John, Thanks for your help. Your solution is absolutely fine and it worked for me.
Raghu ----- Original Message ----- From: "WWW" <[EMAIL PROTECTED]> To: "Raghu Karamel" <[EMAIL PROTECTED]> Cc: <[EMAIL PROTECTED]> Sent: Wednesday, October 30, 2002 3:20 PM Subject: Re: How to verify that Web Server is up and running befor sending HTTP request to it > There are two ways to do this. > > (1.) Telnet to the host on port 80. (Net::Telnet) If connection is > refused, then there is no HTTP server running or DOWN, else HTTP server is running > or > UP. > > (2.) Perform a HTTP request to the server NOT for specific content but for > Server Side Status info. I dont believe there is a specific method in LWP > that returns a YES or NO answer on whether or not the server is running. > But there are methods in LWP for getting server header information on a > HEAD request for "http://hostname";. > > You can do this in LWP with the following code. It will return the > following data if the server is UP: > > _protocol: HTTP/1.1 > _content: > _headers: HTTP::Headers=HASH(0x828a9b0) > _rc: 200 > _msg: OK > > And if the server is DOWN, it will return: > > _request: HTTP::Request=HASH(0x816c078) > _content: > _headers: HTTP::Headers=HASH(0x826db30) > _rc: 500 > _msg: Can't connect to 64.75.173.18:80 (Socket is not connected) > > Here is the Code: > > > #!/usr/bin/perl > > use LWP::UserAgent; > > my $ua = LWP::UserAgent->new(env_proxy => 1, > keep_alive => 1, > timeout => 30, > ); > > $request = HTTP::Request->new('HEAD', 'http://www.essenz.com/'); > $r = $ua->request($request); > %b = %{$r}; > > foreach $key (keys(%b)) > { > print "$key: $b{$key}\n"; > } > > > Let me know if this helps. > > > John Von Essen > > > > On Wed, 30 Oct 2002, Raghu Karamel wrote: > > > Hi > > > > I have a stupid question. Hope that it won't be so hard to answer. > > > > I would like to verify the state of the web server (UP or DOWN) before I make an HTTP request to the web sever. Is there a method available in LWP that allows me to do this? Or what is the best way to do this? > > > > I asked this question few minutes back, But I wasn't sure whether I posted it or not. Please ignore this email if you got the previous one. > > > > Thanks, Raghu > > >
