Redmine

At Planio sometimes see users trying to make API requests using the HTTP Accept: application/json header but forgetting to add .json at the end of the path. This currently leads to a raise with a 500 Internal Server Error.

We propose the following patch to correctly return a 406 Not Acceptable (this is the same HTTP status Rails uses when the passed Accept HTTP header can not be served), log the error instead of raise-ing, and returning a helpful message in the HTTP response.

diff --git a/lib/redmine/views/builders.rb b/lib/redmine/views/builders.rb
index 653c1bd6b..3c977df67 100644
--- a/lib/redmine/views/builders.rb
+++ b/lib/redmine/views/builders.rb
@@ -30,7 +30,9 @@ module Redmine
             when 'xml',  :xml  then Builders::Xml.new(request, response)
             when 'json', :json then Builders::Json.new(request, response)
             else
-              raise "No builder for format #{format}" 
+              Rails.logger.error "No builder for format #{format.inspect}" 
+              response.status = 406
+              return "We couldn't handle your request, sorry. If you were trying to access the API, make sure to append .json or .xml to your request URL.\n" 
             end
           if block_given?
             yield(builder)