potential fix for #2404

app/logical/sources/site.rb

@@ -3,22 +3,22 @@
 module Sources
   class Site
     attr_reader :url, :strategy
-    delegate :get, :get_size, :referer_url, :site_name, :artist_name, 
+    delegate :get, :get_size, :site_name, :artist_name, 
       :profile_url, :image_url, :tags, :artist_record, :unique_id, 
       :page_count, :file_url, :ugoira_frame_data, :image_urls, 
       :has_artist_commentary?, :artist_commentary_title,
-      :artist_commentary_desc, :to => :strategy
+      :artist_commentary_desc, :referer_url, :to => :strategy
 
     def self.strategies
       [Strategies::Pixiv, Strategies::NicoSeiga, Strategies::DeviantArt, Strategies::Nijie, Strategies::Twitter]
     end
 
-    def initialize(url)
+    def initialize(url, options = {})
       @url = url
 
       Site.strategies.each do |strategy|
         if strategy.url_match?(url)
-          @strategy = strategy.new(url)
+          @strategy = strategy.new(url, options[:referer_url])
           break
         end
       end

app/logical/sources/strategies/base.rb

@@ -1,7 +1,7 @@
 module Sources
   module Strategies
     class Base
-      attr_reader :url
+      attr_reader :url, :referer_url
       attr_reader :artist_name, :profile_url, :image_url, :tags, :page_count
       attr_reader :artist_commentary_title, :artist_commentary_desc
 
@@ -9,8 +9,9 @@ module Sources
         false
       end
 
-      def initialize(url)
+      def initialize(url, referer_url)
         @url = url
+        @referer_url = referer_url
         @page_count = 1
       end
 
@@ -69,10 +70,6 @@ module Sources
         end
       end
 
-      def referer_url(template)
-        raise NotImplementedError
-      end
-
       def image_urls
         [image_url]
       end

app/logical/sources/strategies/deviant_art.rb

@@ -5,11 +5,11 @@ module Sources
         url =~ /^https?:\/\/(?:.+?\.)?deviantart\.(?:com|net)/
       end
 
-      def referer_url(template)
-        if template.params[:ref] =~ /deviantart\.com\/art\// && template.params[:url] =~ /https?:\/\/(?:fc|th|pre|orig|img)\d{2}\.deviantart\.net\//
-          template.params[:ref]
+      def referer_url
+        if @referer_url =~ /deviantart\.com\/art\// && @url =~ /https?:\/\/(?:fc|th|pre|orig|img)\d{2}\.deviantart\.net\//
+          @referer_url
         else
-          template.params[:url]
+          @url
         end
       end
 

app/logical/sources/strategies/nico_seiga.rb

@@ -5,11 +5,11 @@ module Sources
         url =~ /^https?:\/\/(?:\w+\.)?nico(?:seiga|video)\.jp/
       end
 
-      def referer_url(template)
-        if template.params[:ref] =~ /seiga\.nicovideo\.jp\/seiga\/im\d+/ && template.params[:url] =~ /http:\/\/lohas\.nicoseiga\.jp\/priv\//
-          template.params[:ref]
+      def referer_url
+        if @referer_url =~ /seiga\.nicovideo\.jp\/seiga\/im\d+/ && @url =~ /http:\/\/lohas\.nicoseiga\.jp\/priv\//
+          @referer_url
         else
-          template.params[:url]
+          @url
         end
       end
 

app/logical/sources/strategies/nijie.rb

@@ -6,10 +6,10 @@ module Sources
       end
 
       def referer_url(template)
-        if template.params[:ref] =~ /nijie\.info\/view\.php.+id=\d+/ && template.params[:url] =~ /pic\d+\.nijie.info\/nijie_picture\//
-          template.params[:ref]
+        if @referer_url =~ /nijie\.info\/view\.php.+id=\d+/ && @url =~ /pic\d+\.nijie.info\/nijie_picture\//
+          @referer_url
         else
-          template.params[:url]
+          @url
         end
       end
 

app/logical/sources/strategies/pixiv.rb

@@ -19,11 +19,11 @@ module Sources
         url =~ /#{WEB}|#{IMG}|#{I12}/i
       end
 
-      def referer_url(template)
-        if template.params[:ref] =~ /pixiv\.net\/member_illust.+mode=medium/ && template.params[:url] =~ /#{IMG}|#{I12}/
-          template.params[:ref]
+      def referer_url
+        if @referer_url =~ /pixiv\.net\/member_illust.+mode=medium/ && @url =~ /#{IMG}|#{I12}/
+          @referer_url
         else
-          template.params[:url]
+          @url
         end
       end
 

app/logical/sources/strategies/twitter.rb

@@ -4,13 +4,13 @@ module Sources::Strategies
       url =~ %r!https?://(?:mobile\.)?twitter\.com/\w+/status/\d+! || url =~ %r{https?://pbs\.twimg\.com/media/}
     end
 
-      def referer_url(template)
-        if template.params[:ref] =~ %r!https?://(?:mobile\.)?twitter\.com/\w+/status/\d+! && template.params[:url] =~ %r{https?://pbs\.twimg\.com/media/}
-          template.params[:ref]
-        else
-          template.params[:url]
-        end
+    def referer_url
+      if @referer_url =~ %r!https?://(?:mobile\.)?twitter\.com/\w+/status/\d+! && @url =~ %r{https?://pbs\.twimg\.com/media/}
+        @referer_url
+      else
+        @url
       end
+    end
 
     def tags
       []