Flask and Ajax Post requests 400

Question

I am writing a small flask based site and I would like to send data from the client to the server using Ajax. Until now I have only used Ajax requests to retrieve data from

Answer 1

Can you try like this

var request = $.ajax({
    url: "/json_submit",
    type: "POST",
    contentType: "application/json",
    data: JSON.stringify({
      id: id, 
      known: is_known
    }),  
    dataType: "json",
  })  
   .done( function (request) {
 })

Before that, In your code returns dict object. That is not correct. It returns json like

@app.route("/json_submit", methods=["POST"])
def submit_handler():
    # a = request.get_json(force=True)
    app.logger.log("json_submit")
    return flask.jsonify({'msg': 'success'})