How to upload a file using an ajax call in flask

Question

Hi I\'m quite new to flask and I want to upload a file using an ajax call to the server. As mentioned in the documentation, I added a file upload to the html as folows:

Answer 1

    in the  Javascript side::::        

    var form_data = new FormData();
    form_data.append('file', $('#uploadfile').prop('files')[0]);

    $(function() {
    $.ajax({
        type: 'POST',
        url:  '/uploadLabel',
        data: form_data,
        contentType: false,
        cache: false,
        processData: false,
        success: function(data) {
            console.log('Success!');
        },
    });



in the server side::::


@app.route('/uploadLabel',methods=[ "GET",'POST'])
def uploadLabel():
    isthisFile=request.files.get('file')
    print(isthisFile)
    print(isthisFile.filename)
    isthisFile.save("./"+isthisFile.filename)