Is there a way to upload files without a file extension suffix to Flask-Dropzone?

[colemaro]

I'm trying to use Flask-Dropzone as part of a web-app to upload files for processing. These files typically don't have a file extension due to a quirk of the export process that generates these files.

I've consulted both the Flask-Dropzone docs and the Dropzone.js docs and both seem to imply that if DROPZONE_ALLOWED_FILE_CUSTOM = False then every upload of all file types should be accepted. However, when navigating the file upload window, the filter defaults to "All Supported Types" and seems to only accept images. I can toggle this to "All Files" but when trying to upload anything else the dropzone gives the default error message about the file not being allowed.

I am able to set custom allowed file types such as .pdf's, .xlsx, etc. However this isn't useful as the files in question doesn't have a declared file type extension.

This can be recreated using the "multiple-dropzones" example and trying to upload any non-image file when the DROPZONE_ALLOWED_FILE_TYPE config is deleted.