Django app that caches CDN files for use when coding offline
Project description
This app is to help in those situations where you can’t get on the network but you want to write some Django code. Surround your static CDN references (like jquery and the like) with this template tag and when you turn it on the URLs will be re-written from a local copy.
Installation
In your settings file, add ‘airplane’ to your settings.INSTALLED_APPS field:
INSTALLED_APPS = (
...
'airplane',
)Also in settings, make the following additions:
import airplane
STATICFILES_DIRS = (
airplane.cache_path(),
)
AIRPLANE_MODE = airplane.BUILD_CACHE
#AIRPLANE_MODE = airplane.USE_CACHE
#AIRPLANE_MODE = airplane.AUTO_CACHENow use the airplane tag in your templates
{% load airplanetags %}
<html>
<head>
<link rel="stylesheet"
href="{% airplane 'https://maxcdn.bootstrapcdn.com/bootstrap.min.css' %}">
</head>
</html>Change the AIRPLANE_MODE setting to airplane.USE_CACHE and subsequent calls to the {% airplane %} tag will return a reference to the locally cached version.
Settings
Airplane only does something if DEBUG=True and if you have an AIRPLANE_MODE value set to airplane.BUILD_CACHE, airplane.USE_CACHE, or airplane.AUTO_CACHE. If one of these conditions is not met, the tag simply returns the value passed in.
For example, if DEBUG=False and your template contains:
<link rel="stylesheet"
href="{% airplane 'https://maxcdn.bootstrapcdn.com/bootstrap.min.css' %}">Then the above snippet renders as:
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap.min.css">When AIRPLANE_MODE is set to airplane.BUILD_CACHE any URLs passed in are fetched and their contents added to a local cache. The default local cache is .airport_cache relative to the base directory of your project.
You can change the location of the cache by setting AIRPLANE_CACHE. The setting accepts either fully qualified paths or paths relative to the project’s base directory.
# settings.py
AIRPLANE_CACHE = /foo/bar/cache # fully qualified
# or
AIRPLANE_CACHE = my_cache # relative to settings.BASE_DIR
# or nothing, defaults to settings.BASEDIR + '.airplane_cache'Once you have cached all the files you are using, switch AIRPLANE_MODE to airplane.USE_CACHE. All URLs are now re-written to point to the contents of the local cache.
Alternatively, you can set AIRPLANE_MODE to airplane.AUTO_CACHE and the first call will cache the file and subsequent calls will use the cached copy.
Commands
The following django commands come with airplane.
airinfo
$ ./manage.py airinfo
Cache mode: AUTO_CACHE
Cache directory: /Users/foo/sample_site/.airplane_cache
Cache contents:
https://maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.cssThis command takes no arguments and displays information about the cache. The current mode, the path of the directory and any items cached inside are shown.
aircache
./manage.py aircache https://stackpath.bootstrapcdn.com/bootstrap/4.1.3/css/bootstrap.min.cssThis command takes a single URL as an argument and caches the contents of the URL.
Schemaless URLs
As airplane is a template tag library, it doesn’t have access to the request object at execution. In order to allow schemaless URLs, the code makes the assumption that the schema is “https” if it is not given in the URL.
Supports
django-airplane has been tested with:
Python 3.6, 3.7 and Django 2.2
Python 3.6, 3.7 and Django 3.0
Docs
Docs available at: http://django-airplane.readthedocs.io/en/latest/
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