What does _ah mean in Google App Engine?

Question

Does the _ah mean anything in Google App Engine?

I'm not looking to find out what it's used for or where is it located and how it works. As some answers below mentioned it's a reserved path for admin stuff.

But the letters, a and h together, is it an abbreviation or something?

Joaquin Cuenca Abela · Accepted Answer · 2010-12-11T12:14:10.243

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It comes from apphosting, the underscore is to make it more difficult to collide with some user provided URL.

Edit: I worked at Google, apphosting was the first name they selected for AppEngine, and this name still remains in some parts of the internal configuration.

edited Dec 11 '10 at 12:14

answered Dec 10 '10 at 17:19

Joaquin Cuenca Abela

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@JoaquinCuencaAbela Do you have any ideas for that [similar question](https://reverseengineering.stackexchange.com/q/15416/17379)? – user2284570 May 23 '17 at 22:02

score 9 · Answer 2 · edited Jan 29 '15 at 16:58

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/_ah/ is a reserved URL path used by App Engine for features (mail, warmup, login, etc.) or administrative purposes.
Script handler and static file handler paths will never match this path.

edited Jan 29 '15 at 16:58

bain

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answered Dec 10 '10 at 11:00

systempuntoout

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That's right, but it doesn't answer my question. Posted an update for clarification. – kovshenin Dec 10 '10 at 12:06
why isn't it _fa or _af then? – antony.trupe Dec 10 '10 at 19:36
I think they will match. At least the login required script. – Jimmy Kane Jan 03 '14 at 18:29
The "reserved URL path" link is broken. – Jesse Webb Oct 23 '14 at 19:43

score 0 · Answer 3 · answered Dec 10 '10 at 17:51

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Maybe it's short for 'admin handler', but that's just a guess really.

answered Dec 10 '10 at 17:51

Tom van Enckevort

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What does _ah mean in Google App Engine?

3 Answers3

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