.NET Core Web API & JWT Token handling in React JS

When working with a .NET Core Web API and React JS, it’s important to handle JWT (JSON Web Token) authentication properly. JWT is a popular method for securing web applications, and when used in conjunction with .NET Core Web API and React JS, it provides a secure way to authenticate and authorize users.

Setting up the .NET Core Web API

First, you’ll need to set up a .NET Core Web API to handle the authentication and provide JWT tokens to the React JS frontend. This involves creating endpoints for user registration, login, and token generation, as well as secure endpoints that require a valid JWT token.

Handling JWT Token in React JS

Once the .NET Core Web API is set up, you’ll need to handle the JWT tokens in your React JS frontend. This typically involves storing the token in the browser’s local storage after a successful login, and including it in the headers of subsequent API requests for authentication.

React JS Authentication

Here’s an example of how you might handle JWT token authentication in a React JS app:

		
			//Login Component
			const handleLogin = async () => {
				const response = await fetch('https://your-api/login', {
					method: 'POST',
					headers: {
						'Content-Type': 'application/json'
					},
					body: JSON.stringify({ username, password })
				});
				const data = await response.json();
				localStorage.setItem('token', data.token);
			}

			//API Request with JWT Token
			const fetchData = async () => {
				const token = localStorage.getItem('token');
				const response = await fetch('https://your-api/secure-endpoint', {
					headers: {
						Authorization: `Bearer ${token}`
					}
				});
				const data = await response.json();
				console.log(data);
			}
		
	

Conclusion

By setting up a .NET Core Web API to generate JWT tokens and handling them properly in a React JS frontend, you can create a secure and reliable authentication system for your web application. This allows you to safely authenticate and authorize users, and ensures that only authorized users can access your application’s resources.