How to limit the whole size of a topic

I've discovered some users uploading attachments greater than 10Mb in some topics under our Foswiki instalation. After reading http://foswiki.org/Support/Question283 and http://foswiki.org/Support/Question202 , I have set ATTACHFILESIZELIMIT = 10000 into System/DefaultPreferences topic and now each attachment is limited to 10Mb.

After this change, our users are starting to upload multiple files into the same topic with a maximum of 10Mb each. Obviously due to the restriction above. I found some topics with 10 attachments with 10Mb each, which makes a sum of +100Mb.

How can I limit the whole size that a topic can have as a maximum (including body + attachments)?

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AFAIK this is not possible, but might be doable with a plugin - probably something that hooks into the beforeSaveHandler, checks how large the topic might be and then denies the save if necessary.

-- PaulHarvey - 08 Sep 2010

Building on AttachmentListPlugin you could add up all current attachment sizes and set the ATTACHFILESIZELIMIT.

-- ArthurClemens - 08 Sep 2010