aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_controller/url_rewriter.rb
blob: 3364262e4ca0894e7a2d86b507d744a539d5150f (plain) (blame)
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
module ActionController
  # Rewrites URLs for Base.redirect_to and Base.url_for in the controller.
  class UrlRewriter #:nodoc:
    RESERVED_OPTIONS = [:anchor, :params, :path_params, :only_path, :host, :protocol]
    def initialize(request, parameters)
      @request, @parameters = request, parameters
      @rewritten_path = @request.path ? @request.path.dup : ""
    end
    
    def rewrite(options = {})
      validate_options(VALID_OPTIONS, options.keys)

      rewrite_url(
        rewrite_path(@rewritten_path, resolve_aliases(options)), 
        options
      )
    end

    def to_s
      to_str
    end

    def to_str
  		"#{@request.protocol}, #{@request.host_with_port}, #{@request.path}, #{@parameters[:controller]}, #{@parameters[:action]}, #{@request.parameters.inspect}"
    end

    private
      def validate_options(valid_option_keys, supplied_option_keys)
        unknown_option_keys = supplied_option_keys - valid_option_keys
        raise(ActionController::ActionControllerError, "Unknown options: #{unknown_option_keys}") unless unknown_option_keys.empty?
      end
  
      def resolve_aliases(options)
        options[:controller_prefix] = options[:module] unless options[:module].nil?
        options
      end

      def rewrite_url(path, options)        
        rewritten_url = ""
        rewritten_url << (options[:protocol] || @request.protocol) unless options[:only_path]
        rewritten_url << (options[:host] || @request.host_with_port) unless options[:only_path]

        rewritten_url << options[:application_prefix] if options[:application_prefix]
        rewritten_url << path
        rewritten_url << build_query_string(new_parameters(options)) if options[:params] || options[:overwrite_params]
        rewritten_url << "##{options[:anchor]}" if options[:anchor]
        return rewritten_url
      end

      def rewrite_path(options)
        options = options.symbolize_keys
        RESERVED_OPTIONS.each {|k| options.delete k}
        
        path, extras = Routing::Routes.generate(options, @request)
        path = "/#{path.join('/')}"
        path += build_query_string(extras)
        
        return path
      end

      def rewrite_path_params(path, options)
        index_action = options[:action] == 'index' || options[:action].nil? && @action == 'index'
        id_only = options[:path_params].size == 1 && options[:path_params]['id']

        if index_action && id_only
          path += '/' unless path[-1..-1] == '/'
          path += "index/#{options[:path_params]['id']}"
          path
        else
          options[:path_params].inject(path) do |path, pair|
            if options[:action].nil? && @request.parameters[pair.first]
              path.sub(/\b#{@request.parameters[pair.first]}\b/, pair.last.to_s)
            else
              path += "/#{pair.last}"
            end
          end
        end
      end

      def rewrite_action(path, options)
        # This regex assumes that "index" actions won't be included in the URL
        all, controller_prefix, action_prefix, action_suffix =
          /^\/(.*)#{@controller}\/(.*)#{@action == "index" ? "" : @action}(.*)/.match(path).to_a

        if @action == "index" 
          if action_prefix == "index" 
            # we broke the parsing assumption that this would be excluded, so
            # don't tell action_name about our little boo-boo
            path = path.sub(action_prefix, action_name(options, nil))
          elsif action_prefix && !action_prefix.empty?
            path = path.sub(%r(/#{action_prefix}/?), "/" + action_name(options, action_prefix))
          else
            path = path.sub(%r(#{@controller}/?$), @controller + "/" + action_name(options)) # " ruby-mode
          end
        else
          path = path.sub(
            @controller + "/" + (action_prefix || "") + @action + (action_suffix || ""), 
            @controller + "/" + action_name(options, action_prefix)
          )
        end

        if options[:controller_prefix] && !options[:controller]
          ensure_slash_suffix(options, :controller_prefix)
          if controller_prefix
            path = path.sub(controller_prefix, options[:controller_prefix])
          else
            path = options[:controller_prefix] + path
          end
        end
        
        return path
      end

      def rewrite_controller(path, options)
        all, controller_prefix = /^\/(.*?)#{@controller}/.match(path).to_a
        path = "/"
        path << controller_name(options, controller_prefix)
        path << action_name(options) if options[:action]
        path << path_params_in_list(options) if options[:path_params]
        return path
      end

      def action_name(options, action_prefix = nil, action_suffix = nil)
        ensure_slash_suffix(options, :action_prefix)
        ensure_slash_prefix(options, :action_suffix)

        prefix = options[:action_prefix] || action_prefix || ""
        suffix = options[:action] == "index" ? "" : (options[:action_suffix] || action_suffix || "")
        name   = (options[:action] == "index" ? "" : options[:action]) || ""

        return prefix + name + suffix
      end
      
      def controller_name(options, controller_prefix)
        ensure_slash_suffix(options, :controller_prefix)

        controller_name = case options[:controller_prefix]
          when String:  options[:controller_prefix]
          when false : ""
          when nil   : controller_prefix || ""
        end

        controller_name << (options[:controller] + "/") if options[:controller] 
        return controller_name
      end
      
      def path_params_in_list(options)
        options[:path_params].inject("") { |path, pair| path += "/#{pair.last}" }
      end

      def ensure_slash_suffix(options, key)
        options[key] = options[key] + "/" if options[key] && !options[key].empty? && options[key][-1..-1] != "/"
      end

      def ensure_slash_prefix(options, key)
        options[key] = "/" + options[key] if options[key] && !options[key].empty? && options[key][0..1] != "/"
      end

      def include_id_in_path_params(options)
        options[:path_params] = (options[:path_params] || {}).merge({"id" => options[:id]}) if options[:id]
      end

      def new_parameters(options)
        parameters = options[:params] || existing_parameters
        parameters.update(options[:overwrite_params]) if options[:overwrite_params]
        parameters.reject { |key,value| value.nil? }
      end

      def existing_parameters
        @request.parameters.reject { |key, value| %w( id action controller).include?(key) }
      end

      # Returns a query string with escaped keys and values from the passed hash. If the passed hash contains an "id" it'll
      # be added as a path element instead of a regular parameter pair.
      def build_query_string(hash)
        elements = []
        query_string = ""

        hash.each do |key, value|
          key = CGI.escape key
          key += '[]' if value.class == Array
          value = [ value ] unless value.class == Array
          value.each { |val| elements << "#{key}=#{CGI.escape(val.to_s)}" }
      	end

        unless elements.empty? then query_string << ("?" + elements.join("&")) end
        
        return query_string
      end
  end
end