LGTM2 with the same conditions as Daniel. Thanks also for following up with
a summary before proceeding with rollout!

On Wed, Jul 19, 2023 at 11:56 AM Chris Thompson <cth...@chromium.org> wrote:

> Thanks Daniel. As a quick update, this was just enabled at 1% Stable in
> M115 (released yesterday). We have not seen any blockers come up from Beta,
> but since issues may arise mainly in the long tail of sites we might not
> see anything until Stable anyway. We'll keep an eye on our experimental
> rollout and follow up here with a summary.
>
> On Wed, Jul 19, 2023 at 11:52 AM Daniel Bratell <bratel...@gmail.com>
> wrote:
>
>> I've been waiting a bit to see if the experiment would blow anything up,
>> but if it doesn't, and continue to not do so, then
>>
>> LGTM1 as soon as the PR has landed.
>>
>> /Daniel
>> On 2023-06-14 17:40, Yoav Weiss wrote:
>>
>>
>>
>> On Thursday, June 8, 2023 at 5:53:49 PM UTC+2 Chris Thompson wrote:
>>
>> On Wed, Jun 7, 2023 at 9:41 PM Yoav Weiss <yoavwe...@chromium.org> wrote:
>>
>> Thanks for working on this!
>>
>> On Wed, Jun 7, 2023 at 11:44 PM Chris Thompson <cth...@chromium.org>
>> wrote:
>>
>> Thanks all. Some updates:
>>
>>    - We have filed a TAG review request
>>    <https://github.com/w3ctag/design-reviews/issues/853>
>>    - We are working on writing WPTs and we will update this thread when
>>    those are ready -- thanks for the added details about how those are run
>>    - We have added a `Non-Authoritative-Reason: HttpsUpgrades` header to
>>    the synthetic redirects (CL
>>    <https://chromium-review.googlesource.com/c/chromium/src/+/4584420>,
>>    which we are planning to merge back to M-115)
>>    - We are continuing to iterate on the spec PR
>>
>> For now we will continue to provide updates on this I2S -- closer to M115
>> going to Stable we may send an I2E to request the ability to proceed with a
>> 1% Stable experiment if we have not yet been able to resolve everything
>> here.
>>
>> @Harald Alvestrand <h...@google.com> : In general, this feature should
>> work fine with captive portals. A captive portal that intercepts HTTPS
>> connections will result in a certificate error, which will cause the
>> upgrade to fail and automatically fall back to HTTP. Alternatively, the
>> captive portal could reset the connection for HTTPS requests, which would
>> accomplish the same.
>>
>> We have had one report of a middlebox that returned an HTTP 404 error
>> over HTTPS instead of rejecting the connection, causing breakage (the
>> upgraded HTTPS page would load but have useless content). We do not believe
>> the browser should fallback on *application* level errors, as they do
>> not provide a useful signal that the site does not support HTTPS -- in the
>> vast majority of cases the same application error will occur over HTTP as
>> well. (This specific case was an enterprise situation, with an enterprise
>> installed root certificate making the middlebox's HTTPS work, and we have
>> enterprise policies to allow organizations to disable upgrades for affected
>> hosts.)
>>
>>
>> What's our plan to tackle such issues? Do we have an enterprise policy in
>> place?
>>
>>
>>
>> We have two enterprise policies for this feature:
>>
>>    - HttpsUpgradesEnabled
>>    <https://chromeenterprise.google/policies/#HttpsUpgradesEnabled> can
>>    be used to disable this feature on managed clients (we have a similar
>>    policy <https://chromeenterprise.google/policies/#HttpsOnlyMode> for
>>    Chrome's HTTPS-First Mode, i.e. the opt-in "Always use secure connections"
>>    setting)
>>    - HttpAllowlist
>>    <https://chromeenterprise.google/policies/#HttpAllowlist> can be used
>>    to allowlist hostnames or hostname patterns -- these will then not be
>>    upgraded on managed clients (this also applies to HTTPS-First Mode)
>>
>> There are two "escape hatches" for users who encounter breakage and need
>> to fall back to HTTP, although from prior measurement we expect this to be
>> rare:
>>
>>    - If the user explicitly types an "http://"; URL into the Omnibox
>>    (with the scheme), we skip upgrading that navigation and add the host to
>>    the allowlist.
>>    - If the user sets the "Insecure Content" content setting (
>>    chrome://settings/content/insecureContent) to "Allowed" for the site,
>>    then we skip upgrading navigations. (This setting also disables mixed
>>    content autoupgrading
>>    
>> <https://w3c.github.io/webappsec-mixed-content/level2.html#upgrade-algorithm>
>>  --
>>    for HTTPS Upgrades and HTTPS-First Mode we rely on Mixed Content Level 2 
>> to
>>    ensure no plaintext subresource requests are sent.)
>>
>>
>> That makes sense!
>>
>>
>>
>>
>>
>>
>>
>> On Wed, Jun 7, 2023 at 1:02 AM Harald Alvestrand <h...@google.com> wrote:
>>
>> How will this affect login to captive portals (WiFi login), which
>> frequently rely on rewriting HTTP requests?
>>
>>
>> On Tue, Jun 6, 2023 at 12:00 AM 'Panos Astithas' via blink-dev <
>> blink-dev@chromium.org> wrote:
>>
>> On Wed, May 31, 2023 at 7:31 AM Mike West <mk...@google.com> wrote:
>>
>>
>> -mike
>>
>>
>> On Wed, May 31, 2023 at 4:17 PM Rick Byers <rby...@chromium.org> wrote:
>>
>> As a long-time user of HTTPS-first mode, I'm excited to see this ship
>> ASAP!
>>
>> On Wed, May 31, 2023, 5:29 a.m. 'Mike West' via blink-dev <
>> blink-dev@chromium.org> wrote:
>>
>> On Fri, May 26, 2023 at 1:32 AM Chris Thompson <cth...@chromium.org>
>> wrote:
>>
>> On Thu, May 25, 2023 at 3:36 AM Mike West <mk...@chromium.org> wrote:
>>
>> I am enthusiastic about this (and not just because it should allow us to
>> deprecate/remove `Upgrade-Insecure-Requests`). A few comments inline:
>>
>> On Thu, May 25, 2023 at 1:13 AM Chris Thompson <cth...@chromium.org>
>> wrote:
>>
>> Contact emailscth...@chromium.org, dadr...@google.com
>>
>> Explainerhttps://github.com/dadrian/https-upgrade/blob/main/explainer.md
>>
>> Specificationhttps://github.com/whatwg/fetch/pull/1655
>>
>>
>> Thanks for putting this together! I'll leave some comments on the PR.
>> Given that we haven't gotten any feedback from Fetch editors, it might be
>> prudent to let them take a pass before locking in our current behavior.
>>
>>
>>  Yes, hopefully we can get some feedback, but I'm optimistic that we
>> won't be locking in behavior if we ship this as it should hopefully be not
>> site or user visible, so if we need to change the behavior to align
>> cross-browser we can iterate.
>>
>>
>> I left a few comments last week. I think the PR needs some work before we
>> can reasonably expect it to land in Fetch.
>>
>>
>> I agree (and left a few comments of my own). Would it be possible to make
>> some progress on this? Once the comments are addressed and we feel good
>> about the PR's state, could we use the Mozilla position as support and
>> publish the PR for review? (It's currently marked as a draft, which may
>> explain why it wasn't reviewed by Fetch editors)
>>
>>
>> Friendly ping on making progress on the PR! :)
>>
>>
>>
>>
>>
>> Do we have tests in place for this behavior in Web Platform Tests?
>> https://wpt.fyi/results/mixed-content/tentative/autoupgrades?label=
>> experimental&label=master&aligned holds some tests for subresources, but
>> I didn't see any around navigation or fallback behavior (which seems like
>> it might need some WPT infrastructure change to produce a domain that's
>> only served over HTTP).
>>
>>
>> We do not have Web Platform Tests but we can look into adding them.
>> Currently this is implemented in //chrome which I think might make this
>> more difficult (my understanding is that the WPT suite is run against
>> content_shell rather than chrome).  We are currently relying on browser
>> tests for our integration testing.
>>
>>
>> WPT is a pretty important part of shipping features that affect the
>> platform. It would be ideal if we could share these tests with our friends
>> at other vendors (and update existing tests that might be expecting
>> different behavior). Shifting the implementation to //content to make that
>> possible would also have the advantage of helping other Chromium embedders
>> ship this feature, which would be excellent for consistency in the project.
>>
>>
>> Note that the official WPT results on wpt.fyi are using full Chrome
>> builds. IIRC there are other features that require Chrome. I  personally
>> only consider having WPTs passing on upstream infra to be blocking I2S. 
>> @Panos
>> Astithas <pastit...@google.com> can say more authoritatively.
>>
>>
>> Indeed, upstream WPT results use full Chrome (and Firefox, Safari, etc.)
>> through wptrunner. Soon, this will also be the case when running WPT in
>> Chromium CI on Linux, once some blockers have been resolved.
>>
>> Panos
>>
>> +1 to the benefits of having this in content, but I personally think
>> that's outside the scope of API owners so not something that should block
>> an I2S.
>>
>>
>> I agree with this. I didn't mean to imply that //content implementation
>> was necessary, but that _having_ web platform tests is important for
>> interop. Browser tests are less useful in that regard. :)
>>
>>
>>
>>
>> Summary
>>
>> Automatically and optimistically upgrade all main-frame navigations to
>> HTTPS, with fast fallback to HTTP.
>>
>>
>> Blink componentInternals>Network>SSL
>> <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3ENetwork%3ESSL>
>>
>> TAG reviewFetch change process does not mention a TAG review, therefore
>> this is N/A (https://github.com/whatwg/fetch#pull-requests)
>>
>>
>> Blink's process does mention a TAG review. I think it would be a good
>> idea to put this in front of them. I also think they will appreciate it,
>> since it's directly in line with their previous guidance (e.g.
>> https://www.w3.org/2001/tag/doc/web-https).
>>
>>
>>
>> Sure, we can file a TAG review. I'll update this thread once that's done.
>>
>>
>> TAG review statusNot applicable
>>
>> Risks
>>
>>
>> Interoperability and Compatibility
>>
>> *Gecko*: Positive (https://github.com/mozilla/
>> standards-positions/issues/800) Firefox is offering a similar feature
>> already in their private browsing mode by default
>>
>> *WebKit*: No signal (https://github.com/WebKit/
>> standards-positions/issues/185)
>>
>> *Web developers*: No signals. This feature is not exposed directly to
>> web developers or users. However, HTTPS adoption is now standard practice
>> (>90% of page loads in Chrome use HTTPS), and automatically upgrading
>> navigations to HTTPS would avoid unnecessary redirects from HTTP to HTTPS
>> for site owners. The `upgrade-insecure-requests` header has some similar
>> functionality, and according to HTTP-Archive is found on ~6% of all
>> requests.
>>
>> *Other signals*:
>>
>> 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?
>>
>>
>> Debuggability
>>
>> Chrome will upgrade these navigations to HTTPS using a 307 internal
>> redirect, which will be visible in the Network panel of Developer Tools.
>>
>>
>> For HSTS, we synthesize a `Non-Authoritative-Reason` header on the
>> synthetic redirect that tells developers why the redirect happened. Is that
>> a pattern y'all will follow here as well? If so, it's probably a good idea
>> to document it somewhere; I don't think we've explained that header well. :)
>>
>>
>> Good idea. I'll get a CL up to add this to our implementation, and it
>> seems reasonable to merge back to M115. We can include a mention of it in
>> any public facing documentation we write about this. I'm also looking into
>> whether we can add NetLog events for the upgrade and fallback steps which
>> could help with triaging bug reports.
>>
>>
>> Thanks!
>>
>> Will this feature be supported on all six Blink platforms (Windows, Mac,
>> Linux, Chrome OS, Android, and Android WebView)?No
>>
>> Currently not available on Android WebView. We are implementing this
>> first for Chrome and will consider bringing this to WebView (likely as an
>> embedder opt-in) as follow up work.
>>
>>
>> Is this feature fully tested by web-platform-tests
>> <https://chromium.googlesource.com/chromium/src/+/main/docs/testing/web_platform_tests.md>
>> ?No
>>
>> Flag namehttps-upgrades
>>
>> Requires code in //chrome?True
>>
>>
>> Can you spell out what's required here? Just enterprise policy work, or
>> are there other things embedders would need to implement to make this
>> functionality work?
>>
>>
>> This feature is currently implemented in //chrome with some support code
>> in content/'s NavigationRequest. I think it would be feasible to migrate
>> the core of this into content/ -- we use an URLRequestLoaderInterceptor and
>> a NavigationThrottle to implement the upgrading and fallback logic. This is
>> currently shared with Chrome's HTTPS-First Mode (controlled by Chrome's
>> "Always use secure connections" setting). If we did migrate this logic to
>> content/, embedders would need to add their own support for at least (1)
>> how to handle allowlisting hostnames, and (2) enterprise policies for
>> enabling/disabling the feature and exempting hostnames. We do not have a
>> design ready for making this change though.
>>
>>
>> As mentioned above, it would be ideal for the pieces of this change that
>> affect the platform to be available in //content so they flow into
>> content_shell and other embedders.
>>
>>
>>
>>
>>
>> Tracking bughttps://bugs.chromium.org/p/chromium/issues/detail?id=1394910
>>
>> Launch bughttps://launch.corp.google.com/launch/4235192
>>
>> Sample links
>> http://example.com will upgrade to https://example.com.
>> http://www.alwayshttp.com will upgrade to https://www.alwayshttp.com but
>> fall back to http://www.alwayshttp.com because the site doesn't support
>> HTTPS.
>>
>> Estimated milestonesShipping on desktop115Shipping on Android115
>>
>> We are planning to do a field trial to gradually roll out this feature to
>> Chrome clients in Chrome 115.
>>
>>
>> Over what time period do you expect to ramp up to 100%? If you expect it
>> to push beyond the M115 timeframe, it might be reasonable to frame this as
>> an intent to experiment to give folks a little more time to weigh in on the
>> Fetch PR.
>>
>>
>> We are hoping to ramp up to 100% within M115, but it may end up
>> completing in M116.
>>
>> (We could do an I2E, but it did not seem like a good fit as there is no
>> Origin Trial component, this does not require developer involvement, etc.
>> Our understanding was even doing a non-OT 1% Stable rollout required
>> sending an I2S and getting LGTMs from API OWNERS. Let us know if you think
>> we should reassess our launch plan.)
>>
>>
>> We do have an experimentation path for running a Finch experiment on
>> stable/beta users (confusingly(?) under "Origin Trial"
>> <https://www.chromium.org/blink/launching-features/#:~:text=Depending%20on%20your,required%20before%20proceeding.>
>> in our documentation; we could probably improve that).
>>
>> I think I'd recommend that path to avoid any delays that might come up in
>> getting Fetch updated to support this feature. I'd LGTM an I2E @ 50%
>> beta/1% stable to gain confidence in the fallback mechanism at scale. For
>> I2S, I'm a little worried about the state of the spec and its eventual
>> interoperability across vendors. I'd like to get that hammered down before
>> making it harder to change details that developers might come to rely upon.
>>
>> -mike
>>
>>
>>
>>
>>
>> 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).
>> https://github.com/whatwg/fetch/pull/1655
>>
>> Link to entry on the Chrome Platform Statushttps://chromestatus.com/
>> feature/6056181032812544
>>
>> Links to previous Intent discussionsIntent to prototype: https://groups.
>> google.com/a/chromium.org/g/blink-dev/c/mgJqym5-Xek/m/0EAN6v7CCQAJ
>>
>> This intent message was generated by Chrome Platform Status
>> <https://chromestatus.com/>.
>>
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