Using javascript to get sub domain from url

Question

I have a standard URL e.g.

http://www.test.com/test1/test2.html

I am using javascript in riak for map reduce and would like to only extract www.test.com. So...the domain and the subdomain.

What is the most efficient method to do this in js since I will have millions of records?

Thanks

Tricky, you almost need a database of known domain name extensions because, what happens if you have a url like... example.co.uk? ... A list like this: mxr.mozilla.org/mozilla-central/source/netwerk/dns/… — Tim Joyce
– Tim Joyce, Commented Dec 9, 2012 at 10:25
Well...in python I did this. remove http:// and split by /. This the domain was the first element. Just need something in JS. — Tampa
– Tampa, Commented Dec 9, 2012 at 11:28

Community · Accepted Answer · 2017-05-23 10:26:52Z

5

var matches = url.match(/^https?\:\/\/([^\/?#]+)(?:[\/?#]|$)/i);
var domain = matches && matches[1];  // domain will be null if no match is found

Sophisticated domain matching is kinda tricky, but all this is covered quite well in the linked post.

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answered Dec 9, 2012 at 10:26

David Müller

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Comments

palaѕн · Accepted Answer · 2012-12-09 10:40:40Z

0

Try this:

var url = "http://www.test.com/test1/test2.html";
var domain = url.match(/:\/\/(.[^/]+)/)[1]

answered Dec 9, 2012 at 10:40

palaѕн

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