Quoting Patrick Boutilier <[email protected]>:
From http://wiki.horde.org/Project/HordeImapLib :
"Horde_Imap_Client was responsible for features added to imapproxy
to eliminate the need to re-establish the session every time a user
accesses the server. Horde_Imap_Client is the ONLY open-source PHP
library that leverages these features."
Does Horde_Imap_Client still benefit from using imapproxy or is the
need for imapproxy gone?
Absolutely it still benefits. Web applications are inherently
stateless by design; the full environment needs to be recreated every
time a browser makes a connection to a server. Imapproxy (mostly)
eliminates the overhead of creating the authenticated network
connection between the PHP server and the IMAP server. This is a
significant savings of resources.
IMP goes even further by leveraging the new features of imapproxy to
also skip re-configuring this connection. Even when using imapproxy,
a client still needs to re-initialize the IMAP session since it can
not be sure whether the proxy is re-using an old connection, or it had
to create a new connection. IMAP session initialization includes the
following:
* Setting the language on the server (RFC 5255)
* Enabling CONDSTORE (RFC 4551) or QRESYNC (RFC 5162) via the ENABLE
(RFC 5161) command
* Sending ID information (RFC 2971) - although this needs to be added
as it is not currently done automatically
All other webmail clients, even if using imapproxy, need to perform
these tasks on every page access. This is a significant savings in
time/network bandwidth. E.g.:
2 ID ("name" "foo" "version" "1.0")
* ID ("name" "foo2" "version" "bar2" "os" "linux")
2 OK ID completed
3 ENABLE QRESYNC
* ENABLED QRESYNC
3 OK Enabled.
4 LANGUAGE DE
* LANGUAGE (DE)
* NAMESPACE (("" "/")) (("Other Users/" "/" "TRANSLATION" ("Andere
Ben&APw-tzer/"))) (("Public Folders/" "/" "TRANSLATION" ("Gemeinsame
Postf&AM8-cher/")))
4 OK Sprachwechsel durch LANGUAGE-Befehl ausgefuehrt
will only need to be sent once in IMP if using imapproxy.
michael
___________________________________
Michael Slusarz [[email protected]]
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