python - Django : how to delete file record after user close his page? -

i'm making simple file resizer django, there 3 fields, email, size, image.

after user arrives last view can download resized, i'd django erase image of imagefield save space on django project whenever user close window final view page.

i want keep email , size is, these things shouldn't deleted.

i have no idea search, looked stackoverflows posts , in django google groups articles not find me, suggestion on how can done ?

https://developer.mozilla.org/en-us/docs/web/api/windoweventhandlers/onunload - can try using method handle browser close tab js , send request django.

but in place prefer timeout after images resized time ago removed (it can done simple cron script, possibly management command).