# HG changeset patch
# User Benjamin Peterson <benjamin@python.org>
# Date 1402796189 25200
# Node ID b4bab078876811c7d95231d08aa6fa7142fdda66
# Parent  bb8b0c7fefd0c5ed99b3f336178a4f9554a1d0ef
url unquote the path before checking if it refers to a CGI script (closes #21766)

diff --git a/Lib/CGIHTTPServer.py b/Lib/CGIHTTPServer.py
--- a/Lib/CGIHTTPServer.py
+++ b/Lib/CGIHTTPServer.py
@@ -84,7 +84,7 @@ class CGIHTTPRequestHandler(SimpleHTTPSe
         path begins with one of the strings in self.cgi_directories
         (and the next character is a '/' or the end of the string).
         """
-        collapsed_path = _url_collapse_path(self.path)
+        collapsed_path = _url_collapse_path(urllib.unquote(self.path))
         dir_sep = collapsed_path.find('/', 1)
         head, tail = collapsed_path[:dir_sep], collapsed_path[dir_sep+1:]
         if head in self.cgi_directories:
diff --git a/Lib/test/test_httpservers.py b/Lib/test/test_httpservers.py
--- a/Lib/test/test_httpservers.py
+++ b/Lib/test/test_httpservers.py
@@ -510,6 +510,11 @@ class CGIHTTPServerTestCase(BaseTestCase
                 (res.read(), res.getheader('Content-type'), res.status))
         self.assertEqual(os.environ['SERVER_SOFTWARE'], signature)
 
+    def test_urlquote_decoding_in_cgi_check(self):
+        res = self.request('/cgi-bin%2ffile1.py')
+        self.assertEqual((b'Hello World\n', 'text/html', 200),
+                (res.read(), res.getheader('Content-type'), res.status))
+
 
 class SimpleHTTPRequestHandlerTestCase(unittest.TestCase):
     """ Test url parsing """