Don't explode from invalid XML

xml_parse.rb

# This implmements a custom parse strategy of XML. It's exactly the same as Rails (Hash.from_xml)
# except that it rescues syntax errors instead of exploding.
ActionController::Base.param_parsers[Mime::XML] = Proc.new do |body|
  if body.blank?
    {}.with_indifferent_access
  else
    begin
      Hash.from_xml(body).with_indifferent_access
    rescue Nokogiri::XML::SyntaxError => e
      Mouth.increment("corner_cases.nokogiri_syntax_error")
      {}.with_indifferent_access
    end
  end
end