Make client asynchronous base handler only attemp to dispatch response...

Make client asynchronous base handler only attemp to dispatch response packets, and raise if it is not an expected response.
Add a method on Packet class to determine if it's a response.


git-svn-id: https://svn.erp5.org/repos/neo/branches/prototype3@808 71dcc9de-d417-0410-9af5-da40c76e7ee4

neo/client/handlers/handler.py

@@ -16,6 +16,7 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 from neo.handler import EventHandler
+from neo.protocol import UnexpectedPacketError
 
 class BaseHandler(EventHandler):
     """Base class for client-side EventHandler implementations."""
@@ -37,11 +38,13 @@ class BaseHandler(EventHandler):
 
     def packetReceived(self, conn, packet):
         """Redirect all received packet to dispatcher thread."""
+        if packet.isReponse():
             queue = self.dispatcher.getQueue(conn, packet)
             if queue is None:
-            self.dispatch(conn, packet)
-        else:
+                raise UnexpectedPacketError('Unexpected response packet')
             queue.put((conn, packet))
+        else:
+            self.dispatch(conn, packet)
 
     def _notifyQueues(self, conn):
         """

neo/protocol.py

@@ -448,6 +448,9 @@ class Packet(object):
             raise PacketMalformedError('unknown message type 0x%x' % self._type)
         return method(self._body)
 
+    def isResponse(self):
+        return self._type & 0x8000 == 0x8000
+
 # packet parser
 def parse(msg):
     # logging.debug('parsing %s', dump(msg))