refactor

app/logical/downloads/rewrite_strategies/moebooru.rb

@@ -0,0 +1,26 @@
+module Downloads
+  module RewriteStrategies
+    class Moebooru < Base
+      DOMAINS = '(?:[^.]+\.)?yande\.re|konachan\.com'
+
+      def rewrite(url, headers)
+        if url =~ %r{https?://(?:#{DOMAINS})}
+          url, headers = rewrite_jpeg_versions(url, headers)
+        end
+
+        return [url, headers]
+      end
+
+    protected
+      def rewrite_jpeg_versions(url, headers)
+        # example: https://yande.re/jpeg/2c6876ac2317fce617e3c5f1a642123b/yande.re%20292092%20hatsune_miku%20tid%20vocaloid.jpg 
+
+        if url =~ %r{\A(https?://(?:#{DOMAINS}))/jpeg/([a-f0-9]+(?:/.*)?)\.jpg\Z}
+          url = $1 + "/image/" + $2 + ".png"
+        end
+
+        return [url, headers]
+      end
+    end
+  end
+end