Forced Guest access for client URLs

Several fixes for Guest access in the web-client

git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@2179 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261

source/java/org/alfresco/web/app/servlet/ServletHelper.java

@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2005 Alfresco, Inc.
+ *
+ * Licensed under the Mozilla Public License version 1.1 
+ * with a permitted attribution clause. You may obtain a
+ * copy of the License at
+ *
+ *   http://www.alfresco.org/legal/license.txt
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
+ * either express or implied. See the License for the specific
+ * language governing permissions and limitations under the
+ * License.
+ */
+package org.alfresco.web.app.servlet;
+
+import javax.servlet.ServletContext;
+
+import org.alfresco.service.ServiceRegistry;
+import org.springframework.web.context.WebApplicationContext;
+import org.springframework.web.context.support.WebApplicationContextUtils;
+
+/**
+ * Useful constant values and common methods for Alfresco servlets.
+ * 
+ * @author Kevin Roast
+ */
+public final class ServletHelper
+{
+   /** an existing Ticket can be passed to most servlet for non-session based authentication */
+   public static final String ARG_TICKET   = "ticket";
+   
+   /** forcing guess access is available on most servlets */
+   public static final String ARG_GUEST    = "guest";
+   
+   /** public service bean IDs **/
+   public static final String AUTHENTICATION_SERVICE = "authenticationService";
+   public static final String PERSON_SERVICE = "personService";
+   
+   /**
+    * Return the ServiceRegistry helper instance
+    * 
+    * @param sc      ServletContext
+    * 
+    * @return ServiceRegistry
+    */
+   public static ServiceRegistry getServiceRegistry(ServletContext sc)
+   {
+      WebApplicationContext wc = WebApplicationContextUtils.getRequiredWebApplicationContext(sc);
+      return (ServiceRegistry)wc.getBean(ServiceRegistry.SERVICE_REGISTRY);
+   }
+   
+   /**
+    * Private constructor
+    */
+   private ServletHelper()
+   {
+   }
+}