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Re: [art] BCP190

"Manger, James" <James.H.Manger@team.telstra.com> Wed, 24 July 2019 01:12 UTC

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From: "Manger, James" <James.H.Manger@team.telstra.com>
To: Mark Nottingham <mnot@mnot.net>, ART Area <art@ietf.org>
Thread-Topic: [art] BCP190
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Date: Wed, 24 Jul 2019 01:10:46 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/art/UKXF-Ciwjbnva8u6B-AiRZUlq7U>
Subject: Re: [art] BCP190
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> From: art <art-bounces@ietf.org> On Behalf Of Mark Nottingham
>
> Regarding URL Templates -- FWIW, there are many libraries and a well-defined test suite available; see:
>  https://github.com/uri-templates/uritemplate-spec/wiki/Implementations
>  https://github.com/uri-templates/uritemplate-testf

Unfortunately, RFC6570 "URI Template" is not fit for purpose.

It doesn't support the basic feature of allowing a site (template author) to choose its own names for optional query parameters. For instance, if a spec defines variables "searchTerms", "startPage", and "language"; a site can't chose to put these in query parameters named "q", "pg", and "lang", that are omitted when no value is defined. {?searchTerms,startPage,language} will omit undefined variables; ?q={searchTerms}&pg={startPage}&lang={language} will use the site's names. A site cannot have both with RFC6570.

It also tramples on the meaning of commas; giving them meaning that the URI spec never did. For instance, /pay/{amount},{to},{desc} looks reasonable, but in fact if the "amount" is given as an array its expansion will include the reserved "," character so it can override the "to" field.

--
James Manger

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