Rest call error from React.js to node backend

Question

the code below performs a rest call from a react.js frontend a backend node.js but when I execute the rest call I see on the backend Error: Illegal argument undefined, to remedy this I tried to make a rest call in postman and everything works correctly where is the error?

Frontend React.js:

import axios from 'axios';
import server from "../../../config/config";
import qs from 'qs';

 restlogin(email,password){ 
   
    const data = { 'Email': email,'Password': password };
     const options = {
        method: 'POST',
        headers: { 'content-type': 'application/json' },
        data: qs.stringify(data),
        url: "http://172.16.53.248:8989/login"
    }
      axios(options);
  }

Backend Node.js

app.post("/login", async function(request, response) {

    var ret = false;
    try {
        //var data = request.body;
        var data = request.body;
        console.log("\n Email: "+data.Email+"\n Password: "+data.Password);

        ret = await UserController.Login(
            data.Email,
            data.Password
        );
    } catch (err) {
        ManageError.SendError("Errore in login: " + err);
        ret = false;
    }
    response.setHeader("Content-Type", "application/json");
    response.send(
        JSON.stringify({
            return: ret
        })
    );
});

this : ret = await UserController.Login( data.Email, data.Password ); — riki
– riki, Commented Oct 22, 2020 at 14:09

Apps Maven · Accepted Answer · 2020-11-04 04:25:42Z

Frontend React.js:

import axios from 'axios';
import server from "../../../config/config";
import qs from 'qs';


 restlogin(email,password){ 



const data = { 'Email': email,'Password': password };
 const options = {
    method: 'POST',
    headers: { 'content-type': 'application/json' },
    data: JSON.stringify(data),
    url: "http://172.16.53.248:8989/login"
}
  axios(options);


 }

Backend Node.js

  app.post("/login", async function(request, response) {

var ret = false;
try {
    var data = JSON.parse(request.body);
    console.log("\n Email: "+data.Email+"\n Password: "+data.Password);

    ret = await UserController.Login(
        data.Email,
        data.Password
    );
} catch (err) {
    ManageError.SendError("Errore in login: " + err);
    ret = false;
}
response.setHeader("Content-Type", "application/json");
response.send(
    JSON.stringify({
        return: ret
    })
);
});

alpha-bird · Accepted Answer · 2020-10-22 16:53:42Z

0

Have you implemented json-parser on your backend? If not, you need to implement json-parser on backend to receive request which contain JSON body.

answered Oct 22, 2020 at 16:53

alpha-bird

3462 silver badges11 bronze badges

Comments

Raul.F · Accepted Answer · 2020-10-22 17:41:57Z

0

I see a couple of problems here.

You're passing to the data property the following "qs.stringify(data)" which is a string and the result is something like this: Email=test%40pmail.com&Password=my%20passwd

Said that, request.body in you backend is an empty object {} and you will never get these values with this implementation

The reason why with Postman client works is ( I think ) you're passing a JSON object in the body of that your request, but in your React app you're passing a string.

Check is the 'qs.stringify' method is what you really want to use for your implementation.

edited Oct 22, 2020 at 17:41

answered Oct 22, 2020 at 14:57

Raul.F

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