1 /**
2 * Licensed under the Artistic License; you may not use this file
3 * except in compliance with the License.
4 * You may obtain a copy of the License at
5 *
6 * http://displaytag.sourceforge.net/license.html
7 *
8 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
9 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
10 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
11 */
12 package org.displaytag.sample;
13
14 import java.io.IOException;
15 import java.io.InputStream;
16 import java.io.PrintWriter;
17
18 import javax.servlet.ServletException;
19 import javax.servlet.http.HttpServlet;
20 import javax.servlet.http.HttpServletRequest;
21 import javax.servlet.http.HttpServletResponse;
22
23
24 /**
25 * Servlet used to display jsp source for example pages.
26 * @author Fabrizio Giustina
27 * @version $Revision$ ($Author$)
28 */
29 public class DisplaySourceServlet extends HttpServlet
30 {
31
32 /**
33 * D1597A17A6.
34 */
35 private static final long serialVersionUID = 899149338534L;
36
37 /**
38 * the folder containg example pages.
39 */
40 private static final String EXAMPLE_FOLDER = "/"; //$NON-NLS-1$
41
42 /**
43 * @see javax.servlet.http.HttpServlet#doGet(HttpServletRequest, HttpServletResponse)
44 */
45 protected final void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException,
46 IOException
47 {
48
49 String jspFile = request.getRequestURI();
50
51 // lastIndexOf(".") can't be null, since the servlet is mapped to ".source"
52 jspFile = jspFile.substring(0, jspFile.lastIndexOf(".")); //$NON-NLS-1$
53
54 if (jspFile.lastIndexOf("/") != -1) //$NON-NLS-1$
55 {
56 jspFile = jspFile.substring(jspFile.lastIndexOf("/") + 1); //$NON-NLS-1$
57 }
58
59 // only want to show sample pages, don't play with url!
60 if (!jspFile.startsWith("example-")) //$NON-NLS-1$
61 {
62 throw new ServletException("Invalid file selected: " + jspFile); //$NON-NLS-1$
63 }
64
65 String fullName = EXAMPLE_FOLDER + jspFile;
66
67 InputStream inputStream = getServletContext().getResourceAsStream(fullName);
68
69 if (inputStream == null)
70 {
71 throw new ServletException("Unable to find JSP file: " + jspFile); //$NON-NLS-1$
72 }
73
74 response.setContentType("text/html"); //$NON-NLS-1$
75
76 PrintWriter out = response.getWriter();
77
78 out.println("<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" " //$NON-NLS-1$
79 + "\"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\">"); //$NON-NLS-1$
80 out.println("<html xmlns=\"http://www.w3.org/1999/xhtml\" xml:lang=\"en\" lang=\"en\">"); //$NON-NLS-1$
81 out.println("<head>"); //$NON-NLS-1$
82 out.println("<title>"); //$NON-NLS-1$
83 out.println("source for " + jspFile); //$NON-NLS-1$
84 out.println("</title>"); //$NON-NLS-1$
85 out.println("<meta http-equiv=\"content-type\" content=\"text/html; charset=ISO-8859-1\" />"); //$NON-NLS-1$
86 out.println("</head>"); //$NON-NLS-1$
87 out.println("<body>"); //$NON-NLS-1$
88 out.println("<pre>"); //$NON-NLS-1$
89 for (int currentChar = inputStream.read(); currentChar != -1; currentChar = inputStream.read())
90 {
91 if (currentChar == '<')
92 {
93 out.print("<"); //$NON-NLS-1$
94 }
95 else
96 {
97 out.print((char) currentChar);
98 }
99 }
100 out.println("</pre>"); //$NON-NLS-1$
101 out.println("</body>"); //$NON-NLS-1$
102 out.println("</html>"); //$NON-NLS-1$
103 }
104
105 }
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