Re: [I18ndir] I18ndir early review of draft-ietf-dispatch-javascript-mjs-07

John R Levine <johnl@taugh.com> Sat, 09 May 2020 16:36 UTC

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Date: 9 May 2020 12:36:20 -0400
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From: "John R Levine" <johnl@taugh.com>
To: "=?UTF-8?Q?Patrik_F=C3=A4ltstr=C3=B6m?=" <patrik@frobbit.se>
Cc: "Myles Borins" <mylesborins@google.com>, "DISPATCH WG" <dispatch@ietf.org>, draft-ietf-dispatch-javascript-mjs.all@ietf.org, i18ndir@ietf.org
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Subject: Re: [I18ndir] I18ndir early review of draft-ietf-dispatch-javascript-mjs-07
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On Sat, 9 May 2020, Patrik Fältström wrote:
>> I'm sorry to hear that people are using filename extensions to tell what's in a file.  I'd hoped that all of the badness from old versions of Windows doing that might have been a hint.
>
> This is something that just must go away, and I think a big note in non-friendly letters must be added in the security considerations section is needed that explain the situation and why the current practice is not really what we want in the wild.
>
> I.e. yes, while still documenting "what works", that should not be the goal. It will lead to even more problems getting secure mechanisms in browsers deployed.

I agree with Patrik, this reinvents a security hole from the floppy disk 
era and is not something we should let pass without at least making it 
clear that we believe it is a significant mistake.

It occurs to me that http clients can send an Accept header, so how about 
saying that modules SHOULD be text/jsmodule, but MAY be text/javascript 
for backward compatibiltiy with clients that don't handle text/jsmodule?

Regards,
John Levine, johnl@taugh.com, Taughannock Networks, Trumansburg NY
Please consider the environment before reading this e-mail. https://jl.ly