How to display information that came from the front-end in Flask's back-end?

Question

Flask

Good afternoon, I created an Ajax request to the server with information. So, this information comes, but I need to accept it on the server and, let's say, output it somewhere, how is it done in Flask? Maybe there will be examples?

Answer 1

First, you should check what is being formed in $data, there is most likely heresy. And in general it is not clear why such body movements, if you can simply:

$('#log-form').submit(function(event) {
    event.preventDefault();
    $.post($(this).attr('action'), $(this).serialize(), function(result) {
        // Обрабатываете ответ от бэкенда как вам угодно
    });
});

Secondly

from flask import jsonify
from flask import request

@app.route('/', methods=['POST'])
def form_handler():
      if request.form.get('login') == 'admin':
          if request.form.get('pass') == 'qwerty':
              return jsonify({'type': 'success', 'msg': 'Привет, Админ!'})
      return jsonify({'type': 'error', 'msg': 'Неправильное имя пользователя или пароль'})