X-Git-Url: https://git.mdrn.pl/django-cas-provider.git/blobdiff_plain/cf9232feac798bf91d7a61e308dfa9955d6fe383..73bfc6b53448f5f1d10d9b3f58f2cf4f3756be41:/cas_provider/views.py

diff --git a/cas_provider/views.py b/cas_provider/views.py
index 9c820ce..32ed6e9 100644
--- a/cas_provider/views.py
+++ b/cas_provider/views.py
@@ -1,70 +1,125 @@
-from django.http import HttpResponse, HttpResponseForbidden, HttpResponseRedirect
+from django.conf import settings
+from django.contrib.auth import login as auth_login, \
+    logout as auth_logout
+from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render_to_response
 from django.template import RequestContext
-from django.contrib.auth.models import User
-from django.contrib.auth import authenticate
-from django.contrib.auth import login as auth_login, logout as auth_logout
-
 from forms import LoginForm
 from models import ServiceTicket, LoginTicket
-from utils import create_service_ticket
 
-__all__ = ['login', 'validate', 'logout']
 
-def login(request, template_name='cas/login.html', success_redirect='/accounts/'):
+__all__ = ['login', 'validate', 'logout', 'service_validate']
+
+
+INVALID_TICKET = 'INVALID_TICKET'
+INVALID_SERVICE = 'INVALID_SERVICE'
+INVALID_REQUEST = 'INVALID_REQUEST'
+INTERNAL_ERROR = 'INTERNAL_ERROR'
+
+ERROR_MESSAGES = (
+    (INVALID_TICKET, u'The provided ticket is invalid.'),
+    (INVALID_SERVICE, u'Service is invalid'),
+    (INVALID_REQUEST, u'Not all required parameters were sent.'),
+    (INTERNAL_ERROR, u'An internal error occurred during ticket validation'),
+)
+
+
+def login(request, template_name='cas/login.html', \
+                success_redirect=settings.LOGIN_REDIRECT_URL,
+                warn_template_name='cas/warn.html'):
     service = request.GET.get('service', None)
     if request.user.is_authenticated():
         if service is not None:
-            ticket = create_service_ticket(request.user, service)
-            if service.find('?') == -1:
-                return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
-            else:
-                return HttpResponseRedirect(service + '&ticket=' + ticket.ticket)
+            if request.GET.get('warn', False):
+                return render_to_response(warn_template_name, {
+                    'service': service,
+                    'warn': False
+                }, context_instance=RequestContext(request))
+            ticket = ServiceTicket.objects.create(service=service, user=request.user)
+            return HttpResponseRedirect(ticket.get_redirect_url())
         else:
             return HttpResponseRedirect(success_redirect)
-    errors = []
     if request.method == 'POST':
-        username = request.POST.get('username', None)
-        password = request.POST.get('password', None)
-        service = request.POST.get('service', None)
-        lt = request.POST.get('lt', None)
-        
-        try:
-            login_ticket = LoginTicket.objects.get(ticket=lt)
-        except:
-            errors.append('Login ticket expired. Please try again.')
-        else:
-            login_ticket.delete()
-            user = authenticate(username=username, password=password)
-            if user is not None:
-                if user.is_active:
-                    auth_login(request, user)
-                    if service is not None:
-                        ticket = create_service_ticket(user, service)
-                        return HttpResponseRedirect(service + '?ticket=' + ticket.ticket)
-                    else:
-                        return HttpResponseRedirect(success_redirect)
-                else:
-                    errors.append('This account is disabled.')
-            else:
-                    errors.append('Incorrect username and/or password.')
-    form = LoginForm(service)
-    return render_to_response(template_name, {'form': form, 'errors': errors}, context_instance=RequestContext(request))
-    
+        form = LoginForm(request.POST)
+        if form.is_valid():
+            user = form.get_user()
+            auth_login(request, user)
+            service = form.cleaned_data.get('service')
+            if service is not None:
+                ticket = ServiceTicket.objects.create(service=service, user=user)
+                success_redirect = ticket.get_redirect_url()
+            return HttpResponseRedirect(success_redirect)
+    else:
+        form = LoginForm(initial={
+            'service': service,
+            'lt': LoginTicket.objects.create()
+        })
+    return render_to_response(template_name, {
+        'form': form,
+        'errors': form.get_errors()
+    }, context_instance=RequestContext(request))
+
+
 def validate(request):
+    """Validate ticket via CAS v.1 protocol"""
     service = request.GET.get('service', None)
     ticket_string = request.GET.get('ticket', None)
     if service is not None and ticket_string is not None:
+        #renew = request.GET.get('renew', True)
+        #if not renew:
+        # TODO: check user SSO session
         try:
             ticket = ServiceTicket.objects.get(ticket=ticket_string)
             username = ticket.user.username
             ticket.delete()
-            return HttpResponse("yes\r\n%s\r\n" % username)
+            return HttpResponse("yes\n%s\n" % username)
         except:
             pass
-    return HttpResponse("no\r\n\r\n")
-    
+    return HttpResponse("no\n\n")
+
+
 def logout(request, template_name='cas/logout.html'):
     url = request.GET.get('url', None)
     auth_logout(request)
-    return render_to_response(template_name, {'url': url}, context_instance=RequestContext(request))
+    return render_to_response(template_name, {'url': url}, \
+                              context_instance=RequestContext(request))
+
+
+def service_validate(request):
+    """Validate ticket via CAS v.2 protocol"""
+    service = request.GET.get('service', None)
+    ticket_string = request.GET.get('ticket', None)
+    if service is None or ticket_string is None:
+        return _cas2_error_response(INVALID_REQUEST)
+
+    try:
+        ticket = ServiceTicket.objects.get(ticket=ticket_string)
+    except ServiceTicket.DoesNotExist:
+        return _cas2_error_response(INVALID_TICKET)
+
+    if settings.CAS_CHECK_SERVICE and ticket.service != service:
+        ticket.delete()
+        return _cas2_error_response(INVALID_SERVICE)
+
+    username = ticket.user.username
+    ticket.delete()
+    return _cas2_sucess_response(username)
+
+
+def _cas2_error_response(code):
+    return HttpResponse(u''''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
+            <cas:authenticationFailure code="%(code)s">
+                %(message)s
+            </cas:authenticationFailure>
+        </cas:serviceResponse>''' % {
+            'code': code,
+            'message': dict(ERROR_MESSAGES).get(code)
+    }, mimetype='text/xml')
+
+
+def _cas2_sucess_response(username):
+    return HttpResponse(u'''<cas:serviceResponse xmlns:cas="http://www.yale.edu/tp/cas">
+        <cas:authenticationSuccess>
+            <cas:user>%(username)s</cas:user>
+        </cas:authenticationSuccess>
+    </cas:serviceResponse>''' % {'username': username}, mimetype='text/xml')