Hint for positioning file pointer correctly before calling send_file().

Signed-off-by: Armin Ronacher <armin.ronacher@active-4.com>
14 years ago · 858806da69
1 changed files with 3 additions and 1 deletions
--- a/flask/helpers.py
+++ b/flask/helpers.py
@ -287,7 +287,9 @@ def send_file(filename_or_fp, mimetype=None, as_attachment=False,
                           relative path is specified.
                           Alternatively a file object might be provided
                           in which case `X-Sendfile` might not work and
-                           fall back to the traditional method.
+                           fall back to the traditional method.  Make sure
+                           that the file pointer is positioned at the start
+                           of data to send before calling :func:`send_file`.
    :param mimetype: the mimetype of the file if provided, otherwise
                     auto detection happens.
    :param as_attachment: set to `True` if you want to send this file with