Can we use sikuli for automation of http pop up?
If you are accessing direct URL that has htaccess/http popup then you can go with http://username:password@www.yoursiteurl pattern. It will bypass the login popup. This way execution will be faster than Sikuli implementation. Also you will have to add Sikuli execution files, Jars etc in your project folder.
Also you can use AutiIt to handle htaccess popup but it will work with Windows environment only. Sikuli will work with Win/Linux/Mac all. But you will have to capture different images for different OS/Browser combination. i.e. Code you have written for Win Chrome may not work with Mac Chrome.