django-htmlmin
django-html is an HTML minifier for Python, with full support for HTML 5. It supports Django, Flask and many other Python web frameworks. It also provides a command line tool, that can be used for static websites or deployment scripts.
Why minify HTML code?
One of the important points on client side optimization is to minify HTML. With minified HTML code, you reduce the size of the data transferred from the server to the client, which results in faster load times.
Installing
To install django-htmlmin, run this on the terminal: :
$ [sudo] pip install django-htmlmin
Using the middleware
All you need to do is add two middlewares to your MIDDLEWARE_CLASSES
and
enable the HTML_MINIFY
setting:
MIDDLEWARE_CLASSES = (
# other middleware classes
'htmlmin.middleware.HtmlMinifyMiddleware',
'htmlmin.middleware.MarkRequestMiddleware',
)
Note that if you're using Django's caching middleware,
MarkRequestMiddleware
should go after FetchFromCacheMiddleware
, and
HtmlMinifyMiddleware
should go after UpdateCacheMiddleware
:
MIDDLEWARE_CLASSES = (
'django.middleware.cache.UpdateCacheMiddleware',
'htmlmin.middleware.HtmlMinifyMiddleware',
# other middleware classes
'django.middleware.cache.FetchFromCacheMiddleware',
'htmlmin.middleware.MarkRequestMiddleware',
)
You can optionally specify the HTML_MINIFY
setting:
HTML_MINIFY = True
The default value for the HTML_MINIFY
setting is not DEBUG
. You only
need to set it to True
if you want to minify your HTML code when DEBUG
is enabled.
Excluding some URLs
If you don't want to minify all views in your app and it's under a /my_app
URL, you can tell the middleware to not minify the response of your views by
adding a EXCLUDE_FROM_MINIFYING
setting on your settings.py:
EXCLUDE_FROM_MINIFYING = ('^my_app/', '^admin/')
Regex patterns are used for URL exclusion. If you want to exclude all URLs of
your app, except a specific view, you can use the decorator
@minified_response
(check the next section above).
Keeping comments
The default behaviour of the middleware is to remove all HTML comments. If you
want to keep the comments, set the setting KEEP_COMMENTS_ON_MINIFYING
to True
:
KEEP_COMMENTS_ON_MINIFYING = True
Using the decorator
django-htmlmin also provides a decorator, that you can use only on views you want to minify the response:
from htmlmin.decorators import minified_response
@minified_response
def home(request):
return render_to_response('home.html')
Decorator to avoid response to be minified
You can use the not_minified_response
decorator on views if you want to
avoid the minification of any specific response, without using the
EXCLUDE_FROM_MINIFYING
setting:
from htmlmin.decorators import not_minified_response
@not_minified_response
def home(request):
return render_to_response('home.html')
html_minify
function
Using the If you are not working with Django, you can invoke the html_minify
function
manually:
from htmlmin.minify import html_minify
html = '<html> <body>Hello world</body> </html>'
minified_html = html_minify(html)
Here is an example with a Flask view:
from flask import Flask
from htmlmin.minify import html_minify
app = Flask(__name__)
@app.route('/')
def home():
rendered_html = render_template('home.html')
return html_minify(rendered_html)
Keeping comments
By default, html_minify()
removes all comments. If you want to keep them,
you can pass ignore_comments=False
:
from htmlmin.minify import html_minify
html = '<html> <body>Hello world<!-- comment to keep --></body> </html>'
minified_html = html_minify(html, ignore_comments=False)
Using command line tool
If you are not even using Python, you can use the pyminify
command line
tool to minify HTML files:
$ pyminify index.html > index_minified.html
You can also keep the comments, if you want:
$ pyminify --keep-comments index.html > index_minified_with_comments.html
development
- Source hosted at GitHub
- Report issues on GitHub Issues
Pull requests are very welcome! Make sure your patches are well tested.
Running tests
If you are using a virtualenv, all you need to do is:
$ make test
community
IRC channel
#cobrateam
channel on irc.freenode.net
Changelog
You can see the complete changelog on the Github releases page.
LICENSE
Unless otherwise noted, the django-htmlmin
source files are distributed
under the BSD-style license found in the LICENSE file.