Node.js readStream.isRaw用法及代码示例

readStream.isRaw属性是tty模块中ReadStream类的内置应用程序编程接口，用于检查当前是否将读取流对象配置为作为原始设备运行。

用法:

const status = ReadStream.isRaw;

返回值：当且仅当当前将读取流对象配置为作为原始设备运行时，此属性才返回true。

范例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

范例2： 文件名：index.js

// 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-v12.x/docs/api/tty.html#tty_readstream_israw

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注：本文由纯净天空筛选整理自RohitPrasad3大神的英文原创作品 Node.js readStream.isRaw Property。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。