mtien-apache commented on a change in pull request #4593:
URL: https://github.com/apache/nifi/pull/4593#discussion_r504375038



##########
File path: 
nifi-nar-bundles/nifi-framework-bundle/nifi-framework/nifi-web/nifi-web-api/src/main/java/org/apache/nifi/web/api/AccessResource.java
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@@ -329,24 +359,221 @@ public Response oidcExchange(@Context HttpServletRequest 
httpServletRequest, @Co
     )
     public void oidcLogout(@Context HttpServletRequest httpServletRequest, 
@Context HttpServletResponse httpServletResponse) throws Exception {
         if (!httpServletRequest.isSecure()) {
-            throw new IllegalStateException("User authentication/authorization 
is only supported when running over HTTPS.");
+            throw new IllegalStateException(AUTHENTICATION_NOT_ENABLED_MSG);
         }
 
         if (!oidcService.isOidcEnabled()) {
-            throw new IllegalStateException("OpenId Connect is not 
configured.");
+            throw new 
IllegalStateException(OPEN_ID_CONNECT_SUPPORT_IS_NOT_CONFIGURED_MSG);
         }
 
-        URI endSessionEndpoint = oidcService.getEndSessionEndpoint();
-        String postLogoutRedirectUri = generateResourceUri("..", "nifi", 
"logout-complete");
+        // Get the oidc discovery url
+        String oidcDiscoveryUrl = properties.getOidcDiscoveryUrl();
+
+        // Determine the logout method
+        String logoutMethod = determineLogoutMethod(oidcDiscoveryUrl);
+
+        switch (logoutMethod) {
+            case REVOKE_ACCESS_TOKEN_LOGOUT:

Review comment:
       Correct. Both `REVOKE_ACCESS_TOKEN_LOGOUT` and `ID_TOKEN_LOGOUT` make 
the same request to the ID Provider. But each will use a different component of 
the response, which will be determined in 'oidc/logoutCallback`.




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