Check Flask upload if user does not selected file
10,904
Solution 1
Now I am using
if request.files['file'].filename == '':
return 'No selected file'
or using file length check
import os
file = request.files['file']
file.seek(0, os.SEEK_END)
if file.tell() == 0:
return 'No selected file'
Solution 2
Try:
if not request.files.get('file', None):
pass
If you want have most control over the files, you can use http://pythonhosted.org/Flask-Uploads/
Author by
Steely Wing
Updated on June 18, 2022Comments
-
Steely Wing almost 2 years
If user doesn't select a file in form (equals PHP UPLOAD_ERR_NO_FILE ),
request.files['file']
also return aFileStorage
object, I am usingrequest.files['file'].filename == ''
to check, any better way ? I have seen Flask Doc but can't find the answer.'file' in request.files
will not work on user doesn't select file, browser also will submit a 0 length and filename equals '' (empty string) part.and how do I detect uploaded file was only partially uploaded error (equals PHP UPLOAD_ERR_PARTIAL) ?