Node.js Stream 可读. setEncoding()方法
原文:https://www . geesforgeks . org/node-js-stream-readable-set encoding-method/
可读流中的可读. setEncoding()方法用于设置读取数据的编码。
语法:
readable.setEncoding( encoding )
参数:该方法接受保存编码类型的单参数编码。
返回值:以编码形式返回数据。
以下示例说明了在 Node.js 中使用可读的. setEncoding()方法:
例 1:
// Node.js program to demonstrate the
// readable.setEncoding() method
// Include fs module
const fs = require('fs');
// Create readable stream
const readable = fs.createReadStream("input.txt");
// Calling setEncoding method
readable.setEncoding('hex');
// Handling data event
readable.on('data', (chunk) => {
console.log(`${chunk}`);
});
// Displays that program
// is ended
console.log("Program ends!!");
输出:
Program ends!!
48656c6c6f
例 2:
// Node.js program to demonstrate the
// readable.setEncoding() method
// Include fs module
const fs = require('fs');
// Create readable stream
const readable = fs.createReadStream("input.txt");
// Calling setEncoding method
readable.setEncoding('base64');
// Handling data event
readable.on('data', (chunk) => {
console.log(`${chunk}`);
});
// Displays that program
// is ended
console.log("Program ends!!");
输出:
Program ends!!
SGVs
bG8=
参考:https://nodejs . org/API/stream . html # stream _ readable _ setencoding _ encoding
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