org.codehaus.groovy.grails.plugins.springsecurity.AjaxAwareAccessDeniedHandler.java Source code

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Here is the source code for org.codehaus.groovy.grails.plugins.springsecurity.AjaxAwareAccessDeniedHandler.java

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/* Copyright 2006-2012 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.codehaus.groovy.grails.plugins.springsecurity;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.beans.factory.InitializingBean;
import org.springframework.security.access.AccessDeniedException;
import org.springframework.security.authentication.AuthenticationTrustResolver;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.PortResolver;
import org.springframework.security.web.WebAttributes;
import org.springframework.security.web.access.AccessDeniedHandler;
import org.springframework.security.web.savedrequest.DefaultSavedRequest;
import org.springframework.util.Assert;

/**
 * @author <a href='mailto:burt@burtbeckwith.com'>Burt Beckwith</a>
 */
public class AjaxAwareAccessDeniedHandler implements AccessDeniedHandler, InitializingBean {

    private String errorPage;
    private String ajaxErrorPage;
    private PortResolver portResolver;
    private AuthenticationTrustResolver authenticationTrustResolver;

    /**
     * {@inheritDoc}
     * @see org.springframework.security.web.access.AccessDeniedHandler#handle(
     *    javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse,
     *    org.springframework.security.access.AccessDeniedException)
     */
    public void handle(final HttpServletRequest request, final HttpServletResponse response,
            final AccessDeniedException e) throws IOException, ServletException {

        if (e != null && isLoggedIn() && authenticationTrustResolver.isRememberMe(getAuthentication())) {
            // user has a cookie but is getting bounced because of IS_AUTHENTICATED_FULLY,
            // so Acegi won't save the original request
            request.getSession().setAttribute(WebAttributes.SAVED_REQUEST,
                    new DefaultSavedRequest(request, portResolver));
        }

        if (response.isCommitted()) {
            return;
        }

        boolean ajaxError = ajaxErrorPage != null && SpringSecurityUtils.isAjax(request);
        if (errorPage == null && !ajaxError) {
            response.sendError(HttpServletResponse.SC_FORBIDDEN, e.getMessage());
            return;
        }

        boolean includePort = true;
        String scheme = request.getScheme();
        String serverName = request.getServerName();
        int serverPort = portResolver.getServerPort(request);
        String contextPath = request.getContextPath();
        boolean inHttp = "http".equals(scheme.toLowerCase());
        boolean inHttps = "https".equals(scheme.toLowerCase());

        if (inHttp && (serverPort == 80)) {
            includePort = false;
        } else if (inHttps && (serverPort == 443)) {
            includePort = false;
        }

        String redirectUrl = scheme + "://" + serverName + ((includePort) ? (":" + serverPort) : "") + contextPath;
        if (ajaxError) {
            redirectUrl += ajaxErrorPage;
        } else if (errorPage != null) {
            redirectUrl += errorPage;
        }
        response.sendRedirect(response.encodeRedirectURL(redirectUrl));
    }

    private Authentication getAuthentication() {
        return SecurityContextHolder.getContext() == null ? null
                : SecurityContextHolder.getContext().getAuthentication();
    }

    private boolean isLoggedIn() {
        Authentication authentication = getAuthentication();
        if (authentication == null) {
            return false;
        }
        return !authenticationTrustResolver.isAnonymous(authentication);
    }

    /**
     * Dependency injection for the error page, e.g. '/login/denied'.
     * @param page the page
     */
    public void setErrorPage(final String page) {
        Assert.isTrue(page == null || page.startsWith("/"), "ErrorPage must begin with '/'");
        errorPage = page;
    }

    /**
     * Dependency injection for the Ajax error page, e.g. '/login/ajaxDenied'.
     * @param page the page
     */
    public void setAjaxErrorPage(final String page) {
        Assert.isTrue(page == null || page.startsWith("/"), "Ajax ErrorPage must begin with '/'");
        ajaxErrorPage = page;
    }

    /**
     * Dependency injection for the port resolver.
     * @param resolver the resolver
     */
    public void setPortResolver(final PortResolver resolver) {
        portResolver = resolver;
    }

    /**
     * Dependency injection for the {@link AuthenticationTrustResolver}.
     * @param resolver the resolver
     */
    public void setAuthenticationTrustResolver(final AuthenticationTrustResolver resolver) {
        authenticationTrustResolver = resolver;
    }

    /**
     * {@inheritDoc}
     * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
     */
    public void afterPropertiesSet() {
        Assert.notNull(portResolver, "portResolver is required");
        Assert.notNull(authenticationTrustResolver, "authenticationTrustResolver is required");
    }
}