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-rw-r--r--actionpack/lib/action_dispatch/http/mime_negotiation.rb18
1 files changed, 11 insertions, 7 deletions
diff --git a/actionpack/lib/action_dispatch/http/mime_negotiation.rb b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
index a2cac49082..ac0ff133eb 100644
--- a/actionpack/lib/action_dispatch/http/mime_negotiation.rb
+++ b/actionpack/lib/action_dispatch/http/mime_negotiation.rb
@@ -62,13 +62,7 @@ module ActionDispatch
def formats
fetch_header("action_dispatch.request.formats") do |k|
- params_readable = begin
- parameters[:format]
- rescue *RESCUABLE_MIME_FORMAT_ERRORS
- false
- end
-
- v = if params_readable
+ v = if params_readable?
Array(Mime[parameters[:format]])
elsif use_accept_header && valid_accept_header
accepts
@@ -153,9 +147,19 @@ module ActionDispatch
order.include?(Mime::ALL) ? format : nil
end
+ def should_apply_vary_header?
+ !params_readable? && use_accept_header && valid_accept_header
+ end
+
private
BROWSER_LIKE_ACCEPTS = /,\s*\*\/\*|\*\/\*\s*,/
+ def params_readable? # :doc:
+ parameters[:format]
+ rescue *RESCUABLE_MIME_FORMAT_ERRORS
+ false
+ end
+
def valid_accept_header # :doc:
(xhr? && (accept.present? || content_mime_type)) ||
(accept.present? && accept !~ BROWSER_LIKE_ACCEPTS)