[fix][proxy] Move status endpoint out of auth coverage (apache#21428)

(cherry picked from commit fe2d61d)

pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/ProxyServiceStarter.java

@@ -253,9 +253,11 @@ public static void addWebServerHandlers(WebServer server,
                                      ProxyConfiguration config,
                                      ProxyService service,
                                      BrokerDiscoveryProvider discoveryProvider) throws Exception {
+        // We can make 'status.html' publicly accessible without authentication since
+        // it does not contain any sensitive data.
+        server.addRestResource("/", VipStatus.ATTRIBUTE_STATUS_FILE_PATH, config.getStatusFilePath(),
+                VipStatus.class, false);
         if (config.isEnableProxyStatsEndpoints()) {
-            server.addRestResource("/", VipStatus.ATTRIBUTE_STATUS_FILE_PATH, config.getStatusFilePath(),
-                    VipStatus.class);
             server.addRestResource("/proxy-stats", ProxyStats.ATTRIBUTE_PULSAR_PROXY_NAME, service,
                     ProxyStats.class);
             if (service != null) {

pulsar-proxy/src/main/java/org/apache/pulsar/proxy/server/WebServer.java

@@ -239,15 +239,40 @@ private static void popularServletParams(ServletHolder servletHolder, ProxyConfi
         }
     }
 
+    /**
+     * Add a REST resource to the servlet context with authentication coverage.
+     *
+     * @see WebServer#addRestResource(String, String, Object, Class, boolean)
+     *
+     * @param basePath             The base path for the resource.
+     * @param attribute            An attribute associated with the resource.
+     * @param attributeValue       The value of the attribute.
+     * @param resourceClass        The class representing the resource.
+     */
     public void addRestResource(String basePath, String attribute, Object attributeValue, Class<?> resourceClass) {
+        addRestResource(basePath, attribute, attributeValue, resourceClass, true);
+    }
+
+    /**
+     * Add a REST resource to the servlet context.
+     *
+     * @param basePath             The base path for the resource.
+     * @param attribute            An attribute associated with the resource.
+     * @param attributeValue       The value of the attribute.
+     * @param resourceClass        The class representing the resource.
+     * @param requireAuthentication A boolean indicating whether authentication is required for this resource.
+     */
+    public void addRestResource(String basePath, String attribute, Object attributeValue,
+                                Class<?> resourceClass, boolean requireAuthentication) {
         ResourceConfig config = new ResourceConfig();
         config.register(resourceClass);
         config.register(JsonMapperProvider.class);
         ServletHolder servletHolder = new ServletHolder(new ServletContainer(config));
         servletHolder.setAsyncSupported(true);
         // This method has not historically checked for existing paths, so we don't check here either. The
         // method call is added to reduce code duplication.
-        addServlet(basePath, servletHolder, Collections.singletonList(Pair.of(attribute, attributeValue)), true, false);
+        addServlet(basePath, servletHolder, Collections.singletonList(Pair.of(attribute, attributeValue)),
+                requireAuthentication, false);
     }
 
     public int getExternalServicePort() {

pulsar-proxy/src/test/java/org/apache/pulsar/proxy/server/ProxyWithJwtAuthorizationTest.java

@@ -116,6 +116,7 @@ protected void setup() throws Exception {
         proxyConfig.setBrokerClientAuthenticationPlugin(AuthenticationToken.class.getName());
         proxyConfig.setBrokerClientAuthenticationParameters(PROXY_TOKEN);
         proxyConfig.setAuthenticationProviders(providers);
+        proxyConfig.setStatusFilePath("./src/test/resources/vip_status.html");
 
         AuthenticationService authService =
                 new AuthenticationService(PulsarConfigurationLoader.convertFrom(proxyConfig));
@@ -405,6 +406,29 @@ public void testProxyAuthorizationWithPrefixSubscriptionAuthMode() throws Except
         log.info("-- Exiting {} test --", methodName);
     }
 
+    @Test
+    void testGetStatus() throws Exception {
+        log.info("-- Starting {} test --", methodName);
+        final PulsarResources resource = new PulsarResources(new ZKMetadataStore(mockZooKeeper),
+                new ZKMetadataStore(mockZooKeeperGlobal));
+        final AuthenticationService authService = new AuthenticationService(
+                PulsarConfigurationLoader.convertFrom(proxyConfig));
+        final WebServer webServer = new WebServer(proxyConfig, authService);
+        ProxyServiceStarter.addWebServerHandlers(webServer, proxyConfig, proxyService,
+                new BrokerDiscoveryProvider(proxyConfig, resource));
+        webServer.start();
+        @Cleanup
+        final Client client = javax.ws.rs.client.ClientBuilder
+                .newClient(new ClientConfig().register(LoggingFeature.class));
+        try {
+            final Response r = client.target(webServer.getServiceUri()).path("/status.html").request().get();
+            Assert.assertEquals(r.getStatus(), Response.Status.OK.getStatusCode());
+        } finally {
+            webServer.stop();
+        }
+        log.info("-- Exiting {} test --", methodName);
+    }
+
     @Test
     void testGetMetrics() throws Exception {
         log.info("-- Starting {} test --", methodName);