Hello Monks, I am trying to extract a list of URLs for all subdomains of the domain "foo.com" from a very messy DB dump. Here's my code and some sample data: 

while (<DATA>) {
        my @urls = ( $_ =~ /(https?\:\/\/.*?\.foo\.com)/g);
        foreach my $url (@urls) {

        print "$url\n" if $1;
    }

}

__DATA__
http://www.foo.com/fishnuts
http://smtp.foo.com https://www.foo.com/?(bunch-of-stuff):{}https://sv
+n.foo.com/docs
https://yahoo.de/?search:{width}-https://www.foo.com
https://google.com https://foo.com:(More-random-stuff)https://yahoo.de
+::http://pubdocs.foo.com/top/index.html

[download]

The desired result would be: 

http://www.foo.com
http://smtp.foo.com
https://www.foo.com
https://svn.foo.com
https://www.foo.com
https://foo.com
http://pubdocs.foo.com

[download]
However, that regex does not work with the last two lines of data, as it also matches starting from the first "http". I tried this: 

/(https?\:\/\/(?!http.)*?\.foo\.com)/g

[download]

But get "matches null string many times in regex"

Thanks for any help!

In reply to Regex: Extract base URL for a specific domain by alpha-lemming

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