On 8/3/23 4:39 PM, John Delaney wrote:
Contact emails
[email protected], [email protected]
Explainer
https://github.com/WICG/attribution-reporting-api/blob/main/flexible_event_config.md#phase-1-lite-flexible-event-level*
*
https://github.com/WICG/attribution-reporting-api/blob/main/EVENT.md
<https://github.com/WICG/attribution-reporting-api/blob/main/EVENT.md>
Specification
https://wicg.github.io/attribution-reporting-api/
<https://wicg.github.io/attribution-reporting-api/>
Blink component
Internals > AttributionReporting
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3EAttributionReporting>
Summary
We plan on landing a number of changes to the Attribution Reporting
API focused on:
*
registration ergonomics allowing better flexibility when
controlling whether attribution should occur based on the time
between the two events
*
support for developer controlled configurations that allow for
callers to specify the windowing scheme and number of reports to
receive for an event, in order to more efficiently extract utility
out of the privacy mechanism
Spec changes
1.
Allow expiry, event_report_window, aggregatable_report_window
fields to be integers
<https://github.com/WICG/attribution-reporting-api/pull/895>
2.
Lookback window in filters
<https://github.com/WICG/attribution-reporting-api/pull/914>
3.
Developer defined configurations for reporting windows and maximum
# of reports
<https://github.com/WICG/attribution-reporting-api/pull/856>
*
Separate verbose debug report for start time
<https://github.com/WICG/attribution-reporting-api/pull/916>
4.
Reduce min event report window time from 1 day to 1 hour and
prohibit negative durations
<https://github.com/WICG/attribution-reporting-api/pull/876>
Risks
Interoperability and Compatibility
Changes (1) (3) are all fully backwards compatible. (2)
(3) are optional, additive changes to the API surface which allow for
additional information to be provided by developers at registration time.
(2) is largely backwards compatible except in the case a
developer was previously using a key with the name "_lookback_window",
where they will now see different behavior when matching. We expect
the API breakage to be negligible.
Is this based on metrics you have in front of you, or something else?
Also, what might breakage look like in this situation?
(4) has some marginal backwards incompatibility.
“prohibit negative durations” will result in any previous
registrations now resulting in a failure rather than being clamped to
a minimum value. In the event a registration fails, there will be no
user-visible / web-visible breakage outside of different reports being
emitted than before. That being said, we also expect API breakage here
to be negligible.
Why would a negative duration be used today? It sounds weird, but I've
also seen "max-age=-1" w/ cookies to mean "like, now-now". Are we aware
of any usage of negative durations?
Will this feature be supported on all six Blink platforms (Windows,
Mac, Linux, Chrome OS, Android, and Android WebView)?
All except Android WebView
Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>?
Yes
Estimated milestones
Chrome 117
Link to entry on the Chrome Platform Status
https://chromestatus.com/feature/5089526405398528
<https://chromestatus.com/feature/5089526405398528>
Links to previous Intent discussions
Previous I2S:
https://groups.google.com/a/chromium.org/g/blink-dev/c/2Rmj5V6FSaY
<https://groups.google.com/a/chromium.org/g/blink-dev/c/2Rmj5V6FSaY>
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