Node.js Stream 可读. destroy()方法
原文:https://www . geesforgeks . org/node-js-stream-readable-destroy-method/
readable.destroy()方法是 Stream 模块的内置应用编程接口，用于销毁流。
语法:
readable.destroy( error )
参数:该方法接受单参数错误，该参数是可选的，在处理错误事件时会发出错误。
返回值:如果使用此方法，则流被破坏，如果错误参数作为参数传递，则它发出错误事件。
以下示例说明了在 Node.js 中使用 readable.destroy()方法:
例 1:
// Node.js program to demonstrate the
// readable.destroy() method
// Include fs module
const fs = require("fs");
// Constructing readable stream
const readable = fs.createReadStream("input.txt");
// Instructions for reading data
readable.on('readable', () => {
let chunk;
// Using while loop and calling
// read method with parameter
while (null !== (chunk = readable.read(1))) {
// Displaying the chunk
console.log(`read: ${chunk}`);
}
});
// Calling destroy method
readable.destroy();
// Displays that the stream is
// destroyed
console.log("Stream destroyed");
输出:
Stream destroyed
例 2:
// Node.js program to demonstrate the
// readable.destroy() method
// Include fs module
const fs = require("fs");
// Constructing readable stream
const readable = fs.createReadStream("input.txt");
// 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}`);
}
});
// Handling error event
readable.on('error', err => {
console.log(err);
});
// Calling destroy method
// with parameter
readable.destroy(['error']);
// Displays that the stream is
// destroyed
console.log("Stream destroyed");
输出:
Stream destroyed
[ 'error' ]
在上面的示例中，发出了错误事件。
参考:https://nodejs . org/API/stream . html # stream _ readable _ destroy _ error
版权属于：月萌API www.moonapi.com，转载请注明出处
