added HEAD route for accessible requests

1 files changed, 6 insertions, 1 deletions

diff --git a/lib/opentox.rb b/lib/opentox.rb
index 8e20ab2..f1ae2d1 100644
--- a/lib/opentox.rb
+++ b/lib/opentox.rb
@@ -109,7 +109,12 @@ module OpenTox
     # HEAD route for service check
     # algorithm, compound and validation overwrite this
     head "/#{SERVICE}/?" do
-      #$logger.debug "#{SERVICE.capitalize} service is running."
+    end
+
+    # HEAD request for object in backend
+    # algorithm, dataset, compound and validation overwrite this
+    head "/#{SERVICE}/:id/?" do
+      resource_not_found_error "#{uri} not found." unless FourStore.head(@uri)
     end
 
     # Get a list of objects at the server or perform a SPARQL query