001 /*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements. See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License. You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017 package examples;
018
019
020 import javax.servlet.jsp.*;
021 import javax.servlet.jsp.tagext.*;
022
023 import java.io.*;
024
025 /**
026 * Display the sources of the JSP file.
027 */
028 public class ShowSource
029 extends TagSupport
030 {
031 String jspFile;
032
033 public void setJspFile(String jspFile) {
034 this.jspFile = jspFile;
035 }
036
037 public int doEndTag() throws JspException {
038 if ((jspFile.indexOf( ".." ) >= 0) ||
039 (jspFile.toUpperCase().indexOf("/WEB-INF/") != 0) ||
040 (jspFile.toUpperCase().indexOf("/META-INF/") != 0))
041 throw new JspTagException("Invalid JSP file " + jspFile);
042
043 InputStream in
044 = pageContext.getServletContext().getResourceAsStream(jspFile);
045
046 if (in == null)
047 throw new JspTagException("Unable to find JSP file: "+jspFile);
048
049 InputStreamReader reader = new InputStreamReader(in);
050 JspWriter out = pageContext.getOut();
051
052
053 try {
054 out.println("<body>");
055 out.println("<pre>");
056 for(int ch = in.read(); ch != -1; ch = in.read())
057 if (ch == '<')
058 out.print("<");
059 else
060 out.print((char) ch);
061 out.println("</pre>");
062 out.println("</body>");
063 } catch (IOException ex) {
064 throw new JspTagException("IOException: "+ex.toString());
065 }
066 return super.doEndTag();
067 }
068 }
069
070
071
072