/*
* Copyright 2002-2008 the original author or authors.
*
* 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.springframework.web.servlet.handler;
import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* Interceptor that checks the authorization of the current user via the
* user's roles, as evaluated by HttpServletRequest's isUserInRole method.
*
* @author Juergen Hoeller
* @since 20.06.2003
* @see javax.servlet.http.HttpServletRequest#isUserInRole
*/
public class UserRoleAuthorizationInterceptor extends HandlerInterceptorAdapter {
private String[] authorizedRoles;
/**
* Set the roles that this interceptor should treat as authorized.
* @param authorizedRoles array of role names
*/
public final void setAuthorizedRoles(String[] authorizedRoles) {
this.authorizedRoles = authorizedRoles;
}
@Override
public final boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws ServletException, IOException {
if (this.authorizedRoles != null) {
for (String role : this.authorizedRoles) {
if (request.isUserInRole(role)) {
return true;
}
}
}
handleNotAuthorized(request, response, handler);
return false;
}
/**
* Handle a request that is not authorized according to this interceptor.
* Default implementation sends HTTP status code 403 ("forbidden").
* <p>This method can be overridden to write a custom message, forward or
* redirect to some error page or login page, or throw a ServletException.
* @param request current HTTP request
* @param response current HTTP response
* @param handler chosen handler to execute, for type and/or instance evaluation
* @throws javax.servlet.ServletException if there is an internal error
* @throws java.io.IOException in case of an I/O error when writing the response
*/
protected void handleNotAuthorized(HttpServletRequest request, HttpServletResponse response, Object handler)
throws ServletException, IOException {
response.sendError(HttpServletResponse.SC_FORBIDDEN);
}
}
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