1 files changed, 22 insertions, 0 deletions
diff --git a/lib/active_storage/controllers/variants_controller.rb b/lib/active_storage/controllers/variants_controller.rb
new file mode 100644
index 0000000000..24cee16e80
--- /dev/null
+++ b/lib/active_storage/controllers/variants_controller.rb
@@ -0,0 +1,22 @@
+require "action_controller"
+require "active_storage/blob"
+
+class ActiveStorage::Controllers::VariantsController < ActionController::Base
+  def show
+    if blob_key = decode_verified_key
+      variant = ActiveStorage::Variant.lookup(blob_key: blob_key, variation_key: params[:variation_key])
+      redirect_to variant.url
+    else
+      head :not_found
+    end
+  end
+
+  private
+    def decode_verified_key
+      ActiveStorage::VerifiedKeyWithExpiration.decode(params[:encoded_key])
+    end
+
+    def disposition_param
+      params[:disposition].presence_in(%w( inline attachment )) || 'inline'
+    end
+end