Uploading files with 'umlauts' in filename not working
Author: p4sICreated Oct 31, 2023Updated Sep 7, 2026
LabelsBUGdo-not-reap
Thumbor request URL
example.com/images
Expected behaviour
Image with the name "grün.png" can be uploaded
Actual behaviour
Thumbor throws an exception:
2023-10-31 15:58:37 thumbor:ERROR ERROR: Traceback (most recent call last):
File "/usr/local/lib/python3.11/site-packages/tornado/web.py", line 1788, in _execute
self.finish()
File "/usr/local/lib/python3.11/site-packages/tornado/web.py", line 1234, in finish
future = self.flush(include_footers=True)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/tornado/web.py", line 1171, in flush
return self.request.connection.write_headers(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.11/site-packages/tornado/http1connection.py", line 454, in write_headers
lines.extend(line.encode("latin1") for line in header_lines)
File "/usr/local/lib/python3.11/site-packages/tornado/http1connection.py", line 454, in <genexpr>
lines.extend(line.encode("latin1") for line in header_lines)
^^^^^^^^^^^^^^^^^^^^^
UnicodeEncodeError: 'latin-1' codec can't encode character '\u0308' in position 53: ordinal not in range(256)
2023-10-31 15:58:37 tornado.general:ERROR Cannot send error response after headers writtenOperating system
Thumbor is running in Docker using https://github.com/MinimalCompact/thumbor version 7.6.0
Your thumbor.conf
default
Source: thumbor/thumbor