@zvava
is the first url metadata field unequivocally treated as the canon feed url when calculating hashes, or are they ignored if they're not at least proper urls? do you just tolerate it if they're impersonating someone else's feed, or pointing to something that isn't even a feed at all?
and if the first url metadata field changes, should it be logged with a time so we can still calculate hashes for old posts? or should it never be updated? (in the case of a pod, where the end user has no choice in how such events are treated) or do we redirect all the old hashes to the new ones (probably this, since it would be helpful for edits too)
Antworten zu #xrswtvq von @zvava
@zvava
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#xrswtvq
@alexonit prologic has me sold on the idea of hashv2 being served alongside a text fragment, eg. (#abcdefghijkl https://example.com/tw.txt#:~:text=2025-10-01T10:28:00Z), because it can be simply hacked in to clients currently on hashv1 and provides an off-ramp to location-based addressing (though i still think the format should be changed to smth like #<abc... http://example.com/...> so it's cleaner once we finally drop hashes)
Antworten zu #xodo4da von @zvava
@lyse
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#xodo4da
Antworten zu #2kiw2vq von @lyse
@zvava
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#2kiw2vq
@lyse i would like to ditch hash addressing but as was pointed out it would be a pain in the ass to get clients currently working off of hashv1 to suddenly switch to location-based addressing instead of just hashv2 with the option to eventually phase it out — unless we can rally together all active client developers to decide on a location-based addressing specification (i still think my original suggestion of #<https://example.com/tw.txt#yyyy-mm-ddThh:mm:ssZ> is foolproof)
@lyse
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#xrswtvq
@zvava Yes, the specification defines the first url to be used for hashing. No matter if it points to a different feed or whatever. Just unsubscribe from malicious feeds and you're done.
Since the first url is used for hashing, it must never change. Otherwise, it will break threading, as you already noticed. If your feed moves and you wanna keep the old messages in the same new feed, you still have to point to the old url location and keep that forever. But you can add more urls. As I said several times in the past, in hindsight, using the first url was a big mistake. It would have been much better, if the last encountered url were used for hashing onwards. This way, feed moves would be relatively straightforward. However, that ship has sailed. Luckily, feeds typically don't relocate.