Filter for JAX-RS / EE MVC applications for redirecting unauthenticated users to the login application

ccm-core/src/main/java/org/libreccm/ui/IsAuthenticatedFilter.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (C) 2020 LibreCCM Foundation.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301  USA
+ */
+package org.libreccm.ui;
+
+import org.libreccm.security.Shiro;
+
+import java.io.IOException;
+import java.net.URI;
+
+import javax.inject.Inject;
+import javax.servlet.ServletContext;
+import javax.ws.rs.container.ContainerRequestContext;
+import javax.ws.rs.container.ContainerRequestFilter;
+import javax.ws.rs.container.PreMatching;
+import javax.ws.rs.core.Response;
+
+/**
+ *
+ * @author <a href="mailto:jens.pelzetter@googlemail.com">Jens Pelzetter</a>
+ */
+@PreMatching
+public class IsAuthenticatedFilter implements ContainerRequestFilter {
+
+    @Inject
+    private ServletContext servletContext;
+
+    @Inject
+    private Shiro shiro;
+
+    @Override
+    public void filter(final ContainerRequestContext requestContext)
+        throws IOException {
+        if (!shiro.getSubject().isAuthenticated()) {
+            final String contextPath = servletContext.getContextPath();
+            final String returnUrl = requestContext
+                .getUriInfo()
+                .getRequestUri()
+                .getPath();
+            requestContext.abortWith(
+                Response.temporaryRedirect(
+                    URI.create(
+                        String.format(
+                            "/%s/ccm/register?return_url=%s",
+                            contextPath,
+                            returnUrl
+                        )
+                    )
+                ).build()
+            );
+        }
+    }
+
+}

ccm-core/src/main/java/org/libreccm/ui/admin/AdminApplication.java

@@ -18,8 +18,9 @@
  */
 package org.libreccm.ui.admin;
 
+import org.libreccm.ui.IsAuthenticatedFilter;
 
-
+import java.util.HashSet;
 import java.util.Set;
 import java.util.stream.Collectors;
 
@@ -40,11 +41,19 @@ public class AdminApplication extends Application {
 
     @Override
     public Set<Class<?>> getClasses() {
-        return adminPages
+        final Set<Class<?>> classes = new HashSet<>();
+
+        classes.add(IsAuthenticatedFilter.class);
+        
+        classes.addAll(
+            adminPages
                 .stream()
                 .map(AdminPage::getControllerClasses)
                 .flatMap(controllers -> controllers.stream())
-            .collect(Collectors.toSet());
+                .collect(Collectors.toSet())
+        );
+
+        return classes;
 
 //        final Set<Class<?>> classes = new HashSet<>();
 //        classes.add(SystemInformationController.class);

ccm-core/src/main/java/org/libreccm/ui/admin/systeminformation/SystemInformationController.java

@@ -18,6 +18,10 @@
  */
 package org.libreccm.ui.admin.systeminformation;
 
+import org.libreccm.core.CoreConstants;
+import org.libreccm.security.AuthorizationRequired;
+import org.libreccm.security.RequiresPrivilege;
+
 import javax.enterprise.context.RequestScoped;
 import javax.mvc.Controller;
 import javax.ws.rs.GET;
@@ -34,6 +38,8 @@ public class SystemInformationController {
     
     @GET
     @Path("/")
+    @AuthorizationRequired
+    @RequiresPrivilege(CoreConstants.PRIVILEGE_ADMIN)
     public String getSystemInformation() {
         return "org/libreccm/ui/admin/systeminformation.xhtml";
     }