Unlocking the Secrets of Cookies and CORS: A Comprehensive Guide to Configuring Your Spring Boot Backend and React Frontend on Different Subdomains

The Solution: Configuring Cookies and CORS for Spring Boot and React

Fear not, dear developer! We’ve got a solution for you. Let’s dive into the world of cookies and CORS configuration for your Spring Boot backend and React frontend on different subdomains.

Step 1: Understanding Cookie Configuration

In your Spring Boot application, you need to configure cookies to be shared across subdomains. You can do this by adding the following code to your `application.properties` file:

server.servlet.session.cookie.domain=example.com
server.servlet.session.cookie.path=/

This sets the cookie domain to `example.com` and the path to `/`, allowing cookies to be shared across all subdomains.

Step 2: Enabling CORS in Spring Boot

To enable CORS in your Spring Boot application, you need to add the following code to your `WebSecurityConfig` class:

@Configuration
@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
 
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.cors().and().csrf().disable();
    }
 
    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Collections.singletonList("*"));
        configuration.setAllowedMethods(Collections.singletonList("*"));
        configuration.setAllowedHeaders(Collections.singletonList("*"));
        configuration.setExposedHeaders(Collections.singletonList("Location"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}

This code enables CORS for all origins, methods, and headers, allowing cross-origin requests to your Spring Boot backend.

Step 3: Configuring Axios in React

In your React frontend, you need to configure Axios to send credentials (cookies) with each request. You can do this by adding the following code to your Axios instance:

import axios from 'axios';

axios.create({
  withCredentials: true,
  baseURL: 'https://api.example.com'
});

This sets `withCredentials` to `true`, allowing Axios to send cookies with each request to your Spring Boot backend.

Step 4: Setting up CORS in React

To enable CORS in your React frontend, you need to add the following code to your `index.js` file:

import { BrowserRouter } from 'react-router-dom';

const corsProxy = 'https://cors-anywhere.herokuapp.com/';
const apiProxy = 'https://api.example.com';

axios.defaults.baseURL = corsProxy + apiProxy;

This sets up a CORS proxy using `cors-anywhere.herokuapp.com`, allowing your React frontend to make cross-origin requests to your Spring Boot backend.

Cookie and CORS Configuration Checklist

To ensure that your cookies and CORS are properly configured, follow this checklist:

By following these steps and checking off each item on this list, you’ll ensure that your cookies and CORS are properly configured for your Spring Boot backend and React frontend on different subdomains.

Conclusion

Configuring cookies and CORS can be a daunting task, but with this guide, you’ll be well on your way to securing your Spring Boot backend and React frontend on different subdomains. Remember to follow the checklist and take your time configuring each step. Happy coding!

Keywords: Spring Boot, React, cookies, CORS, subdomains, configuration, authentication, authorization, session management, cross-origin requests.

Frequently Asked Question

Got stuck while configuring cookies and CORS for your Spring Boot backend and React frontend on different subdomains? Worry not, we’ve got you covered! Here are the top 5 FAQs to help you overcome this hurdle: