aboutsummaryrefslogtreecommitdiffstats
path: root/actionpack/lib/action_dispatch/http/url.rb
blob: 28672e2a1a58815ce9cf0465c9db059bce54ac8f (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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
# frozen_string_literal: true
require "active_support/core_ext/module/attribute_accessors"

module ActionDispatch
  module Http
    module URL
      IP_HOST_REGEXP  = /\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/
      HOST_REGEXP     = /(^[^:]+:\/\/)?(\[[^\]]+\]|[^:]+)(?::(\d+$))?/
      PROTOCOL_REGEXP = /^([^:]+)(:)?(\/\/)?$/

      mattr_accessor :tld_length, default: 1

      class << self
        # Returns the domain part of a host given the domain level.
        #
        #    # Top-level domain example
        #    extract_domain('www.example.com', 1) # => "example.com"
        #    # Second-level domain example
        #    extract_domain('dev.www.example.co.uk', 2) # => "example.co.uk"
        def extract_domain(host, tld_length)
          extract_domain_from(host, tld_length) if named_host?(host)
        end

        # Returns the subdomains of a host as an Array given the domain level.
        #
        #    # Top-level domain example
        #    extract_subdomains('www.example.com', 1) # => ["www"]
        #    # Second-level domain example
        #    extract_subdomains('dev.www.example.co.uk', 2) # => ["dev", "www"]
        def extract_subdomains(host, tld_length)
          if named_host?(host)
            extract_subdomains_from(host, tld_length)
          else
            []
          end
        end

        # Returns the subdomains of a host as a String given the domain level.
        #
        #    # Top-level domain example
        #    extract_subdomain('www.example.com', 1) # => "www"
        #    # Second-level domain example
        #    extract_subdomain('dev.www.example.co.uk', 2) # => "dev.www"
        def extract_subdomain(host, tld_length)
          extract_subdomains(host, tld_length).join(".")
        end

        def url_for(options)
          if options[:only_path]
            path_for options
          else
            full_url_for options
          end
        end

        def full_url_for(options)
          host     = options[:host]
          protocol = options[:protocol]
          port     = options[:port]

          unless host
            raise ArgumentError, "Missing host to link to! Please provide the :host parameter, set default_url_options[:host], or set :only_path to true"
          end

          build_host_url(host, port, protocol, options, path_for(options))
        end

        def path_for(options)
          path = options[:script_name].to_s.chomp("/".freeze)
          path << options[:path] if options.key?(:path)

          add_trailing_slash(path) if options[:trailing_slash]
          add_params(path, options[:params]) if options.key?(:params)
          add_anchor(path, options[:anchor]) if options.key?(:anchor)

          path
        end

        private

        def add_params(path, params)
          params = { params: params } unless params.is_a?(Hash)
          params.reject! { |_, v| v.to_param.nil? }
          query = params.to_query
          path << "?#{query}" unless query.empty?
        end

        def add_anchor(path, anchor)
          if anchor
            path << "##{Journey::Router::Utils.escape_fragment(anchor.to_param)}"
          end
        end

        def extract_domain_from(host, tld_length)
          host.split(".").last(1 + tld_length).join(".")
        end

        def extract_subdomains_from(host, tld_length)
          parts = host.split(".")
          parts[0..-(tld_length + 2)]
        end

        def add_trailing_slash(path)
          if path.include?("?")
            path.sub!(/\?/, '/\&')
          elsif !path.include?(".")
            path.sub!(/[^\/]\z|\A\z/, '\&/')
          end
        end

        def build_host_url(host, port, protocol, options, path)
          if match = host.match(HOST_REGEXP)
            protocol ||= match[1] unless protocol == false
            host       = match[2]
            port       = match[3] unless options.key? :port
          end

          protocol = normalize_protocol protocol
          host     = normalize_host(host, options)

          result = protocol.dup

          if options[:user] && options[:password]
            result << "#{Rack::Utils.escape(options[:user])}:#{Rack::Utils.escape(options[:password])}@"
          end

          result << host
          normalize_port(port, protocol) { |normalized_port|
            result << ":#{normalized_port}"
          }

          result.concat path
        end

        def named_host?(host)
          IP_HOST_REGEXP !~ host
        end

        def normalize_protocol(protocol)
          case protocol
          when nil
            "http://"
          when false, "//"
            "//"
          when PROTOCOL_REGEXP
            "#{$1}://"
          else
            raise ArgumentError, "Invalid :protocol option: #{protocol.inspect}"
          end
        end

        def normalize_host(_host, options)
          return _host unless named_host?(_host)

          tld_length = options[:tld_length] || @@tld_length
          subdomain  = options.fetch :subdomain, true
          domain     = options[:domain]

          host = "".dup
          if subdomain == true
            return _host if domain.nil?

            host << extract_subdomains_from(_host, tld_length).join(".")
          elsif subdomain
            host << subdomain.to_param
          end
          host << "." unless host.empty?
          host << (domain || extract_domain_from(_host, tld_length))
          host
        end

        def normalize_port(port, protocol)
          return unless port

          case protocol
          when "//" then yield port
          when "https://"
            yield port unless port.to_i == 443
          else
            yield port unless port.to_i == 80
          end
        end
      end

      def initialize
        super
        @protocol = nil
        @port     = nil
      end

      # Returns the complete URL used for this request.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com'
      #   req.url # => "http://example.com"
      def url
        protocol + host_with_port + fullpath
      end

      # Returns 'https://' if this is an SSL request and 'http://' otherwise.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com'
      #   req.protocol # => "http://"
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com', 'HTTPS' => 'on'
      #   req.protocol # => "https://"
      def protocol
        @protocol ||= ssl? ? "https://" : "http://"
      end

      # Returns the \host and port for this request, such as "example.com:8080".
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com'
      #   req.raw_host_with_port # => "example.com"
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:80'
      #   req.raw_host_with_port # => "example.com:80"
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.raw_host_with_port # => "example.com:8080"
      def raw_host_with_port
        if forwarded = x_forwarded_host.presence
          forwarded.split(/,\s?/).last
        else
          get_header("HTTP_HOST") || "#{server_name || server_addr}:#{get_header('SERVER_PORT')}"
        end
      end

      # Returns the host for this request, such as "example.com".
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.host # => "example.com"
      def host
        raw_host_with_port.sub(/:\d+$/, "".freeze)
      end

      # Returns a \host:\port string for this request, such as "example.com" or
      # "example.com:8080". Port is only included if it is not a default port
      # (80 or 443)
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com'
      #   req.host_with_port # => "example.com"
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:80'
      #   req.host_with_port # => "example.com"
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.host_with_port # => "example.com:8080"
      def host_with_port
        "#{host}#{port_string}"
      end

      # Returns the port number of this request as an integer.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com'
      #   req.port # => 80
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.port # => 8080
      def port
        @port ||= begin
          if raw_host_with_port =~ /:(\d+)$/
            $1.to_i
          else
            standard_port
          end
        end
      end

      # Returns the standard \port number for this request's protocol.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.standard_port # => 80
      def standard_port
        case protocol
        when "https://" then 443
          else 80
        end
      end

      # Returns whether this request is using the standard port
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:80'
      #   req.standard_port? # => true
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.standard_port? # => false
      def standard_port?
        port == standard_port
      end

      # Returns a number \port suffix like 8080 if the \port number of this request
      # is not the default HTTP \port 80 or HTTPS \port 443.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:80'
      #   req.optional_port # => nil
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.optional_port # => 8080
      def optional_port
        standard_port? ? nil : port
      end

      # Returns a string \port suffix, including colon, like ":8080" if the \port
      # number of this request is not the default HTTP \port 80 or HTTPS \port 443.
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:80'
      #   req.port_string # => ""
      #
      #   req = ActionDispatch::Request.new 'HTTP_HOST' => 'example.com:8080'
      #   req.port_string # => ":8080"
      def port_string
        standard_port? ? "" : ":#{port}"
      end

      # Returns the requested port, such as 8080, based on SERVER_PORT
      #
      #   req = ActionDispatch::Request.new 'SERVER_PORT' => '80'
      #   req.server_port # => 80
      #
      #   req = ActionDispatch::Request.new 'SERVER_PORT' => '8080'
      #   req.server_port # => 8080
      def server_port
        get_header("SERVER_PORT").to_i
      end

      # Returns the \domain part of a \host, such as "rubyonrails.org" in "www.rubyonrails.org". You can specify
      # a different <tt>tld_length</tt>, such as 2 to catch rubyonrails.co.uk in "www.rubyonrails.co.uk".
      def domain(tld_length = @@tld_length)
        ActionDispatch::Http::URL.extract_domain(host, tld_length)
      end

      # Returns all the \subdomains as an array, so <tt>["dev", "www"]</tt> would be
      # returned for "dev.www.rubyonrails.org". You can specify a different <tt>tld_length</tt>,
      # such as 2 to catch <tt>["www"]</tt> instead of <tt>["www", "rubyonrails"]</tt>
      # in "www.rubyonrails.co.uk".
      def subdomains(tld_length = @@tld_length)
        ActionDispatch::Http::URL.extract_subdomains(host, tld_length)
      end

      # Returns all the \subdomains as a string, so <tt>"dev.www"</tt> would be
      # returned for "dev.www.rubyonrails.org". You can specify a different <tt>tld_length</tt>,
      # such as 2 to catch <tt>"www"</tt> instead of <tt>"www.rubyonrails"</tt>
      # in "www.rubyonrails.co.uk".
      def subdomain(tld_length = @@tld_length)
        ActionDispatch::Http::URL.extract_subdomain(host, tld_length)
      end
    end
  end
end