On Friday, November 15, 2024 at 9:14:09 AM UTC+9 Chromestatus wrote:
Contact emails yyanagis...@google.com Explainer None 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. An enterprise policy SharedWorkerBlobURLFixEnabled is available to control this feature. Blink component Blink>Workers <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3EWorkers> TAG review None TAG review status Not 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. An enterprise policy was added to allow enterprise customers to preserve the past Chromium behavior. Do you have any metrics on how many page loads this change might impact? An enterprise policy seems like a good idea, but if the number of page loads is high, we might want to consider a deprecation trial or similar mechanism. *Gecko*: No signal Can you ask Gecko for signals? I am especially curious why they haven't updated to match the specification. *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? Since SharedWorker is not supported on Android yet, there is no risk on Android WebView. 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 about://flags None Finch feature name SharedWorkerBlobURLFix Requires code in //chrome? False Tracking bug https://crbug.com/324939068 Estimated milestones Shipping on desktop 133 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/5137897664806912?gate=5147843735322624 This intent message was generated by Chrome Platform Status <https://chromestatus.com>. -- You received this message because you are subscribed to the Google Groups "blink-dev" group. To unsubscribe from this group and stop receiving emails from it, send an email to blink-dev+unsubscr...@chromium.org. To view this discussion visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/bbe4d87d-5461-4bd3-ade9-4d916ad5fc99n%40chromium.org.
