implement rfc090 for named nodes endpoint

.travis.yml

@@ -15,6 +15,9 @@ cache: bundler
 script:
   - bundle update
   - bundle exec rake pedant
+env:
+  global:
+    - "PEDANT_OPTS=\"--skip-oc_id\""
 
 matrix:
   include:

lib/chef_zero/endpoints/node_endpoint.rb

@@ -20,6 +20,10 @@ def put(request)
         super(request)
       end
 
+      def head(request)
+        head_request(request)
+      end
+
       def populate_defaults(request, response_json)
         node = FFI_Yajl::Parser.parse(response_json)
         node = ChefData::DataNormalizer.normalize_node(node, request.rest_path[3])

lib/chef_zero/rest_base.rb

@@ -231,6 +231,16 @@ def text_response(response_code, text)
       [response_code, { "Content-Type" => "text/plain" }, text]
     end
 
+    # rfc090 returns 404 error or 200 with an emtpy body
+    # @param [ChefZero::RestRequest] request The HTTP request object
+    #
+    # @return (see #json_response)
+    #
+    def head_request(request)
+      get_data(request) # will raise 404 if non-existant
+      json_response(200, nil)
+    end
+
     # Returns an Array with the response code, HTTP headers, and JSON body.
     #
     # @param [Fixnum] response_code The HTTP response code