class S3BotoStaticStorage (to deploy of django `media` and `static` into two amazon bucket)

storages.py

from __future__ import absolute_import

import settings

from storages.backends.s3boto import S3BotoStorage
from boto.s3.connection import SubdomainCallingFormat

def getattr_backup(obj, key, backupkey, default):
    result = getattr(obj, key, None)
    if result is None:
        result = getattr(obj, backupkey, default)
    return result

ACCESS_KEY_NAME     = getattr_backup(settings, 'AWS_STATIC_ACCESS_KEY_ID', 'AWS_ACCESS_KEY_ID', None)
SECRET_KEY_NAME     = getattr_backup(settings, 'AWS_STATIC_SECRET_ACCESS_KEY', 'AWS_SECRET_ACCESS_KEY', None)
HEADERS             = getattr_backup(settings, 'AWS_STATIC_HEADERS', 'AWS_HEADERS', {})
STORAGE_BUCKET_NAME = getattr_backup(settings, 'AWS_STATIC_STORAGE_BUCKET_NAME', 'AWS_STORAGE_BUCKET_NAME', None)
AUTO_CREATE_BUCKET  = getattr_backup(settings, 'AWS_STATIC_AUTO_CREATE_BUCKET', 'AWS_AUTO_CREATE_BUCKET', False)
DEFAULT_ACL         = getattr_backup(settings, 'AWS_STATIC_DEFAULT_ACL', 'AWS_DEFAULT_ACL', 'public-read')
BUCKET_ACL          = getattr_backup(settings, 'AWS_STATIC_BUCKET_ACL', 'AWS_BUCKET_ACL', DEFAULT_ACL)
QUERYSTRING_AUTH    = getattr_backup(settings, 'AWS_STATIC_QUERYSTRING_AUTH', 'AWS_QUERYSTRING_AUTH', True)
QUERYSTRING_EXPIRE  = getattr_backup(settings, 'AWS_STATIC_QUERYSTRING_EXPIRE', 'AWS_QUERYSTRING_EXPIRE', 3600)
REDUCED_REDUNDANCY  = getattr_backup(settings, 'AWS_STATIC_REDUCED_REDUNDANCY', 'AWS_REDUCED_REDUNDANCY', False)
LOCATION            = getattr_backup(settings, 'AWS_STATIC_LOCATION', 'AWS_LOCATION', '')
CUSTOM_DOMAIN       = getattr_backup(settings, 'AWS_STATIC_S3_CUSTOM_DOMAIN', 'AWS_S3_CUSTOM_DOMAIN', None)
CALLING_FORMAT      = getattr_backup(settings, 'AWS_STATIC_S3_CALLING_FORMAT', 'AWS_S3_CALLING_FORMAT', SubdomainCallingFormat())
SECURE_URLS         = getattr_backup(settings, 'AWS_STATIC_S3_SECURE_URLS', 'AWS_S3_SECURE_URLS', True)
FILE_NAME_CHARSET   = getattr_backup(settings, 'AWS_STATIC_S3_FILE_NAME_CHARSET', 'AWS_S3_FILE_NAME_CHARSET', 'utf-8')
FILE_OVERWRITE      = getattr_backup(settings, 'AWS_STATIC_S3_FILE_OVERWRITE', 'AWS_S3_FILE_OVERWRITE', True)
IS_GZIPPED          = getattr_backup(settings, 'AWS_STATIC_IS_GZIPPED', 'AWS_IS_GZIPPED', False)
PRELOAD_METADATA    = getattr_backup(settings, 'AWS_STATIC_PRELOAD_METADATA', 'AWS_PRELOAD_METADATA', False)
GZIP_CONTENT_TYPES  = getattr_backup(settings, 'STATIC_GZIP_CONTENT_TYPES', 'GZIP_CONTENT_TYPES', (
    'text/css',
    'application/javascript',
    'application/x-javascript'
))

class S3BotoStaticStorage(S3BotoStorage):


    def __init__(self, bucket=STORAGE_BUCKET_NAME, access_key=None,
                       secret_key=None, bucket_acl=BUCKET_ACL, acl=DEFAULT_ACL, headers=HEADERS,
                       gzip=IS_GZIPPED, gzip_content_types=GZIP_CONTENT_TYPES,
                       querystring_auth=QUERYSTRING_AUTH, querystring_expire=QUERYSTRING_EXPIRE,
                       reduced_redundancy=REDUCED_REDUNDANCY,
                       custom_domain=CUSTOM_DOMAIN, secure_urls=SECURE_URLS,
                       location=LOCATION, file_name_charset=FILE_NAME_CHARSET,
                       preload_metadata=PRELOAD_METADATA, calling_format=CALLING_FORMAT):

        return super(S3BotoStaticStorage, self).__init__(
            bucket=bucket, access_key=None,
            secret_key=None, bucket_acl=bucket_acl, acl=acl, headers=headers,
            gzip=gzip, gzip_content_types=gzip_content_types,
            querystring_auth=querystring_auth, querystring_expire=querystring_expire,
            reduced_redundancy=reduced_redundancy,
            custom_domain=custom_domain, secure_urls=secure_urls,
            location=location, file_name_charset=file_name_charset,
            preload_metadata=preload_metadata, calling_format=calling_format
        )