add domain checking method

minder.rb

@@ -4,6 +4,8 @@
 require 'yaml'
 require 'xmpp4r-simple'
 
+TIMEOUT = 10 # max time to attempt to access each domain
+
 # globals
 $user = nil
 $pass = nil
@@ -27,6 +29,22 @@ def message(msg)
   sleep 1
 end
 
+def can_read_domain?(domain)
+  print "Checking #{domain}: "
+  url = "http://#{domain}/"
+  begin 
+    Timeout::timeout(TIMEOUT) do
+      open(url, 'Cache-Control' => 'no-cache').read
+    end
+  rescue Timeout::Error
+    puts 'down!'
+    false
+  else
+    puts 'ok'
+    true
+  end
+end
+
 def main
   load_config
 end