Added support for the infrastructure for on demand access/create the

server connection.

The BaseDriver and BaseConnection are two abstract classes, which allows
us to replace the existing driver with the currently used. The current
implementation supports to connect the PostgreSQL and Postgres Plus
Advanced Server using the psycopg2 driver.

web/pgadmin/misc/__init__.py

@@ -8,9 +8,13 @@
 ##########################################################################
 
 """A blueprint module providing utility functions for the application."""
-MODULE_NAME = 'misc'
 
+import datetime
+from flask import session, current_app
 from pgadmin.utils import PgAdminModule
+import pgadmin.utils.driver as driver
+
+MODULE_NAME = 'misc'
 
 # Initialise the module
 blueprint = PgAdminModule(MODULE_NAME, __name__,
@@ -19,7 +23,11 @@ blueprint = PgAdminModule(MODULE_NAME, __name__,
 ##########################################################################
 # A special URL used to "ping" the server
 ##########################################################################
-@blueprint.route("/ping")
+
+
+@blueprint.route("/ping", methods=('get', 'post'))
 def ping():
     """Generate a "PING" response to indicate that the server is alive."""
+    driver.ping()
+
     return "PING"