Author: Michał M. Sapka <firstname.lastname@example.org>
Date: Wed, 1 Feb 2023 18:15:59 +0100
article for 2023-02-01
2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/content/2023/http-headers-in-rails-hyphens-and-underscores.md b/content/2023/http-headers-in-rails-hyphens-and-underscores.md
@@ -0,0 +1,18 @@
+title: "HTTP Headers in Rails: Hyphens, Underscores, and a terrible day"
+abstract: Rack modyfies incomming requests's headers!
+tags: ['rack', 'ruby-on-rails', 'headers', 'magic']
+Everyone's favorite magician, Ruby on Rails, does it again.
+As it [Rack modifies incoming requests' headers](https://github.com/rails/rails/blob/aaf7bed00338c3a97dbb12b3c82a30ae34e67876/actionpack/lib/action_dispatch/http/headers.rb#L12) and normalizes they keys. So, every time the client/proxy sends something cool like `A-HEADER`, the key is modified, so some characters become underscore. Therefore in Rails code need to access `A_HEADER`, and if I had known that yesterday, my day would be much more pleasant.
+> Also note that when headers are mapped to CGI-like variables by the Rack
+> server, both dashes and underscores are converted to underscores.
+> (as [per documentation](https://github.com/rails/rails/blob/aaf7bed00338c3a97dbb12b3c82a30ae34e67876/actionpack/lib/action_dispatch/http/headers.rb#L12)
diff --git a/content/2023/http-headers-in-rails-hyphens-and-underscores.md~ b/content/2023/http-headers-in-rails-hyphens-and-underscores.md~
@@ -0,0 +1,10 @@
+title: "Http Headers in Rails Hyphens and Underscores"