Fix Ajax wrapper

[troeger]

File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py", line 114, in get_response response = wrapped_callback(request, callback_args, callback_kwargs) File "/usr/local/lib/python2.7/dist-packages/django/contrib/auth/decorators.py", line 22, in _wrapped_view return view_func(request, args, kwargs) File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/csrf.py", line 57, in wrapped_view return view_func(args, kwargs) File "/var/www/fuzztrees.net/www/FuzzEd/decorators.py", line 19, in wrap return request_handler(request, args, kwargs) File "/usr/local/lib/python2.7/dist-packages/django/views/decorators/cache.py", line 53, in _wrapped_view_func add_never_cache_headers(response) File "/usr/local/lib/python2.7/dist-packages/django/utils/cache.py", line 131, in add_never_cache_headers patch_response_headers(response, cache_timeout=-1) File "/usr/local/lib/python2.7/dist-packages/django/utils/cache.py", line 121, in patch_response_headers if not response.has_header('Last-Modified'): AttributeError: 'NoneType' object has no attribute 'has_header' <WSGIRequest path:/front/graphs/540/nodegroups/4, GET:<QueryDict: {}>, POST:<QueryDict: {u'properties': [u'{"name":"asdd"}']}>, COOKIES:{'csrftoken': '5uGOgxzy05eiwfx3HaoluooUATPiSeH7', 'openid_provider': 'google', 'sessionid': 'khfx8vb2bgp4y10o4imooy8do1jcw1wk'}, META:{'CONTENT_LENGTH': '40', 'CONTENT_TYPE': 'application/x-www-form-urlencoded; charset=UTF-8', u'CSRF_COOKIE': u'5uGOgxzy05eiwfx3HaoluooUATPiSeH7', 'DOCUMENT_ROOT': '/var/www/fuzztrees.net/www/FuzzEd/', 'GATEWAY_INTERFACE': 'CGI/1.1', 'HTTPS': '1', 'HTTP_ACCEPT': 'application/json, text/javascript, /; q=0.01', 'HTTP_ACCEPT_ENCODING': 'gzip,deflate,sdch', 'HTTP_ACCEPT_LANGUAGE': 'de-DE,de;q=0.8,en-US;q=0.6,en;q=0.4', 'HTTP_CONNECTION': 'keep-alive', 'HTTP_COOKIE': 'openid_provider=google; sessionid=khfx8vb2bgp4y10o4imooy8do1jcw1wk; csrftoken=5uGOgxzy05eiwfx3HaoluooUATPiSeH7', 'HTTP_HOST': 'fuzzed.org', 'HTTP_ORIGIN': 'https://fuzzed.org', 'HTTP_REFERER': 'https://fuzzed.org/editor/540', 'HTTP_USER_AGENT': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.152 Safari/537.36', 'HTTP_X_REQUESTED_WITH': 'XMLHttpRequest', 'PATH_INFO': u'/front/graphs/540/nodegroups/4', 'PATH_TRANSLATED': '/var/www/fuzztrees.net/www/FuzzEd/wsgi.py/front/graphs/540/nodegroups/4', 'QUERY_STRING': '', 'REMOTE_ADDR': '92.78.139.93', 'REMOTE_PORT': '60857', 'REQUEST_METHOD': 'POST', 'REQUEST_URI': '/front/graphs/540/nodegroups/4', 'SCRIPT_FILENAME': '/var/www/fuzztrees.net/www/FuzzEd/wsgi.py', 'SCRIPT_NAME': u'', 'SERVER_ADDR': '37.200.99.207', 'SERVER_ADMIN': 'webmaster@fuzzed.org', 'SERVER_NAME': 'fuzzed.org', 'SERVER_PORT': '443', 'SERVER_PROTOCOL': 'HTTP/1.1', 'SERVER_SIGNATURE': '

Apache/2.2.22 (Ubuntu) Server at fuzzed.org Port 443

\n', 'SERVER_SOFTWARE': 'Apache/2.2.22 (Ubuntu)', 'SSL_TLS_SNI': 'fuzzed.org', 'mod_wsgi.application_group': 'fuzzed.org|', 'mod_wsgi.callable_object': 'application', 'mod_wsgi.handler_script': '', 'mod_wsgi.input_chunked': '0', 'mod_wsgi.listener_host': '', 'mod_wsgi.listener_port': '443', 'mod_wsgi.process_group': 'ssl.fuzztrees.net', 'mod_wsgi.request_handler': 'wsgi-script', 'mod_wsgi.script_reloading': '1', 'mod_wsgi.version': (3, 3), 'wsgi.errors': <mod_wsgi.Log object at 0xaf912cc8>, 'wsgi.file_wrapper': <built-in method file_wrapper of mod_wsgi.Adapter object at 0xaf87ee78>, 'wsgi.input': <mod_wsgi.Input object at 0xaf912c78>, 'wsgi.multiprocess': True, 'wsgi.multithread': False, 'wsgi.run_once': False, 'wsgi.url_scheme': 'https', 'wsgi.version': (1, 1)}>