com.foc.vaadin.servlet.FocVaadinServlet.java Source code

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Here is the source code for com.foc.vaadin.servlet.FocVaadinServlet.java

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/*******************************************************************************
 * Copyright 2016 Antoine Nicolas SAMAHA
 * 
 * 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 com.foc.vaadin.servlet;

import java.io.IOException;
import java.io.Writer;

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

import org.jsoup.nodes.Element;

import com.foc.Globals;
import com.vaadin.server.BootstrapFragmentResponse;
import com.vaadin.server.BootstrapListener;
import com.vaadin.server.BootstrapPageResponse;
import com.vaadin.server.SessionInitEvent;
import com.vaadin.server.SessionInitListener;
import com.vaadin.server.VaadinServlet;
import com.vaadin.server.VaadinServletRequest;

@SuppressWarnings("serial")
public class FocVaadinServlet extends VaadinServlet {

    protected boolean hasAjaxWebCrawlerSupport() {
        return false;
    }

    protected String getFullURL(HttpServletRequest request) {
        StringBuffer requestURL = request.getRequestURL();
        String queryString = request.getQueryString();

        if (queryString == null) {
            return requestURL.toString();
        } else {
            return requestURL.append('?').append(queryString).toString();
        }
    }

    @Override
    protected void service(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        try {
            //         Globals.logString("FOC VAADIN    IN    Service");
            super.service(request, response);
            //         Globals.logString("FOC VAADIN    OUT   Service");
        } catch (Exception e) {
            boolean withPopup = true;

            StackTraceElement[] stack = e.getStackTrace();
            if (stack != null && stack.length > 0) {
                StackTraceElement element = stack[stack.length - 1];
                if (element != null && element.getClassName() != null
                        && element.getClassName().contains("com.vaadin.data.RpcDataProviderExtension")) {
                    withPopup = false;
                }
            }
            if (withPopup) {
                Globals.logException(e);
            } else {
                Globals.logExceptionWithoutPopup(e);
            }
        }
    }

    @Override
    protected VaadinServletRequest createVaadinRequest(HttpServletRequest request) {
        return new FocVaadinServletRequest(request, getService());
    }

    @Override
    protected void servletInitialized() throws ServletException {
        super.servletInitialized();
        getService().addSessionInitListener(new SessionInitListener() {

            @Override
            public void sessionInit(SessionInitEvent event) {
                event.getSession().addBootstrapListener(new BootstrapListener() {

                    @Override
                    public void modifyBootstrapFragment(BootstrapFragmentResponse response) {
                    }

                    @Override
                    public void modifyBootstrapPage(BootstrapPageResponse response) {
                        response.getDocument().head().prependElement("meta").attr("name", "viewport")
                                .attr("content", "width=device-width");
                        String robotKeywords = getRobotKeywords();
                        if (robotKeywords != null && !robotKeywords.isEmpty()) {
                            response.getDocument().head().prependElement("meta").attr("name", "robots")
                                    .attr("content", robotKeywords);
                            ;//robots" content="..., ..." /
                        }
                        if (hasAjaxWebCrawlerSupport()) {
                            Element elmt = response.getDocument().head().prependElement("meta");
                            elmt.attr("name", "fragment");
                            elmt.attr("content", "!");
                        }
                    }
                });
            }
        });
    }

    protected String getRobotKeywords() {
        return null;
    }

    // @Override
    // protected void writeAjaxPageHtmlHeader(BufferedWriter page, String title,
    // String themeUri) throws IOException {
    // super.writeAjaxPageHtmlHeader(page, title, themeUri);
    // page.append("<meta name=\"viewport\" content=\"width=320; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;\">");
    // }
}