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require 'date'
require 'cgi'
require 'builder'
require 'xmlsimple'
# Locked down XmlSimple#xml_in_string
class XmlSimple
# Same as xml_in but doesn't try to smartly shoot itself in the foot.
def xml_in_string(string, options = nil)
handle_options('in', options)
@doc = parse(string)
result = collapse(@doc.root)
if @options['keeproot']
merge({}, @doc.root.name, result)
else
result
end
end
def self.xml_in_string(string, options = nil)
new.xml_in_string(string, options)
end
end
# This module exists to decorate files deserialized using Hash.from_xml with
# the <tt>original_filename</tt> and <tt>content_type</tt> methods.
module FileLike #:nodoc:
attr_writer :original_filename, :content_type
def original_filename
@original_filename || 'untitled'
end
def content_type
@content_type || 'application/octet-stream'
end
end
module ActiveSupport #:nodoc:
module CoreExtensions #:nodoc:
module Hash #:nodoc:
module Conversions
XML_TYPE_NAMES = {
"Symbol" => "symbol",
"Fixnum" => "integer",
"Bignum" => "integer",
"BigDecimal" => "decimal",
"Float" => "float",
"Date" => "date",
"DateTime" => "datetime",
"Time" => "datetime",
"TrueClass" => "boolean",
"FalseClass" => "boolean"
} unless defined?(XML_TYPE_NAMES)
XML_FORMATTING = {
"symbol" => Proc.new { |symbol| symbol.to_s },
"date" => Proc.new { |date| date.to_s(:db) },
"datetime" => Proc.new { |time| time.xmlschema },
"binary" => Proc.new { |binary| ActiveSupport::Base64.encode64(binary) },
"yaml" => Proc.new { |yaml| yaml.to_yaml }
} unless defined?(XML_FORMATTING)
# TODO: use Time.xmlschema instead of Time.parse;
# use regexp instead of Date.parse
unless defined?(XML_PARSING)
XML_PARSING = {
"symbol" => Proc.new { |symbol| symbol.to_sym },
"date" => Proc.new { |date| ::Date.parse(date) },
"datetime" => Proc.new { |time| ::Time.parse(time).utc rescue ::DateTime.parse(time).utc },
"integer" => Proc.new { |integer| integer.to_i },
"float" => Proc.new { |float| float.to_f },
"decimal" => Proc.new { |number| BigDecimal(number) },
"boolean" => Proc.new { |boolean| %w(1 true).include?(boolean.strip) },
"string" => Proc.new { |string| string.to_s },
"yaml" => Proc.new { |yaml| YAML::load(yaml) rescue yaml },
"base64Binary" => Proc.new { |bin| ActiveSupport::Base64.decode64(bin) },
"file" => Proc.new do |file, entity|
f = StringIO.new(ActiveSupport::Base64.decode64(file))
f.extend(FileLike)
f.original_filename = entity['name']
f.content_type = entity['content_type']
f
end
}
XML_PARSING.update(
"double" => XML_PARSING["float"],
"dateTime" => XML_PARSING["datetime"]
)
end
def self.included(klass)
klass.extend(ClassMethods)
end
# Converts a hash into a string suitable for use as a URL query string. An optional <tt>namespace</tt> can be
# passed to enclose the param names (see example below).
#
# ==== Example:
# { :name => 'David', :nationality => 'Danish' }.to_query # => "name=David&nationality=Danish"
#
# { :name => 'David', :nationality => 'Danish' }.to_query('user') # => "user%5Bname%5D=David&user%5Bnationality%5D=Danish"
def to_query(namespace = nil)
collect do |key, value|
value.to_query(namespace ? "#{namespace}[#{key}]" : key)
end.sort * '&'
end
alias_method :to_param, :to_query
def to_xml(options = {})
options[:indent] ||= 2
options.reverse_merge!({ :builder => Builder::XmlMarkup.new(:indent => options[:indent]),
:root => "hash" })
options[:builder].instruct! unless options.delete(:skip_instruct)
dasherize = !options.has_key?(:dasherize) || options[:dasherize]
root = dasherize ? options[:root].to_s.dasherize : options[:root].to_s
options[:builder].__send__(:method_missing, root) do
each do |key, value|
case value
when ::Hash
value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
when ::Array
value.to_xml(options.merge({ :root => key, :children => key.to_s.singularize, :skip_instruct => true}))
when ::Method, ::Proc
# If the Method or Proc takes two arguments, then
# pass the suggested child element name. This is
# used if the Method or Proc will be operating over
# multiple records and needs to create an containing
# element that will contain the objects being
# serialized.
if 1 == value.arity
value.call(options.merge({ :root => key, :skip_instruct => true }))
else
value.call(options.merge({ :root => key, :skip_instruct => true }), key.to_s.singularize)
end
else
if value.respond_to?(:to_xml)
value.to_xml(options.merge({ :root => key, :skip_instruct => true }))
else
type_name = XML_TYPE_NAMES[value.class.name]
key = dasherize ? key.to_s.dasherize : key.to_s
attributes = options[:skip_types] || value.nil? || type_name.nil? ? { } : { :type => type_name }
if value.nil?
attributes[:nil] = true
end
options[:builder].tag!(key,
XML_FORMATTING[type_name] ? XML_FORMATTING[type_name].call(value) : value,
attributes
)
end
end
end
yield options[:builder] if block_given?
end
end
module ClassMethods
def from_xml(xml)
# TODO: Refactor this into something much cleaner that doesn't rely on XmlSimple
typecast_xml_value(undasherize_keys(XmlSimple.xml_in_string(xml,
'forcearray' => false,
'forcecontent' => true,
'keeproot' => true,
'contentkey' => '__content__')
))
end
private
def typecast_xml_value(value)
case value.class.to_s
when 'Hash'
if value['type'] == 'array'
child_key, entries = value.detect { |k,v| k != 'type' } # child_key is throwaway
if entries.nil? || (c = value['__content__'] && c.blank?)
[]
else
case entries.class.to_s # something weird with classes not matching here. maybe singleton methods breaking is_a?
when "Array"
entries.collect { |v| typecast_xml_value(v) }
when "Hash"
[typecast_xml_value(entries)]
else
raise "can't typecast #{entries.inspect}"
end
end
elsif value.has_key?("__content__")
content = value["__content__"]
if parser = XML_PARSING[value["type"]]
if parser.arity == 2
XML_PARSING[value["type"]].call(content, value)
else
XML_PARSING[value["type"]].call(content)
end
else
content
end
elsif value['type'] == 'string' && value['nil'] != 'true'
""
# blank or nil parsed values are represented by nil
elsif value.blank? || value['nil'] == 'true'
nil
# If the type is the only element which makes it then
# this still makes the value nil, except if type is
# a xml node(where type['value'] is a Hash)
elsif value['type'] && value.size == 1 && !value['type'].is_a?(::Hash)
nil
else
xml_value = value.inject({}) do |h,(k,v)|
h[k] = typecast_xml_value(v)
h
end
# Turn { :files => { :file => #<StringIO> } into { :files => #<StringIO> } so it is compatible with
# how multipart uploaded files from HTML appear
xml_value["file"].is_a?(StringIO) ? xml_value["file"] : xml_value
end
when 'Array'
value.map! { |i| typecast_xml_value(i) }
case value.length
when 0 then nil
when 1 then value.first
else value
end
when 'String'
value
else
raise "can't typecast #{value.class.name} - #{value.inspect}"
end
end
def undasherize_keys(params)
case params.class.to_s
when "Hash"
params.inject({}) do |h,(k,v)|
h[k.to_s.tr("-", "_")] = undasherize_keys(v)
h
end
when "Array"
params.map { |v| undasherize_keys(v) }
else
params
end
end
end
end
end
end
end
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