Quoting Robert Schetterer <r...@sys4.de>:
Am 06.11.2012 13:17, schrieb Timo Sirainen:the only problem is activesync implementation using itHi, Michael, as i am going to implement horde 5 active sync server in near Future with dovecot , i followed this in high interest I know horde active sync server is different to z-push so sorry my question, i recent use z-push with dovecot and never noticed any problems with it, so how does z-push handle this "problem" comparing horde, any chance to workaround it in horde code ?
ZPush's default "imap backend" implementation uses PHP's imap implementation, which has _many_ problems. Horde's uses Horde_Imap_Client a PHP native implementation with tons of improvements over just about any other available IMAP client implementation in PHP.
The problem I'm describing stems from our ActiveSync code trying to take advantage of IMAP extensions such as QRESYNC, where the server can track and report things like expunged messages, flag changes etc... since a known point without us having to cache and track every bit of information about the device's state. This is what ZPush does, it uses plaintext files on the server and writes out all the message ids and flag states that were sent to each device. Then during every sync, it retrieves the complete list of message ids and flag state from the IMAP server again and compares them against the data in the text file to determine the deltas.
There is already a work around for this in place - if we detect a UID being returned from one of these VANISHED responses that is older than the oldest known UID we know was sent to the device then we reset the device's mailbox state, causing the mailbox to resync.
We already track the UIDs of all email sent to the device in our state tables when using a server that does not support QRESYNC, I plan on extending/improving this and getting rid of the current use VANISHED data completely.
For further information about our code vs ZPush you can read a basic overview on our wiki page http://wiki.horde.org/ActiveSync. I'm in the process of a more detailed feature comparison grid, but it's far from ready.
Please move any further discussion specific to Horde's ActiveSync code to the d...@lists.horde.org mailing list.
Hacking dovecot might be complex, as it should fit in so many stuff and setups
I would never suggest people should hack server code to get other code to work :)
Anyway i agree many people using active sync in their smartphone these days and new outlook will also have a active sync mode, so there shouldnt stay any fixable problems ( where ever they may be ), but in my understanding the imap server ( dovecot ) acts more like a backhand here did you test against recent versions of cyrus etc, how is their behave in this case?
I have not personally tested against cyrus, but I know some of our other devs use cyrus with the ActiveSync code base.
-- mike The Horde Project (www.horde.org) mrubi...@horde.org
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