Comment 18 for bug 1203240

(In reply to comment #5)
> (In reply to comment #4)
> > It can be used between sessions if webkit gives an appropriate name to the
> > files IIRC. But yes, it should probably go into g_get_tmp_dir(). Main
> > problem with that is that some people put /tmp on a tmpfs... so if you want
> > to watch a long enough movie, your memory runs full.
>
> /tmp on tmpfs has been default in Fedora for several years now... I was
> amazed quite recently to learn that other distros are still not doing this.
> Anyway, the videos would have to go in /var/tmp since they are big. But
> /var/tmp is not cleaned automatically, so there needs to be some measure to
> clean up leaked videos in the event of a web process crash.

A naive suggestion would be to treat /var/tmp as system storing /tmp on disk treat it. Those systems clean /tmp on boot. My suggestion is to use /var/tmp/${USER}/WebKit-media (or some better name) as "tmp", and not cleaning it at webprocess' death (which can be uncontrolled in the very worst case), but at WebKit start. Each time WebKit starts, it cleans the previous "tmp".

More efficient approaches can be implemented on top of that, but I think this one could be fine as a baseline.