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/*
* This file is part of the Echo Web Application Framework (hereinafter "Echo").
* Copyright (C) 2002-2009 NextApp, Inc.
*
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*/
package nextapp.echo.webcontainer.service;
import java.io.IOException;
import java.util.Iterator;
import java.util.Properties;
import java.util.regex.Pattern;
import javax.xml.transform.OutputKeys;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Text;
import org.xml.sax.SAXException;
import nextapp.echo.app.ApplicationInstance;
import nextapp.echo.app.util.DomUtil;
import nextapp.echo.webcontainer.Connection;
import nextapp.echo.webcontainer.ContentType;
import nextapp.echo.webcontainer.Service;
import nextapp.echo.webcontainer.UserInstanceContainer;
import nextapp.echo.webcontainer.SynchronizationException;
import nextapp.echo.webcontainer.WebContainerServlet;
/**
* Completely re-renders a browser window.
* This is the default service invoked when the user visits an application.
*/
public class WindowHtmlService
implements Service {
/** The XHTML 1.0 Transitional Public ID. */
public static final String XHTML_1_0_TRANSITIONAL_PUBLIC_ID = "-//W3C//DTD XHTML 1.0 Transitional//EN";
/** The XHTML 1.0 Transitional System ID. */
public static final String XHTML_1_0_TRANSITIONAL_SYSTEM_ID = "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";
/** The XHTML 1.0 Namespace URI. */
public static final String XHTML_1_0_NAMESPACE_URI = "http://www.w3.org/1999/xhtml";
/** DOM identifier to use for root element. */
public static final String ROOT_ELEMENT_ID = "root";
/**
* OutputProperties used for XML transformation.
*/
private static final Properties OUTPUT_PROPERTIES = new Properties();
static {
// The XML declaration is omitted as Internet Explorer 6 will operate in quirks mode if it is present.
OUTPUT_PROPERTIES.setProperty(OutputKeys.OMIT_XML_DECLARATION, "yes");
OUTPUT_PROPERTIES.putAll(DomUtil.OUTPUT_PROPERTIES_INDENT);
OUTPUT_PROPERTIES.setProperty(OutputKeys.DOCTYPE_PUBLIC, XHTML_1_0_TRANSITIONAL_PUBLIC_ID);
OUTPUT_PROPERTIES.setProperty(OutputKeys.DOCTYPE_SYSTEM, XHTML_1_0_TRANSITIONAL_SYSTEM_ID);
}
private static final Pattern USER_AGENT_MSIE8 = Pattern.compile("MSIE 8\\.");
/** Singleton instance. */
public static final WindowHtmlService INSTANCE = new WindowHtmlService();
/**
* Create a new root window HTML document.
*
* @param conn the Connection
* @param debug flag indicating whether debug capabilities should be enabled
* @return the created document
*/
private Document createHtmlDocument(Connection conn, boolean debug) {
UserInstanceContainer userInstanceContainer = conn.getUserInstanceContainer();
String userAgent = conn.getRequest().getHeader("User-Agent");
Document document = DomUtil.createDocument("html", XHTML_1_0_TRANSITIONAL_PUBLIC_ID,
XHTML_1_0_TRANSITIONAL_SYSTEM_ID, XHTML_1_0_NAMESPACE_URI);
Element htmlElement = document.getDocumentElement();
Element headElement = document.createElement("head");
htmlElement.appendChild(headElement);
Element metaGeneratorElement = document.createElement("meta");
metaGeneratorElement.setAttribute("name", "generator");
metaGeneratorElement.setAttribute("content", ApplicationInstance.ID_STRING);
headElement.appendChild(metaGeneratorElement);
if (userAgent != null && USER_AGENT_MSIE8.matcher(userAgent).find()) {
// Force Internet Explorer 8 standards-compliant mode.
Element metaCompElement = document.createElement("meta");
metaCompElement.setAttribute("http-equiv", "X-UA-Compatible");
metaCompElement.setAttribute("content", "IE=8");
headElement.appendChild(metaCompElement);
}
// Force UTF-8 document code for IE9. See http://echo.nextapp.com/site/node/6658
Element contentTypeElement = document.createElement("meta");
contentTypeElement.setAttribute("http-equiv", "Content-Type");
contentTypeElement.setAttribute("content", "text/html; charset=utf-8");
headElement.appendChild(contentTypeElement);
Element titleElement = document.createElement("title");
titleElement.appendChild(document.createTextNode(" "));
headElement.appendChild(titleElement);
Element styleElement = document.createElement("style");
styleElement.setAttribute("type", "text/css");
styleElement.appendChild(document.createTextNode(" "));
headElement.appendChild(styleElement);
Element scriptElement = document.createElement("script");
Text textNode = document.createTextNode(" ");
scriptElement.appendChild(textNode);
scriptElement.setAttribute("type", "text/javascript");
scriptElement.setAttribute("src", userInstanceContainer.getServiceUri(BootService.SERVICE, null));
headElement.appendChild(scriptElement);
WebContainerServlet servlet = conn.getServlet();
// Include application-provided initialization scripts.
Iterator scriptIt = servlet.getInitScripts();
if (scriptIt != null) {
while (scriptIt.hasNext()) {
Service scriptService = (Service) scriptIt.next();
scriptElement = document.createElement("script");
textNode = document.createTextNode(" ");
scriptElement.appendChild(textNode);
scriptElement.setAttribute("type", "text/javascript");
scriptElement.setAttribute("src", userInstanceContainer.getServiceUri(scriptService, null));
headElement.appendChild(scriptElement);
}
}
// Include application-provided stylesheet(s).
Iterator styleSheetIt = servlet.getInitStyleSheets();
if (styleSheetIt != null) {
while (styleSheetIt.hasNext()) {
Service styleSheetService = (Service) styleSheetIt.next();
Element linkElement = document.createElement("link");
linkElement.setAttribute("rel", "StyleSheet");
linkElement.setAttribute("type", "text/css");
linkElement.setAttribute("href", userInstanceContainer.getServiceUri(styleSheetService, null));
headElement.appendChild(linkElement);
}
}
Element bodyElement = document.createElement("body");
bodyElement.setAttribute("id", "body");
bodyElement.setAttribute("onload", "Echo.Boot.boot('" + userInstanceContainer.getServletUri() + "', '" +
userInstanceContainer.createInitId(conn) + "', " + debug + ");");
bodyElement.setAttribute("style",
"height:100%;width:100%;margin:0px;padding:0px;" +
"font-family:verdana, arial, helvetica, sans-serif;font-size:10pt");
htmlElement.appendChild(bodyElement);
Element rootDivElement = document.createElement("div");
rootDivElement.setAttribute("style", "position:absolute;width:100%;height:100%;");
rootDivElement.setAttribute("id", userInstanceContainer.getRootHtmlElementId());
bodyElement.appendChild(rootDivElement);
return document;
}
/**
* @see Service#getId()
*/
public String getId() {
return WebContainerServlet.SERVICE_ID_DEFAULT;
}
/**
* @see Service#getVersion()
*/
public int getVersion() {
return DO_NOT_CACHE;
}
/**
* @see Service#service(nextapp.echo.webcontainer.Connection)
*/
public void service(Connection conn) throws IOException {
try {
boolean debug = !("false".equals(conn.getServlet().getInitParameter("echo.debug")));
Document document = createHtmlDocument(conn, debug);
conn.setContentType(ContentType.TEXT_HTML);
DomUtil.save(document, conn.getWriter(), OUTPUT_PROPERTIES);
} catch (SAXException ex) {
throw new SynchronizationException("Failed to write HTML document.", ex);
}
}
}
