def delete(stored_file):
"""
Delete all the thumbnails and images associated with a file, from local cache and S3.
Wait for the upload/resize to complete if queued for the same image.
"""
if not app.config.get('CELERY_ALWAYS_EAGER'):
wait_for_asynctasks(stored_file)
# remove locally
cache_path = app.config.get('UPLOADED_FILES_DEST')
cached_img_path = os.path.join(cache_path, '%s*' % stored_file.name)
for f in glob(cached_img_path):
os.remove(f)
# remove on s3
extn = stored_file.extn
# lazy loads don't work - so, no `stored_file.thumbnails`
thumbnails = Thumbnail.query.filter_by(stored_file=stored_file).all()
keys = [(get_s3_folder() + thumbnail.name + extn) for thumbnail in thumbnails]
keys.append(get_s3_folder() + stored_file.name + extn)
bucket = get_s3_bucket()
bucket.delete_keys(keys)
# remove from the db
# remove thumbnails explicitly.
# cascade rules don't work as lazy loads don't work in async mode
Thumbnail.query.filter_by(stored_file=stored_file).delete()
db.session.delete(stored_file)
db.session.commit()
def save_on_s3(filename, remotename='', content_type='', bucket='', folder=''):
"""
Save contents from file named `filename` to `remotename` on S3.
"""
b = bucket or get_s3_bucket()
folder = get_s3_folder(folder)
with open(path_for(filename)) as fp:
filename = remotename or filename
k = b.new_key(folder+filename)
headers = {
'Cache-Control': 'max-age=31536000', # 60*60*24*365
'Content-Type': get_file_type(fp),
}
k.set_contents_from_file(fp, policy='public-read', headers=headers)
return filename