How can I delete folder on S3 with Node.js?

Yes, I know. There is no folder concept on S3 storage. but I really want to delete a specific folder from S3 with Node.js. I tried two solutions, but both didn't work. My code is below:

Solution 1

Deleting folder directly.

var key='level/folder1/folder2/';
var strReturn;
        var params = {Bucket: MyBucket};
        var s3 = new AWS.S3(params);
        s3.client.listObjects({
            Bucket: MyBucket,
            Key: key
        }, function (err, data) {
            if(err){
                strReturn="{\"status\":\"1\"}";
                
            }else{
                strReturn=+"{\"status\":\"0\"}";
            }
            res.send(returnJson);
            console.log('error:'+err+' data:'+JSON.stringify(data));
        });

Actually, I have a lot of files under folder2. I can delete single file from folder2 if I define key like this: var key='level/folder1/folder2/file1.txt', but it didn't work when I deleted a folder (key='level/folder1/folder2/').

Solution 2

I tried to set expiration to an object when I uploaded this file or folder to s3. code is below:

s3.client.putObject({
                Bucket: Camera_Bucket,
                Key: key,
                            ACL:'public-read', 
                Expires: 60 
            }

But it didn't either. After finishing uploading, I checked the properties of that file. It showed there was nothing value for expiry date:

Expiry Date:none
Expiration Rule:N/A

How can I delete folder on S3 with Node.js?

You can use aws-sdk module for deleting folder. Because you can only delete a folder when it is empty, you should first delete the files in it. I'm doing it like this :

function emptyBucket(bucketName,callback){
  var params = {
    Bucket: bucketName,
    Prefix: 'folder/'
  };

  s3.listObjects(params, function(err, data) {
    if (err) return callback(err);

    if (data.Contents.length == 0) callback();

    params = {Bucket: bucketName};
    params.Delete = {Objects:[]};
    
    data.Contents.forEach(function(content) {
      params.Delete.Objects.push({Key: content.Key});
    });

    s3.deleteObjects(params, function(err, data) {
      if (err) return callback(err);
      if (data.IsTruncated) {
        emptyBucket(bucketName, callback);
      } else {
        callback();
      }
    });
  });
}