Node.js readStream.isRaw 属性
原文:https://www . geesforgeks . org/node-js-readstream-israw-property/
readStream.isRaw 属性是 tty 模块中类 ReadStream 的内置应用程序编程接口，用于检查读取流对象当前是否配置为作为原始设备运行。
语法:
const status = ReadStream.isRaw;
返回值:当且仅当读取流对象当前被配置为作为原始设备运行时，该属性返回 true。
示例 1: 文件名:index.js
// Node.js program to demonstrate the
// readStream.isRaw property
// Importing dgram module
var dgram = require('dgram');
// Creating and initializing client
// and server socket
var client = dgram.createSocket("udp4");
var server = dgram.createSocket("udp4");
// Catching the message event
server.on("message", function (msg) {
// Creating and initializing a
// ReadStream object
let ReadStream = process.stdin;
// Checking if it is configured or
// not by using isRaw() method
const status = ReadStream.isRaw;
// Displaying the result
if (status) {
process.stdout.write(msg
+ "configured" + "\n");
} else {
process.stdout.write(msg
+ "not configured" + "\n");
}
// Exiting process
process.exit();
})
// Binding server with port
.bind(1234, () => {
});
// Client sending message to server
client.send("It is ", 0, 7, 1234, "localhost");
输出:
It is not configured
示例 2: 文件名:
// Node.js program to demonstrate the
// readStream.isRaw property
// Creating and initializing a
// ReadStream object
let ReadStream = process.stdin;
// Setting the read stream Raw mode
// by using setRawMode() method
ReadStream.setRawMode(true);
// Checking if it is configured or not
// by using isRaw() method
const status = ReadStream.isRaw;
// Displaying the result
if(status) {
console.log("It is configured");
} else {
console.log("it is not configured");
}
使用以下命令运行 index.js 文件:
node index.js
输出:
It is configured
参考:https://nodejs . org/dist/latest-v 12 . x/docs/API/tty . html # tty _ readstream _ israw
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