normalize client ip

lib/normalize_client_ip_middleware.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+class NormalizeClientIpMiddleware
+  def initialize(app)
+    @app = app
+  end
+
+  def call(env)
+    if env['HTTP_CLIENT_IP'].present? && env['HTTP_X_CLIENT_IP'].present? &&
+       env['HTTP_CLIENT_IP'].starts_with?("#{env['HTTP_X_CLIENT_IP']}:")
+      env['HTTP_CLIENT_IP'] = env['HTTP_X_CLIENT_IP']
+    end
+
+    @app.call(env)
+  end
+end