Node.js fs.Dirent.isSocket()用法及代码示例

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

用法:

const dirent.isSocket()

参数：此方法不接受任何参数。

返回值：如果特定Dirent描述了Socket，则此方法返回true，否则返回false。

以下程序说明了Node.js中fs.dirent.isSocket()方法的使用：

范例1：
文件名：index.js

// Node.js program to demonstrate the  
// dirent.isSocket() method 
const fs = require('fs'); 
   
// Initiating asyn 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() mehtod 
  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

范例2：
文件名：index.js

// Node.js program to demonstrate the  
// dirent.isSocket() method 
const fs = require('fs'); 
    
// Initiating asyn function 
async function stop(path) { 
   
  let dir = null; 
    
  try { 
  
    // Creating and initiating directory's 
    // underlying resource handle 
    dir = await fs.promises.opendir( 
        new URL('file:///F:/java/')); 
  
    // Synchronously reading the dir's 
    // underlying resource handle 
    // using readSync() method 
    for(var i = 0; i <= 3; i ++ ) { 
        
      // Checking 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); 
    } 
  } finally { 
   
    if(dir) { 
  
      // Display the result 
      console.log("dir is closed successfully"); 
  
      // Synchronously closeSyncing the  
      // directory's underlying resource 
      // handle 
      const promise = dir.closeSync(); 
    } 
  } 
} 
    
// 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

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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 fs.Dirent.isSocket() Method。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。