[Zope] disable versions for an object ?

[J Cameron Cooper]

Thomas Bennett wrote:

> Is there a way to disable versions for a single object or another 
> solution?
>
>   My case in point is that I have an AXIS Video WEB cam that the 
> "Boss" wants a new shot sent to the server every 5 seconds.  Well I 
> got that part working fine because the camera is running an embedded 
> linux and ftp to a PhotoFolder object on the server so it would be a 
> Photo object.  I activated that sometime last week and it worked fine 
> until Sunday I got a call that users could not connect to the server.  
> The Data.fs file had grown to 40 times is usual size and filled up the 
> hard drive. No log entries could be written so I assumed that and 
> other processes that needed to write to the drive stopped services.  I 
> had to run Christoph Becker-Freyseng's  zodbpack.py on the live 
> Data.fs file(after stopping the server of course), after deleting some 
> large older log files and such, since there was nowhere to copy the 
> Data.fs file.  THANK YOU CHRISTOPH !!  I assume that Zope was keeping 
> a history version of each photo going to the server which would be 720 
> photos/hour.  So that is why I would want to disable history versions 
> for a single object.  In the mean time I am using LocalFS to serve the 
> file from the file system where a second FTP server is running to 
> receive the pictures but I can't show it as a Photo object without 
> running it through the Image2photo script.  I'd rather not resort to 
> setting  a ZCron or something to pack the live Data.fs every hour, day 
> or whenever.

Undo is specified only by Storage at the moment. You can try to find a 
non-Undo Storage (DirectoryStorage may have one, and I've seen one in 
the ZODB source, I think) or use APE to persist just that object (or 
just objects under the container of that object) to the filesystem.

> And while on the camera subject, is there a way I can send a login to 
> the camera for live video.  The page I have now connects to the camera 
> but a username/password box pops up On IE and Netscape.  I have a user 
> defined for view only but I don't want the person viewing to have to 
> login but rather it be automatic. I've tried 
> http://username:password@www.mycamera.site but this doesn't work and I 
> think recent security patches have disabled that format.

If you use CookieCrumbler, the cookie can be set to persist across 
browser sessions, I think. You could also hack together a way to grant 
access only upon receiving a certain hard-to-guess key in the URL 
parameters.

          --jcc

-- 
"He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you."