📜  Node.js Stream readable.readableEncoding 属性

📅  最后修改于: 2022-05-13 01:56:48.252000             🧑  作者: Mango

Node.js Stream readable.readableEncoding 属性

可读 Stream 中的readable.readableEncodin 属性用于获取声明的可读流的属性编码。此外,您可以使用 readable.setEncoding() 方法设置此属性。

句法:

readable.readableEncoding

返回值:返回程序中使用的编码。

下面的示例说明了 Node.js 中readable.readableEncoding 属性的使用:

示例 1:

// Node.js program to demonstrate the     
// readable.readableEncoding Property  
  
// Include fs module
const fs = require("fs");
  
// Constructing readable stream
const readable = fs.createReadStream("input.text");
  
// Setting the encoding 
readable.setEncoding("base64");
  
// Instructions for reading data
readable.on('readable', () => {
  let chunk;
  
  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read())) {
  
    // Displaying the chunk
    console.log(`read: ${chunk}`);
  }
});
  
// Calling readableEncoding property
readable.readableEncoding;

输出:

read: aGVs
read: bG8=

示例 2:

// Node.js program to demonstrate the     
// readable.readableEncoding Property  
  
// Include fs module
const fs = require("fs");
  
// Constructing readable stream
const readable = fs.createReadStream("input.text");
  
// Setting the encoding 
readable.setEncoding("hex");
  
// Instructions for reading data
readable.on('readable', () => {
  let chunk;
  
  // Using while loop and calling
  // read method with parameter
  while (null !== (chunk = readable.read())) {
  
    // Displaying the chunk
    console.log(`read: ${chunk}`);
  }
});
  
// Calling readableEncoding property
readable.readableEncoding;

输出:

read: 68656c6c6f

参考: https://nodejs.org/api/stream.html#stream_readable_readableencoding。