Do not send rack.input or any other rack information to AD listeners.

actionpack/lib/action_dispatch/middleware/notifications.rb

@@ -8,17 +8,24 @@ module ActionDispatch
       @app = app
     end
 
-    def call(stack_env)
-      env = stack_env.dup
-      ActiveSupport::Notifications.instrument("action_dispatch.before_dispatch", :env => env)
+    def call(env)
+      payload = retrieve_payload_from_env(env)
+      ActiveSupport::Notifications.instrument("action_dispatch.before_dispatch", payload)
 
-      ActiveSupport::Notifications.instrument!("action_dispatch.after_dispatch", :env => env) do
-        @app.call(stack_env)
+      ActiveSupport::Notifications.instrument!("action_dispatch.after_dispatch", payload) do
+        @app.call(env)
       end
     rescue Exception => exception
       ActiveSupport::Notifications.instrument('action_dispatch.exception',
-        :env => stack_env, :exception => exception)
+        :env => env, :exception => exception)
       raise exception
     end
+
+  protected
+
+    # Remove any rack related constants from the env, like rack.input.
+    def retrieve_payload_from_env(env)
+      Hash[:env => env.except(*env.keys.select { |k| k.to_s.index("rack.") == 0 })]
+    end
   end
 end

actionpack/lib/action_dispatch/railties/subscriber.rb

@@ -5,8 +5,8 @@ module ActionDispatch
         request = Request.new(event.payload[:env])
         path    = request.request_uri.inspect rescue "unknown"
 
-        info "\n\nProcessing #{path} to #{request.formats.join(', ')} " <<
-             "(for #{request.remote_ip} at #{event.time.to_s(:db)}) [#{request.method.to_s.upcase}]"
+        info "\n\nStarted #{request.method.to_s.upcase} #{path} " <<
+             "for #{request.remote_ip} at #{event.time.to_s(:db)}"
       end
 
       def logger

actionpack/test/dispatch/subscriber_test.rb

@@ -78,9 +78,8 @@ module DispatcherSubscriberTest
     log = @logger.logged(:info).first
     assert_equal 1, @logger.logged(:info).size
 
-    assert_match %r{^Processing "/" to text/html}, log
-    assert_match %r{\(for 127\.0\.0\.1}, log
-    assert_match %r{\[GET\]}, log
+    assert_match %r{^Started GET "/"}, log
+    assert_match %r{for 127\.0\.0\.1}, log
   end
 
   def test_subscriber_has_its_logged_flushed_after_request