You have to specify ACL as public-read in the request headers:

'x-amz-acl': 'public-read'

I am with same problem here. anyone on dg could help on this?

Same problem here. Digital ocean any update about this?

Same problem here. Using golang with Minio, but cannot set to public-read for file uploaded.
Any update?

if you are using golang, please refer to this link:
https://www.digitalocean.com/community/questions/how-to-use-digitalocean-spaces-with-the-aws-s3-sdks

I have the same proplem, ,,,,,,
Did you know how to make all the bucket public

i'm using https://github.com/minio/minio-go, here is what i did.

    endpoint := "sgp1.digitaloceanspaces.com"
    accessKeyID := "access-key"
    secretAccessKey := "secret-access-key"
    useSSL := true

    // Initialize minio client object.
    minioClient, err := minio.New(endpoint, accessKeyID, secretAccessKey, useSSL)
    if err != nil {
        log.Fatalln(err)
    }

    // Upload the file
    bucketName := "indonesia"
    newImageName := uuid.NewV4()
    objectName := "indonesia.jpg"
        fileObject := bytes.NewReader(body)
    contentLength := r.ContentLength
    contentType := r.Header.Get("Content-type")
    cacheControl := "max-age=31536000"
       // make it public
    userMetaData := map[string]string{"x-amz-acl": "public-read"}

    n, err := minioClient.PutObject(bucketName, objectName, fileObject, contentLength, minio.PutObjectOptions{ContentType: contentType, CacheControl: cacheControl, UserMetadata: userMetaData})
    if err != nil {
        log.Fatalln(err)
    }

You can take a look at my Github repo to get a easy solution:

https://github.com/ilovelili/digital-ocean-client