Redirect when web server not responding

Bebo · 11-18-2003, 12:35 PM

Hello,

Yesterday I setup a web server on my home computer, and I'm going to host part of my home page on this server. I say part of since I already have a web page at work which I still want to use, since this has a much better URL. The problem is now that my computer at home is usually switched off when I'm not at home, which will give a lot of errors when someone tries to follow a link from my web page at work, to a page which is on my switched-off home computer.

My question is: is it possible to write something in html/xml/asp/jsp/javascript/whatever, that redirects to my home computer's web page if it is running, but displays another page if it's off? Something like

Code:

if home_server_responds then
   redirect to web page on home server
else
   display another page on the work web page

Thank a lot for any help!

/Stefan

Bebo · 11-20-2003, 05:06 AM

Anyone?

zekko · 11-20-2003, 08:59 AM

You could try pinging your server (system("ping")), and parse the respond you get. If you get something like 'unable to find the server' redirect them.

german · 11-20-2003, 10:40 AM

you could write a simple java servlet/JSP for your work computer which would wait for an HTTP request, then once it gets one tries to open that URL (with a very short timeout). If it times out or blows up then send a redirect to the work computer's page, else read the contents of the page and display them. That also has the advantage of making it look like the stuff from your home puter is on the work computer, with the nice URL.

HTH

B.

Bebo · 11-20-2003, 11:49 AM

Thanks guys for your reply! But...my knowledge about programming web pages in anything other than html and css is very bad, so can you give me an example of how to do it, or direct me to some tutorial/how-to where I can find the info myself?

Excuse me for asking to be spoon-fed

Thanks again

f76 · 07-29-2004, 12:10 PM

Try this if u like.. I think u can specify ip:s to..
I know this is a reply to a dead thread but maybe bebbo is still waiting for an answer

Code:

<?php
/*
php adressing styles for linux/internet
http://se.php.net/manual/en/transports.php
*/
error_reporting(0);
$fp = fsockopen("www.test_adress.se", 80, $errno, $errstr, 30);
if (!$fp) {//if not fsockopen ok   
header("Location: http://www.it_didnt_work.se/");
   exit;
} else {
   header("Location: http://www.test_adress.se/");
   exit;
   }
   ?>

Bebo · 07-29-2004, 12:22 PM

Yes, this is indeed a forgotten thread, but thanks a lot for the reply! Unfortunately I have nowhere to test it at the moment, but some day, some day...