Comment 4 for bug 1153614

Hi Mark,

The copy_from policy could be considered one of the pieces required to support an implied policy: only allow data upload/download via the API endpoint. ie if you combine it with set_image_location and also pare down the 'known_stores'
store types this is the behaviour you get.

Why might you want to turn off copy_from?

1) Network hardware: you may want all data to be pushed through your load balancers/rate limiters. The copy from means uploaded data would go straight to your server, bypassing the usual upload path
2) Secure sites: You may have a site policy mandating that all traffic uses SSL. If the swift store is enabled you could copy from a plain http swift store .