How to set-up a Django project with django-storages and Amazon S3, but with different folders for static files and media files?

I think the following should work, and be simpler than Mandx's method, although it's very similar:

Create a s3utils.py file:

from storages.backends.s3boto import S3BotoStorage

StaticRootS3BotoStorage = lambda: S3BotoStorage(location='static')
MediaRootS3BotoStorage  = lambda: S3BotoStorage(location='media')

Then in your settings.py:

DEFAULT_FILE_STORAGE = 'myproject.s3utils.MediaRootS3BotoStorage'
STATICFILES_STORAGE = 'myproject.s3utils.StaticRootS3BotoStorage'

A different but related example (that I've actually tested) can be seen in the two example_ files here.

I'm currently using this code in a separated s3utils module:

from django.core.exceptions import SuspiciousOperation
from django.utils.encoding import force_unicode

from storages.backends.s3boto import S3BotoStorage


def safe_join(base, *paths):
    """
    A version of django.utils._os.safe_join for S3 paths.

    Joins one or more path components to the base path component intelligently.
    Returns a normalized version of the final path.

    The final path must be located inside of the base path component (otherwise
    a ValueError is raised).

    Paths outside the base path indicate a possible security sensitive operation.
    """
    from urlparse import urljoin
    base_path = force_unicode(base)
    paths = map(lambda p: force_unicode(p), paths)
    final_path = urljoin(base_path + ("/" if not base_path.endswith("/") else ""), *paths)
    # Ensure final_path starts with base_path and that the next character after
    # the final path is '/' (or nothing, in which case final_path must be
    # equal to base_path).
    base_path_len = len(base_path) - 1
    if not final_path.startswith(base_path) \
       or final_path[base_path_len:base_path_len + 1] not in ('', '/'):
        raise ValueError('the joined path is located outside of the base path'
                         ' component')
    return final_path


class StaticRootS3BotoStorage(S3BotoStorage):
    def __init__(self, *args, **kwargs):
        super(StaticRootS3BotoStorage, self).__init__(*args, **kwargs)
        self.location = kwargs.get('location', '')
        self.location = 'static/' + self.location.lstrip('/')

    def _normalize_name(self, name):
        try:
            return safe_join(self.location, name).lstrip('/')
        except ValueError:
            raise SuspiciousOperation("Attempted access to '%s' denied." % name)


class MediaRootS3BotoStorage(S3BotoStorage):
    def __init__(self, *args, **kwargs):
        super(MediaRootS3BotoStorage, self).__init__(*args, **kwargs)
        self.location = kwargs.get('location', '')
        self.location = 'media/' + self.location.lstrip('/')

    def _normalize_name(self, name):
        try:
            return safe_join(self.location, name).lstrip('/')
        except ValueError:
            raise SuspiciousOperation("Attempted access to '%s' denied." % name)

Then, in my settings module:

DEFAULT_FILE_STORAGE = 'myproyect.s3utils.MediaRootS3BotoStorage'
STATICFILES_STORAGE = 'myproyect.s3utils.StaticRootS3BotoStorage'

I got to redefine the _normalize_name() private method to use a "fixed" version of the safe_join() function, since the original code is giving me SuspiciousOperation exceptions for legal paths.

I'm posting this for consideration, if anyone can give a better answer or improve this one, it will be very welcome.

---

File: PROJECT_NAME/custom_storages.py

from django.conf import settings
from storages.backends.s3boto import S3BotoStorage

class StaticStorage(S3BotoStorage):
    location = settings.STATICFILES_LOCATION

class MediaStorage(S3BotoStorage):
    location = settings.MEDIAFILES_LOCATION

File: PROJECT_NAME/settings.py

STATICFILES_LOCATION = 'static'
MEDIAFILES_LOCATION = 'media'

if not DEBUG:
    STATICFILES_STORAGE = 'PROJECT_NAME.custom_storages.StaticStorage'
    DEFAULT_FILE_STORAGE = 'PROJECT_NAME.custom_storages.MediaStorage'
    AWS_ACCESS_KEY_ID = 'KEY_XXXXXXX'
    AWS_SECRET_ACCESS_KEY = 'SECRET_XXXXXXXXX'
    AWS_STORAGE_BUCKET_NAME = 'BUCKET_NAME'
    AWS_HEADERS = {'Cache-Control': 'max-age=86400',}
    AWS_QUERYSTRING_AUTH = False

And run: python manage.py collectstatic