How does Google implement "Undo" in GMail?

Question

I've read about how to implement Undo in web applications. There are several drawbacks to this light-weight approach on the client-side.

Does anyone know how Google implements "Undo" in their apps, e.g. GMail? Is it a client-side implementation like Aza Raskin's solution? Is it some kind of "Delete" record in a DB that gets removed again? Or something entirely different?

Of course, it depends. Sometimes a client-side solution is enough, but most of the time it's server-side: a database entry is only marked as deleted, not physically removed. — Oleh Prypin, Aug 14 '12 at 11:47
I know! That's why I wanted to know: How does Google do it in GMail? — awendt, Aug 14 '12 at 12:48

score 1 · Answer 1 · answered Mar 18 '13 at 12:18

1

Blog below explain how it is done using python. Credit to Alexandre Bourget for putting it up

http://blog.abourget.net/2010/2/20/gmail-undo-cancel-feature-introducing-python-webundo/

answered Mar 18 '13 at 12:18

krutin

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score 0 · Answer 2 · answered Mar 08 '13 at 17:03

0

They probably delay the actual sending of the email for a set amount of time where you have a chance to cancel it.

answered Mar 08 '13 at 17:03

timc

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How does Google implement "Undo" in GMail?

2 Answers2