Mozilla Product Details for Django
From the original README file:
This library holds information about the current builds of Firefox and Thunderbird that Mozilla ships including: - Latest version numbers for all builds - English and Native names for all languages we support
This is a Django app allowing this data to be used in Django projects. A Django management command can be used as a cron job or called manually to keep the data in sync with Mozilla.
The data source of Mozilla Product Details is a PHP library kept
on the Mozilla SVN server, and was originally written so it could be included
into PHP projects via an SVN external. A simple
svn up would
fetch the latest data when it became available.
In the meantime, the Product Details library received an additional JSON feed, allowing non-PHP projects to consume the data. If, however, the consumer is not kept in SVN like the library is, there is no easy way to keep the data up to date.
For Django projects, this app solves that problem.
Install this library using
pip install -e git://github.com/fwenzel/django-mozilla-product-details#egg=django-mozilla-product-details
... or by downloading the
product_details directory and dropping it into
your django project.
product_details to your
INSTALLED_APPS to enable the management
No configuration should be necessary. However, you can add and alter the
following settings to your
settings.py file if you disagree with the
PROD_DETAILS_URLdefaults to the JSON directory on the Mozilla SVN server. If you have a secondary mirror at hand, or you want this tool to download completely unrelated JSON files from somewhere else, adjust this setting. Include a trailing slash.
PROD_DETAILS_DIRis the target directory for the JSON files. It needs to be writable by the user that'll execute the management command, and readable by the user running the Django project. Defaults to:
Updating the feed
To update the data, execute this:
You want to run this once manually after installing the app. To periodically pull in new data, you can make this a cron job.
Note: Please be considerate of the server when adding a cron job. The data does not change often enough to warrant an update every minute or so. Most applications will run perfectly fine if you pull new data once a day or even less frequently. When in doubt, contact the author of this library.
Using the data
To use the data, just import the library:
from product_details import product_details
The library turns all imported JSON files automatically into Python objects. The contents are perhaps best inspected using IPython.
Product details comes with an implementation of version comparison code for Mozilla-style product versions. Use it like this:
>>> from product_details.version_compare import Version >>> v1 = Version('4.0b10') >>> v2 = Version('4.0b10pre') >>> v1 < v2 False
The second useful part of the version compare code is generating a list of unique versions, sorted by their release date, like this:
>>> from product_details import product_details >>> from product_details.version_compare import version_list >>> version_list(product_details.firefox_history_development_releases) ['3.6.4', '3.6.3', '3.6', '3.6b5', '3.6b4', '3.6b3', '3.6b2', ... ]
Caveats / Known Issues
While the management task will not overwrite existing files if the server returns bogus data (i.e., an empty document or unparseable JSON data), this library will also never delete a JSON file that was completely removed from the server. This is unlikely to happen very often, though.
You don't want to
settings.pyas that would cause an import loop (since product_details itself imports
django.conf.settings). However, if you must, you can lazily wrap the import like this, mitigating the problem:
from django.utils.functional import lazy MY_LANGUAGES = ('en-US', 'de') class LazyLangs(list): def __new__(self): from product_details import product_details return [(lang.lower(), product_details.languages[lang]['native']) for lang in MY_LANGUAGES] LANGUAGES = lazy(LazyLangs, list)()
Patches are welcome.
To run tests, install
nose and run
nosetests from the project root.