On Thu, Oct 7, 2021 at 5:51 PM Yutaka Hirano <yhir...@chromium.org> wrote:

>
>
> On Thu, Oct 7, 2021 at 5:38 PM Philip Jägenstedt <foo...@chromium.org>
> wrote:
>
>> On Thu, Oct 7, 2021 at 10:04 AM Yutaka Hirano <yhir...@chromium.org>
>> wrote:
>>
>>> Thank you!
>>>
>>> On Thu, Oct 7, 2021 at 4:45 PM Philip Jägenstedt <foo...@chromium.org>
>>> wrote:
>>>
>>>> On Tue, Oct 5, 2021 at 3:20 PM Yutaka Hirano <yhir...@chromium.org>
>>>> wrote:
>>>>
>>>>>
>>>>>
>>>>> On Mon, Oct 4, 2021 at 10:04 PM Philip Jägenstedt <foo...@chromium.org>
>>>>> wrote:
>>>>>
>>>>>> On Fri, Oct 1, 2021 at 9:27 PM Yutaka Hirano <yhir...@chromium.org>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi Philip,
>>>>>>>
>>>>>>> Sorry for the belated reply. Comments inline:
>>>>>>>
>>>>>>> On Thu, Sep 30, 2021 at 7:31 PM Philip Jägenstedt <
>>>>>>> foo...@chromium.org> wrote:
>>>>>>>
>>>>>>>> Hi again,
>>>>>>>>
>>>>>>>> I've made a full pass of the intent now. I have a lot of questions,
>>>>>>>> but am pretty convinced we should ship this, it's just a matter of what
>>>>>>>> things need to block that, and what things can be left until later.
>>>>>>>>
>>>>>>>> Comments inline...
>>>>>>>>
>>>>>>>> On Mon, Sep 27, 2021 at 6:55 AM Yutaka Hirano <yhir...@chromium.org>
>>>>>>>> wrote:
>>>>>>>>
>>>>>>>>> Contact emails
>>>>>>>>>
>>>>>>>>> yhir...@chromium.org, vasi...@chromium.org
>>>>>>>>>
>>>>>>>>> Explainer
>>>>>>>>>
>>>>>>>>> https://github.com/w3c/webtransport/blob/main/explainer.md
>>>>>>>>>
>>>>>>>>> Specification
>>>>>>>>>
>>>>>>>>> https://w3c.github.io/webtransport
>>>>>>>>>
>>>>>>>>> https://datatracker.ietf.org/doc/html/draft-ietf-webtrans-http3/
>>>>>>>>>
>>>>>>>>> https://datatracker.ietf.org/doc/html/draft-ietf-quic-datagram/
>>>>>>>>>
>>>>>>>>
>>>>>>>> I skimmed https://github.com/w3c/webtransport/issues/ and see
>>>>>>>> multiple issues filed by other browser vendors. Are any of the 
>>>>>>>> remaining
>>>>>>>> issues ones that could change the API's shape or behavior? It would be 
>>>>>>>> good
>>>>>>>> to resolve any such issues, since they won't be possible to address 
>>>>>>>> once
>>>>>>>> the API is locked in by sites depending on it.
>>>>>>>>
>>>>>>>>
>>>>>>> I believe we've addressed issues that may require breaking changes.
>>>>>>> You can see open <https://github.com/w3c/webtransport/milestone/1>/
>>>>>>> closed <https://github.com/w3c/webtransport/milestone/1?closed=1> issues
>>>>>>> for the initial launch (this intent).  I shared our plan
>>>>>>> <https://docs.google.com/document/d/1X9-a03rtm0FqTW01nG6e7f91NAguGEv37mP964HrJlk/edit#heading=h.v9yxozj8naro>
>>>>>>>  at a WG meeting in May
>>>>>>> <https://www.w3.org/wiki/WebTransport/Meetings#WebTransport_Bi-weekly_Virtual_Meeting_.2316_late_-_May_25.2C_2021>
>>>>>>>  and
>>>>>>> we've been working to find and resolve such issues since then.
>>>>>>>
>>>>>>
>>>>>> I see, creating a milestone for this is really handy! Are the
>>>>>> remaining issue in https://github.com/w3c/webtransport/milestone/1
>>>>>> not blocking then, even issue #349
>>>>>> <https://github.com/w3c/webtransport/issues/349>?
>>>>>>
>>>>>
>>>>> *Except for issue #349* we have consensus on discussions. As Victor
>>>>> commented in this thread, we can ship WebTransport *except for *
>>>>> customeCertificationHashes
>>>>> <https://w3c.github.io/webtransport/#dom-webtransportoptions-servercertificatehashes>
>>>>>  if
>>>>> needed.
>>>>>
>>>>
>>>> If custom certificates is a nice-to-have then shipping without it seems
>>>> fine to me. That would mean removing serverCertificateHashes from the
>>>> dictionary, right? I ask because the spec also says something
>>>> about NotSupportedError when the protocol doesn't support it, but it seems
>>>> better to behave as if the feature doesn't exist at all.
>>>>
>>>>
>>> The property is protected by WebTransportCustomCertificates
>>> <https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/modules/webtransport/web_transport_options.idl>,
>>> so when we enable only WebTransport, the property will be invisible.
>>>
>>
>> Great, thanks for confirming!
>>
>>
>>> Looking through some other issues:
>>>>
>>>>    - Can https://github.com/w3c/webtransport/issues/59 be resolved for
>>>>    the WebPKI case? If CSP currently has no effect, then adding it on later
>>>>    could be hard because some sites could already be using CSP that would
>>>>    block it, and those sites would be broken by adding CSP support later.
>>>>
>>>>
>>> Yes I think so. We check the "connect-src" directive. It is tested as
>>> csp-fail.https.window.js
>>> <https://github.com/web-platform-tests/wpt/blob/master/webtransport/csp-fail.https.window.js>
>>> and csp-pass.window.js
>>> <https://github.com/web-platform-tests/wpt/blob/master/webtransport/csp-pass.https.window.js>
>>> .
>>>
>>
>> That's good, the risk I was worried about doesn't exist then. Would you
>> consider that this behavior is required by some spec, even though it's not
>> mentioned in https://w3c.github.io/webtransport/? If not, then do you
>> think it's reasonable to prioritize the spec work for this before this
>> reaches stable?
>>
>
> This behavior should be specified, and yes I think that effort should be
> prioritized. I'm happy to work on that.
>
>

I made a PR for this: https://github.com/w3c/webtransport/pull/367


>
>>
>>>>    - https://github.com/w3c/webtransport/issues/175 sounds editorial
>>>>    but doesn't have that label. If any code would change as a result of 
>>>> fixing
>>>>    it, should this be done before shipping?
>>>>
>>>> I think this is to describe our current protection and won't affect
>>> implementation.
>>>
>>>
>>>>
>>>>    - https://github.com/w3c/webtransport/issues/236 has no discussion,
>>>>    could it have any impact on implementation?
>>>>
>>>> This is about how to describe algorithms in the spec in terms of
>>> threading, and this won't impact implementation.
>>>
>>
>>  Again, thanks for confirming!
>>
>>>

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