/* | |
* Copyright 1999-2011 Alibaba Group. | |
* | |
* 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.alibaba.dubbo.container.page; | |
import java.io.IOException; | |
import java.io.PrintWriter; | |
import java.util.ArrayList; | |
import java.util.Arrays; | |
import java.util.Collection; | |
import java.util.Collections; | |
import java.util.List; | |
import java.util.Map; | |
import java.util.Random; | |
import java.util.concurrent.ConcurrentHashMap; | |
import javax.servlet.ServletException; | |
import javax.servlet.http.HttpServlet; | |
import javax.servlet.http.HttpServletRequest; | |
import javax.servlet.http.HttpServletResponse; | |
import com.alibaba.dubbo.common.Constants; | |
import com.alibaba.dubbo.common.URL; | |
import com.alibaba.dubbo.common.extension.ExtensionLoader; | |
import com.alibaba.dubbo.common.logger.Logger; | |
import com.alibaba.dubbo.common.logger.LoggerFactory; | |
import com.alibaba.dubbo.common.utils.StringUtils; | |
/** | |
* PageServlet | |
* | |
* @author william.liangf | |
*/ | |
public class PageServlet extends HttpServlet { | |
private static final long serialVersionUID = -8370312705453328501L; | |
protected static final Logger logger = LoggerFactory.getLogger(PageServlet.class); | |
protected final Random random = new Random(); | |
protected final Map<String, PageHandler> pages = new ConcurrentHashMap<String, PageHandler>(); | |
protected final List<PageHandler> menus = new ArrayList<PageHandler>(); | |
private static PageServlet INSTANCE; | |
public static PageServlet getInstance() { | |
return INSTANCE; | |
} | |
public List<PageHandler> getMenus() { | |
return Collections.unmodifiableList(menus); | |
} | |
@Override | |
public void init() throws ServletException { | |
super.init(); | |
INSTANCE = this; | |
String config = getServletConfig().getInitParameter("pages"); | |
Collection<String> names; | |
if (config != null && config.length() > 0) { | |
names = Arrays.asList(Constants.COMMA_SPLIT_PATTERN.split(config)); | |
} else { | |
names = ExtensionLoader.getExtensionLoader(PageHandler.class).getSupportedExtensions(); | |
} | |
for (String name : names) { | |
PageHandler handler = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtension(name); | |
pages.put(ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler), handler); | |
Menu menu = handler.getClass().getAnnotation(Menu.class); | |
if (menu != null) { | |
menus.add(handler); | |
} | |
} | |
Collections.sort(menus, new MenuComparator()); | |
} | |
@Override | |
protected final void doGet(HttpServletRequest request, HttpServletResponse response) | |
throws ServletException, IOException { | |
doPost(request, response); | |
} | |
@Override | |
protected final void doPost(HttpServletRequest request, HttpServletResponse response) | |
throws ServletException, IOException { | |
if (! response.isCommitted()) { | |
PrintWriter writer = response.getWriter(); | |
String uri = request.getRequestURI(); | |
boolean isHtml = false; | |
if (uri == null || uri.length() == 0 || "/".equals(uri)) { | |
uri = "index"; | |
isHtml = true; | |
} else { | |
if (uri.startsWith("/")) { | |
uri = uri.substring(1); | |
} | |
if (uri.endsWith(".html")) { | |
uri = uri.substring(0, uri.length() - ".html".length()); | |
isHtml = true; | |
} | |
} | |
if (uri.endsWith("favicon.ico")) { | |
response.sendError(HttpServletResponse.SC_NOT_FOUND); | |
return; | |
} | |
ExtensionLoader<PageHandler> pageHandlerLoader = ExtensionLoader.getExtensionLoader(PageHandler.class); | |
PageHandler pageHandler = pageHandlerLoader.hasExtension(uri) ? pageHandlerLoader.getExtension(uri) : null; | |
if (isHtml) { | |
writer.println("<html><head><title>Dubbo</title>"); | |
writer.println("<style type=\"text/css\">html, body {margin: 10;padding: 0;background-color: #6D838C;font-family: Arial, Verdana;font-size: 12px;color: #FFFFFF;text-align: center;vertical-align: middle;word-break: break-all; } table {width: 90%; margin: 0px auto;border-collapse: collapse;border: 8px solid #FFFFFF; } thead tr {background-color: #253c46; } tbody tr {background-color: #8da5af; } th {padding-top: 4px;padding-bottom: 4px;font-size: 14px;height: 20px; } td {margin: 3px;padding: 3px;border: 2px solid #FFFFFF;font-size: 14px;height: 25px; } a {color: #FFFFFF;cursor: pointer;text-decoration: underline; } a:hover {text-decoration: none; }</style>"); | |
writer.println("</head><body>"); | |
} | |
if (pageHandler != null) { | |
Page page = null; | |
try { | |
String query = request.getQueryString(); | |
page = pageHandler.handle(URL.valueOf(request.getRequestURL().toString() | |
+ (query == null || query.length() == 0 ? "" : "?" + query))); | |
} catch (Throwable t) { | |
logger.warn(t.getMessage(), t); | |
String msg = t.getMessage(); | |
if (msg == null) { | |
msg = StringUtils.toString(t); | |
} | |
if (isHtml) { | |
writer.println("<table>"); | |
writer.println("<thead>"); | |
writer.println(" <tr>"); | |
writer.println(" <th>Error</th>"); | |
writer.println(" </tr>"); | |
writer.println("</thead>"); | |
writer.println("<tbody>"); | |
writer.println(" <tr>"); | |
writer.println(" <td>"); | |
writer.println(" " + msg.replace("<", "<").replace(">", "<").replace("\n", "<br/>")); | |
writer.println(" </td>"); | |
writer.println(" </tr>"); | |
writer.println("</tbody>"); | |
writer.println("</table>"); | |
writer.println("<br/>"); | |
} else { | |
writer.println(msg); | |
} | |
} | |
if (page != null) { | |
if (isHtml) { | |
String nav = page.getNavigation(); | |
if (nav == null || nav.length() == 0) { | |
nav = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(pageHandler); | |
nav = nav.substring(0, 1).toUpperCase() + nav.substring(1); | |
} | |
if (! "index".equals(uri)) { | |
nav = "<a href=\"/\">Home</a> > " + nav; | |
} | |
writeMenu(request, writer, nav); | |
writeTable(writer, page.getTitle(), page.getColumns(), | |
page.getRows()); | |
} else { | |
if (page.getRows().size() > 0 && page.getRows().get(0).size() > 0) { | |
writer.println(page.getRows().get(0).get(0)); | |
} | |
} | |
} | |
} else { | |
if (isHtml) { | |
writer.println("<table>"); | |
writer.println("<thead>"); | |
writer.println(" <tr>"); | |
writer.println(" <th>Error</th>"); | |
writer.println(" </tr>"); | |
writer.println("</thead>"); | |
writer.println("<tbody>"); | |
writer.println(" <tr>"); | |
writer.println(" <td>"); | |
writer.println(" Not found " + uri + " page. Please goto <a href=\"/\">Home</a> page."); | |
writer.println(" </td>"); | |
writer.println(" </tr>"); | |
writer.println("</tbody>"); | |
writer.println("</table>"); | |
writer.println("<br/>"); | |
} else { | |
writer.println("Not found " + uri + " page."); | |
} | |
} | |
if (isHtml) { | |
writer.println("</body></html>"); | |
} | |
writer.flush(); | |
} | |
} | |
protected final void writeMenu(HttpServletRequest request, PrintWriter writer, String nav) { | |
writer.println("<table>"); | |
writer.println("<thead>"); | |
writer.println(" <tr>"); | |
for (PageHandler handler : menus) { | |
String uri = ExtensionLoader.getExtensionLoader(PageHandler.class).getExtensionName(handler); | |
Menu menu = handler.getClass().getAnnotation(Menu.class); | |
writer.println(" <th><a href=\"" + uri + ".html\">" + menu.name() + "</a></th>"); | |
} | |
writer.println(" </tr>"); | |
writer.println("</thead>"); | |
writer.println("<tbody>"); | |
writer.println(" <tr>"); | |
writer.println(" <td style=\"text-align: left\" colspan=\"" + menus.size() + "\">"); | |
writer.println(nav); | |
writer.println(" </td>"); | |
writer.println(" </tr>"); | |
writer.println("</tbody>"); | |
writer.println("</table>"); | |
writer.println("<br/>"); | |
} | |
protected final void writeTable(PrintWriter writer, String title, List<String> columns, | |
List<List<String>> rows) { | |
int n = random.nextInt(); | |
int c = (columns == null ? (rows == null || rows.size() == 0 ? 0 : rows.get(0).size()) | |
: columns.size()); | |
int r = (rows == null ? 0 : rows.size()); | |
writer.println("<table>"); | |
writer.println("<thead>"); | |
writer.println(" <tr>"); | |
writer.println(" <th colspan=\"" + c + "\">" + title + "</th>"); | |
writer.println(" </tr>"); | |
if (columns != null && columns.size() > 0) { | |
writer.println(" <tr>"); | |
for (int i = 0; i < columns.size(); i++) { | |
String col = columns.get(i); | |
if (col.endsWith(":")) { | |
col += " <input type=\"text\" id=\"in_" | |
+ n | |
+ "_" | |
+ i | |
+ "\" onkeyup=\"for (var i = 0; i < " | |
+ r | |
+ "; i ++) { var m = true; for (var j = 0; j < " | |
+ columns.size() | |
+ "; j ++) { if (document.getElementById('in_" | |
+ n | |
+ "_' + j)) { var iv = document.getElementById('in_" | |
+ n | |
+ "_' + j).value; var tv = document.getElementById('td_" | |
+ n | |
+ "_' + i + '_' + j).innerHTML; if (iv.length > 0 && (tv.length < iv.length || tv.indexOf(iv) == -1)) { m = false; break; } } } document.getElementById('tr_" | |
+ n | |
+ "_' + i).style.display = (m ? '' : 'none');}\" sytle=\"width: 100%\" />"; | |
} | |
writer.println(" <td>" + col + "</td>"); | |
} | |
writer.println(" </tr>"); | |
} | |
writer.println("</thead>"); | |
if (rows != null && rows.size() > 0) { | |
writer.println("<tbody>"); | |
int i = 0; | |
for (Collection<String> row : rows) { | |
writer.println(" <tr id=\"tr_" + n + "_" + i + "\">"); | |
int j = 0; | |
for (String col : row) { | |
writer.println(" <td id=\"td_" + n + "_" + i + "_" + j | |
+ "\" style=\"display: ;\">" + col + "</td>"); | |
j++; | |
} | |
writer.println(" </tr>"); | |
i++; | |
} | |
writer.println("</tbody>"); | |
} | |
writer.println("</table>"); | |
writer.println("<br/>"); | |
} | |
} |