twir-2025-08-09

Author: zzak

_posts/2025-08-09-this-week-in-rails.markdown

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+---
+layout: post
+title: "Support for rack.response_finished callbacks in executor"
+categories: news
+author: zzak
+og_image: assets/images/this-week-in-rails.png
+published: true
+date: 2025-08-09
+---
+
+
+Hi, it's [zzak](https://github.com/zzak). Let's explore this week's changes in the Rails codebase.
+
+[Add support for "rack.response_finished" callbacks in Action Dispatch's Executor](https://github.com/rails/rails/pull/55425)  
+The executor middleware now supports deferring completion callbacks to later in the request lifecycle by utilizing Rack's `rack.response_finished` mechanism, when available. This enables applications to define callbacks that may rely on state that would be cleaned up by the executor's completion callbacks.
+
+[Enable configuring Action View's render tracker](https://github.com/rails/rails/pull/55194)  
+You can opt-in to the new parser with `config.action_view.render_tracker = :ruby` or `load_defaults(8.1)`.
+This new render tracking implementation was added in Rails 7.2, the [RubyTracker](https://github.com/rails/rails/commit/d743a2b).
+
+[Add credentials:fetch command](https://github.com/rails/rails/pull/53119)  
+This new command allows fetching the value of a credential from the Kamal 2 credentials file.
+
+```
+$ bin/rails credentials:fetch kamal_registry/password
+```
+
+[Make Logger freeze-friendly](https://github.com/rails/rails/pull/55465)  
+Previously, you would get a `FrozenError` when trying to use a logger you called `freeze` on.
+
+[Stop trying to tidy bytes when escaping HTML](https://github.com/rails/rails/pull/55467)  
+When using `ERB::Util.html_escape` we no longer try to handle invalid UTF-8 strings, since this is an issue for handling user-input, not escaping, we can optimize this method by not doing it.
+
+_You can view the whole list of changes [here](https://github.com/rails/rails/compare/@%7B2025-08-02%7D...main@%7B2025-08-09%7D)._
+_We had [22 contributors](https://contributors.rubyonrails.org/contributors/in-time-window/20250802-20250809) to the Rails codebase this past week!_
+
+Until next time!
+
+_[Subscribe](https://world.hey.com/this.week.in.rails) to get these updates mailed to you._