Parsing hostname and port from string or url

Question

I can be given a string in any of these formats:

• url: e.g http://www.acme.com:456

• string: e.g www.acme.com:456, www.acme.com 456, or www.acme.com

I would like to extract the host and if present a port. If the port value is not present I would like it to default to 80.

I have tried urlparse, which works fine for the url, but not for the other format. When I use urlparse on hostname: port, for example, it puts the hostname in the scheme rather than netloc.

I would be happy with a solution that uses urlparse and a regex, or a single regex that could handle both formats.

Answer 1

By using regex, you can do something like this:

p = '(?:http.*://)?(?P<host>[^:/ ]+).?(?P<port>[0-9]*).*'

m = re.search(p,'http://www.abc.com:123/test')

m.group('host') # 'www.abc.com'

m.group('port') # '123'

Or, without port:

m = re.search(p,'http://www.abc.com/test')

m.group('host') # 'www.abc.com'

m.group('port') # '' i.e. you'll have to treat this as '80'