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Suggest how to solve this

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http://smcv.pseudorandom.co.uk/ 2008-08-02 09:48:32 -04:00 committed by Joey Hess
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doc/bugs/recentchanges_feed_links.mdwn
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@ -52,3 +52,43 @@ to turn on? --Chapman Flack
>>>> not a very good guid.) If using an anchor for a guid is a problem,
>>>> it could instead generate a random uuid, and use `\[[meta
>>>> guid="urn:uuid:<foo>" permalink="http://url/recentchanges"]]`
>>>>> I had a quick look into this after fixing the "prerequisite", but got
>>>>> bogged down in minor details. Anyway, I'd be happy to help.
>>>>> I think the guid stuff is actually fairly irrelevant, you just need
>>>>> `\[[!meta permalink]]` (and in fact you're using guid incorrectly, by
>>>>> expecting it to be treated as a link).
>>>>>
>>>>> My advice would be: first, fix the bug as reported, by
>>>>> using `\[[!meta permalink="http://blah/blah/blah#change-$rev"]]` (starting
>>>>> anchor names with a number isn't syntactically valid, if I remember
>>>>> correctly, so do have a prefix like "change-" or "rev-" or something).
>>>>>
>>>>> Then, optionally, force the guid too (although it defaults to the permalink
>>>>> anyway, so this shouldn't actually be necessary).
>>>>>
>>>>> Some more explanation of how guids work: it's actually easier to think
>>>>> about them in Atom terms than in RSS terms, since Atom has a clearer
>>>>> conceptual model.
>>>>>
>>>>> The `\[[!meta permalink]]` becomes the `<link>`
>>>>> element in Atom, which contains a link that users can follow; if it's not
>>>>> explicitly given, ikiwiki uses its idea of the page's URL.
>>>>>
>>>>> The `\[[!meta guid]]` becomes the `<id>` element in Atom, which contains an
>>>>> opaque, not-necessarily-resolvable identifier; if it's
>>>>> not explicitly given, ikiwiki uses the same URL as the `<link>`.
>>>>>
>>>>> In RSS the semantics aren't so clear-cut (which is part of why Atom exists!),
>>>>> but the way ikiwiki interprets them is:
>>>>>
>>>>> * `<link>` is the same as in Atom
>>>>> * if `\[[!meta guid]]` is explicitly given, put it in `<guid permalink="no">`
>>>>> (the assumption in this case is that it's a UUID or something)
>>>>> * if `\[[!meta guid]]` is not explicitly given, copy the `<link>` into the `<guid>`
>>>>>
>>>>> I believe RSS aggregators (are meant to) compare `<guid>`s as opaque
>>>>> strings, so using an anchor there should be fine. Atom aggregators are certainly
>>>>> required to compare `<id>`s as opaque strings.
>>>>>
>>>>> --[[smcv]]