Contact emailspmee...@google.com ExplainerNone
Specificationhttps://datatracker.ietf.org/doc/rfc9218 Summary This feature adds the 'priority' request header for all HTTP requests with the priority information for the request at the time that it was sent. RFC 9218 (Extensible Prioritization Scheme for HTTP) defines a 'priority' HTTP request header to use for signaling request priority to origins (and intermediaries). It also defines negotiation processes and protocol-level frames for HTTP/2 and HTTP/3 to carry the same priority information. The header can only signal the initial priority for a resource when it was first requested while the frame-based mechanisms allow for modifying the priority after the fact. The header can operate end-to-end to the origin servers (and provide a mechanism for the origin to override the priority if recognized by intermediaries) while the frames are limited to operating on a link level. This feature is specifically for supporting the header-based prioritization scheme. Blink componentBlink>Network <https://bugs.chromium.org/p/chromium/issues/list?q=component:Blink%3ENetwork> TAG reviewNone TAG review statusNot applicable Risks Interoperability and Compatibility None *Gecko*: Shipped/Shipping *WebKit*: Shipped/Shipping *Web developers*: No signals *Other signals*: Security The priority information for a given request is already exposed in HTTP/2 and HTTP/3 in the frame-based priority fields (and weights in HTTP/2). This moves the same information directly into the headers for HTTP/2 and HTTP/3 only. 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 Goals for experimentation Enable the header for a sample of the population and make sure there is no negative feedback before turning on globally. Ongoing technical constraints None Debuggability The "Priority" header is exposed in both the Dev Tools network panel (in the Request Headers) and in the Netlog. Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, Chrome OS, Android, and Android WebView)?Yes Is this feature fully tested by web-platform-tests <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md> ?No HTTP headers (and protocols) are not testable in Web Platform Tests. Flag name on chrome://flags Finch feature namePriorityHeader Requires code in //chrome?False Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1404785 Estimated milestones DevTrial on desktop 119 DevTrial on Android 119 Link to entry on the Chrome Platform Status https://chromestatus.com/feature/5109106573049856 Links to previous Intent discussionsIntent to prototype: https://groups.google.com/a/chromium.org/g/blink-dev/c/eEeDzwtw5v0 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 on the web visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/CAPq58w5KJijit8ObBhWKzCnLjro7jSfAsxfPPZ66NwmTO_ZT%3Dg%40mail.gmail.com.
