normalize nijie popup urls (fixes #3153)

app/logical/sources/strategies/nijie.rb

@@ -5,6 +5,10 @@ module Sources
         url =~ /^https?:\/\/(?:.+?\.)?nijie\.info/
       end
 
+      def initialize(url, referer_url=nil)
+        super(normalize_url(url), normalize_url(referer_url))
+      end
+
       def referer_url
         if @referer_url =~ /nijie\.info\/view\.php.+id=\d+/ && @url =~ /pic\d+\.nijie.info\/nijie_picture\//
           @referer_url
@@ -23,13 +27,13 @@ module Sources
       end
 
       def get
-        page = agent.get(url)
+        page = agent.get(referer_url)
 
         if page.search("div#header-login-container").any?
           # Session cache is invalid, clear it and log in normally.
           Cache.delete("nijie-session")
           @agent = nil
-          page = agent.get(url)
+          page = agent.get(referer_url)
         end
 
         @artist_name, @profile_url = get_profile_from_page(page)
@@ -79,6 +83,14 @@ module Sources
         end
       end
 
+      def normalize_url(url)
+        if url =~ %r!https?://nijie\.info/view_popup\.php.+id=(\d+)!
+          return "http://nijie.info/view.php?id=#{$1}"
+        else
+          return url
+        end
+      end
+
       def agent
         @agent ||= begin
           mech = Mechanize.new