Message store events notification

[Michel Sébastien]

-----Message d'origine-----
De : Bron Gondwana [mailto:brong at fastmail.fm]
Envoyé : vendredi 17 mai 2013 06:19
À : Michel Sébastien; Cyrus Devel
Objet : Re: Message store events notification


On Tue, Sep 20, 2011, at 06:44 PM, Sébastien Michel wrote:
> Hi all,
>
> progress is being made in the rewrite of our code toward the master branch.
> I pushed an update in our github repository, below the changelog :
>
> 1) adding the support of these event types:
> - MessageAppend
> - MessageExpire

> We're looking to use the NEW and APPEND events to send notifications to users including a link which can take them directly to the message.
>
> To do this, we need to know what UID it was given - but looking at the code we have this:
>
> 5f395e9c (Sébastien Michel 2012-08-08 17:33:39 +0200  331) static int mboxevent_expected_param(enum event_type type, enum event_param pa 5f395e9c (Sébastien Michel 2012-08-08 > 17:33:39 +0200  332) { [...]
> 5f395e9c (Sébastien Michel 2012-08-08 17:33:39 +0200  390)     case EVENT_UIDSET:
> 5f395e9c (Sébastien Michel 2012-08-08 17:33:39 +0200  391)      if (type & (EVENT_MESSAGE_NEW|EVENT_MESSAGE_APPEND))
> 5f395e9c (Sébastien Michel 2012-08-08 17:33:39 +0200  392)          return 0;
> 5f395e9c (Sébastien Michel 2012-08-08 17:33:39 +0200  393)      break;
>
> Is there any reason why you don't return the uidset in _NEW or _APPEND?

Yes, it is stated in the RFC 5423 :
> uidset
>      Included with MessageExpires, MessageExpunges, MessageRead,
>      MessageTrash, FlagsSet, and FlagsClear.

>      This includes the set of IMAP UIDs referenced.

Regarding MessageNew (it's the same for MessageAppend) :
>MessageNew
>      A new message was received into a mailbox via a message delivery
>      agent.
>
>     The parameters include a message identifier that, for IMAP-
>      accessible message stores, MUST include UIDVALIDITY and a UID. [...]

> The other place that might make sense is in the URI itself.  What do you think?
You're right, and it is defined as you expect in the RFC :

> uri
>      Included with all notifications.  A reference to the IMAP server,
>      a mailbox, or a message.
>
>      Typically an IMAP URL.  This can include the name of the server
>      used to access the mailbox/message, the mailbox name, the
>      UIDVALIDITY of the mailbox, and the UID of a specific message.

below an example :

{
   "event":"MessageNew",
   "timestamp":"2013-05-14T18:49:48.411+02:00",
  "service":"lmtp",
  "uri":"imap://testsmi@127.0.0.3/INBOX;UIDVALIDITY=1310590327/;UID=84",
  "modseq":140,
  "messages":57,
  "vnd.cmu.unseenMessages":54,
  "uidnext":85,
  "vnd.cmu.midset":["<cmu-lmtpd-30196-1368550188-0 at 127.0.0.3>"],
  "messageSize":818,
  "bodyStructure":"(\"TEXT\" \"PLAIN\" (\"CHARSET\" \"us-ascii\") NIL NIL \"7BIT\" 39 4 NIL NIL NIL NIL)",
  "messageContent": ...
}


Sébastien


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