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How to check if a domain is live even if PING is blocked?

I have been using PING to check if a domain is live, however, some domains, depsite being available on port 80, are blocking PING.

       $response=shell_exec("ping $site -n -c 1 -w 2 -W 2");

I want a fast way of testing port 80, if it is live or not.  This must be an automated solution as it needs to be part of a script.
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vincevincevince
Asked:
vincevincevince
1 Solution
 
philipp999Commented:
Hi,

would this work? (needs netcat installed):
printf "GET / HTTP/1.0\n\n" | nc -w $timout $host $port | perl -pe 'if(m|^HTTP/1\.1 200 OK|) { print "OK\n"; } else { print "NOPE\n";} exit(1);'

best,

philipp
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blklineCommented:
Perhaps something like:

wget -q -O /dev/null URL && echo "success"

or

wget -q -O /dev/null URL || echo "failure"

might fit the bill?  

URL can be ftp://  or http:// styles.

wget has quite a number of options from which to choose for timeouts and retries and such.

Barry
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vincevincevinceAuthor Commented:
Barry, that is just perfect, thanks :-)

You really deserve the points, I wish I had more to give
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