Django Storages with Boto3 and additional Metadata only for Media

I have a personal project which I’m using python with Django and django-storages to upload my static and media files to Amazon S3, because my media files have UUID and they’re not editable on my system I wanted to have a long expiration time on it, so I could save some bandwidth but I didn’t want this on the static files which are updated more regularly when I’m updating the system.

Most of resources refer to AWS_HEADERS but it didn’t work for me. It seems it is only for boto (not boto3) after looking into boto3 source code I discovered AWS_S3_OBJECT_PARAMETERS which works for boto3, but this is a system-wide setting, so I had to extend S3Boto3Storage.

So the code that solved my problem was:

class MediaRootS3Boto3Storage(S3Boto3Storage):
    location = 'media'
    object_parameters = {
        'CacheControl': 'max-age=604800'
    }

If you’re using boto (not boto3) and you want to have specific parameters only for Media classes you could use

class MediaRootS3Boto3Storage(S3BotoStorage):
    location = 'media'
    headers = {
        'CacheControl': 'max-age=604800'
    }

You also need to update your django-storages settings, pay attention to the class name, on boto 3 it is S3Boto3Storage on boto it doesn’t has the 3 after Boto.

DEFAULT_FILE_STORAGE = 'package.module.MediaRootS3Boto3Storage'

Very simple tip, but it took a while to find out how it works

Matheus