Reimplemented communication with the client side.

 * Implemented a node web server supporting asynchronous websocket and long-polling communication with clients.
 * Implemented TCP communication between python middleware and node web server.

1 files changed, 11 insertions, 0 deletions

diff --git a/server/user_session.py b/server/user_session.py
index f21102c..5eec743 100644
--- a/server/user_session.py
+++ b/server/user_session.py
@@ -8,6 +8,7 @@ import random
 from . import prolog_session
 from . import python_session
 from . import problems
+from . import handlers
 import db
 from errors.session import NoSuchSession, AuthenticationFailed
 import psycopg2.extras
@@ -128,6 +129,16 @@ class UserSession(object):
         finally:
             db.return_connection(conn)
 
+    def send(self, json_obj):
+        """Sends a message to the user.
+
+        This method may be used only for messages that are not replies to requests.
+        For replies use the reply() method on the Request object.
+        :param json_obj: a dict representing the json message
+        :return: None
+        """
+        handlers.send(None, self.sid, json_obj)
+
     def __del__(self):
         #  no locking needed if GC is removing us, as there cannot be any concurrent access by definition
         if hasattr(self, 'prolog_session') and (self.prolog_session is not None):