buffet: Implement exponential backoff for cloud requests
Simplified logic of DoCloudRequest() method in buffet to de-couple
the multiple levels of callbacks and retries. Also added support for
exponential backoff on request failures.
In the process made RefreshAccessToken and GetDeviceInfo methods
fully asynchronous.
BUG=brillo:955
TEST=`FEATURES=test emerge-link buffet`
`test_that -b link 100.96.49.59 e:buffet_.*`
Change-Id: Ieeb2fa42ea25f15841bad5c6c09c6c9990f96943
Reviewed-on: https://chromium-review.googlesource.com/280833
Reviewed-by: Vitaly Buka <vitalybuka@chromium.org>
Tested-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Vitaly Buka <vitalybuka@chromium.org>
5 files changed
tree: efc5eed746f12d97f0893e4a9d38f871c0c15744
- buffet/