View Javadoc

    1   package org.apache.turbine.modules.actions;
    2
    3   /*
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
    10   * with the License.  You may obtain a copy of the License at
    11   *
    12   *   http://www.apache.org/licenses/LICENSE-2.0
    13   *
    14   * Unless required by applicable law or agreed to in writing,
    15   * software distributed under the License is distributed on an
    16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    17   * KIND, either express or implied.  See the License for the
    18   * specific language governing permissions and limitations
    19   * under the License.
    20   */
    21
    22  import org.apache.commons.logging.Log;
    23  import org.apache.commons.logging.LogFactory;
    24  import org.apache.fulcrum.security.acl.AccessControlList;
    25  import org.apache.fulcrum.security.util.FulcrumSecurityException;
    26  import org.apache.turbine.Turbine;
    27  import org.apache.turbine.TurbineConstants;
    28  import org.apache.turbine.annotation.TurbineService;
    29  import org.apache.turbine.modules.Action;
    30  import org.apache.turbine.om.security.User;
    31  import org.apache.turbine.pipeline.PipelineData;
    32  import org.apache.turbine.services.security.SecurityService;
    33  import org.apache.turbine.util.RunData;
    34
    35  /**
    36   * This action doPerforms an Access Control List and places it into
    37   * the RunData object, so it is easily available to modules.  The ACL
    38   * is also placed into the session.  Modules can null out the ACL to
    39   * force it to be rebuilt based on more information.
    40   *
    41   * <p>
    42   *
    43   * Turbine uses a User-Role-Permission arrangement for access control.
    44   * Users are assigned Roles.  Roles are assigned Permissions.  Turbine
    45   * modules then check the Permission required for an action or
    46   * information with the set of Permissions currently associated with
    47   * the session (which are dependent on the user associated with the
    48   * session.)
    49   *
    50   * <p>
    51   *
    52   * The criteria for assigning Roles/Permissions is application
    53   * dependent, in some cases an application may change a User's Roles
    54   * during the session.  To achieve flexibility, the ACL takes an
    55   * Object parameter, which the application can use to doPerform the
    56   * ACL.
    57   *
    58   * <p>
    59   *
    60   * This action is special in that it should only be executed by the
    61   * Turbine servlet.
    62   *
    63   * @author <a href="mailto:john.mcnally@clearink.com">John D. McNally</a>
    64   * @author <a href="mailto:bmclaugh@algx.net">Brett McLaughlin</a>
    65   * @author <a href="quintonm@bellsouth.net">Quinton McCombs</a>
    66   * @author <a href="mailto:peter@courcoux.biz">Peter Courcoux</a>
    67   * @version $Id: AccessController.java 1706239 2015-10-01 13:18:35Z tv $
    68   */
    69  public class AccessController
    70          extends Action
    71  {
    72
    73      /** Logging */
    74      private static Log log = LogFactory.getLog(AccessController.class);
    75
    76      /** Injected service instance */
    77      @TurbineService
    78      private SecurityService security;
    79
    80      /**
    81       * If there is a user and the user is logged in, doPerform will
    82       * set the RunData ACL.  The list is first sought from the current
    83       * session, otherwise it is loaded through
    84       * <code>TurbineSecurity.getACL()</code> and added to the current
    85       * session.
    86       *
    87       * @param pipelineData Turbine information.
    88       * @exception FulcrumSecurityException problem with the security service.
    89       */
    90      @Override
    91      public void doPerform(PipelineData pipelineData)
    92      	throws FulcrumSecurityException
    93      {
    94          RunData data = getRunData(pipelineData);
    95          User user = data.getUser();
    96
    97          if (!security.isAnonymousUser(user)
    98              && user.hasLoggedIn())
    99          {
    100             log.debug("Fetching ACL for " + user.getName());
    101             AccessControlList acl = (AccessControlList)
    102                     data.getSession().getAttribute(
    103                             TurbineConstants.ACL_SESSION_KEY);
    104             if (acl == null)
    105             {
    106                 log.debug("No ACL found in Session, building fresh ACL");
    107                 acl = security.getACL(user);
    108                 data.getSession().setAttribute(
    109                         TurbineConstants.ACL_SESSION_KEY, acl);
    110
    111                 log.debug("ACL is " + acl);
    112             }
    113             data.setACL(acl);
    114         }
    115
    116         // Comply with Turbine 4.0 standards
    117         pipelineData.get(Turbine.class).put(AccessControlList.class, data.getACL());
    118     }
    119 }