Why does it give a 404 error when requesting data?

Question

Flask

I'm requesting data from the server, but it gives a 404 error, what's the problem?
Flask:

@app.route('/test', methods=['POST'])
def testing():
    test = ['hi']
    return jsonify(test)

Getting data on page load:

componentDidMount(){
    this.props.getTest('/test')
  }

The dispatch argument in the connection:

getTest: url =>{
      dispatch(test(url))
    }

Action:

export function testSuccsess(testFiles){
  return {
    type: 'PERSONS_FETCH_DATA_SUCCESS',
    testFiles
  }
}

export function test(url){
  return (dispatch)=>{
    fetch(url)
      .then(response =>{
        if(!response.ok){
          console.log(response)
          throw new Error(response.statusText)
        }
        return response;
      })
      .then(response=> response.json())
      .then(testFiles => dispatch(testSuccsess(testFiles)))
  }
}

The reducer that is thrown into the combine reducers:

export default function testing(state = [], action){
  switch (action.type) {
    case 'PERSONS_FETCH_DATA_SUCCESS':
      return action
      break;
    default:
      return state;
  }
}

Answer 1

As far as I understand, you created a route in Flask with the POST method
. And you send the request in React with the usual GET, which is why you get 404.
https://stackoverflow.com/questions/38510640/how-t...

Answer 2

Can an action be asynchronous? Also for your when the server and front should be running on the same domain and the same port