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Editorial Team
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Asked: 2026-05-29T23:21:33+00:00

I have a GAE application with a database of users. When one of the

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I have a GAE application with a database of users.

When one of the user tries to download, say, file myapplication.appspot.com/somefile.jpg, I would:

  1. check on the GAE database whether he is allowed to
  2. if he is allowed, redirect him to a cloud storage bucket of mine from where he can download somefile.jpg
  3. if he is not allowed, return him a 404 error code, and do some magic so that directly trying to download somefile.jpg from the cloud storage bucket does not complete.

Now what’s unclear to me is how to control access to somefile.jpg. How can I restrict the download to this scope of users?

PS: using something else than Google Storage is not an option (for those of you guys who thought about blobstore).

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1 Answer

  1. Editorial Team

    You don’t need to restrict access on a per user basic you can restrict access on a per application (Google App Engine App) basis.
    Every application has a service account, what you can do is set an ACL on the bucket to allow access to the application service account.

    Now all you need to write an handler that would access Google Storage and return the data to the user.

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