Redirecting failed proxy request to valid page
Web2 and caching example from a Well House Consultants training course
More on Web2 and caching [link]
Source code: proxydown.php Module: H307
# Redirecting failed proxy request to valid page
/* If you have a proxy server that's occasionally unavailiable, you
might like to use a script like this rather than a regula error page
and you can then send out a cached page ... being in PHP, you can log
and count failures, and decide to start echoing hard errors if the
problem persists ... */
/* add a line such as:
ErrorDocument 503 "/proxydown.php"
into your httpd.conf or your .htaccess file ... and this script
is a sample proxydown.php */
# Send out code 200, even though this is the error 503 handler!
header("HTTP/1.1 200 OK");
$requested = $_SERVER["REQUEST_URI"];
$gotinstead = $_SERVER["PHP_SELF"];
# Sample log file record:
/* 192.168.200.199 - - [08/Feb/2013:17:42:17 +0000] "GET /dryfeet
HTTP/1.1" 20 0 189 "-" "Mozilla/5.0 (Macintosh; U; Intel Mac
OS X 10_6_4; en-us) AppleWe bKit/533.16 (KHTML, like Gecko)
Version/5.0 Safari/533.16" */
<title>Unable to contact requested onward service</title>
<h1>Onward Service not available</h1>
You called for <?php print($requested); ?> but it is not available<br />
You got instead <?php print($gotinstead); ?><br />
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