check if id is passed as a query parameter and dont add if it is

server.rb

@@ -23,7 +23,8 @@
 
   if req.request_method == 'POST'
     # Assume it's well formed
-    comment = { id: (Time.now.to_f * 1000).to_i }
+    comment = {}
+    comment[:id] = (Time.now.to_f * 1000).to_i if !req.query.include?("id")
     req.query.each do |key, value|
       comment[key] = value.force_encoding('UTF-8')
     end