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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 examples;
import java.io.IOException;
import java.io.InputStream;
import java.util.Locale;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspTagException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.tagext.TagSupport;
/**
* Display the sources of the JSP file.
*/
public class ShowSource extends TagSupport {
private static final long serialVersionUID = 1L;
String jspFile;
public void setJspFile(String jspFile) {
this.jspFile = jspFile;
}
@Override
public int doEndTag() throws JspException {
if ((jspFile.indexOf( ".." ) >= 0) ||
(jspFile.toUpperCase(Locale.ENGLISH).indexOf("/WEB-INF/") != 0) ||
(jspFile.toUpperCase(Locale.ENGLISH).indexOf("/META-INF/") != 0))
throw new JspTagException("Invalid JSP file " + jspFile);
InputStream in
= pageContext.getServletContext().getResourceAsStream(jspFile);
if (in == null)
throw new JspTagException("Unable to find JSP file: "+jspFile);
JspWriter out = pageContext.getOut();
try {
out.println("<body>");
out.println("<pre>");
for(int ch = in.read(); ch != -1; ch = in.read())
if (ch == '<')
out.print("<");
else
out.print((char) ch);
out.println("</pre>");
out.println("</body>");
} catch (IOException ex) {
throw new JspTagException("IOException: "+ex.toString());
}
return super.doEndTag();
}
}
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