webui: Move "password" option definition to "login.py"

NOTE:
By using the "tornado.options", each module can defines its own
options, which are added to the global namespace.
And the defined options can also be used by other modules.

1 files changed, 9 insertions, 1 deletions

diff --git a/fg21sim/webui/handlers/login.py b/fg21sim/webui/handlers/login.py
index 4529005..5a9987a 100644
--- a/fg21sim/webui/handlers/login.py
+++ b/fg21sim/webui/handlers/login.py
@@ -3,14 +3,22 @@
 
 """
 Login handler
+
+Currently, the login is simply authenticated by a plain password.
 """
 
-from tornado.options import options
+from tornado.options import define, options
 from tornado.escape import xhtml_escape
 
 from .base import BaseRequestHandler
 
 
+# Each module defines its own options, which are added to the global namespace
+define("password", type=str,
+       help=("Password authentication to access the Web UI. "
+             "If not specified, then all accesses are allowed."))
+
+
 class LoginHandler(BaseRequestHandler):
     """
     Login page handler of the Web UI.