Django 2.0 HTML Prettify Middleware

middleware.py

from html5print import HTMLBeautifier

class PrettifyMiddleware:
    """Prettify HTML for anyone interested in reading the source of this site."""
    def __init__(self, get_response):
        self.get_response = get_response

    def __call__(self, request):
        response = self.get_response(request)
        if response['Content-Type'].split(';')[0] == 'text/html':
            response.content = HTMLBeautifier.beautify(response.content, 2)
        return response