http.HttpRequest.get_host()

Note

The get_host() method fails when the host is behind multiple proxies. One solution is to use middleware to rewrite the proxy headers, as in the following example:

from django.utils.deprecation import MiddlewareMixin

class MultipleProxyMiddleware(MiddlewareMixin):
    FORWARDED_FOR_FIELDS = [
        'HTTP_X_FORWARDED_FOR',
        'HTTP_X_FORWARDED_HOST',
        'HTTP_X_FORWARDED_SERVER',
    ]

    def process_request(self, request):
        """
        Rewrites the proxy headers so that only the most
        recent proxy is used.
        """
        for field in self.FORWARDED_FOR_FIELDS:
            if field in request.META:
                if ',' in request.META[field]:
                    parts = request.META[field].split(',')
                    request.META[field] = parts[-1].strip()

This middleware should be positioned before any other middleware that relies on the value of get_host() – for instance, CommonMiddleware or CsrfViewMiddleware.