Django Time-Token File Storage
This is a simple extension to Django’s FileSystemStorage that adds a URL parameter carrying a shared token, which is only valid for a defined period of time.
This is a drop-in replacement for the Django FileSystemStorage, usable if media files are served by Django itself. It does currently not work if media files are served from an independent web server.
The storage and its accompanying view do the following:
When a URL to a storage file is generated, a HMAC-based token is generated
The token and the timestamp when it was generated are appended as request parameters to the URL
Upon retrieval of the file through the accompanying view, the requested file name and the passed timestamp are used to recalculate the HMAC-based token
Only if the tokens match, and a configured timeout has not passed, is the file served
The HMAC-based token ensures that the token is invalidated when:
The filename changes
The timestamp changes
The mtime of the file changes
The SECRET_KEY changes
The HMAC is salted with the SECRET_KEY.
To add django-titofisto to a project, first add it as dependency to your project, e.g. using poetry:
$ poetry add django-titofisto
django-titofisto will use the base FileSystemStorage for almost everything, including determining the MEDIA_ROOT. It merely adds a token as URL parameter to whatever the base FileSystemStorage.url() method returns.
Add the following to your settings:
DEFAULT_FILE_STORAGE = "titofisto.TitofistoStorage" TITOFISTO_TIMEOUT = 3600 # optional, this is the default TITOFISTO_PARAM_PREFIX = "titofisto_" # optional, this is the default
Add the following to your URL config:
from django.conf import settings from django.urls import include, path urlpatterns += [ path(settings.MEDIA_URL, include("titofisto.urls")), ]
Django will start serving media files under the configured MEDIA_URL.
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