Django pyfilesystem integration
|pypi-badge| |ci-badge| |codecov-badge| |pyversions-badge| |license-badge|
A Django module which extends pyfilesystem2 with several methods to make it convenient for web use. Specifically, it extends pyfilesystem2 with two methods:
.. code-block::
fs.get_url(filename, timeout=0)
This will return a externally-usable URL to the resource. If timeout>0, the URL may stop working after that period (in seconds). Details are implementation-dependent. On Amazon S3, this is a secure URL, which is only available for that period. For a static filesystem, the URLs are unsecure and permanent.
.. code-block::
fs.expire(filename, seconds, days, expires=True)
This allows us to create temporary objects. Our use-case was that we wanted to generate visualizations to users which were .png images. The lifetime of those images was a single web request, so we set them to expire after a few minutes. Another use case was memoization.
Note that expired files are not automatically removed. To remove them,
call expire_objects()
. In our system, we had a cron job do
this for a while. Celery, manual removals, etc. are all options.
To configure a openedx-django-pyfs to use static files, set a parameter in Django settings:
.. code-block::
DJFS = {'type' : 'osfs',
'directory_root' : 'djpyfs/static/djpyfs',
'url_root' : '/static/djpyfs'}
Here, directory_root
is where the files go. url_root
is the URL
base of where your web server is configured to serve them from.
To use files on S3, you need boto
installed. Then,
.. code-block::
DJFS = {'type' : 's3fs',
'bucket' : 'my-bucket',
'prefix' : '/pyfs/' }
bucket
is your S3 bucket. prefix
is optional, and gives a base
within that bucket.
To get your filesystem, call:
.. code-block::
def get_filesystem(namespace)
Each module should pass a unique namespace. These will typically correspond to subdirectories within the filesystem.
The openedx-django-pyfs interface is designed as a generic (non-Django specific) extension to pyfilesystem2. However, the specific implementation is very Django-specific.
Good next steps would be to:
State: This code is tested and has worked well in a range of settings, and is currently deployed on edx.org.
.. |pypi-badge| image:: https://img.shields.io/pypi/v/openedx-django-pyfs.svg :target: https://pypi.python.org/pypi/openedx-django-pyfs/ :alt: PyPI
.. |ci-badge| image:: https://github.com/openedx/django-pyfs/workflows/Python%20CI/badge.svg?branch=master :target: https://github.com/openedx/django-pyfs/actions?query=workflow%3A%22Python+CI%22 :alt: Github CI
.. |codecov-badge| image:: http://codecov.io/github/openedx/django-pyfs/coverage.svg?branch=master :target: http://codecov.io/github/openedx/django-pyfs?branch=master :alt: Codecov
.. |pyversions-badge| image:: https://img.shields.io/pypi/pyversions/openedx-django-pyfs.svg :target: https://pypi.python.org/pypi/openedx-django-pyfs :alt: Supported Python versions
.. |license-badge| image:: https://img.shields.io/github/license/openedx/django-pyfs.svg :target: https://github.com/openedx/django-pyfs/blob/master/LICENSE.txt :alt: License