[Django]-Django – nginx+fastcgi –> Unhandled Exception (after upgrade from Django 1.2.4 to Django 1.3)

To fix it I added this class (that practically doesn’t do anything) in the : /usr/local/lib/python2.6/dist-packages/django/middleware/http.py

class SetRemoteAddrFromForwardedFor(object):
    """
    This middleware has been removed; see the Django 1.1 release notes for
    details.

    It previously set REMOTE_ADDR based on HTTP_X_FORWARDED_FOR. However, after
    investiagtion, it turns out this is impossible to do in a general manner:
    different proxies treat the X-Forwarded-For header differently. Thus, a
    built-in middleware can lead to application-level security problems, and so
    this was removed in Django 1.1

    """
    def __init__(self):
        import warnings
        warnings.warn("SetRemoteAddrFromForwardedFor has been removed. "
                      "See the Django 1.1 release notes for details.",
                      category=DeprecationWarning)
        raise MiddlewareNotUsed()