| 1 | /* |
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more |
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| 3 | * contributor license agreements. See the NOTICE file distributed with |
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| 4 | * this work for additional information regarding copyright ownership. |
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| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0 |
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| 6 | * (the "License"); you may not use this file except in compliance with |
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| 7 | * the License. You may obtain a copy of the License at |
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| 8 | * |
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
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| 10 | * |
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| 11 | * Unless required by applicable law or agreed to in writing, software |
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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| 14 | * See the License for the specific language governing permissions and |
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| 15 | * limitations under the License. |
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| 16 | */ |
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| 17 | package examples; |
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| 18 | |
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| 19 | |
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| 20 | import javax.servlet.jsp.*; |
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| 21 | import javax.servlet.jsp.tagext.*; |
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| 22 | |
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| 23 | import java.io.*; |
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| 24 | |
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| 25 | /** |
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| 26 | * Display the sources of the JSP file. |
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| 27 | */ |
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| 28 | public class ShowSource |
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| 29 | extends TagSupport |
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| 30 | { |
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| 31 | String jspFile; |
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| 32 | |
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| 33 | public void setJspFile(String jspFile) { |
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| 34 | this.jspFile = jspFile; |
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| 35 | } |
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| 36 | |
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| 37 | public int doEndTag() throws JspException { |
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| 38 | if ((jspFile.indexOf( ".." ) >= 0) || |
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| 39 | (jspFile.toUpperCase().indexOf("/WEB-INF/") != 0) || |
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| 40 | (jspFile.toUpperCase().indexOf("/META-INF/") != 0)) |
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| 41 | throw new JspTagException("Invalid JSP file " + jspFile); |
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| 42 | |
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| 43 | InputStream in |
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| 44 | = pageContext.getServletContext().getResourceAsStream(jspFile); |
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| 45 | |
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| 46 | if (in == null) |
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| 47 | throw new JspTagException("Unable to find JSP file: "+jspFile); |
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| 48 | |
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| 49 | JspWriter out = pageContext.getOut(); |
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| 50 | |
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| 51 | |
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| 52 | try { |
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| 53 | out.println("<body>"); |
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| 54 | out.println("<pre>"); |
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| 55 | for(int ch = in.read(); ch != -1; ch = in.read()) |
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| 56 | if (ch == '<') |
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| 57 | out.print("<"); |
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| 58 | else |
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| 59 | out.print((char) ch); |
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| 60 | out.println("</pre>"); |
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| 61 | out.println("</body>"); |
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| 62 | } catch (IOException ex) { |
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| 63 | throw new JspTagException("IOException: "+ex.toString()); |
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| 64 | } |
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| 65 | return super.doEndTag(); |
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| 66 | } |
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| 67 | } |
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| 68 | |
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| 69 | |
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| 70 | |
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| 71 | |
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