enable caching for signed s3 urls

cookbook/helper/CustomStorageClass.py

@@ -0,0 +1,19 @@
+import hashlib
+
+from django.conf import settings
+from django.core.cache import cache
+from storages.backends.s3boto3 import S3Boto3Storage
+
+
+class CachedS3Boto3Storage(S3Boto3Storage):
+    def url(self, name, **kwargs):
+        key = hashlib.md5(f'recipes_media_urls_{name}'.encode('utf-8')).hexdigest()
+        if result := cache.get(key):
+            return result
+
+        result = super(CachedS3Boto3Storage, self).url(name, **kwargs)
+
+        timeout = int(settings.AWS_QUERYSTRING_EXPIRE * .95)
+        cache.set(key, result, timeout)
+
+        return result