require 'erb' class ERB module Util HTML_ESCAPE = { '&' => '&', '>' => '>', '<' => '<', '"' => '"' } JSON_ESCAPE = { '&' => '\u0026', '>' => '\u003E', '<' => '\u003C' } # A utility method for escaping HTML tag characters. # This method is also aliased as h. # # In your ERb templates, use this method to escape any unsafe content. For example: # <%=h @person.name %> # # ==== Example: # puts html_escape("is a > 0 & a < 10?") # # => is a > 0 & a < 10? def html_escape(s) s = s.to_s if s.html_safe? s else s.gsub(/[&"><]/) { |special| HTML_ESCAPE[special] }.html_safe! end end alias h html_escape module_function :html_escape module_function :h # A utility method for escaping HTML entities in JSON strings. # This method is also aliased as j. # # In your ERb templates, use this method to escape any HTML entities: # <%=j @person.to_json %> # # ==== Example: # puts json_escape("is a > 0 & a < 10?") # # => is a \u003E 0 \u0026 a \u003C 10? def json_escape(s) s.to_s.gsub(/[&"><]/) { |special| JSON_ESCAPE[special] } end alias j json_escape module_function :j module_function :json_escape end end