Added a new extension point to expose unprotected root action.

changelog.html

@@ -70,6 +70,8 @@ Upcoming changes</a>
   <li class=bug>
     Fixed a bug in the OpenSUSE startup script
     (<a href="http://issues.jenkins-ci.org/browse/JENKINS-5020">issue 5020</a>)
+  <li class=rfe>
+    Added a new extension point to expose unprotected root action.
 </ul>
 </div><!--=TRUNK-END=-->
 

core/src/main/java/hudson/model/Hudson.java

@@ -3423,6 +3423,14 @@ public final class Hudson extends Node implements ItemGroup<TopLevelItem>, Stapl
             || rest.startsWith("/federatedLoginService/")
             || rest.startsWith("/securityRealm"))
                 return this;    // URLs that are always visible without READ permission
+
+            for (Action a : getActions()) {
+                if (a instanceof UnprotectedRootAction) {
+                    if (rest.startsWith("/"+a.getUrlName()+"/"))
+                        return this;
+                }
+            }
+
             throw e;
         }
         return this;

core/src/main/java/hudson/model/UnprotectedRootAction.java

+/*
+ * The MIT License
+ *
+ * Copyright (c) 2011, CloudBees, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+package hudson.model;
+
+import hudson.ExtensionPoint;
+
+/**
+ * {@link RootAction}s that are accessible to requests that do not have the READ permission on {@link Hudson}.
+ *
+ * @author Kohsuke Kawaguchi
+ * @since 1.398
+ */
+public interface UnprotectedRootAction extends RootAction, ExtensionPoint {
+}