Why is Flask not downloading a file?

Question

Flask

I'm trying to download a file from my application, but for some reason it doesn't work.

Here is my method

@admin.route('/download_doc', methods=['GET', 'POST'])
def download_doc():
    doc_id = request.json['id']
    doc = Doc.query.filter(Doc.id==doc_id).first()
    filename = doc.filename  
    return send_from_directory(app.config['UPLOAD_FOLDER'], filename, as_attachment=True)

UPLOAD_FOLDER = 'static\doc'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

Writes that the method worked 200. But the download of the file does not start. Help me to understand

Answer 1

Maybe because the backslash?