📄 ajaxserverandclienttimefilter.java
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/* * 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 org.apache.wicket.markup.html;import java.util.HashMap;import java.util.Map;import org.apache.wicket.Application;import org.apache.wicket.IResponseFilter;import org.apache.wicket.RequestCycle;import org.apache.wicket.util.string.AppendingStringBuffer;import org.apache.wicket.util.string.JavascriptUtils;import org.apache.wicket.util.string.interpolator.MapVariableInterpolator;import org.slf4j.Logger;import org.slf4j.LoggerFactory;/** * This is a filter that injects javascript code to the top head portion and after the body so that * the time can me measured what the client parse time was for this page. It also reports the total * server parse/response time in the client and logs the server response time and response size it * took for a specific response in the server log. * * You can specify what the status text should be like this: ServerAndClientTimeFilter.statustext=My * Application, Server parsetime: ${servertime}, Client parsetime: ${clienttime} likewise for ajax * request use ajax.ServerAndClientTimeFilter.statustext * * @author jcompagner */public class AjaxServerAndClientTimeFilter implements IResponseFilter{ private static Logger log = LoggerFactory.getLogger(AjaxServerAndClientTimeFilter.class); /** * @see org.apache.wicket.IResponseFilter#filter(org.apache.wicket.util.string.AppendingStringBuffer) */ public AppendingStringBuffer filter(AppendingStringBuffer responseBuffer) { int headIndex = responseBuffer.indexOf("<head>"); int bodyIndex = responseBuffer.indexOf("</body>"); int ajaxStart = responseBuffer.indexOf("<ajax-response>"); int ajaxEnd = responseBuffer.indexOf("</ajax-response>"); long timeTaken = System.currentTimeMillis() - RequestCycle.get().getStartTime(); if (headIndex != -1 && bodyIndex != -1) { AppendingStringBuffer endScript = new AppendingStringBuffer(150); endScript.append("\n").append(JavascriptUtils.SCRIPT_OPEN_TAG); endScript.append("\nwindow.defaultStatus='"); endScript.append(getStatusString(timeTaken, "ServerAndClientTimeFilter.statustext")); endScript.append("';\n").append(JavascriptUtils.SCRIPT_CLOSE_TAG).append("\n"); responseBuffer.insert(bodyIndex - 1, endScript); responseBuffer.insert(headIndex + 6, "\n" + JavascriptUtils.SCRIPT_OPEN_TAG + "\nvar clientTimeVariable = new Date().getTime();\n" + JavascriptUtils.SCRIPT_CLOSE_TAG + "\n"); } else if (ajaxStart != -1 && ajaxEnd != -1) { AppendingStringBuffer startScript = new AppendingStringBuffer(250); startScript.append("<evaluate><![CDATA[window.defaultStatus='"); startScript.append(getStatusString(timeTaken, "ajax.ServerAndClientTimeFilter.statustext")); startScript.append("';]]></evaluate>"); responseBuffer.insert(ajaxEnd, startScript.toString()); responseBuffer.insert(ajaxStart + 15, "<evaluate><![CDATA[clientTimeVariable = new Date().getTime();]]></evaluate>"); } log.info(timeTaken + "ms server time taken for request " + RequestCycle.get().getRequest().getURL() + " response size: " + responseBuffer.length()); return responseBuffer; } /** * Returns a locale specific status message about the server and client time. * * @param timeTaken * the server time it took * @param resourceKey * The key for the locale specific string lookup * @return String with the status message */ private String getStatusString(long timeTaken, String resourceKey) { final String txt = Application.get().getResourceSettings().getLocalizer().getString( resourceKey, null, "Server parsetime: ${servertime}, Client parsetime: ${clienttime}"); final Map map = new HashMap(4); map.put("clienttime", "' + (new Date().getTime() - clientTimeVariable)/1000 + 's"); map.put("servertime", ((double)timeTaken) / 1000 + "s"); return MapVariableInterpolator.interpolate(txt, map); }}⌨️ 快捷键说明
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