do not crash if recipient of a message is gone

miguelgrinberg · May 13, 2016 · 95c9a55 · 95c9a55
1 parent 12532c0
commit 95c9a55
Showing 1 changed file with 7 additions and 2 deletions.
diff --git a/engineio/server.py b/engineio/server.py
@@ -154,8 +154,13 @@ def send(self, sid, data, binary=None):
                        (Python 3) are sent as text, and str (Python 2) and
                        bytes (Python 3) are sent as binary.
         """
-        self._get_socket(sid).send(packet.Packet(packet.MESSAGE, data=data,
-                                                 binary=binary))
+        try:
+            socket = self._get_socket(sid)
+        except KeyError:
+            # the socket is not available
+            self.logger.warning('Cannot send to sid %s', sid)
+            return
+        socket.send(packet.Packet(packet.MESSAGE, data=data, binary=binary))
 
     def disconnect(self, sid=None):
         """Disconnect a client.