Fixed send_from_directory not rebasing to the root path. This fixes #921

CHANGES

@@ -18,6 +18,8 @@ Version 0.10.2
   the test client when absolute URLs were requested.
 - Made `@before_first_request` into a decorator as intended.
 - Fixed an etags bug when sending a file streams with a name.
+- Fixed `send_from_directory` not expanding to the application root path
+  correctly.
 
 Version 0.10.1
 --------------

flask/helpers.py

@@ -615,6 +615,8 @@ def send_from_directory(directory, filename, **options):
                     forwarded to :func:`send_file`.
     """
     filename = safe_join(directory, filename)
+    if not os.path.isabs(filename):
+        filename = os.path.join(current_app.root_path, filename)
     if not os.path.isfile(filename):
         raise NotFound()
     options.setdefault('conditional', True)