While I was suffering the interwebs my eyes caught a perl script which prints out the environment variables. For example something like this.
use CGI;
$cgi = new CGI;
for $key ( $cgi->param() ) {
$input{$key} = $cgi->param($key);
}
print qq{Content-type: text/html
<html><head></head><body>
};
foreach $key (sort (keys %ENV)) {
print $key, ' = ', $ENV{$key}, "<br>\n";
}
for $key ( keys %input ) {
print $key, ' = ', $input{$key}, "<br>\n";
}
print qq{<form METHOD=POST><input type="submit" value="Post Request">
<input name="postfield"></form>};
print qq{<form METHOD=GET ><input type="submit" value="Get Request ">
<input name="getfield" ></form>};
print qq{</body></html>};