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https://github.com/cobrateam/django-htmlmin

HTML minifier for Python frameworks (not only Django, despite the name).
https://github.com/cobrateam/django-htmlmin

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HTML minifier for Python frameworks (not only Django, despite the name).

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README 

        
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django-htmlmin

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.. image:: https://github.com/cobrateam/django-htmlmin/workflows/Build/badge.svg

   :target: https://github.com/cobrateam/django-htmlmin/actions?query=branch:master+workflow:Build



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: :



.. code-block:: sh



    $ [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:



.. code-block:: python



    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``:



.. code-block:: python



    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:



.. code-block:: python



    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:



.. code-block:: python



    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``:



.. code-block:: python



    KEEP_COMMENTS_ON_MINIFYING = True



Conservative whitespace minifying

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



By default the minifier will try to intelligently remove whitespace and leave

spaces only as needed for inline text rendering.  Sometimes it may be necessary

to not completely remove whitespace but only reduce spaces to a single space.

If you set ``CONSERVATIVE_WHITESPACE_ON_MINIFYING`` to ``False`` then

whitespace is always reduced to a single space and never completely removed.



.. code-block:: python



    CONSERVATIVE_WHITESPACE_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:



.. code-block:: python



    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:



.. code-block:: python



    from htmlmin.decorators import not_minified_response



    @not_minified_response

    def home(request):

        return render_to_response('home.html')



Using the ``html_minify`` function

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



If you are not working with Django, you can invoke the ``html_minify`` function

manually:



.. code-block:: python



    from htmlmin.minify import html_minify

    html = '    Hello world    '

    minified_html = html_minify(html)



Here is an example with a `Flask `_ view:



.. code-block:: python



    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``:



.. code-block:: python



    from htmlmin.minify import html_minify

    html = '  Hello world  '

    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:



.. code-block:: sh



    $ pyminify index.html > index_minified.html



You can also keep the comments, if you want:



.. code-block:: sh



    $ 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:



.. code-block:: sh



    $ 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.