/* Copyright 2004, 2005, 2006 Acegi Technology Pty Limited

  *

  * Licensed under the Apache License, Version 2.0 (the "License");

  * you may not use this file except in compliance with the License.

  * You may obtain a copy of the License at

  *

  *     http://www.apache.org/licenses/LICENSE-2.0

  *

  * 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.acegisecurity.util;

 import javax.servlet.ServletRequest;

 /**

  * A <code>PortResolver</code> determines the port a web request was received

  * on.

  *

  * <P>

  * This interface is necessary because

  * <code>ServletRequest.getServerPort()</code> may not return the correct port

  * in certain circumstances. For example, if the browser does not construct

  * the URL correctly after a redirect.

  * </p>

  *

  * @author Ben Alex

  * @version $Id: PortResolver.java 1784 2007-02-24 21:00:24Z luke_t $

  */

 public interface PortResolver {

     //~ Methods ========================================================================================================

     /**

      * Indicates the port the <code>ServletRequest</code> was received on.

      *

      * @param request that the method should lookup the port for

      *

      * @return the port the request was received on

      */

     int getServerPort(ServletRequest request);

 }