Implementing authentication and authorization using Zuul Proxy, Oauth2 on REST Microservices

Question

I am trying to implement the above architecture in the workflow with Spring Boot.

• Web client makes a request to Resource Server (Microservices Endpoints)

Answer 1

I am not sure whether you were able to resolve this, I can see this is not answered yet, but there is a way you can pass all information from JWT to all downstream microservices. Write your own ZuulAuthenticationFilter, and then create below method

private void addClaimHeaders(RequestContext context, String token) {
    
    try {
        
        Map claims = jwtTokenVerifier.getAllClaims(token);
        claims.forEach((key, claim) -> {
            
            context.addZuulRequestHeader("x-user-info-"+key, String.valueOf(claim.as(Object.class)));
        });
        
    }catch(Exception ex) {
        
        log.error("Error in setting zuul header : "+ex.getMessage(), ex);
    }
}

this way, you will get information from JWT in headers in each microservice, headers that starts with "x-user-info-" will have your JWT details