--- a/frontends/src/bridge/DBus.py	Thu Oct 16 20:10:08 2014 +0200
+++ b/frontends/src/bridge/DBus.py	Thu Oct 16 20:18:40 2014 +0200
@@ -126,16 +126,20 @@
         return self.db_core_iface.addContact(entity_jid, profile_key)
 
     def asyncConnect(self, profile_key="@DEFAULT@", password='', callback=None, errback=None):
-        return self.db_core_iface.asyncConnect(profile_key, password, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.asyncConnect(profile_key, password, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def asyncCreateProfile(self, profile, password='', callback=None, errback=None):
-        return self.db_core_iface.asyncCreateProfile(profile, password, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.asyncCreateProfile(profile, password, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def asyncDeleteProfile(self, profile, callback=None, errback=None):
-        return self.db_core_iface.asyncDeleteProfile(profile, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.asyncDeleteProfile(profile, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def asyncGetParamA(self, name, category, attribute="value", security_limit=-1, profile_key="@DEFAULT@", callback=None, errback=None):
-        return unicode(self.db_core_iface.asyncGetParamA(name, category, attribute, security_limit, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err))))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return unicode(self.db_core_iface.asyncGetParamA(name, category, attribute, security_limit, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler))
 
     def confirmationAnswer(self, id, accepted, data, profile):
         return self.db_core_iface.confirmationAnswer(id, accepted, data, profile)
@@ -144,10 +148,12 @@
         return self.db_core_iface.delContact(entity_jid, profile_key)
 
     def discoInfos(self, entity_jid, profile_key, callback=None, errback=None):
-        return self.db_core_iface.discoInfos(entity_jid, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.discoInfos(entity_jid, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def discoItems(self, entity_jid, profile_key, callback=None, errback=None):
-        return self.db_core_iface.discoItems(entity_jid, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.discoItems(entity_jid, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def disconnect(self, profile_key="@DEFAULT@"):
         return self.db_core_iface.disconnect(profile_key)
@@ -165,7 +171,8 @@
         return self.db_core_iface.getEntityData(jid, keys, profile)
 
     def getHistory(self, from_jid, to_jid, limit, between=True, search='', profile="@NONE@", callback=None, errback=None):
-        return self.db_core_iface.getHistory(from_jid, to_jid, limit, between, search, profile, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.getHistory(from_jid, to_jid, limit, between, search, profile, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def getLastResource(self, contact_jid, profile_key="@DEFAULT@"):
         return unicode(self.db_core_iface.getLastResource(contact_jid, profile_key))
@@ -180,16 +187,19 @@
         return unicode(self.db_core_iface.getParamA(name, category, attribute, profile_key))
 
     def getParams(self, security_limit=-1, app='', profile_key="@DEFAULT@", callback=None, errback=None):
-        return unicode(self.db_core_iface.getParams(security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err))))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return unicode(self.db_core_iface.getParams(security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler))
 
     def getParamsCategories(self, ):
         return self.db_core_iface.getParamsCategories()
 
     def getParamsForCategory(self, category, security_limit=-1, app='', profile_key="@DEFAULT@", callback=None, errback=None):
-        return unicode(self.db_core_iface.getParamsForCategory(category, security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err))))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return unicode(self.db_core_iface.getParamsForCategory(category, security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler))
 
     def getParamsUI(self, security_limit=-1, app='', profile_key="@DEFAULT@", callback=None, errback=None):
-        return unicode(self.db_core_iface.getParamsUI(security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err))))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return unicode(self.db_core_iface.getParamsUI(security_limit, app, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler))
 
     def getPresenceStatuses(self, profile_key="@DEFAULT@"):
         return self.db_core_iface.getPresenceStatuses(profile_key)
@@ -204,7 +214,8 @@
         return self.db_core_iface.getProgress(id, profile)
 
     def getReady(self, callback=None, errback=None):
-        return self.db_core_iface.getReady(timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.getReady(timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def getVersion(self, ):
         return unicode(self.db_core_iface.getVersion())
@@ -219,7 +230,8 @@
         return self.db_core_iface.isConnected(profile_key)
 
     def launchAction(self, callback_id, data, profile_key="@DEFAULT@", callback=None, errback=None):
-        return self.db_core_iface.launchAction(callback_id, data, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.launchAction(callback_id, data, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def loadParamsTemplate(self, filename):
         return self.db_core_iface.loadParamsTemplate(filename)
@@ -231,7 +243,8 @@
         return self.db_core_iface.saveParamsTemplate(filename)
 
     def sendMessage(self, to_jid, message, subject='', mess_type="auto", extra={}, profile_key="@NONE@", callback=None, errback=None):
-        return self.db_core_iface.sendMessage(to_jid, message, subject, mess_type, extra, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=lambda err:errback(dbus_to_bridge_exception(err)))
+        error_handler = None if callback is None else lambda err:errback(dbus_to_bridge_exception(err))
+        return self.db_core_iface.sendMessage(to_jid, message, subject, mess_type, extra, profile_key, timeout=const_TIMEOUT, reply_handler=callback, error_handler=error_handler)
 
     def setParam(self, name, value, category, security_limit=-1, profile_key="@DEFAULT@"):
         return self.db_core_iface.setParam(name, value, category, security_limit, profile_key)