File: xml_mini.rb

package info (click to toggle)
rails 2:4.1.8-1+deb8u4
  • links: PTS, VCS
  • area: main
  • in suites:
  • size: 22,132 kB
  • ctags: 27,642
  • sloc: ruby: 172,886; sql: 43; yacc: 43; sh: 14; makefile: 12
file content (194 lines) | stat: -rw-r--r-- 6,023 bytes parent folder | download | duplicates (2)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
require 'time'
require 'base64'
require 'bigdecimal'
require 'active_support/core_ext/module/delegation'
require 'active_support/core_ext/string/inflections'
require 'active_support/core_ext/date_time/calculations'

module ActiveSupport
  # = XmlMini
  #
  # To use the much faster libxml parser:
  #   gem 'libxml-ruby', '=0.9.7'
  #   XmlMini.backend = 'LibXML'
  module XmlMini
    extend self

    # This module decorates 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

    DEFAULT_ENCODINGS = {
      "binary" => "base64"
    } unless defined?(DEFAULT_ENCODINGS)

    TYPE_NAMES = {
      "Symbol"     => "symbol",
      "Fixnum"     => "integer",
      "Bignum"     => "integer",
      "BigDecimal" => "decimal",
      "Float"      => "float",
      "TrueClass"  => "boolean",
      "FalseClass" => "boolean",
      "Date"       => "date",
      "DateTime"   => "dateTime",
      "Time"       => "dateTime",
      "Array"      => "array",
      "Hash"       => "hash"
    } unless defined?(TYPE_NAMES)

    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| ::Base64.encode64(binary) },
      "yaml"     => Proc.new { |yaml| yaml.to_yaml }
    } unless defined?(FORMATTING)

    # TODO use regexp instead of Date.parse
    unless defined?(PARSING)
      PARSING = {
        "symbol"       => Proc.new { |symbol|  symbol.to_s.to_sym },
        "date"         => Proc.new { |date|    ::Date.parse(date) },
        "datetime"     => Proc.new { |time|    Time.xmlschema(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.to_s.strip) },
        "string"       => Proc.new { |string|  string.to_s },
        "yaml"         => Proc.new { |yaml|    YAML::load(yaml) rescue yaml },
        "base64Binary" => Proc.new { |bin|     ::Base64.decode64(bin) },
        "binary"       => Proc.new { |bin, entity| _parse_binary(bin, entity) },
        "file"         => Proc.new { |file, entity| _parse_file(file, entity) }
      }

      PARSING.update(
        "double"   => PARSING["float"],
        "dateTime" => PARSING["datetime"]
      )
    end

    attr_accessor :depth
    self.depth = 100

    delegate :parse, :to => :backend

    def backend
      current_thread_backend || @backend
    end

    def backend=(name)
      backend = name && cast_backend_name_to_module(name)
      self.current_thread_backend = backend if current_thread_backend
      @backend = backend
    end

    def with_backend(name)
      old_backend = current_thread_backend
      self.current_thread_backend = name && cast_backend_name_to_module(name)
      yield
    ensure
      self.current_thread_backend = old_backend
    end

    def to_tag(key, value, options)
      type_name = options.delete(:type)
      merged_options = options.merge(:root => key, :skip_instruct => true)

      if value.is_a?(::Method) || value.is_a?(::Proc)
        if value.arity == 1
          value.call(merged_options)
        else
          value.call(merged_options, key.to_s.singularize)
        end
      elsif value.respond_to?(:to_xml)
        value.to_xml(merged_options)
      else
        type_name ||= TYPE_NAMES[value.class.name]
        type_name ||= value.class.name if value && !value.respond_to?(:to_str)
        type_name   = type_name.to_s   if type_name
        type_name   = "dateTime" if type_name == "datetime"

        key = rename_key(key.to_s, options)

        attributes = options[:skip_types] || type_name.nil? ? { } : { :type => type_name }
        attributes[:nil] = true if value.nil?

        encoding = options[:encoding] || DEFAULT_ENCODINGS[type_name]
        attributes[:encoding] = encoding if encoding

        formatted_value = FORMATTING[type_name] && !value.nil? ?
          FORMATTING[type_name].call(value) : value

        options[:builder].tag!(key, formatted_value, attributes)
      end
    end

    def rename_key(key, options = {})
      camelize  = options[:camelize]
      dasherize = !options.has_key?(:dasherize) || options[:dasherize]
      if camelize
        key = true == camelize ? key.camelize : key.camelize(camelize)
      end
      key = _dasherize(key) if dasherize
      key
    end

    protected

    def _dasherize(key)
      # $2 must be a non-greedy regex for this to work
      left, middle, right = /\A(_*)(.*?)(_*)\Z/.match(key.strip)[1,3]
      "#{left}#{middle.tr('_ ', '--')}#{right}"
    end

    # TODO: Add support for other encodings
    def _parse_binary(bin, entity) #:nodoc:
      case entity['encoding']
      when 'base64'
        ::Base64.decode64(bin)
      else
        bin
      end
    end

    def _parse_file(file, entity)
      f = StringIO.new(::Base64.decode64(file))
      f.extend(FileLike)
      f.original_filename = entity['name']
      f.content_type = entity['content_type']
      f
    end

    private

      def current_thread_backend
        Thread.current[:xml_mini_backend]
      end

      def current_thread_backend=(name)
        Thread.current[:xml_mini_backend] = name && cast_backend_name_to_module(name)
      end

      def cast_backend_name_to_module(name)
        if name.is_a?(Module)
          name
        else
          require "active_support/xml_mini/#{name.downcase}"
          ActiveSupport.const_get("XmlMini_#{name}")
        end
      end
  end

  XmlMini.backend = 'REXML'
end