Dne Friday 15 of August 2008 23:45:44 Peter Saint-Andre napsal(a): > Pavel Simerda wrote: > > Btw, what I didn't know before... I have looked into the CID/MID rfc > > and there's nothing about requiring the at-sign. It's only written in > > the common practice sections but there they use. And they do use local > > hstnames, not shared strings. > > > > But then "xmpp.sha1.da39aee5e6b4b0d3255bfef95601890afd807099" (or > > similar syntax) is just as conforming as any other syntax. > > > > The interesting point of the RFC is that the CIDs must be globally > > unique but it apparently leaves it for the implementors to be clever > > enough not to have the same idea. > > > > It depends if you want to break common practice. > > I don't think that's right. Looking at RFC 2111 we find: > > content-id = url-addr-spec > > and > > url-addr-spec = addr-spec ; URL encoding of RFC 822 addr-spec > > Then consulting RFC 822 we find: > > addr-spec = local-part "@" domain > > However, I think we don't have to use a UUID for the local-part, we > could use a hash. > > > The hostname is just useless for the XMPP purposes. But if we keep it > > for common practice, I'd suggest a constant one then (as it's useless > > anyway). > > I don't see a use for it now, but that doesn't mean it's useless. > However, I'm OK with hardcoding it to bob.xmpp.org or something. > > > If we need metadata to specify the origin, we can add an > > additional optional metadata element inside the <data/>. > > Sure, we could do that. So something like this? > > <data cid='[EMAIL PROTECTED]' > origin='http://bundles.jabbim.cz/'/> > > Peter
Seems nice. We should specify the hash algorithm in the cid somehow though. I don't know what the common practice for that would be. And since we use hash now, we don't need to cache per JID. Actually the idea (I talked with Pavel by IM a bit) is that client a) either uses hash, checks the incoming data and caches per hash or b) doesn't know the hash or hash wasn't used or doesn't support hashes and then caches per JID and per the unique string. I hope I got it right and clear :-). -- Stop Skype Plague XMPP Jabber ID: [EMAIL PROTECTED]
