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from django import http
from django import shortcuts
from django.conf import settings
import base64
class FilterPersistMiddleware(object):
def process_request(self, request):
path = request.path
if path.find('/admin/') != -1: #Dont waste time if we are not in admin
query_string = request.META['QUERY_STRING']
if not request.META.has_key('HTTP_REFERER'):
return None
session = request.session
if session.get('redirected', False):#so that we dont loop once redirected
del session['redirected']
return None
referrer = request.META['HTTP_REFERER'].split('?')[0]
referrer = referrer[referrer.find('/admin'):len(referrer)]
key = 'key'+path.replace('/','_')
if path == referrer: #We are in same page as before
if query_string == '': #Filter is empty, delete it
if session.get(key,False):
del session[key]
return None
request.session[key] = query_string
elif '_directlink=1' in query_string: # Direct link to a filter, by ourselves, so remove it
redirect_to = path+'?'+query_string.replace('&_directlink=1','')
if session.has_key(key):
del session[key]
return http.HttpResponseRedirect(redirect_to)
else: #We are are coming from another page, restore filter if available
if session.get(key, False):
query_string=request.session.get(key)
redirect_to = path+'?'+query_string
request.session['redirected'] = True
return http.HttpResponseRedirect(redirect_to)
else:
return None
else:
return None
class GlobalLoginMiddleware(object):
def process_view(self, request, callback, callback_args, callback_kwargs):
if not settings.GLOBAL_LOGIN_USER or not settings.GLOBAL_LOGIN_PASSWORD:
# Not configured to do global auth
return None
if getattr(callback, 'global_login_exempt', False):
# No global auth on this specific url
return None
if 'HTTP_AUTHORIZATION' in request.META:
auth = request.META['HTTP_AUTHORIZATION'].split()
if len(auth) != 2:
return http.HttpResponseForbidden("Invalid authentication")
if auth[0].lower() == "basic":
user, pwd = base64.b64decode(auth[1]).split(':')
if user == settings.GLOBAL_LOGIN_USER and pwd == settings.GLOBAL_LOGIN_PASSWORD:
return None
# Else we fall through and request a login prompt
response = http.HttpResponse()
response.status_code = 401
response['WWW-Authenticate'] = 'Basic realm={0}'.format(settings.SITEBASE)
return response
# Ability to redirect using raise()
class RedirectException(Exception):
def __init__(self, url):
self.url = url
class RedirectMiddleware(object):
def process_exception(self, request, exception):
if isinstance(exception, RedirectException):
return shortcuts.redirect(exception.url)
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