Check if web address can be reached

Chad Armstrong <[email protected]> Sun, 28 Feb 2010 14:31:28 -0600

Newsgroups	gmane.comp.macosx.devel
Message-ID	<[email protected]>

Hello:

What is an efficient method to check if a web address is valid and can  
be reached?  I want to take an NSURL (www.example.com/foo.txt) and  
check if I can reach it.  I don't need to download the data just yet,  
since the data could be arbitrarily large.  Is there a way to make a  
call and receive a confirmation, such as a "200" message?

- Chad