| http://example.com/foo/bar => http://example.com | |
| http://example.com/foo/bar => http://example.com | |
| https://example.com/ttt?ggg => https://example.com | |
| ftp://example.com/ttt?ggg => ftp://example.com | |
| file:///home/abarth => file:// | |
| data:text/html,<b>foo</b> => null | |