Care for tracks not being on SoundCloud anymore

[freenerd]

It happens, that we have tracks, that the user has deleted from SoundCloud again. When a track is displayed, we should check, if the track is present. If it is not, we should delete it from the datastore, give the user a notice and/or play the next track.

[ericw]

yep, you'll need to sniff specifically for a 404, otherwise when soundcloud is down or gives a 500, you would delete potentially a lot of tracks acting on the wrong information

[freenerd]

since citysounds already has a soluton for this I'm going to ask henrik for advice ...