Flask flask_uploads.UploadNotAllowed error

Question

I am using flask to handle image uploads and whenever I upload a jpg, jpeg, or png the program I made is able to handle the upload. However, whenever uploading a .jfif image the program returns the error flask_uploads.UploadNotAllowed. Thanks for any help in advance!

The code the program is having an issue with is:

file_name = photos.save(request.files['photo'])

full traceback:

Traceback (most recent call last):
  File 

    "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 2464, in __call__
        return self.wsgi_app(environ, start_response)
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 2450, in wsgi_app
        response = self.handle_exception(e)
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 1867, in handle_exception
        reraise(exc_type, exc_value, tb)
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\_compat.py", line 39, in reraise
        raise value
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 2447, in wsgi_app
        response = self.full_dispatch_request()
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 1952, in full_dispatch_request
        rv = self.handle_user_exception(e)
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 1821, in handle_user_exception
        reraise(exc_type, exc_value, tb)
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\_compat.py", line 39, in reraise
        raise value
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 1950, in full_dispatch_request
        rv = self.dispatch_request()
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask\app.py", line 1936, in dispatch_request
        return self.view_functions[rule.endpoint](**req.view_args)
      File "c:\Users\user\Desktop\OCR - Copy\OCRWebsite\app.py", line 421, in upload
        file_name = photos.save(request.files['photo'])
      File "C:\Users\user\AppData\Local\Programs\Python\Python36\lib\site-packages\flask_uploads.py", line 416, in save
        raise UploadNotAllowed()
    flask_uploads.UploadNotAllowed

Answer 1

You are probably using the standard IMAGES set:

https://github.com/jugmac00/flask-reuploaded/blob/f05077b085393dbc607c01b8daff1b3a8b2dbf0b/src/flask_uploads/extensions.py#L29

This set does not allow .jfif files.

However, such a set is really only a Python set, so you can create and use your own, or just update the existing one.

IMAGES.update(".jfif")