I'm David Little, a user experience researcher and designer

Plone and Flash Player 10

Posted: October 17, 2008

Another pyrrhic victory maybe, but something that has made me exceptionally happy this afternoon. Basically, yesterday I upgraded my version of Flash Player to version 10 only to find that the Flash files on our Plone-powered site no longer worked.

The lovely folks at SWFObject helped to identify why this was happening — nothing to do with SWFObject at all but the fact that Flash Player 10 implements some new security “features”. I managed to isolate it to the fact that Plone serves up ATFiles with the header, “Content-Disposition: attachment”. Flash Player 10 ignores files served up with this header, so you need to override this and set it to “Content-Disposition: inline;”.

I came up with this solution which may not be overly elegant but at least it works. I created a skin-level Python script that sets response headers before returning the file:

request = container.REQUEST
flashvid = request['flashvid']
cd = 'inline; filename=%s' %(context.id)
RESPONSE.setHeader('Content-Disposition', cd)
return context[flashvid]

Then, when I embed the video with SWFObject I call it thus,

<script type="text/javascript">
swfobject.embedSWF("&dtml-portal_url;/path/to/flash/showflash?flashvid=myflash.swf", "my-dom-id", "435", "290", "9.0.115");

This may be better handled by a product like Plone4Artists Video but it certainly works as a fix for us.

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