require 'cgi' require 'action_controller/vendor/xml_simple' # Static methods for parsing the query and request parameters that can be used in # a CGI extension class or testing in isolation. class CGIMethods #:nodoc: public # Returns a hash with the pairs from the query string. The implicit hash construction that is done in # parse_request_params is not done here. def CGIMethods.parse_query_parameters(query_string) parsed_params = {} query_string.split(/[&;]/).each { |p| k, v = p.split('=',2) v = nil if (!v.nil? && v.empty?) k = CGI.unescape(k) unless k.nil? v = CGI.unescape(v) unless v.nil? keys = split_key(k) last_key = keys.pop last_key = keys.pop if (use_array = last_key.empty?) parent = keys.inject(parsed_params) {|h, k| h[k] ||= {}} if use_array then (parent[last_key] ||= []) << v else parent[last_key] = v end } return parsed_params end # Returns the request (POST/GET) parameters in a parsed form where pairs such as "customer[address][street]" / # "Somewhere cool!" are translated into a full hash hierarchy, like # { "customer" => { "address" => { "street" => "Somewhere cool!" } } } def CGIMethods.parse_request_parameters(params) parsed_params = {} for key, value in params value = [value] if key =~ /.*\[\]$/ CGIMethods.build_deep_hash( CGIMethods.get_typed_value(value[0]), parsed_params, CGIMethods.get_levels(key) ) end return parsed_params end def self.parse_formatted_request_parameters(format, raw_post_data) case format when :xml return XmlSimple.xml_in(raw_post_data, 'ForceArray' => false) when :yaml return YAML.load(raw_post_data) end rescue Object => e { "exception" => "#{e.message} (#{e.class})", "backtrace" => e.backtrace, "raw_post_data" => raw_post_data, "format" => format } end private # Splits the given key into several pieces. Example keys are 'name', 'person[name]', # 'person[name][first]', and 'people[]'. In each instance, an Array instance is returned. # 'person[name][first]' produces ['person', 'name', 'first']; 'people[]' produces ['people', ''] def CGIMethods.split_key(key) if /^([^\[]+)((?:\[[^\]]*\])+)$/ =~ key keys = [$1] keys.concat($2[1..-2].split('][')) keys << '' if key[-2..-1] == '[]' # Have to add it since split will drop empty strings return keys else return [key] end end def CGIMethods.get_typed_value(value) if value.respond_to?(:content_type) && !value.content_type.empty? # Uploaded file value elsif value.respond_to?(:read) # Value as part of a multipart request value.read elsif value.class == Array value.collect { |v| CGIMethods.get_typed_value(v) } else # Standard value (not a multipart request) value.to_s end end PARAMS_HASH_RE = /^([^\[]+)(\[.*\])?(.)?.*$/ def CGIMethods.get_levels(key) all, main, bracketed, trailing = PARAMS_HASH_RE.match(key).to_a if main.nil? [] elsif trailing [key] elsif bracketed [main] + bracketed.slice(1...-1).split('][') else [main] end end def CGIMethods.build_deep_hash(value, hash, levels) if levels.length == 0 value elsif hash.nil? { levels.first => CGIMethods.build_deep_hash(value, nil, levels[1..-1]) } else hash.update({ levels.first => CGIMethods.build_deep_hash(value, hash[levels.first], levels[1..-1]) }) end end end