#1866: support wikia source redirection

included support for different image servers

app/models/post.rb

@@ -326,7 +326,12 @@ class Post < ActiveRecord::Base
 
       when %r{\Ahttp://(?:(?:s?img|cdn|www)\d?\.)?gelbooru\.com/{1,2}(?:images|samples)/\d+/(?:sample_)?([a-f0-9]{32})\.}i
         "http://gelbooru.com/index.php?page=post&s=list&md5=#{$1}"
-  
+
+      when %r{\Ahttps?://(?:slot\d*\.)?im(?:g|ages)\d*\.wikia\.nocookie\.net/(?:_{2}cb\d{14}/)?([^/]+)/images/(?:(?:thumb|archive)?/)?[a-f0-9]/[a-f0-9]{2}/([^/]+)}i
+        subdomain = $1
+        filename = $2
+        "http://#{subdomain}.wikia.com/wiki/File:#{filename}"
+
       else
         source
       end