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Re: URI Template experience

From: Mike Burrows <asplake@googlemail.com>
Date: Sun, 23 Aug 2009 11:23:41 +0100
Message-ID: <7a2269960908230323r3a8c9c36v9a3d0a13355ae404@mail.gmail.com>
To: "Roy T. Fielding" <fielding@gbiv.com>
Cc: Mark Nottingham <mnot@mnot.net>, Joe Gregorio <joe@bitworking.org>, URI <uri@w3.org>
Thanks again.  Couple of comments now that I've had a change to build the doc:

1) It would be very useful to be able to specify that a variable is
mandatory, to prevent invalid expansions such as
(not to mention others that look less clearly invalid but are still
not the intention of the template)

This will give much more reliable feedback to the client than a
server-side validation ever could.  This can be achieved without
changing the syntax simply by specifying that an error is raised by a
Simple or Reserved substitution, if the variable has not been assigned
and no default value is specified.

Nothing is lost with my proposal - this template:
will expand in the unassigned case to be

Others may have good reasons to propose additional syntax though.

2) Can (or should) the new syntax have a neat way (or any way at all!)
to support things like optional file extensions?  Like them or loathe
them they're important out there in the wild - try modeling a
multi-format Rails application efficiently without them.

In the old syntax {-prefix|.|format} did the trick nicely; something
like {.format} might be a good fit now (it's in the spirit of the new
/ operator) but perhaps it could be generalised.  Or did I miss a
trick in the new syntax?


2009/8/21 Roy T. Fielding <fielding@gbiv.com>:
> On Aug 20, 2009, at 11:31 PM, Mike Burrows wrote:
>> Has there been any progress on URI Templates since the last flurry of
>> mails in early June?  Would a sneak preview of the new syntax be
>> possible?
> I actually did a lot of work on it just prior to the IETF
> deadline, but failed to make it far enough for a new draft
> before needing to switch back to httpbis.  You can see it
> in the work area:
> http://uri-templates.googlecode.com/svn/trunk/spec/
> draft-gregorio-uritemplate.xml
> I will swap back in soon,
> ....Roy
Received on Sunday, 23 August 2009 10:24:21 UTC

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