.)

When using an older Node.js library that emits 'data' events and has a stream.pause() method that is advisory only, the readable.wrap() method can be used to create a Readable stream that uses the old stream as its data source.

It will rarely be necessary to use readable.wrap() but the method has been provided as a convenience for interacting with older Node.js applications and libraries.

const { OldReader } = require('./old-api-module.js');
const { Readable } = require('stream');
const oreader = new OldReader();
const myReader = new Readable().wrap(oreader);

myReader.on('readable', () => {
  myReader.read(); // etc.
});