✨change send_data to send_file call, so it will benifit from upstream thruster X-Sendfile function.

Author: Eric-Guo

app/controllers/employees_controller.rb

@@ -1,4 +1,6 @@
 require 'csv'
+require 'tempfile'
+require 'rack/body_proxy'
 
 class EmployeesController < ApplicationController
   include Pagy::Backend
@@ -43,7 +45,21 @@ def report
             csv << values
           end
         end
-        send_data "\xEF\xBB\xBF" << csv_res
+        report_filename = 'user_report.csv'
+        temp_file = Tempfile.new(['user_report', '.csv'], Rails.root.join('tmp'))
+        temp_file.binmode
+        temp_file.write("\xEF\xBB\xBF")
+        temp_file.write(csv_res)
+        temp_file.flush
+
+        send_file temp_file.path,
+                  filename: report_filename,
+                  type: 'text/csv; charset=utf-8',
+                  disposition: 'attachment'
+
+        response.body = Rack::BodyProxy.new(response.stream) do
+          temp_file.close!
+        end
       end
     end
   end