[FIXED] How to list all files from a specific S3 Bucket?

Issue

I am using AWS S3 bucket for my project where I am uploading images and listing images using APIs, which is working pretty fine.

Now I want to list all files of a specific S3 bucket/folder (listing of objects of the specific bucket).

Here is the screenshot of my S3 bucket:

I tried to give bucket names like

1. wevieu/development/user_default/
2. wevieu/development/user_default
3. s3://wevieu/development/user_default/

etc. but nothing helped me.

Most of the time I am getting this error or any other error with 400 response:

The specified key does not exist. (Service: Amazon S3; Status Code: 404; Error Code: NoSuchKey;

I tried 1 , 2, 3 solutions but didn't get help from any of this.

Help me if anyone have done this before successfully.

Note: I am using this SDK version com.amazonaws:aws-java-sdk-s3:1.11.423

Solution

Ok. So I got the solution.

You need to add the permissions before listing objects in your S3. If permissions are missing then your code will give you errors.

The code that I did use is this, which was not working before adding permission.

After adding permissions, I am able to list all objects.

objectListing = s3client.listObjects("wevieu", "development/user_default");
        if (objectListing != null) {
            List<S3ObjectSummary> s3ObjectSummariesList = objectListing.getObjectSummaries();
            if (!s3ObjectSummariesList.isEmpty()) {
                for (S3ObjectSummary objectSummary : s3ObjectSummariesList) {
                    System.out.println("file name:"+objectSummary.getKey());
                }
            }
        }

Answered By - Kishan Solanki
Answer Checked By - Cary Denson (JavaFixing Admin)