Node.JS loops to delete all files in non-empty folders and subdirectories-JS Tutorial-php.cn

Node.JS loops to delete all files in non-empty folders and subdirectories

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Release： 2018-05-31 10:23:10

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This article mainly introduces the example code of Node.JS cyclically deleting non-empty folders and all files in subdirectories and node.js recursively deleting non-empty folders. Friends who need it can refer to it

Recently, I want to implement a function to cycle folders. The folder may not be empty, but may also contain subfolders and files. I have found some existing libraries on the Internet, but none of them provide deletion progress. So I wrote one myself.

var fs  = require(&#39;fs&#39;)
var path = require(&#39;path&#39;)

var remove = function(tarPath, cb, removeStates) {
 if (!removeStates) {
  removeStates = { cur: 0, all: 0 }
 } else {
  if (!removeStates.cur) {
   removeStates.cur = 0;
  }
  if (!removeStates.all) {
   removeStates.all = 0;
  }
 }
 removeStates.all++;
 fs.stat(tarPath, function(err, states) {
  removeStates.cur++;
  if (err) {
   cb && cb()
   return
  }
  if (states.isDirectory()) {
   fs.readdir(tarPath, function(err, files) {
    if (err) {
     console.log(err)
     cb && cb()
     return
    }
    if (files.length < 1) {
     fs.rmdir(tarPath, cb)
     return
    }
    var count  = 0
    var checkEnd = function() {
     if (++count == files.length) {
      fs.rmdir(tarPath, cb)
     }
    }
    files.forEach(function(file) {
     remove(path.join(tarPath, file), checkEnd, removeStates)
    })
   })
  } else {
   fs.unlink(tarPath, function(err) {
    if (err) {
     console.log(err)
    }
    cb && cb()
    return
   })
  }
 })
 return removeStates
}

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It’s very simple to use

var states = remove(&#39;./testdir&#39;, function() {
  console.log(&#39;delete complete&#39;)
  clearInterval(checkTimer)
});
var checkTimer = setInterval(function() {
  console.log(states)
}, 500);

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Output result:

node remove.js
{ cur: 546, all: 546 }
delete complete

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PS: Let’s look at NodeJs recursively deleting non-empty folders

This article is used for the first time fs.unlink() reports the error "Error: EPERM: operation not permitted, unlink" when deleting a folder. This is because fs.unlink() can only delete files.

fs.rmdir()or fs.rmdirSync()User deletes empty folders, fs.unlink() or fs.unlinkSync() is used to delete files , so deleting non-empty folders requires recursion.

function deleteFolderRecursive(path) {
  if( fs.existsSync(path) ) {
    fs.readdirSync(path).forEach(function(file) {
      var curPath = path + "/" + file;
      if(fs.statSync(curPath).isDirectory()) { // recurse
        deleteFolderRecursive(curPath);
      } else { // delete file
        fs.unlinkSync(curPath);
      }
    });
    fs.rmdirSync(path);
  }
};

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The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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