Contact emails

erico...@chromium.org

Explainer

None

Specification

https://datatracker.ietf.org/doc/html/draft-ietf-dnsop-svcb-https-07

Summary

Query DNS for HTTPS records (alongside traditional A and AAAA queries).
When a website has deployed an HTTPS DNS record and Chrome receives it,
Chrome will always connect to the website via HTTPS.

Design doc for all Chrome DNS HTTPS plans:
https://docs.google.com/document/d/1k461sRbddjDGj7Q8f-ZKHZvmB-ENUWSdX_3Fpp2dmXQ

This feature covers just the basic query and HTTP->HTTPS upgrade part of
those plans, and only for simpler cases that do not require followup DNS
queries by the Chrome DNS stack.


Blink component

Internals>Network>DNS
<https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3ENetwork%3EDNS>

TAG review

Not applicable. No direct changes to web platform APIs. Change is to
underlying DNS infrastructure, following an IETF spec, with only indirect
web-facing side effects.

TAG review status

Not applicable

Risks

Interoperability and Compatibility

Not directly part of the web API surface; only has indirect behavior
implications on the web platform in the form of the HTTP->HTTPS redirect
triggered by DNS signals.

HTTPS DNS records are a feature of DNS.  The spec is a draft of the IETF
DNSOP working group, and while not yet a published RFC, it is widely
considered stable and ready for implementation.  IANA has designated HTTPS
as DNS resource record type 65.


Gecko: No signal

WebKit: Safari has been querying HTTPS DNS records since late 2020. Unclear
if Safari has yet implemented HTTP->HTTPS redirect behavior of such records.

Web developers: No signals


Debuggability

No specific DevTools support.  Changes not directly part of the web API
surface.  Chrome is not generally used as a development tool for changing
DNS records besides testing/developing the indirect behavior effects on
visiting websites.


Is this feature fully tested by web-platform-tests
<https://chromium.googlesource.com/chromium/src/+/master/docs/testing/web_platform_tests.md>
?

No

Flag name

None

Requires code in //chrome?

False

Tracking bug

https://crbug.com/1206455

Launch bug

https://crbug.com/1206460

Estimated milestones

Desktop 96

Android 96

Link to entry on the Chrome Platform Status

https://www.chromestatus.com/feature/5485544526053376

This intent message was generated by Chrome Platform Status
<https://www.chromestatus.com/>.

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