On Tue, Mar 5, 2024 at 5:01 AM Yoshisato Yanagisawa <
yyanagis...@chromium.org> wrote:

> Contact emailsyyanagis...@google.com
>
> Specification
> https://w3c.github.io/ServiceWorker/#control-and-use-worker-client
>
> Summary
>
> According to
> https://w3c.github.io/ServiceWorker/#control-and-use-worker-client,
> workers should inherit controllers for the blob URL. However, existing code
> allows only dedicated workers to inherit the controller, and shared workers
> do not inherit the controller. This is the fix to make Chromium behavior
> adjust to the specification.
>
>
> Blink componentBlink>Workers
> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWorkers>
>
> TAG reviewNone
>
> TAG review statusNot applicable
>
> Risks
>
>
> Interoperability and Compatibility
>
> This is a change to make the Chromium behavior aligned with the
> specification, there should not be an interoperability issue. However,
> there is a compatibility issue from the past Chromium. If a blob URL is
> used for a SharedWorker script and a controller for the URL is mattered,
> there is a behavior change because this change makes a controller inherited.
>

I think it makes sense to send an intent to ship for this, based on
the specified
criteria
<https://www.chromium.org/blink/launching-features/#:~:text=The%20following%20criteria,environments%2C%20kiosks%2C%20etc)>
.
That would enable us to evaluate the compatibility risk, and make sure
we're making the right call here.


>
> *Gecko*: No signal
>
> *WebKit*: Shipped/Shipping
>
> *Web developers*: No signals
>
> *Other signals*:
>
> Ergonomics
>
> n/a
>
>
> Security
>
> Since this is adjusting Chromium behavior to specification, there should
> not be a security risk from a specification perspective. From the
> implementation perspective, this change simply inherits existing
> controller. There should not be any additional security risks with this
> change.
>
>
> WebView application risks
>
> Does this intent deprecate or change behavior of existing APIs, such that
> it has potentially high risk for Android WebView-based applications?
>
> None
>
>
> Debuggability
>
> n/a
>
>
> Will this feature be supported on all six Blink platforms (Windows, Mac,
> Linux, ChromeOS, Android, and Android WebView)?No
>
> Since SharedWorker is not supported in Android yet, the feature also does
> not affect to Android.
>
>
> Is this feature fully tested by web-platform-tests
> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
> ?Yes
>
>
> https://wpt.fyi/results/service-workers/service-worker/local-url-inherit-controller.https.html
> Same-origin blob URL sharedworker should inherit service worker controller.
> Same-origin blob URL sharedworker should intercept fetch(). The tests
> ensure a ServiceWorkerController is inherited. Due to crbug.com/40364838,
> Chromium does not pass the former test.
>
>
> Flag name on chrome://flagsn/a
>
> Finch feature nameSharedWorkerBlobURLFix
>
> Requires code in //chrome?False
>
> Tracking bughttps://issues.chromium.org/issues/324939068
>
> Estimated milestones
> Shipping on desktop 124
>
> Anticipated spec changes
>
> Open questions about a feature may be a source of future web compat or
> interop issues. Please list open issues (e.g. links to known github issues
> in the project for the feature specification) whose resolution may
> introduce web compat/interop risk (e.g., changing to naming or structure of
> the API in a non-backward-compatible way).
> None
>
> Link to entry on the Chrome Platform Status
> https://chromestatus.com/feature/6401033384493056
>
> This intent message was generated by Chrome Platform Status
> <https://chromestatus.com/>.
>
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> .
>

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