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

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

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/*
 * Copyright 2007 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.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.security.AccessDeniedException;
import org.springframework.security.ui.AccessDeniedHandler;
import org.springframework.security.util.PortResolver;
import org.springframework.security.util.PortResolverImpl;

/**
 * AccessDeniedHandler for redirect to errorPage (not RequestDispatcher#forward).
 *
 * @author T.Yamamoto
 * @author <a href='mailto:beckwithb@studentsonly.com'>Burt Beckwith</a>
 */
public class GrailsAccessDeniedHandlerImpl implements AccessDeniedHandler {

    private String errorPage;
    private String ajaxErrorPage;
    private String ajaxHeader = WithAjaxAuthenticationProcessingFilterEntryPoint.AJAX_HEADER;
    private PortResolver portResolver = new PortResolverImpl();

    /**
     * {@inheritDoc}
     * @see org.springframework.security.ui.AccessDeniedHandler#handle(
     *    javax.servlet.ServletRequest, javax.servlet.ServletResponse,
     *    org.springframework.security.AccessDeniedException)
     */
    public void handle(final ServletRequest req, final ServletResponse res, final AccessDeniedException e)
            throws IOException {

        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) res;

        if (errorPage != null || (ajaxErrorPage != null && request.getHeader(ajaxHeader) != null)) {
            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 commonRedirectUrl = scheme + "://" + serverName + ((includePort) ? (":" + serverPort) : "")
                    + contextPath;
            String redirectUrl = commonRedirectUrl;
            if (ajaxErrorPage != null && request.getHeader(ajaxHeader) != null) {
                redirectUrl += ajaxErrorPage;
            } else if (errorPage != null) {
                redirectUrl += errorPage;
            } else {
                response.sendError(HttpServletResponse.SC_FORBIDDEN, e.getMessage());
            }

            response.sendRedirect(response.encodeRedirectURL(redirectUrl));
        }

        if (!response.isCommitted()) {
            // Send 403 (we do this after response has been written)
            response.sendError(HttpServletResponse.SC_FORBIDDEN, e.getMessage());
        }
    }

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

    /**
     * Dependency injection for the Ajax error page, e.g. '/login/deniedAjax'.
     * @param page  the page
     */
    public void setAjaxErrorPage(final String page) {
        if (page != null && !page.startsWith("/")) {
            throw new IllegalArgumentException("ErrorPage must begin with '/'");
        }
        ajaxErrorPage = page;
    }

    /**
     * Dependency injection for the Ajax header name; defaults to 'X-Requested-With'.
     * @param header  the header name
     */
    public void setAjaxHeader(final String header) {
        ajaxHeader = header;
    }
}