cleanup/DRY/exception handling changes

config.ru

@@ -7,8 +7,9 @@ require File.join(File.dirname(__FILE__), 'app')
 set :env, :development
 set :root, File.dirname(__FILE__)
 set :server, %[thin mongrel webrick]
-set :logging, true if development?
-set :raise_errors, true if development?
+set :logging, true
+set :raise_errors, false
+set :show_exceptions, false
 disable :run
 
 run Sinatra::Application

helpers.rb

@@ -16,13 +16,21 @@ helpers do
   end 
 
   def host_service(hostname, servicename)
-    id = Host.find(:name => hostname).first.id
-    Service.find(:host_id => id, :name => servicename).first
+    h = Host.find(:name => hostname).first
+    if h.nil?
+      nil
+    else  
+      Service.find(:host_id => h.id, :name => servicename).first
+    end  
   end
 
   def host_services(hostname)
-    id = Host.find(:name => hostname).first.id
-    Services.all(:host_id => id)
+    h = Host.find(:name => hostname).first
+    if h.nil?
+      nil
+    else  
+      Services.all(:host_id => id)
+    end  
   end 
 
   def application(opts = {})

views/404.erb

+{
+  "result":"failure",
+  "error_message":"Resource not found"
+}  

views/500.erb

+{
+  "result":"failure",
+  "error_message":"<%= request.env['sinatra.error'].message %>"
+}