📜  Node.js fs.Dirent.isSocket() 方法

📅  最后修改于: 2022-05-13 01:56:48.469000             🧑  作者: Mango

Node.js fs.Dirent.isSocket() 方法

fs.Dirent.isSocket()方法是文件系统模块中fs.Dirent类的内置应用程序编程接口,用于检查特定 dirent 是否描述了 Socket。
句法:

const dirent.isSocket()

参数:此方法不接受任何参数。
返回值:如果特定的dirent描述了一个Socket,则此方法返回true,否则返回false。
下面的程序说明了 Node.js 中fs.dirent.isSocket()方法的使用:
示例 1:
文件名:index.js

javascript
// Node.js program to demonstrate the
// dirent.isSocket() method
const fs = require('fs');
  
// Initiating async function
async function stop(path) {
  
  // Creating and initiating dir's
  // underlying resource handle
  const dir = await
        fs.promises.opendir(path);
    
  // Synchronously reading the dir's
  // underlying resource handle
  // using readSync() method
  for(var i = 0; i <= 3; i ++ ) {
  
    // Checking if the particular
    // dirent is Socket or not
    // by using isSocket() method
    const value = (
        dir.readSync()).isSocket();
  
    // Display the result
    console.log(dir.readSync());
    console.log(value);
  }
}
  
// Catching error
stop('./').catch(console.error);


javascript
// Node.js program to demonstrate the
// dirent.isSocket() method
const fs = require('fs');
  
// Initiating async function
async function stop(path) {
  
  // Creating and initiating dir's
  // underlying resource handle
  const dir = await
        fs.promises.opendir(path);
    
  // Synchronously reading the dir's
  // underlying resource handle
  // using readSync() method
  for(var i = 0; i <= 3; i ++ ) {
  
    // Checking if the particular
    // dirent is Socket or not
    // by using isSocket() method
    const value = (
        dir.readSync()).isSocket();
  
    // Display the result
    console.log(dir.readSync());
    console.log(value);
  }
}
  
// Catching error
stop('./').catch(console.error);


使用以下命令运行index.js文件:

node index.js

输出:

Dirent { name: 'cert.cer', [Symbol(type)]: 1 }
false
Dirent { name: 'certificate1.cer', [Symbol(type)]: 1 }
false
Dirent { name: 'filename.txt', [Symbol(type)]: 1 }
false
Dirent { name: 'GFG.java', [Symbol(type)]: 1 }
false

示例 2:
文件名:index.js

javascript

// Node.js program to demonstrate the
// dirent.isSocket() method
const fs = require('fs');
  
// Initiating async function
async function stop(path) {
  
  // Creating and initiating dir's
  // underlying resource handle
  const dir = await
        fs.promises.opendir(path);
    
  // Synchronously reading the dir's
  // underlying resource handle
  // using readSync() method
  for(var i = 0; i <= 3; i ++ ) {
  
    // Checking if the particular
    // dirent is Socket or not
    // by using isSocket() method
    const value = (
        dir.readSync()).isSocket();
  
    // Display the result
    console.log(dir.readSync());
    console.log(value);
  }
}
  
// Catching error
stop('./').catch(console.error);

使用以下命令运行index.js文件:

node index.js

输出:

Dirent { name: 'cert.cer', [Symbol(type)]: 1 }
false
Dirent { name: 'certificate1.cer', [Symbol(type)]: 1 }
false
Dirent { name: 'features', [Symbol(type)]: 2 }
false
Dirent { name: 'GFG.class', [Symbol(type)]: 1 }
false
dir is closed successfully

参考: https://nodejs.org/dist/latest-v12.x/docs/api/fs.html#fs_dirent_issocket