Is it possible to run code from Firebase Storage Security rules to delete files after 24hours

Question

If I were to build a snapchat equivalent mobile app, how could I use the Firebase Storage security rules to delete an image after 24 hours?

I didn't think it was possible but it was briefly mentioned by a Firebase employee in this Firebase video

score 3 · Accepted Answer · edited May 23 '17 at 12:34

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There is no way to automatically delete files (or perform any other action) from your security rules. What you can do is make the files (or node in the database) inaccessible after a certain time.

See this answer for an example of this: Firebase security rule to prevent customers from circumventing usage tracking

There's a good example of this in the Firebase Storage reference documentation:

allow read: if request.time < resource.createdAt + duration.value(1, "h");

Hat tip to Mike McDonald for pointing that one out. :-)

edited May 23 '17 at 12:34

Community

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answered Feb 13 '17 at 18:43

Frank van Puffelen

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@puf thanks. can I run a script on my own server to delete files in firebase storage after 24 hours? – Edward Feb 13 '17 at 19:17
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Certainly. You'll want to use the gcloud SDKs for that, since Firebase doesn't come with its own server-side SDKs. – Frank van Puffelen Feb 13 '17 at 19:23

Is it possible to run code from Firebase Storage Security rules to delete files after 24hours

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