org.tynamo.security.ShiroExceptionHandler.java Source code

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Here is the source code for org.tynamo.security.ShiroExceptionHandler.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.tynamo.security;

import org.apache.shiro.ShiroException;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.StringUtils;
import org.apache.shiro.web.util.WebUtils;
import org.apache.tapestry5.services.ComponentSource;
import org.apache.tapestry5.services.ResponseRenderer;
import org.apache.tapestry5.runtime.Component;
import org.apache.tapestry5.services.ExceptionReporter;
import org.apache.tapestry5.services.RequestGlobals;
import org.apache.tapestry5.services.Response;
import org.tynamo.security.services.PageService;
import org.tynamo.security.services.SecurityService;

import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * Handler for ShiroException
 *
 */
public class ShiroExceptionHandler {

    private final ResponseRenderer renderer;
    private final ComponentSource componentSource;
    private final SecurityService securityService;
    private final PageService pageService;
    private final RequestGlobals requestGlobals;
    private final Response response;

    public ShiroExceptionHandler(ResponseRenderer renderer, ComponentSource componentSource,
            SecurityService securityService, PageService pageService, RequestGlobals requestGlobals,
            Response response) {
        this.renderer = renderer;
        this.componentSource = componentSource;
        this.securityService = securityService;
        this.pageService = pageService;
        this.requestGlobals = requestGlobals;
        this.response = response;
    }

    /**
     * TODO: Make configurable strategies objects for ShiroException
     */
    public void handle(ShiroException exception) throws IOException {

        if (securityService.isAuthenticated()) {

            String unauthorizedPage = pageService.getUnauthorizedPage();

            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
            if (!StringUtils.hasText(unauthorizedPage)) {
                return;
            }

            Component page = componentSource.getPage(unauthorizedPage);

            reportExceptionIfPossible(exception, page);

            renderer.renderPageMarkupResponse(unauthorizedPage);

        } else {
            Subject subject = securityService.getSubject();

            if (subject != null) {
                Session session = subject.getSession();
                if (session != null) {
                    WebUtils.saveRequest(requestGlobals.getHTTPServletRequest());
                }
            }

            Component page = componentSource.getPage(pageService.getLoginPage());

            reportExceptionIfPossible(exception, page);

            renderer.renderPageMarkupResponse(pageService.getLoginPage());

        }
    }

    private void reportExceptionIfPossible(ShiroException exception, Component rootComponent) {
        if (rootComponent instanceof ExceptionReporter) {
            ((ExceptionReporter) rootComponent).reportException(exception);
        }
    }
}