📄 portletinvalidmarkupfilter.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.protocol.http.portlet;import org.apache.wicket.IResponseFilter;import org.apache.wicket.RequestContext;import org.apache.wicket.util.string.AppendingStringBuffer;/** * This filter removes html page top level markup elements like <html>, <head> and <body>. The * filter is configured automatically by WicketFilter if it detects the application is (potentially) * invoked as a Portlet. * * @author Ate Douma */public class PortletInvalidMarkupFilter implements IResponseFilter{ /** * @see org.apache.wicket.IResponseFilter#filter(AppendingStringBuffer) */ public AppendingStringBuffer filter(AppendingStringBuffer responseBuffer) { RequestContext rc = RequestContext.get(); if (rc.isPortletRequest() && ((PortletRequestContext)rc).isEmbedded()) { deleteFragment(responseBuffer, "<?xml", "?>"); deleteFragment(responseBuffer, "<!DOCTYPE", ">"); deleteOpenTag(responseBuffer, "html"); deleteOpenTag(responseBuffer, "head"); deleteOpenTag(responseBuffer, "body"); } return responseBuffer; } private void deleteFragment(AppendingStringBuffer responseBuffer, String prefix, String postfix) { int startIndex, endIndex; if ((startIndex = responseBuffer.indexOf(prefix)) > -1) { if ((endIndex = responseBuffer.indexOf(postfix, startIndex)) > -1) { responseBuffer.delete(startIndex, endIndex + postfix.length()); } } } private void deleteOpenTag(AppendingStringBuffer responseBuffer, String tagName) { int startIndex, endIndex; // find and remove opening tag if ((startIndex = responseBuffer.indexOf("<" + tagName)) > -1) { if ((endIndex = responseBuffer.indexOf(">", startIndex)) > -1) { responseBuffer.delete(startIndex, endIndex + 1); } // remove closing tag if ((startIndex = responseBuffer.indexOf("</" + tagName + ">")) > -1) { responseBuffer.delete(startIndex, startIndex + tagName.length() + 3); } } }}⌨️ 快捷键说明
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