A Django storage backend that names files by hash value.
By default, django.core.files.storage.FileSystemStorage deals with
conflicting filenames by appending an underscore and a random 7
character alphanumeric string to the file. For
instance, if you try to create hello.txt when it already exists,
it will rename it as e.g. hello_a12mkj3.txt.
django-hashedfilenamestorage creates hashed filenames, so if you
try to create hello.txt with the content Hello world!, it will
save it as d3486ae9136e7856bc42212385ea797094475802.txt. Directory
names and extensions are preserved, only the root filename is
changed. This reduces the number of duplicates stored in the
underlying backend, and implies that these files can be served from a
static cache that never expires.
The easiest way to install django-hashedfilenamestorage is to use
pip:
pip install django-hashedfilenamestorage
In your Django settings file:
- Set
DEFAULT_FILE_STORAGEto'django_hashedfilenamestorage.storage.HashedFilenameFileSystemStorage'
This gives you hashed filenames, backed on Django's
FileSystemStorage storage class.
You can define a new underlying storage class by using
HashedFilenameMetaStorage to wrap it:
from django.core.files.storage import get_storage_class
from django_hashedfilenamestorage.storage import HashedFilenameMetaStorage
HashedFilenameMyStorage = HashedFilenameMetaStorage(
storage_class=get_storage_class('myapp.storage.MyStorage'),
)
HashedFilenameMetaStorage is meant to generate duplicate filenames for files with identical contents. To do this, it reads the contents of the file and generates a SHA-1 hash of them.
Filenames have their extensions preserved, so it is possible to have duplicate contents on the filesystem, but it is important to help serve files with their proper content types.