Remote Storages

In some cases it’s useful to use a CDN for serving static files such as those generated by Django Compressor. Due to the way Django Compressor processes files, it requires the files to be processed (in the {% compress %} block) to be available in a local file system cache.

Django Compressor provides hooks to automatically have compressed files pushed to a remote storage backend. Simply set the storage backend that saves the result to a remote service (see COMPRESS_STORAGE).


So assuming your CDN is Amazon S3, you can use the boto storage backend from the 3rd party app django-storages. Some required settings are:

AWS_STORAGE_BUCKET_NAME = 'compressor-test'

Next, you need to specify the new CDN base URL and update the URLs to the files in your templates which you want to compress:



For staticfiles just set STATIC_URL = COMPRESS_URL

The storage backend to save the compressed files needs to be changed, too:

COMPRESS_STORAGE = 'storages.backends.s3boto.S3BotoStorage'

Using staticfiles

If you are using Django’s staticfiles contrib app, you’ll need to use a temporary filesystem cache for Django Compressor to know which files to compress. Since staticfiles provides a management command to collect static files from various locations which uses a storage backend, this is where both apps can be integrated.

  1. Make sure the COMPRESS_ROOT and STATIC_ROOT settings are equal since both apps need to look at the same directories when doing their job.

  2. You need to create a subclass of the remote storage backend you want to use; below is an example of the boto S3 storage backend from django-storages:

    from import get_storage_class
    from storages.backends.s3boto import S3BotoStorage
    class CachedS3BotoStorage(S3BotoStorage):
        S3 storage backend that saves the files locally, too.
        def __init__(self, *args, **kwargs):
            super(CachedS3BotoStorage, self).__init__(*args, **kwargs)
            self.local_storage = get_storage_class(
        def save(self, name, content):
            self.local_storage._save(name, content)
            super(CachedS3BotoStorage, self).save(name, self.local_storage._open(name))
            return name
  3. Set your COMPRESS_STORAGE and STATICFILES_STORAGE settings to the dotted path of your custom cached storage backend, e.g. ''.

  4. To have Django correctly render the URLs to your static files, set the STATIC_URL setting to the same value as COMPRESS_URL (e.g. "").

In the end it might look like this:

STATIC_ROOT = '/path/to/staticfiles'