Something

from cursesite.functions.functions import render_template
from django.http import HttpResponse
def check_browser(agent):
	browsers = (('Firefox', 1.5), ('Opera', 9), ('MSIE', 7), ('Safari', 85),)
	for b in browsers:
		loc = agent.find(b[0])
		if loc != -1:
			start = loc+len(b[0])+1
			end = agent.find(' ', start)
			if end != -1:
				version = agent[start:end]
			else:
				version = agent[start:]
			if version[-1] == ';':
				version = version[0:-1]
			version = version.split('.')
			version = "%s.%s" % (version[0], ''.join(version[1:]).split(',')[0])
			if float(version) < float(b[1]):
				valid = False
			else:
				valid = True
			ec = {'browser_version': version, 'browser': b[0], 'valid': valid}
			return ec

	return {'browser': agent, 'browser_version': '', 'valid': True}

class ValidateBrowser(object):
	def process_response(self, request, response):
		#return response
		if 'cgbcheck' in request.COOKIES or request.META['HTTP_USER_AGENT'] == 'Python-urllib/1.16' or request.GET.get('skipcheck', False) or request.META['HTTP_USER_AGENT'].find('Googlebot') != -1:
			return response
		response.set_cookie('cgbcheck', 1, None, None, '/', '.cursebeta.com')
		agent = request.META['HTTP_USER_AGENT']
		ec = check_browser(agent)
		if 'REQUEST_URI' in request.META:
			url = request.META['REQUEST_URI']
		else:
			url = '/'
		ec.update({'url': url})
		if ec:
			return render_template(request, 'browsercheck.html', ec)