Allow digest classes as the digest for store path

Author: nobu

lib/cgi/session.rb

@@ -218,8 +218,11 @@ def new_store_file(option={}) # :nodoc:
       prefix = option['prefix']
       suffix = option['suffix']
       algorithm = option['digest'] || 'SHA256'
-      require 'digest'
-      digest = Digest(algorithm).hexdigest(session_id)[0,16]
+      if String === algorithm
+        require 'digest'
+        algorithm = Digest(algorithm)
+      end
+      digest = algorithm.hexdigest(session_id)[0,16]
       path = dir+"/"
       path << prefix if prefix
       path << digest

test/cgi/test_cgi_session.rb

@@ -175,6 +175,11 @@ def test_cgi_session_filestore_digest
     assert_equal path_default, session_file_store_path("tmpdir"=>@session_dir, "session_id"=>session_id)
     path_sha512 = session_file_store_path("tmpdir"=>@session_dir, "session_id"=>session_id, "digest"=>"SHA512")
     assert_not_equal path_sha512, path_default
+
+    path = session_file_store_path("tmpdir"=>@session_dir, "session_id"=>session_id, "digest"=>Digest::SHA256)
+    assert_equal path_default, path
+    path = assert_session_filestore_path(session_file_store_path("tmpdir"=>@session_dir, "session_id"=>session_id, "digest"=>Digest::SHA512))
+    assert_equal path_sha512, path
   end
 
   private