1. Dongwhan Kim Annie Zhao Steven Lawrance
IE URL Lock
Dongwhan Kim
Annie Zhao
Steven Lawrance

2. Goals Restrict Internet access to filter out unwanted web sites
Sites that are not work-related
Sites that parents disapprove of for their children
Allow information technology administrators and parents to easily configure the filter’s rules

3. Strategy
Extend the Internet Explorer (IE) URL Lock browser helper object
Increase IE URL Lock’s configurability with a new configuration user interface
No knowledge of regular expressions required
Rule editing
Per-user configurations without ActiveDirectory
Expand browser coverage to include Firefox
Optionally permit all web sites while blocking only those that match a block list

4. Runtime Architectural View
Configuration User
Interface
Locking Engine
Configuration Model
Windows Registry
System
Registry
User
Registries IE
Firefox
Bookmarks
Histories
Component
Connector

5. Features Total 9 features Total estimated 4600 LOC
6 medium, 1 huge, 1 large and 1 small
Total estimated 4600 LOC

6. Features Easy interface for home users XUL for interface
JavaScript for controller code
Updates the UI when setting changes
Populates UI lists
Username
History
Bookmark
Prevent editing if user is not admin
LOC: 1530

7. Features – User Interface

8. Features 2. Configuration reader and writer
Reads and writes the configuration from and to the registry
Both system-wide and per-user
LOC 360

9. Features Configuration native library
User registry loader and unloader that uses the Win32 API
Data source of user IDs, names and their registry files
IE history, which is loaded via a COM API
Interface to native Perl-compatible regular expression library
Lock registry keys on non-admin users
LOC: 500

10. Features 4. Bookmarks and history data sources Javascript
Bookmarks data source for IE / Firefox from all users
History data source for Firefox
LOC: 410

11. Features Core engine for IE URL Lock C++
Add “enable all web browsing by default” mode
Add the ability to optionally show a dialog box when blocked instead of a web page
LOC: 60

12. Features 6. User interface integration for IE URL Lock C++
Add a right-click menu to disabled links that can open the configuration window with the clicked-on link in the “Add Location” input box
Change appearance of disabled links
Add a menu item to Tools that launches configuration editor
LOC: 370

13. Features Core engine for the Firefox version Javascript
Reads in its configuration from the registry and makes blocking decisions using the Perl-compatible regular expression library (PCRE)
LOC: 400

14. Features User interface integration for the Firefox version Javascript
Add a right-click menu to disabled links that can open the configuration window with the clicked-on link in the “Add Location” input box
Change the appearance of disabled links
Launch the configuration window using either a menu item in Tools or the Options button in the Extensions window
LOC: 340

15. Features Expert user interface XUL: The interface for expert tab
Javascript: Controller code for the interface
LOC: 630

16. Questions ?