Allow OPTIONS HTTP Method for oauth/token request

Question

I\'m trying to enable oauth2 token fetching for my angular application. My configuration is working fine (authentication is working correctly for all requests, token fetchin

Answer 1

The following works for Spring Boot 2. It does not pick up other CORS configurations otherwise.

@Configuration
@EnableAuthorizationServer
public class OAuth2AuthorizationServerConfig extends AuthorizationServerConfigurerAdapter {

    // this is a Spring ConfigurationProperty use any way to get the CORS values
    @Autowired
    private CorsProperties corsProperties;

    // other things
    //...

    @Override
    public void configure(
            AuthorizationServerEndpointsConfigurer endpoints) {
        endpoints
                .tokenStore(tokenStore())
                .authenticationManager(authenticationManager);
        if (corsProperties.getAllowedOrigins() != null) {
            Map corsConfigMap = new HashMap<>();
            Arrays.asList(corsProperties.getAllowedOrigins().split(",")).stream()
                    .filter(StringUtils::isNotBlank).forEach(s -> {
                CorsConfiguration config = new CorsConfiguration();
                config.setAllowCredentials(true);
                config.addAllowedOrigin(s.trim());
                if (corsProperties.getAllowedMethods() != null) {
                    config.setAllowedMethods(Arrays.asList(corsProperties.getAllowedMethods().split(",")));
                }
                if (corsProperties.getAllowedHeaders() != null) {
                    config.setAllowedHeaders(Arrays.asList(corsProperties.getAllowedHeaders().split(",")));
                }
                // here the /oauth/token is used
                corsConfigMap.put("/oauth/token", config);
            });
            endpoints.getFrameworkEndpointHandlerMapping()
                    .setCorsConfigurations(corsConfigMap);
        }
    }


}

And in addition the already mentioned allowance of the OPTIONS request:

@Order(-1)
@Configuration
public class MyWebSecurity extends WebSecurityConfigurerAdapter {
   @Override
   protected void configure(HttpSecurity http) throws Exception {
       http
          authorizeRequests()
            .antMatchers("/**/oauth/token").permitAll()
            .and().httpBasic().realmName(securityRealm)
            // would throw a 403 otherwise
            .and().csrf().disable()
            // optional, but with a token a sesion is not needed anymore
.sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
   }
}