How to Handle CORS Errors with 302 Redirects to SSO Login Pages in ReactJS?

CORS Error in ReactJS GET Request with 302 Redirect

You are facing a CORS error when your ReactJS app sends a GET request to your backend server (b.com) that responds with a 302 redirect to a SSO login page (sso.example.com). You lack control over the SSO page's response headers, which means you cannot add the Access-Control-Allow-Origin header to resolve the CORS issue.

Solution:

To circumvent this CORS limitation, it is recommended to handle the redirect on the client side within the browser. This will prevent the CORS issue because you are accessing the SSO page directly from its URL.

JavaScript Solution:

You can use plain JavaScript to redirect your GET request using the window object:

<code class="javascript">window.location.href = "https://www.example.com";</code>

This approach is straightforward and easy to implement, but it may affect your browser history. Alternatively, you can use React's navigation library to handle the redirect programmatically:

<code class="javascript">import { useHistory } from "react-router-dom";

const history = useHistory();

useEffect(() => {
  history.push("https://www.example.com");
}, []);</code>

This method allows you to control the redirect more precisely and avoid any potential issues with browsing history. By processing the redirect on the client side, you eliminate the need to implement CORS headers on the SSO page, which is beyond your control.

The above is the detailed content of How to Handle CORS Errors with 302 Redirects to SSO Login Pages in ReactJS?. For more information, please follow other related articles on the PHP Chinese website!