Close the connection on logout and avoid trying to use the same connection on the next login :p

see #139

extensions/sievefilters/lib.py

@@ -31,14 +31,19 @@ class SieveClient(object):
         except Error, e:
             return False, _("Connection to MANAGESIEVE server failed, check your configuration")
         return True, None
+
+    def logout(self):
+        self.msc.logout()
+        self.msc = None
         
     def refresh(self, user, password):
-        try:
-            self.msc.capability()
-        except Error, e:
-            pass
-        else:
-            return
+        if self.msc is not None:
+            try:
+                self.msc.capability()
+            except Error, e:
+                pass
+            else:
+                return
         try:
             ret, msg = self.login(user, password)
         except Error, e:

extensions/sievefilters/main.py

@@ -7,6 +7,7 @@ from sievelib.managesieve import SUPPORTED_AUTH_MECHS
 
 def init():
     events.register("UserMenuDisplay", menu)
+    events.register("UserLogout", userlogout)
 
     parameters.register_admin("SERVER", type="string", 
                               deflt="127.0.0.1",
@@ -55,3 +56,16 @@ def menu(**kwargs):
          "url" : reverse(views.index),
          "img" : static_url("pics/filters.png")}
         ]
+
+def userlogout(**kwargs):
+    from lib import SieveClient
+
+    if kwargs["request"].user.id == 1:
+        return
+    try:
+        sc = SieveClient(user=kwargs["request"].user.username,
+                         password=kwargs["request"].session["password"])
+    except Exception, e:
+        pass
+    else:
+        sc.logout()