gistfile1.js

      function process_tree(queue){
          if(queue.length >= 0){
            var node = queue.pop();
            client.get(node.id, function(err, result){
              node.count = result;
              for(var child in node.children){
                queue.push(node.children[child]);
              }
              process_tree(queue);
            });
          }else{
              response.header("Access-Control-Allow-Origin", "*");
              response.header("Access-Control-Allow-Methods", "GET");
              response.header("Access-Control-Allow-Headers", "*");
              response.header("Content-Type", "application/json");
              response.end(JSON.stringify(viewOptions.locals.categories));
          }
      }