Regex to get domain with different protocols

Question

I have this regex, which extracts domain name from string.

var matches = str.match(/^https?\:\/\/([^\/:?#]+)(?:[\/:?#]|$)/i);

I would like the same RegEx, including other protocols like rstp. For example:

"http://www.example.com/a/".match(/^https?\:\/\/([^\/:?#]+)(?:[\/:?#]|$)/i)

Result: ["http://www.example.com/", "www.example.com"]

I have tried this:

"http://www.example.com/a/".match(/^(http|https|rtsp)\:\/\/([^\/:?#]+)(?:[\/:?#]|$)/i)

But it returns http too: ["http://www.example.com/", "http", "www.example.com"]

I would like the same output.

Thanks.

James Thorpe · Accepted Answer · 2016-03-07 13:26:53Z

2

You just need to turn your group of protocol alternations into a non-capturing group by prefixing it with ?::

"http://www.example.com/a/".match(/^(?:http|https|rtsp)\:\/\/([^\/:?#]+)(?:[\/:?#]|$)/i)
//["http://www.example.com/", "www.example.com"]

answered Mar 7, 2016 at 13:26

James Thorpe

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