Node.js Stream 可读. readableEncoding 属性
原文:https://www . geesforgeks . org/node-js-stream-readable encoding-property/
可读流中的【readable.readableEncodin 属性用于获取所述可读流的属性编码。此外，您可以使用可读的. setEncoding()方法设置此属性。
语法:
readable.readableEncoding
返回值:返回程序中使用的编码。
下面的例子说明了在 Node.js 中可读. readableEncoding 属性的使用:
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=
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 _ encoding。
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