def export(event: Event, shredders: List[str], session_key=None) -> None: known_shredders = event.get_data_shredders() with NamedTemporaryFile() as rawfile: with ZipFile(rawfile, 'w') as zipfile: ccode = get_random_string(6) zipfile.writestr( 'CONFIRM_CODE.txt', ccode, ) zipfile.writestr( 'index.json', json.dumps( { 'instance': settings.SITE_URL, 'organizer': event.organizer.slug, 'event': event.slug, 'time': now().isoformat(), 'shredders': shredders, 'confirm_code': ccode }, indent=4)) for s in shredders: shredder = known_shredders.get(s) if not shredder: continue it = shredder.generate_files() if not it: continue for fname, ftype, content in it: zipfile.writestr(fname, content) rawfile.seek(0) cf = CachedFile() cf.date = now() cf.filename = event.slug + '.zip' cf.type = 'application/zip' cf.session_key = session_key cf.web_download = True cf.expires = now() + timedelta(hours=1) cf.save() cf.file.save(cachedfile_name(cf, cf.filename), rawfile) return cf.pk