El mar., 9 de agosto de 2022 03:24, Mike West <mk...@chromium.org> escribió:

> LGTM1 to extend this already-approved feature to WebView.
>
> Presumably you'll be chatting with WebView experts about any implications
> this might have for the API WebView exposed to embedding apps?
>
> -mike
>
>
> On Wed, Aug 3, 2022 at 8:45 PM Ari Chivukula <aric...@chromium.org> wrote:
>
>> Contact emails
>>
>> aric...@chromium.org, miketa...@chromium.org, yoavw...@chromium.org
>> <yoavwe...@chromium.org>
>>
>> Specification
>>
>> https://wicg.github.io/client-hints-infrastructure/
>>
>> Explainer
>>
>> When a page is loaded, the first response from an origin may include a
>> signal (in HTTP headers) for Client Hints to be included in future requests
>> to that origin. Without persisting this signal, Client Hints cannot be
>> included in the next request to load a page from this Origin. Android
>> WebView does not currently persist this signal.
>>
>> Design Doc
>>
>>
>> https://docs.google.com/document/d/1r1AKHex1_UKh3wIp4ITkU4-J9-tdNZSOmUDeDVWw_AU/
>>
>> Summary
>>
>> We aim to add support for persistent Client Hints to Android Webview for
>> parity with the rest of the platform. For more details on the Client Hints
>> system see:
>> https://developer.mozilla.org/en-US/docs/Web/HTTP/Client_hints
>>
>>
>>
>> Blink component
>>
>> Blink>Network>ClientHints
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component%3ABlink%3ENetwork%3EClientHints>
>>
>>
>>
>> Motivation
>>
>> Without persisting the list of Client Hints a page requests the initial
>> load of a website will never include Client Hints, only subresources on a
>> given page can receive them. This undermines the use of the Client Hints
>> system which is to empower websites to adapt content to the User Agent. We
>> should add persistence in the interest of parity with the behavior of
>> Chrome on Android so that WebView stays viable as a platform.
>>
>> TAG review
>>
>> N/A (this change enables a feature that we already ship on desktop and
>> Android)
>>
>> Compatibility
>>
>> This expands persistent Client Hints to a platform that was missing it,
>> no existing implementation will change. The persisted Client Hints can be
>> cleared by clearing the Cookies for a given WebView, the same way that
>> Client Hints are cleared in Chrome for Android.
>>
>>
>> Interoperability
>>
>> Other engines haven’t shipped Client Hints so this doesn’t increase
>> interoperability risk.
>>
>>
>>
>> Gecko: Client Hints
>> <https://github.com/mozilla/standards-positions/issues/79> and User
>> Agent Client Hints
>> <https://github.com/mozilla/standards-positions/issues/202> considered
>> non-harmful
>>
>>
>>
>> WebKit: Mildly positive support for User Agent Client Hints
>> <https://lists.webkit.org/pipermail/webkit-dev/2020-May/031198.html>
>>
>>
>>
>> Web developers: Vendor interest from Huawei
>> <https://bugs.chromium.org/p/chromium/issues/detail?id=921655&colspec=ID%20Pri%20Type%20Component%20Status%20Summary%20Owner%20Target%20M%20Reporter%20Modified%20Opened%20NextAction&sort=nextaction#:~:text=it%20looks%20good-,Comment%2044,-by>,
>> interest from Cloudinary
>> <https://github.com/WICG/client-hints-infrastructure/issues/108> in User
>> Agent Client Hints
>>
>> Debuggability
>>
>> N/A (developers can use Chrome for Android to debug client hint requests,
>> though the values for user-agent related strings will differ within the
>> WebView context)
>>
>> Is this feature fully tested by web-platform-tests?
>>
>> Android WebView is not a WPT platform, so this will only have chrome
>> internal tests
>>
>> Tracking bug
>>
>> https://crbug.com/921655
>>
>> Link to entry on the Chrome Platform Status
>>
>> https://chromestatus.com/feature/4936247663919104
>>
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