diff options
Diffstat (limited to 'actionpack/lib/action_dispatch/http/parameters_filter.rb')
| -rw-r--r-- | actionpack/lib/action_dispatch/http/parameters_filter.rb | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/http/parameters_filter.rb b/actionpack/lib/action_dispatch/http/parameters_filter.rb new file mode 100644 index 0000000000..bec5e7427d --- /dev/null +++ b/actionpack/lib/action_dispatch/http/parameters_filter.rb @@ -0,0 +1,88 @@ +require 'active_support/core_ext/hash/keys' + +module ActionDispatch + module Http + module ParametersFilter + INTERNAL_PARAMS = %w(controller action format _method only_path) + + @@filter_parameters = nil + @@filter_parameters_block = nil + + # Specify sensitive parameters which will be replaced from the request log. + # Filters parameters that have any of the arguments as a substring. + # Looks in all subhashes of the param hash for keys to filter. + # If a block is given, each key and value of the parameter hash and all + # subhashes is passed to it, the value or key + # can be replaced using String#replace or similar method. + # + # Examples: + # + # ActionDispatch::Http::ParametersFilter.filter_parameters :password + # => replaces the value to all keys matching /password/i with "[FILTERED]" + # + # ActionDispatch::Http::ParametersFilter.filter_parameters :foo, "bar" + # => replaces the value to all keys matching /foo|bar/i with "[FILTERED]" + # + # ActionDispatch::Http::ParametersFilter.filter_parameters do |k,v| + # v.reverse! if k =~ /secret/i + # end + # => reverses the value to all keys matching /secret/i + # + # ActionDispatch::Http::ParametersFilter.filter_parameters(:foo, "bar") do |k,v| + # v.reverse! if k =~ /secret/i + # end + # => reverses the value to all keys matching /secret/i, and + # replaces the value to all keys matching /foo|bar/i with "[FILTERED]" + def self.filter_parameters(*filter_words, &block) + raise "You must filter at least one word" if filter_words.empty? and !block_given? + + @@filter_parameters = filter_words.empty? ? nil : Regexp.new(filter_words.join('|'), true) + @@filter_parameters_block = block + end + + # Return a hash of parameters with all sensitive data replaced. + def filtered_parameters + @filtered_parameters ||= process_parameter_filter(parameters) + end + alias_method :fitered_params, :filtered_parameters + + # Return a hash of request.env with all sensitive data replaced. + def filtered_env + @env.merge(@env) do |key, value| + if (key =~ /RAW_POST_DATA/i) + '[FILTERED]' + else + process_parameter_filter({key => value}, false).values[0] + end + end + end + + protected + + def process_parameter_filter(original_parameters, validate_block = true) + if @@filter_parameters or @@filter_parameters_block + filtered_params = {} + + original_parameters.each do |key, value| + if key =~ @@filter_parameters + value = '[FILTERED]' + elsif value.is_a?(Hash) + value = process_parameter_filter(value) + elsif value.is_a?(Array) + value = value.map { |item| process_parameter_filter({key => item}, validate_block).values[0] } + elsif validate_block and @@filter_parameters_block + key = key.dup + value = value.dup if value.duplicable? + value = @@filter_parameters_block.call(key, value) || value + end + + filtered_params[key] = value + end + filtered_params.except!(*INTERNAL_PARAMS) + else + original_parameters.except(*INTERNAL_PARAMS) + end + end + end + end +end
\ No newline at end of file |