Access to cloud storage from client URL - google-cloud-storage

Question

From a Google cloud application, I need to open a file located in my project’s cloud storage. I tried to use a URL of the following form to access the file but I get the error below:
http://storage.googleapis.com/my-bucket/my-file
Error: Access denied. Anonymous caller does not have storage objects
www.googleapis.com/upload/storage/v1/b/http://my_appl//my-bucket/my-file
Error 404
www.googleapis.com/storage/v1/b/my-bucket/my-file
Error 404
https://www.googleapis.com/storage/v1/b/my-bucket/o/my-file
"code": 401,
"message": "Anonymous caller does not have storage.objects.get access to my-bucket/my-file
https://www.googleapis.com/storage/v1/b/my-bucket/o/my-file/place?key=my-key
Not found
Am I composing the URL incorrectly?

Answer 1

http://storage.googleapis.com/my-bucket/my-file
This one is fine. However, unless an object is publicly readable, you'll need to authorize the request, which means either including an "Authorization" header in the request with appropriate credentials or signing the URL with the private key of a service account.
https://www.googleapis.com/download/storage/v1/b/my-bucket/o/my-file?key=my-key&alt=media
This is also okay, but an API key does not provide authentication. You'll still need an Authorization header unless the object is publicly viewable.