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https://github.com/friedelwolff/django-compression-middleware

Django middleware to compress responses using several algorithms.
https://github.com/friedelwolff/django-compression-middleware

brotli content-encoding django gzip middleware zstandard zstd

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Django middleware to compress responses using several algorithms.

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README 

        
===========================================================================

Django Compression Middleware

===========================================================================



This middleware implements compressed content encoding for HTTP. It is similar

to Django's ``GZipMiddleware`` (`documentation`_), but additionally supports

other compression methods. It is meant to be a drop-in replacement for Django's

``GZipMiddleware``. Its documentation — including security warnings — therefore

apply here as well.



The middleware is focussed on the task of compressing typical Django responses

such as HTML, JSON, etc.  Both normal (bulk) and streaming responses are

supported. For static file compression, have a look at other projects such as

`WhiteNoise`_.



Zstandard is a new method for compression with little client support so far.

Most browsers now support Brotli compression (check support status on `Can I

use... Brotli`_). The middleware will choose the best compression method

supported by the client as indicated in the request's ``Accept-Encoding``

header. In order of preference:



- Zstandard (zstd)

- Brotli (br)

- gzip (gzip)



Summary of the project status:



* .. image:: https://img.shields.io/github/actions/workflow/status/friedelwolff/django-compression-middleware/main.yml

     :target: https://github.com/friedelwolff/django-compression-middleware/actions

* .. image:: https://img.shields.io/pypi/djversions/django-compression-middleware.svg

* .. image:: https://img.shields.io/pypi/pyversions/django-compression-middleware.svg

* .. image:: https://img.shields.io/pypi/implementation/django-compression-middleware.svg



.. _`documentation`: https://docs.djangoproject.com/en/dev/ref/middleware/#module-django.middleware.gzip

.. _`WhiteNoise`: https://whitenoise.readthedocs.io/

.. _`Can I use... Brotli`: http://caniuse.com/#search=brotli



Installation and usage

----------------------



The following requirements are supported and tested in all reasonable

combinations:



- Python versions: 2.7, 3.5–3.11

- Interpreters: CPython and PyPy.

- Django versions: 1.11–4.1



.. code:: shell



    pip install --upgrade django-compression-middleware



To apply compression to all the views served by Django, add

``compression_middleware.middleware.CompressionMiddleware`` to the

``MIDDLEWARE`` setting:



.. code:: python



    MIDDLEWARE = [

        # ...

        'compression_middleware.middleware.CompressionMiddleware',

        # ...

    ]



Remove ``GZipMiddleware`` and ``BrotliMiddleware`` if you used it before.

Consult the Django documentation on the correct `ordering of middleware`_.



.. _`ordering of middleware`: https://docs.djangoproject.com/en/dev/ref/middleware/#middleware-ordering



Alternatively you can decorate views individually to serve them with

compression:



.. code:: python



    from compression_middleware.decorators import compress_page



    @compress_page

    def index_view(request):

        ...



Note that your browser might not send the ``br`` entry in the ``Accept-Encoding``

header when you test without HTTPS (common on localhost). You can force it to

send the header, though. In Firefox, visit ``about:config`` and set

``network.http.accept-encoding`` to indicate support. Note that you might

encounter some problems on the web with such a setting (which is why Brotli is

only supported on secure connections by default).



Credits and Resources

---------------------



The code and tests in this project are based on Django's ``GZipMiddleware`` and

Vašek Dohnal's ``django-brotli``. For compression, it uses the following modules

to bind to fast C modules:



- The `zstandard`_ bindings. It supports both a C module (for CPython) and CFFI

  which should be appropriate for PyPy. See the documentation for full details.

- The `Brotli`_ bindings or `brotlipy`_. The latter is preferred on PyPy since

  it is implemented using cffi. But both should work on both Python

  implementations.

- Python's builtin `gzip`_ module.



.. _zstandard: https://pypi.org/project/zstandard/

.. _Brotli: https://pypi.org/project/Brotli/

.. _brotlipy: https://pypi.org/project/brotlipy/

.. _gzip: https://docs.python.org/3/library/gzip.html



Further readding on Wikipedia:



- `HTTP compression `__

- `Zstandard `__

- `Brotli `__

- `gzip `__



Contributing

------------



1. Clone this repository (``git clone ...``)

2. Create a virtualenv

3. Install package dependencies: ``pip install --upgrade -r requirements_dev.txt``

4. Change some code

5. Run the tests: in the project root simply execute ``pytest``, and afterwards

   preferably ``tox`` to test the full test matrix. Consider installing as many

   supported interpreters as possible (having them in your ``PATH`` is often

   sufficient).

6. Submit a pull request and check for any errors reported by the Continuous

   Integration service.



License

-------



The MPL 2.0 License



Copyright (c) 2019-2023 `Friedel Wolff `_.