[Dovecot] IMAP-proxy or not with sogo webmail and dovecot backend

Ed W lists at wildgooses.com
Wed Feb 22 11:38:47 EET 2012

On 21/02/2012 20:36, Timo Sirainen wrote:
> On 21.2.2012, at 16.33, Ed W wrote:
>> I'm also pleased to see that there is little negative cost in using a proxy... I recently added imap-proxy to our webmail setup because I wanted to log "last login + logout" times.  I haven't quite figured out how to best log "logout time" (Timo, any chance of a post logout script? Or perhaps it's possible with the current login scripting?).
> You could of course grep the logs, but other than that you'd need to write a Dovecot plugin. Luckily it's really simple to write a plugin. Basically:
> void postlogout_init(struct module *module) { }
> void postlogout_deinit(void) {
>    system("/usr/local/bin/dovecot-postlogout.sh");
> }
> Add a few missing #includes and compile and enable for imap/pop3 and that should be it.

Thanks - that's really obvious and quite interesting.  I guess a simple 
"log" plugin makes sense.

Quick followup question - the logout log file currently logs a bunch of 
statistics such as mails read/deleted, bytes sent/received.  How might I 
access these from the _deinit context as above?  Apologies if this is a 
RTFM question?

Finally, do you see it feasible to offer a "scriptable" plugin 
interface, eg perhaps using some high performance scripting language 
such as lua?  Such a plugin might itself be simply a standard plugin..?  
The motivation being to offer the ability to create plugins to those who 
are nervous of using a compiler, and of course to reduce the ability of 
a badly written plugin to kill dovecot?


Ed W

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