Not redirecting on response 302 which includes a Location location header

I am trying to use the OAuth2 framework on our Angular web application which uses `grpc-web` to communicate with our backend services proxied with Envoy (using oauth2 http filter). The redirect (to the SSO login page) is correctly sent by the SSO server but the `grpcwebclientreadablestream.js` expects the `Content-Type` response header to have one of the allowed values (`application/grpc-web-text`, `application/grpc`).

I see the error `'Unknown Content-type received.'` in the console but I also see the expected HTTP requests but they are not reflected on the browser. They are just background AJAX requests.

`POST gRPC Request` => `GET HTTP Auth Request` => `GET HTTP Auth HTML Page`

Could a browser [redirection](https://www.contentkingapp.com/academy/redirects/#the-most-common-redirect-status-codes-are) take place?

`document.location.href = response.headers["Location"]`

Is there a way to achieve this? I tried Interceptors but it seems that the failure on the `Content-Type` fails the promise altogether even if you have implemented `then`, `catch`, `finally`.

So the only solution I have in mind is to somehow override the events handler in `grpcwebclientreadablestream.js` :

```
events.listen(this.xhr_, EventType.READY_STATE_CHANGE, function(e) {
// check if there is a redirection and change the document.location.href
```

Is there another way or an elegant way to override this (`events.listen(this.xhr_, EventType.READY_STATE_CHANGE, function(e)`)?