@moisesosorio: Can you confirm that this is the omaha's behavior for Chrome OS?

Config wise, we don't set any app ID. Each config belongs to one app ID and that "filtering" by app ID happens before the config gets executed (that's what Omaha uses to identify the product to match against). I wasn't aware of Omaha returning back one app ID or the other, but my wild guess would be that, if it returns one, it'd be the same of the client request because that was the product that got matched.

So, in summary, I cannot confirm it but should be easy to test by faking a request to Omaha :)

That is probably the case, I checked an omaha returns the same appid.

Thanks.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/dev-util/+/d7a913a3455a4e857a11889516f9c7bf6204bf23

commit d7a913a3455a4e857a11889516f9c7bf6204bf23
Author: Amin Hassani <ahassani@google.com>
Date: Wed Mar 14 21:21:47 2018

autoupdate: Return response with client's app ID

Currently in autoupdate we sent a default hard coded app ID to the
client. However, this is not the bahvior of omaha, as omaha always, reply with
the same app ID requested by the user. This CL, modifes this bahavior in
autoupdate to return the app ID associated with the client's request.

BUG= chromium:821514 
TEST=cros flash

Change-Id: I7cd36c8e7ed6e36bed257a5373e62483136b585e
Reviewed-on: https://chromium-review.googlesource.com/961585
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>

[modify] https://crrev.com/d7a913a3455a4e857a11889516f9c7bf6204bf23/autoupdate_lib.py
[modify] https://crrev.com/d7a913a3455a4e857a11889516f9c7bf6204bf23/autoupdate.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/dev-util/+/4835a70dd71d5804db99ed066b7cf61e931866e5

commit 4835a70dd71d5804db99ed066b7cf61e931866e5
Author: Amin Hassani <ahassani@google.com>
Date: Thu Apr 05 23:45:42 2018

autoupdate: Return response with client's app ID

Currently in autoupdate we sent a default hard coded app ID to the
client. However, this is not the bahvior of omaha, as omaha always, reply with
the same app ID requested by the user. This CL, modifes this bahavior in
autoupdate to return the app ID associated with the client's request.

BUG= chromium:821514 
TEST=cros flash

Change-Id: I7cd36c8e7ed6e36bed257a5373e62483136b585e
Reviewed-on: https://chromium-review.googlesource.com/961585
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
(cherry picked from commit d7a913a3455a4e857a11889516f9c7bf6204bf23)
Reviewed-on: https://chromium-review.googlesource.com/998655
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>

[modify] https://crrev.com/4835a70dd71d5804db99ed066b7cf61e931866e5/autoupdate_lib.py
[modify] https://crrev.com/4835a70dd71d5804db99ed066b7cf61e931866e5/autoupdate.py

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/dev-util/+/828edc18ffb3117cb363a729e806503b6c5117e4

commit 828edc18ffb3117cb363a729e806503b6c5117e4
Author: Amin Hassani <ahassani@google.com>
Date: Thu May 03 21:44:45 2018

autoupdate: Return response with client's app ID

Currently in autoupdate we sent a default hard coded app ID to the
client. However, this is not the bahvior of omaha, as omaha always, reply with
the same app ID requested by the user. This CL, modifes this bahavior in
autoupdate to return the app ID associated with the client's request.

BUG= chromium:821514 
TEST=cros flash

Change-Id: I7cd36c8e7ed6e36bed257a5373e62483136b585e
Reviewed-on: https://chromium-review.googlesource.com/961585
Commit-Ready: Amin Hassani <ahassani@chromium.org>
Tested-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Xixuan Wu <xixuan@chromium.org>
Reviewed-by: Don Garrett <dgarrett@chromium.org>
(cherry picked from commit d7a913a3455a4e857a11889516f9c7bf6204bf23)
Reviewed-on: https://chromium-review.googlesource.com/1043166
Reviewed-by: Keith Haddow <haddowk@chromium.org>
Commit-Queue: Keith Haddow <haddowk@chromium.org>
Tested-by: Keith Haddow <haddowk@chromium.org>

[modify] https://crrev.com/828edc18ffb3117cb363a729e806503b6c5117e4/autoupdate_lib.py
[modify] https://crrev.com/828edc18ffb3117cb363a729e806503b6c5117e4/autoupdate.py