My problem is that I'm sending a Blob to the server with FormData, but the server isn't getting it. Code looks like the following:

Flask server code:

@app.route('/save-record', methods=['POST'])

def save_record():

    app.logger.debug(request.form.keys()) #Shows only the title key, not the file key

Client JS Code:

var save = function() {

    var form = new FormData();

    form.append('file', record.blob, record.filename);

    form.append('title', searchedObj.title);

    //Chrome inspector shows that the post data includes a file and a title.                                                                                                                                           

    $.ajax({

      type: 'POST',

      url: '/save-record',

      data: form,

      cache: false,

      processData: false,

      contentType: false

    }).done(function(data) {

      console.log(data);

    });