Re: parameter quoting - LC comment on draft-nottingham-http-link-header-07.txt

[Mike Burrows <[e-mail]>]

Hi Julian (and all),

Which made have a closer look at existing parameters (sorry for not bringing
> this up earlier):
>
>                     | ( "type" "=" type-name "/" subtype-name )
>
> I believe this *definitively* needs quoting, as "/" is a separator
> character in HTTP and thus can not appear in a token.
>

But is 'type-name "/" subtype-name' a token?  I didn't interpret as such -
in fact I assumed (perhaps erroneously) that it was in fact two tokens
separated by "/".

Regards,
Mike


2010/1/21 Julian Reschke <[e-mail]>

> Hi,
>
> a few comments regarding quoting of link parameters:
>
> <http://tools.ietf.org/html/draft-nottingham-http-link-header-07#section-5>
> defines the new parameters:
>
>                     | ( "hreflang" "=" Language-Tag )
>                     | ( "media" "=" ( MediaDesc | <"> MediaDesc <"> ) )
>
> "hreflang" and "media", so quoting is allowed for media, but it's not for
> hreflang. I think it's correct that valid language tags never require
> quoting, but I'm not sure that disallowing quoting is the right thing to do
> here.
>
> Which made have a closer look at existing parameters (sorry for not
> bringing this up earlier):
>
>                     | ( "type" "=" type-name "/" subtype-name )
>
> I believe this *definitively* needs quoting, as "/" is a separator
> character in HTTP and thus can not appear in a token.
>
> Also, as this spec uses the RFC 2616 ABNF, we probably need to duplicate
> the statement from <
> http://greenbytes.de/tech/webdav/rfc2616.html#rfc.section.3.7>:
>
> "...Linear white space (LWS) MUST NOT be used between the type and subtype,
> ..."
>
> Best regards, Julian
>
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