*Following up on an earlier thread here: https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/gGHOmFGEzQ0*
Contact emails: eric...@microsoft.com Explainer: None Specification: HSTS specification is at https://datatracker.ietf.org/doc/html/rfc6797; this feature proposes an improvement. Summary Strict-Transport-Security response headers can cause problems for localhost web servers because STS applies host-wide, across all ports. This causes compatibility problems for web developers testing locally as well as end-users who use software packages that commonly spin up localhost webservers for ephemeral reasons (e.g. communication of an auth token from a web login to a local software package). If one local listener sets Strict-Transport-Security on a localhost response, it will be applied to all subsequent localhost requests regardless of port. We resolve this problem by ignoring Strict-Transport-Security headers on responses from localhost URLs. Blink component: Internals>Network>DomainSecurityPolicy <https://bugs.chromium.org/p/chromium/issues/list?q=component:Internals%3ENetwork%3EDomainSecurityPolicy> TAG review: None Risks Interoperability and Compatibility The expectation is that this will improve compatibility with services that run on localhost by avoiding unexpected interactions across unrelated packages. *Gecko*: Shipped/Shipping *WebKit*: No signal *Web developers*: Positive ( https://issues.chromium.org/issues?q=HSTS%20localhost) Web Developers who test their sites locally commonly report problems with Strict-Transport-Security headers applying unexpectedly across unrelated localhost services under tests. *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? None Debuggability HSTS upgrades show in the F12 Network pane as "307 Internal Redirect." In the absence of such an upgrade, the 307 is not shown. Will this feature be supported on all six Blink platforms (Windows, Mac, Linux, ChromeOS, 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, HSTS is not tested by Web Platform tests. The change is tested by Chrome unit and browser tests. Flag name on chrome://flags: None Finch feature name: None Non-finch justification: None Requires code in //chrome? All of the functional changes are in /net/ but tests under /chrome/ require updates to use non 'localhost' test endpoints. Tracking bug https://issues.chromium.org/issues/41251622; CL: https://chromium-review.googlesource.com/c/chromium/src/+/5923046 <https://chromium-review.googlesource.com/c/chromium/src/+/5923046> Estimated milestones Shipping on desktop 132 Shipping on Android 132 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). None Link to entry on the Chrome Platform Status: https://chromestatus.com/feature/5134293196865536?gate=5113092281991168 Links to previous Intent discussions: https://groups.google.com/u/1/a/chromium.org/g/blink-dev/c/gGHOmFGEzQ0 -- 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 visit https://groups.google.com/a/chromium.org/d/msgid/blink-dev/8d6c447c-32ba-46af-b04e-828e69b38322n%40chromium.org.
