allow fully read-only mode if no password is set

IPython/frontend/html/notebook/handlers.py

@@ -77,7 +77,7 b' class AuthenticatedHandler(web.RequestHandler):'
         if user_id is None:
             # prevent extra Invalid cookie sig warnings:
             self.clear_cookie('username')
-            if not self.application.password:
+            if not self.application.password and not self.application.ipython_app.read_only:
                 user_id = 'anonymous'
         return user_id
 

IPython/frontend/html/notebook/notebookapp.py

@@ -125,8 +125,7 b" flags['read-only'] = ("
     individual notebooks, but not edit them, start kernels, or run
     code.
     
-    This flag only makes sense in conjunction with setting a password,
-    via the ``NotebookApp.password`` configurable.
+    If no password is set, the server will be entirely read-only.
     """
 )