method

compute_asset_host

Ruby on Rails latest stable (v7.1.3.2) - 0 notes - Class: AssetUrlHelper

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compute_asset_host(source = "", options = {}) public

Pick an asset host for this source. Returns nil if no host is set, the host if no wildcard is set, the host interpolated with the numbers 0-3 if it contains %d (the number is the source hash mod 4), or the value returned from invoking call on an object responding to call (proc or otherwise).

Show source

# File actionview/lib/action_view/helpers/asset_url_helper.rb, line 277
      def compute_asset_host(source = "", options = {})
        request = self.request if respond_to?(:request)
        host = options[:host]
        host ||= config.asset_host if defined? config.asset_host

        if host
          if host.respond_to?(:call)
            arity = host.respond_to?(:arity) ? host.arity : host.method(:call).arity
            args = [source]
            args << request if request && (arity > 1 || arity < 0)
            host = host.call(*args)
          elsif host.include?("%d")
            host = host % (Zlib.crc32(source) % 4)
          end
        end

        host ||= request.base_url if request && options[:protocol] == :request
        return unless host

        if URI_REGEXP.match?(host)
          host
        else
          protocol = options[:protocol] || config.default_asset_host_protocol || (request ? :request : :relative)
          case protocol
          when :relative
            "//#{host}"
          when :request
            "#{request.protocol}#{host}"
          else
            "#{protocol}://#{host}"
          end
        end
      end

compute_asset_host

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