Chrome Frame Django Middleware

gistfile1.py

from django.conf import settings

class ChromeFrameMiddleware(object):
    """
    Adds the Google Chrome Frame meta tag to your page

    If you don't want it to check if Chrome Frame is installed,
    put this in your settings.py file.

    CHROME_CHECK = False
    """
    
    frame_tag = '<meta http-equiv="X-UA-Compatible" content="chrome=1">'
    cfinstall_tag ="""<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/chrome-frame/1.0.2/CFInstall.min.js"></script>
                      <script>CFInstall.check()</script>"""
                      
    def __init__(self):
        self.process_response = self.insert_tag
        if getattr(settings, 'CHROME_CHECK', True):
            self.process_response = self.chrome_check
        
    def chrome_check(self, request, response):
        if 'HTTP_USER_AGENT' in request.META:
            if request.META['HTTP_USER_AGENT'].find('chromeframe') == -1:
                body = response.content.lower().find('</body>')
                if body != 1:
                    response.content = response.content[:body] + self.cfinstall_tag + response.content[body:]
                return response
            return self.insert_tag(request, response)
    
    def insert_tag(self, request, response):
        # Allows you to turn off Chrome per request
        if 'no_chrome' in request.GET:
            return response
            
        # Find the head, and insert tag right before its closing tag
        head = response.content.lower().find('</head>')
        if head == -1:
            return response
            
        # Return new response
        response.content = response.content[:head] + self.frame_tag + response.content[head:]
        return response