Axios get access to response header fields

Question

I'm building a frontend app with React and Redux and I'm using axios to perform my requests. I would like to get access to all the fields in the header of the response. In my browser I can inspect the header and I can see that all the fields that I need are present(such as token, uid, etc...), but when I call

const request = axios.post(`${ROOT_URL}/auth/sign_in`, props);
request.then((response)=>{
  console.log(response.headers);
});

I get just

Object {content-type: "application/json; charset=utf-8", cache-control: "max-age=0, private, must-revalidate"}

Here my browser network tab,as you can see all the other fields are present.

Bests.

Answer 1

In case of CORS requests, browsers can only access the following response headers by default:

• Cache-Control
• Content-Language
• Content-Type
• Expires
• Last-Modified
• Pragma

If you would like your client app to be able to access other headers, you need to set the Access-Control-Expose-Headers header on the server:

Access-Control-Expose-Headers: Access-Token, Uid

Answer 2

This really helped me, thanks Nick Uraltsev for your answer.

For those of you using nodejs with cors:

...
const cors = require('cors');

const corsOptions = {
  exposedHeaders: 'Authorization',
};

app.use(cors(corsOptions));
...

In the case you are sending the response in the way of res.header('Authorization', `Bearer ${token}`).send();

Answer 3

I was facing the same problem. Y did this in my "WebSecurity.java", it's about the setExposedHeaders method in the cors configuration.

@Bean
CorsConfigurationSource corsConfigurationSource() {

    CorsConfiguration configuration = new CorsConfiguration();
    configuration.setAllowCredentials(true);
    configuration.setAllowedOrigins(Arrays.asList(FRONT_END_SERVER));
    configuration.setAllowedMethods(Arrays.asList("GET", "POST", "PUT", "DELETE"));
    configuration.setAllowedHeaders(Arrays.asList("X-Requested-With","Origin","Content-Type","Accept","Authorization"));

    // This allow us to expose the headers
    configuration.setExposedHeaders(Arrays.asList("Access-Control-Allow-Headers", "Authorization, x-xsrf-token, Access-Control-Allow-Headers, Origin, Accept, X-Requested-With, " +
            "Content-Type, Access-Control-Request-Method, Access-Control-Request-Headers"));

    UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    source.registerCorsConfiguration("/**", configuration);
    return source;
}

I hope it works.