I have files in digital ocean spaces on private mode. I generate a temporary url using method describe here https://www.digitalocean.com/docs/spaces/resources/s3-sdk-examples/

The code works for any files without spaces. For file with spaces, in my database I save it like this “this%20is%20an%20image.png”. If I send the key to the the signed url the result changed the original name to “this%2520is%2520an%2520image.png”.