A way, with URI (this is not complete, fragments and queries must be dealt with too; read the docs to see how and write some tests to be sure it's behaving as you expect). 

perl -MURI -le '$u = URI->new(shift); $u->path(undef); print $u' http:
+//www.abc.com/def/ghi.html
http://www.abc.com

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In reply to Re: modify a URL by Your Mother
in thread modify a URL by Anonymous Monk

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