Fix overly permissive hostname validation, fix host check

`[\w\W]` matches EVERYTHING. Validation failed. Also remove `\d` as that
`\w` is a superset of it.

Also check that the host parameter is actually non-empty, otherwise
`collectd_plugins` will happily return results as the directory
`$CONFIG['datadir'] . '/' . ''` trivially exists...

1 files changed, 1 insertions, 1 deletions

diff --git a/host.php b/host.php
index 97f4dae..a19aecc 100644
--- a/host.php
+++ b/host.php
@@ -15,7 +15,7 @@ printf("<fieldset id=\"%s\">", htmlentities($host));
 printf("<legend>%s</legend>", htmlentities($host));
 
 
-if (!$plugins = collectd_plugins($host)) {
+if (!strlen($host) || !$plugins = collectd_plugins($host)) {
         echo "Unknown host\n";
         return false;
 }