javascriptのlocation.replaceを実行するResponsePage.java

ResponsePageEx.java

/*
 * 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 xyz.monotalk.web.wicket.markup.html.pages;

import org.apache.wicket.Component;
import org.apache.wicket.Page;
import org.apache.wicket.behavior.Behavior;
import org.apache.wicket.core.request.handler.PageProvider;
import org.apache.wicket.core.request.handler.RenderPageRequestHandler;
import org.apache.wicket.markup.head.IHeaderResponse;
import org.apache.wicket.markup.head.OnDomReadyHeaderItem;
import org.apache.wicket.markup.html.pages.RedirectPage;

/**
 * Page that let the browser redirect. Use this if you want to direct the browser to some external
 * URL, like Google etc. or if you want to redirect to a Wicket page, but with a delay.
 *
 * @author Kem
 */
public class RedirectPageEx extends RedirectPage {

    private static final long serialVersionUID = 1L;

    /**
     * Constructor. The page will immediately redirect to the given url.
     *
     * @param url The url to redirect to
     */
    public RedirectPageEx(final CharSequence url) {
        this(url, 0);
    }

    /**
     * Constructor. The page will redirect to the given url after waiting for the given number of
     * seconds.
     *
     * @param url                         The url to redirect to
     * @param waitBeforeRedirectInSeconds The number of seconds the browser should wait before redirecting
     */
    public RedirectPageEx(final CharSequence url, final int waitBeforeRedirectInSeconds) {
        super(url, waitBeforeRedirectInSeconds);
        Behavior behavior = new AddLocationReplaceScript(url, waitBeforeRedirectInSeconds);
        add(behavior);
    }

    /**
     * Construct. The page will redirect to the given Page.
     *
     * @param page The page to redirect to.
     */
    public RedirectPageEx(final Page page) {
        this(page, 0);
    }

    /**
     * Construct. The page will redirect to the given Page after waiting for the given number of
     * seconds.
     *
     * @param page                        The page to redirect to.
     * @param waitBeforeRedirectInSeconds The number of seconds the browser should wait before redirecting
     */
    public RedirectPageEx(final Page page, final int waitBeforeRedirectInSeconds) {
        this(page.urlFor(new RenderPageRequestHandler(new PageProvider(page))),
                waitBeforeRedirectInSeconds);
    }

    /**
     * @see org.apache.wicket.Component#isVersioned()
     */
    @Override
    public boolean isVersioned() {
        return false;
    }

    private class AddLocationReplaceScript extends Behavior {

        private static final long serialVersionUID = 267018930484253173L;

        private CharSequence url;
        private int waitBeforeRedirectInSeconds;

        /**
         * AddLocationReplaceScript
         *
         * @param url
         * @param waitBeforeRedirectInSeconds
         */
        public AddLocationReplaceScript(CharSequence url, int waitBeforeRedirectInSeconds) {
            this.url = url;
            this.waitBeforeRedirectInSeconds = waitBeforeRedirectInSeconds;
        }

        /**
         * Render to the web response whatever the component wants to contribute to the head section.
         *
         * @param component
         * @param response  Response object
         */
        @Override
        public void renderHead(Component component, IHeaderResponse response) {
            response.render(OnDomReadyHeaderItem.forScript(newLocationReplaceScript(this.url, this.waitBeforeRedirectInSeconds)));
        }

        private CharSequence newLocationReplaceScript(CharSequence url, int waitBeforeRedirectInSeconds) {
            StringBuilder sb = new StringBuilder();
            sb.append("setTimeout(function(){");
            sb.append("window.location.replace('");
           // escape single-quotation
            sb.append(url.toString().replace("'", "\\'"));
            sb.append("');},");
            sb.append(waitBeforeRedirectInSeconds * 1000);
            sb.append(")");
            return sb.toString();
        }
    }
}