Extract #head into its own module and simplify it

1 files changed, 27 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/metal/head.rb b/actionpack/lib/action_controller/metal/head.rb
new file mode 100644
index 0000000000..68fa0a0402
--- /dev/null
+++ b/actionpack/lib/action_controller/metal/head.rb
@@ -0,0 +1,27 @@
+module ActionController
+  module Head
+    # Return a response that has no content (merely headers). The options
+    # argument is interpreted to be a hash of header names and values.
+    # This allows you to easily return a response that consists only of
+    # significant headers:
+    #
+    #   head :created, :location => person_path(@person)
+    #
+    # It can also be used to return exceptional conditions:
+    #
+    #   return head(:method_not_allowed) unless request.post?
+    #   return head(:bad_request) unless valid_request?
+    #   render
+    def head(status, options = {})
+      options, status = status, nil if status.is_a?(Hash)
+      status ||= options.delete(:status) || :ok
+      location = options.delete(:location)
+
+      options.each do |key, value|
+        headers[key.to_s.dasherize.split(/-/).map { |v| v.capitalize }.join("-")] = value.to_s
+      end
+
+      render :nothing => true, :status => status, :location => location
+    end
+  end
+end
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