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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2013 Mort Bay Consulting Pty. Ltd.
4   //  ------------------------------------------------------------------------
5   //  All rights reserved. This program and the accompanying materials
6   //  are made available under the terms of the Eclipse Public License v1.0
7   //  and Apache License v2.0 which accompanies this distribution.
8   //
9   //      The Eclipse Public License is available at
10  //      http://www.eclipse.org/legal/epl-v10.html
11  //
12  //      The Apache License v2.0 is available at
13  //      http://www.opensource.org/licenses/apache2.0.php
14  //
15  //  You may elect to redistribute this code under either of these licenses.
16  //  ========================================================================
17  //
18  
19  package com.acme;
20  
21  import java.io.BufferedWriter;
22  import java.io.File;
23  import java.io.IOException;
24  import java.io.InputStream;
25  import java.io.OutputStream;
26  import java.io.OutputStreamWriter;
27  import java.io.PrintWriter;
28  import java.io.Reader;
29  import java.lang.reflect.Array;
30  import java.lang.reflect.Field;
31  import java.net.URL;
32  import java.util.Collections;
33  import java.util.Date;
34  import java.util.Enumeration;
35  import java.util.Locale;
36  import java.util.Timer;
37  import java.util.TimerTask;
38  
39  import javax.servlet.ServletConfig;
40  import javax.servlet.ServletContext;
41  import javax.servlet.ServletException;
42  import javax.servlet.ServletRequest;
43  import javax.servlet.ServletRequestWrapper;
44  import javax.servlet.ServletResponse;
45  import javax.servlet.ServletResponseWrapper;
46  import javax.servlet.UnavailableException;
47  import javax.servlet.http.Cookie;
48  import javax.servlet.http.HttpServlet;
49  import javax.servlet.http.HttpServletRequest;
50  import javax.servlet.http.HttpServletRequestWrapper;
51  import javax.servlet.http.HttpServletResponse;
52  import javax.servlet.http.HttpServletResponseWrapper;
53  
54  import org.eclipse.jetty.continuation.Continuation;
55  import org.eclipse.jetty.continuation.ContinuationListener;
56  import org.eclipse.jetty.continuation.ContinuationSupport;
57  
58  /** 
59   * Dump Servlet Request.
60   */
61  @SuppressWarnings("serial")
62  public class Dump extends HttpServlet
63  {
64      boolean fixed;
65      Timer _timer;
66  
67      /* ------------------------------------------------------------ */
68      @Override
69      public void init(ServletConfig config) throws ServletException
70      {
71      	super.init(config);
72  
73      	if (config.getInitParameter("unavailable")!=null && !fixed)
74      	{
75  
76      	    fixed=true;
77      	    throw new UnavailableException("Unavailable test",Integer.parseInt(config.getInitParameter("unavailable")));
78      	}
79  
80      	_timer=new Timer(true);
81      }
82  
83      /* ------------------------------------------------------------ */
84      @Override
85      public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
86      {
87          doGet(request, response);
88      }
89  
90      /* ------------------------------------------------------------ */
91      @Override
92      public void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
93      {
94          byte[] buffer = new byte[8192];
95          int len=request.getContentLength();
96          int c=0;
97          InputStream in=request.getInputStream();
98          while (c<len)
99          {
100             int l = in.read(buffer);
101             if (l<0)
102                 break;
103             c+=l;
104         }
105         request.setAttribute("PUT",c+"bytes");
106         doGet(request, response);
107     }
108 
109     /* ------------------------------------------------------------ */
110     @Override
111     public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException
112     {
113         if (request.getRemoteUser()==null)
114         {
115             try
116             {
117                 request.login("user", "password");
118             }
119             catch(ServletException se)
120             {
121             	se.printStackTrace();
122             }
123         }
124 
125         // Handle a dump of data
126         final String data= request.getParameter("data");
127         final String chars= request.getParameter("chars");
128         final String block= request.getParameter("block");
129         final String dribble= request.getParameter("dribble");
130         final boolean flush= request.getParameter("flush")!=null?Boolean.parseBoolean(request.getParameter("flush")):false;
131 
132 
133         if(request.getPathInfo()!=null && request.getPathInfo().toLowerCase(Locale.ENGLISH).indexOf("script")!=-1)
134         {
135             response.sendRedirect(response.encodeRedirectURL(getServletContext().getContextPath() + "/dump/info"));
136             return;
137         }
138 
139         request.setCharacterEncoding("UTF-8");
140 
141         if (request.getParameter("busy")!=null)
142         {
143             long end = System.currentTimeMillis()+Long.parseLong(request.getParameter("busy"));
144             while(System.currentTimeMillis()<end)
145             {}
146         }
147 
148         if (request.getParameter("empty")!=null)
149         {
150             response.setStatus(200);
151             response.flushBuffer();
152             return;
153         }
154 
155         if (request.getParameter("sleep")!=null)
156         {
157             try
158             {
159                 long s = Long.parseLong(request.getParameter("sleep"));
160                 if (request.getHeader("Expect")!=null && request.getHeader("Expect").indexOf("102")>=0)
161                 {
162                     Thread.sleep(s/2);
163                     response.sendError(102);
164                     Thread.sleep(s/2);
165                 }
166                 else
167                     Thread.sleep(s);
168             }
169             catch (InterruptedException e)
170             {
171                 return;
172             }
173             catch (Exception e)
174             {
175                 throw new ServletException(e);
176             }
177         }
178 
179         if (request.getAttribute("RESUME")==null && request.getParameter("resume")!=null)
180         {
181             request.setAttribute("RESUME",Boolean.TRUE);
182 
183             final long resume=Long.parseLong(request.getParameter("resume"));
184             final Continuation continuation = ContinuationSupport.getContinuation(request);
185             _timer.schedule(new TimerTask()
186             {
187                 @Override
188                 public void run()
189                 {
190                     continuation.resume();
191                 }
192             },resume);
193 
194         }
195 
196         if (request.getParameter("complete")!=null)
197         {
198             final long complete=Long.parseLong(request.getParameter("complete"));
199             _timer.schedule(new TimerTask()
200             {
201                 @Override
202                 public void run()
203                 {
204                     try
205                     {
206                         response.setContentType("text/html");
207                         response.getOutputStream().println("<h1>COMPLETED</h1>");
208                         Continuation continuation = ContinuationSupport.getContinuation(request);
209                         continuation.complete();
210                     }
211                     catch(Exception e)
212                     {
213                         e.printStackTrace();
214                     }
215                 }
216             },complete);
217         }
218 
219         if (request.getParameter("suspend")!=null && request.getAttribute("SUSPEND")!=Boolean.TRUE)
220         {
221             request.setAttribute("SUSPEND",Boolean.TRUE);
222             try
223             {
224                 Continuation continuation = ContinuationSupport.getContinuation(request);
225                 continuation.setTimeout(Long.parseLong(request.getParameter("suspend")));
226                 continuation.suspend();
227 
228                 continuation.addContinuationListener(new ContinuationListener()
229                 {
230                     @Override
231                     public void onTimeout(Continuation continuation)
232                     {
233                         response.addHeader("Dump","onTimeout");
234                         try
235                         {
236                             if (!dump(response,data,chars,block,dribble,flush))
237                             {
238                                 response.setContentType("text/plain");
239                                 response.getOutputStream().println("EXPIRED");
240                             }
241                             continuation.complete();
242                         }
243                         catch (IOException e)
244                         {
245                             getServletContext().log("",e);
246                         }
247                     }
248 
249                     @Override
250                     public void onComplete(Continuation continuation)
251                     {
252                         response.addHeader("Dump","onComplete");
253                     }
254                 });
255 
256                 continuation.undispatch();
257             }
258             catch(Exception e)
259             {
260                 throw new ServletException(e);
261             }
262         }
263 
264         request.setAttribute("Dump", this);
265         getServletContext().setAttribute("Dump",this);
266         // getServletContext().log("dump "+request.getRequestURI());
267 
268         // Force a content length response
269         String length= request.getParameter("length");
270         if (length != null && length.length() > 0)
271         {
272             response.setContentLength(Integer.parseInt(length));
273         }
274 
275         // Handle a dump of data
276         if (dump(response,data,chars,block,dribble,flush))
277             return;
278 
279         // handle an exception
280         String info= request.getPathInfo();
281         if (info != null && info.endsWith("Exception"))
282         {
283             try
284             {
285                 throw (Throwable) Thread.currentThread().getContextClassLoader().loadClass(info.substring(1)).newInstance();
286             }
287             catch (Throwable th)
288             {
289                 throw new ServletException(th);
290             }
291         }
292 
293         // test a reset
294         String reset= request.getParameter("reset");
295         if (reset != null && reset.length() > 0)
296         {
297             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
298             response.setHeader("SHOULD_NOT","BE SEEN");
299             response.reset();
300         }
301 
302 
303         // handle an redirect
304         String redirect= request.getParameter("redirect");
305         if (redirect != null && redirect.length() > 0)
306         {
307             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
308             response.sendRedirect(response.encodeRedirectURL(redirect));
309             try
310             {
311                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
312             }
313             catch(IOException e)
314             {
315                 // ignored as stream is closed.
316             }
317             return;
318         }
319 
320         // handle an error
321         String error= request.getParameter("error");
322         if (error != null && error.length() > 0 && request.getAttribute("javax.servlet.error.status_code")==null)
323         {
324             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
325             response.sendError(Integer.parseInt(error));
326             try
327             {
328                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
329             }
330             catch(IllegalStateException e)
331             {
332                 try
333                 {
334                     response.getWriter().println("NOR THIS!!");
335                 }
336                 catch(IOException e2){}
337             }
338             catch(IOException e){}
339             return;
340         }
341 
342         // Handle a extra headers
343         String headers= request.getParameter("headers");
344         if (headers != null && headers.length() > 0)
345         {
346             long h=Long.parseLong(headers);
347             for (int i=0;i<h;i++)
348                 response.addHeader("Header"+i,"Value"+i);
349         }
350 
351         String buffer= request.getParameter("buffer");
352         if (buffer != null && buffer.length() > 0)
353             response.setBufferSize(Integer.parseInt(buffer));
354 
355         String charset= request.getParameter("charset");
356         if (charset==null)
357             charset="UTF-8";
358         response.setCharacterEncoding(charset);
359         response.setContentType("text/html");
360 
361         if (info != null && info.indexOf("Locale/") >= 0)
362         {
363             try
364             {
365                 String locale_name= info.substring(info.indexOf("Locale/") + 7);
366                 Field f= java.util.Locale.class.getField(locale_name);
367                 response.setLocale((Locale)f.get(null));
368             }
369             catch (Exception e)
370             {
371                 e.printStackTrace();
372                 response.setLocale(Locale.getDefault());
373             }
374         }
375 
376         String cn= request.getParameter("cookie");
377         String cv=request.getParameter("cookiev");
378         if (cn!=null && cv!=null)
379         {
380             Cookie cookie= new Cookie(cn, cv);
381             if (request.getParameter("version")!=null)
382                 cookie.setVersion(Integer.parseInt(request.getParameter("version")));
383             cookie.setComment("Cookie from dump servlet");
384             response.addCookie(cookie);
385         }
386 
387         String pi= request.getPathInfo();
388         if (pi != null && pi.startsWith("/ex"))
389         {
390             OutputStream out= response.getOutputStream();
391             out.write("</H1>This text should be reset</H1>".getBytes());
392             if ("/ex0".equals(pi))
393                 throw new ServletException("test ex0", new Throwable());
394             else if ("/ex1".equals(pi))
395                 throw new IOException("test ex1");
396             else if ("/ex2".equals(pi))
397                 throw new UnavailableException("test ex2");
398             else if (pi.startsWith("/ex3/"))
399                 throw new UnavailableException("test ex3",Integer.parseInt(pi.substring(5)));
400             throw new RuntimeException("test");
401         }
402 
403         if ("true".equals(request.getParameter("close")))
404             response.setHeader("Connection","close");
405 
406         String buffered= request.getParameter("buffered");
407 
408         PrintWriter pout=null;
409 
410         try
411         {
412             pout =response.getWriter();
413         }
414         catch(IllegalStateException e)
415         {
416             pout=new PrintWriter(new OutputStreamWriter(response.getOutputStream(),charset));
417         }
418         if (buffered!=null)
419             pout = new PrintWriter(new BufferedWriter(pout,Integer.parseInt(buffered)));
420 
421         try
422         {
423             pout.write("<html>\n<body>\n");
424             pout.write("<h1>Dump Servlet</h1>\n");
425             pout.write("<table width=\"95%\">");
426             pout.write("<tr>\n");
427             pout.write("<th align=\"right\">getMethod:&nbsp;</th>");
428             pout.write("<td>" + notag(request.getMethod())+"</td>");
429             pout.write("</tr><tr>\n");
430             pout.write("<th align=\"right\">getContentLength:&nbsp;</th>");
431             pout.write("<td>"+Integer.toString(request.getContentLength())+"</td>");
432             pout.write("</tr><tr>\n");
433             pout.write("<th align=\"right\">getContentType:&nbsp;</th>");
434             pout.write("<td>"+notag(request.getContentType())+"</td>");
435             pout.write("</tr><tr>\n");
436             pout.write("<th align=\"right\">getRequestURI:&nbsp;</th>");
437             pout.write("<td>"+notag(request.getRequestURI())+"</td>");
438             pout.write("</tr><tr>\n");
439             pout.write("<th align=\"right\">getRequestURL:&nbsp;</th>");
440             pout.write("<td>"+notag(request.getRequestURL().toString())+"</td>");
441             pout.write("</tr><tr>\n");
442             pout.write("<th align=\"right\">getContextPath:&nbsp;</th>");
443             pout.write("<td>"+request.getContextPath()+"</td>");
444             pout.write("</tr><tr>\n");
445             pout.write("<th align=\"right\">getServletPath:&nbsp;</th>");
446             pout.write("<td>"+notag(request.getServletPath())+"</td>");
447             pout.write("</tr><tr>\n");
448             pout.write("<th align=\"right\">getPathInfo:&nbsp;</th>");
449             pout.write("<td>"+notag(request.getPathInfo())+"</td>");
450             pout.write("</tr><tr>\n");
451             pout.write("<th align=\"right\">getPathTranslated:&nbsp;</th>");
452             pout.write("<td>"+notag(request.getPathTranslated())+"</td>");
453             pout.write("</tr><tr>\n");
454             pout.write("<th align=\"right\">getQueryString:&nbsp;</th>");
455             pout.write("<td>"+notag(request.getQueryString())+"</td>");
456             pout.write("</tr><tr>\n");
457 
458             pout.write("<th align=\"right\">getProtocol:&nbsp;</th>");
459             pout.write("<td>"+request.getProtocol()+"</td>");
460             pout.write("</tr><tr>\n");
461             pout.write("<th align=\"right\">getScheme:&nbsp;</th>");
462             pout.write("<td>"+request.getScheme()+"</td>");
463             pout.write("</tr><tr>\n");
464             pout.write("<th align=\"right\">getServerName:&nbsp;</th>");
465             pout.write("<td>"+notag(request.getServerName())+"</td>");
466             pout.write("</tr><tr>\n");
467             pout.write("<th align=\"right\">getServerPort:&nbsp;</th>");
468             pout.write("<td>"+Integer.toString(request.getServerPort())+"</td>");
469             pout.write("</tr><tr>\n");
470             pout.write("<th align=\"right\">getLocalName:&nbsp;</th>");
471             pout.write("<td>"+request.getLocalName()+"</td>");
472             pout.write("</tr><tr>\n");
473             pout.write("<th align=\"right\">getLocalAddr:&nbsp;</th>");
474             pout.write("<td>"+request.getLocalAddr()+"</td>");
475             pout.write("</tr><tr>\n");
476             pout.write("<th align=\"right\">getLocalPort:&nbsp;</th>");
477             pout.write("<td>"+Integer.toString(request.getLocalPort())+"</td>");
478             pout.write("</tr><tr>\n");
479             pout.write("<th align=\"right\">getRemoteUser:&nbsp;</th>");
480             pout.write("<td>"+request.getRemoteUser()+"</td>");
481             pout.write("</tr><tr>\n");
482             pout.write("<th align=\"right\">getUserPrincipal:&nbsp;</th>");
483             pout.write("<td>"+request.getUserPrincipal()+"</td>");
484             pout.write("</tr><tr>\n");
485             pout.write("<th align=\"right\">getRemoteAddr:&nbsp;</th>");
486             pout.write("<td>"+request.getRemoteAddr()+"</td>");
487             pout.write("</tr><tr>\n");
488             pout.write("<th align=\"right\">getRemoteHost:&nbsp;</th>");
489             pout.write("<td>"+request.getRemoteHost()+"</td>");
490             pout.write("</tr><tr>\n");
491             pout.write("<th align=\"right\">getRemotePort:&nbsp;</th>");
492             pout.write("<td>"+request.getRemotePort()+"</td>");
493             pout.write("</tr><tr>\n");
494             pout.write("<th align=\"right\">getRequestedSessionId:&nbsp;</th>");
495             pout.write("<td>"+request.getRequestedSessionId()+"</td>");
496             pout.write("</tr><tr>\n");
497             pout.write("<th align=\"right\">isSecure():&nbsp;</th>");
498             pout.write("<td>"+request.isSecure()+"</td>");
499 
500             pout.write("</tr><tr>\n");
501             pout.write("<th align=\"right\">encodeRedirectURL(/foo?bar):&nbsp;</th>");
502             pout.write("<td>"+response.encodeRedirectURL("/foo?bar")+"</td>");
503 
504             pout.write("</tr><tr>\n");
505             pout.write("<th align=\"right\">isUserInRole(admin):&nbsp;</th>");
506             pout.write("<td>"+request.isUserInRole("admin")+"</td>");
507 
508             pout.write("</tr><tr>\n");
509             pout.write("<th align=\"right\">getLocale:&nbsp;</th>");
510             pout.write("<td>"+request.getLocale()+"</td>");
511 
512             Enumeration<Locale> locales= request.getLocales();
513             while (locales.hasMoreElements())
514             {
515                 pout.write("</tr><tr>\n");
516                 pout.write("<th align=\"right\">getLocales:&nbsp;</th>");
517                 pout.write("<td>"+locales.nextElement()+"</td>");
518             }
519             pout.write("</tr><tr>\n");
520 
521             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Other HTTP Headers:</big></th>");
522             Enumeration<String> h= request.getHeaderNames();
523             String name;
524             while (h.hasMoreElements())
525             {
526                 name= (String)h.nextElement();
527 
528                 Enumeration<String> h2= request.getHeaders(name);
529                 while (h2.hasMoreElements())
530                 {
531                     String hv= (String)h2.nextElement();
532                     pout.write("</tr><tr>\n");
533                     pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
534                     pout.write("<td>"+notag(hv)+"</td>");
535                 }
536             }
537 
538             pout.write("</tr><tr>\n");
539             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Parameters:</big></th>");
540             h= request.getParameterNames();
541             while (h.hasMoreElements())
542             {
543                 name= (String)h.nextElement();
544                 pout.write("</tr><tr>\n");
545                 pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
546                 pout.write("<td>"+notag(request.getParameter(name))+"</td>");
547                 String[] values= request.getParameterValues(name);
548                 if (values == null)
549                 {
550                     pout.write("</tr><tr>\n");
551                     pout.write("<th align=\"right\">"+notag(name)+" Values:&nbsp;</th>");
552                     pout.write("<td>"+"NULL!"+"</td>");
553                 }
554                 else if (values.length > 1)
555                 {
556                     for (int i= 0; i < values.length; i++)
557                     {
558                         pout.write("</tr><tr>\n");
559                         pout.write("<th align=\"right\">"+notag(name)+"["+i+"]:&nbsp;</th>");
560                         pout.write("<td>"+notag(values[i])+"</td>");
561                     }
562                 }
563             }
564 
565             pout.write("</tr><tr>\n");
566             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Cookies:</big></th>");
567             Cookie[] cookies = request.getCookies();
568             for (int i=0; cookies!=null && i<cookies.length;i++)
569             {
570                 Cookie cookie = cookies[i];
571 
572                 pout.write("</tr><tr>\n");
573                 pout.write("<th align=\"right\">"+notag(cookie.getName())+":&nbsp;</th>");
574                 pout.write("<td>"+notag(cookie.getValue())+"</td>");
575             }
576 
577             String content_type=request.getContentType();
578             if (content_type!=null &&
579                 !content_type.startsWith("application/x-www-form-urlencoded") &&
580                 !content_type.startsWith("multipart/form-data"))
581             {
582                 pout.write("</tr><tr>\n");
583                 pout.write("<th align=\"left\" valign=\"top\" colspan=\"2\"><big><br/>Content:</big></th>");
584                 pout.write("</tr><tr>\n");
585                 pout.write("<td><pre>");
586                 char[] content= new char[4096];
587                 int len;
588                 try{
589                     Reader in=request.getReader();
590 
591                     while((len=in.read(content))>=0)
592                         pout.write(notag(new String(content,0,len)));
593                 }
594                 catch(IOException e)
595                 {
596                     pout.write(e.toString());
597                 }
598 
599                 pout.write("</pre></td>");
600             }
601 
602             pout.write("</tr><tr>\n");
603             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Attributes:</big></th>");
604             Enumeration<String> a= request.getAttributeNames();
605             while (a.hasMoreElements())
606             {
607                 name= (String)a.nextElement();
608                 pout.write("</tr><tr>\n");
609                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
610                 Object value=request.getAttribute(name);
611                 if (value instanceof File)
612                 {
613                     File file = (File)value;
614                     pout.write("<td>"+"<pre>" + file.getName()+" ("+file.length()+" "+new Date(file.lastModified())+ ")</pre>"+"</td>");
615                 }
616                 else
617                     pout.write("<td>"+"<pre>" + toString(request.getAttribute(name)) + "</pre>"+"</td>");
618             }
619             request.setAttribute("org.eclipse.jetty.servlet.MultiPartFilter.files",null);
620 
621 
622             pout.write("</tr><tr>\n");
623             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Servlet InitParameters:</big></th>");
624             a= getInitParameterNames();
625             while (a.hasMoreElements())
626             {
627                 name= (String)a.nextElement();
628                 pout.write("</tr><tr>\n");
629                 pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
630                 pout.write("<td>"+ toString(getInitParameter(name)) +"</td>");
631             }
632 
633             pout.write("</tr><tr>\n");
634             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context InitParameters:</big></th>");
635             a= getServletContext().getInitParameterNames();
636             while (a.hasMoreElements())
637             {
638                 name= (String)a.nextElement();
639                 pout.write("</tr><tr>\n");
640                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
641                 pout.write("<td>"+ toString(getServletContext().getInitParameter(name)) + "</td>");
642             }
643 
644             pout.write("</tr><tr>\n");
645             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context Attributes:</big></th>");
646             a= getServletContext().getAttributeNames();
647             while (a.hasMoreElements())
648             {
649                 name= (String)a.nextElement();
650                 pout.write("</tr><tr>\n");
651                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
652                 pout.write("<td>"+"<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>"+"</td>");
653             }
654 
655             String res= request.getParameter("resource");
656             if (res != null && res.length() > 0)
657             {
658                 pout.write("</tr><tr>\n");
659                 pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Get Resource: \""+res+"\"</big></th>");
660 
661                 pout.write("</tr><tr>\n");
662                 pout.write("<th align=\"right\">getServletContext().getResource(...):&nbsp;</th>");
663                 try{pout.write("<td>"+getServletContext().getResource(res)+"</td>");}
664                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
665 
666                 pout.write("</tr><tr>\n");
667                 pout.write("<th align=\"right\">getServletContext().getResourcePaths(...):&nbsp;</th>");
668                 try{pout.write("<td>"+getServletContext().getResourcePaths(res)+"</td>");}
669                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
670 
671                 pout.write("</tr><tr>\n");
672                 pout.write("<th align=\"right\">getServletContext().getContext(...):&nbsp;</th>");
673 
674                 ServletContext context = getServletContext().getContext(res);
675                 pout.write("<td>"+context+"</td>");
676 
677                 if (context!=null)
678                 {
679                     pout.write("</tr><tr>\n");
680                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResource(...):&nbsp;</th>");
681                     try{pout.write("<td>"+context.getResource(res)+"</td>");}
682                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
683 
684                     pout.write("</tr><tr>\n");
685                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResourcePaths(...):&nbsp;</th>");
686                     try{pout.write("<td>"+context.getResourcePaths(res)+"</td>");}
687                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
688 
689                     String cp=context.getContextPath();
690                     if (cp==null || "/".equals(cp))
691                         cp="";
692                     pout.write("</tr><tr>\n");
693                     pout.write("<th align=\"right\">getServletContext().getContext(...),getRequestDispatcher(...):&nbsp;</th>");
694                     pout.write("<td>"+getServletContext().getContext(res).getRequestDispatcher(res.substring(cp.length()))+"</td>");
695                 }
696 
697                 pout.write("</tr><tr>\n");
698                 pout.write("<th align=\"right\">this.getClass().getResource(...):&nbsp;</th>");
699                 pout.write("<td>"+this.getClass().getResource(res)+"</td>");
700 
701                 pout.write("</tr><tr>\n");
702                 pout.write("<th align=\"right\">this.getClass().getClassLoader().getResource(...):&nbsp;</th>");
703                 pout.write("<td>"+this.getClass().getClassLoader().getResource(res)+"</td>");
704 
705                 pout.write("</tr><tr>\n");
706                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResource(...):&nbsp;</th>");
707                 pout.write("<td>"+Thread.currentThread().getContextClassLoader().getResource(res)+"</td>");
708                 pout.write("</tr><tr>\n");
709                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResources(...):&nbsp;</th>");
710                 Enumeration<URL> urls = Thread.currentThread().getContextClassLoader().getResources(res);
711                 if (urls==null)
712                     pout.write("<td>null</td>");
713                 else
714                     pout.write("<td>"+Collections.list(urls)+"</td>");
715 
716             }
717 
718             pout.write("</tr></table>\n");
719 
720             /* ------------------------------------------------------------ */
721             pout.write("<h2>Request Wrappers</h2>\n");
722             ServletRequest rw=request;
723             int w=0;
724             while (rw !=null)
725             {
726                 pout.write((w++)+": "+rw.getClass().getName()+"<br/>");
727                 if (rw instanceof HttpServletRequestWrapper)
728                     rw=((HttpServletRequestWrapper)rw).getRequest();
729                 else if (rw instanceof ServletRequestWrapper)
730                     rw=((ServletRequestWrapper)rw).getRequest();
731                 else
732                     rw=null;
733             }
734 
735             /* ------------------------------------------------------------ */
736             pout.write("<h2>Response Wrappers</h2>\n");
737             ServletResponse rsw=response;
738             w=0;
739             while (rsw !=null)
740             {
741                 pout.write((w++)+": "+rsw.getClass().getName()+"<br/>");
742                 if (rsw instanceof HttpServletResponseWrapper)
743                     rsw=((HttpServletResponseWrapper)rsw).getResponse();
744                 else if (rsw instanceof ServletResponseWrapper)
745                     rsw=((ServletResponseWrapper)rsw).getResponse();
746                 else
747                     rsw=null;
748             }
749 
750             pout.write("<br/>");
751             pout.write("<h2>International Characters (UTF-8)</h2>");
752             pout.write("LATIN LETTER SMALL CAPITAL AE<br/>\n");
753             pout.write("Directly uni encoded(\\u1d01): \u1d01<br/>");
754             pout.write("HTML reference (&amp;AElig;): &AElig;<br/>");
755             pout.write("Decimal (&amp;#7425;): &#7425;<br/>");
756             pout.write("Javascript unicode (\\u1d01) : <script language='javascript'>document.write(\"\u1d01\");</script><br/>");
757             pout.write("<br/>");
758             pout.write("<h2>Form to generate GET content</h2>");
759             pout.write("<form method=\"GET\" action=\""+response.encodeURL(getURI(request))+"\">");
760             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
761             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\">");
762             pout.write("</form>");
763 
764             pout.write("<br/>");
765 
766             pout.write("<h2>Form to generate POST content</h2>");
767             pout.write("<form method=\"POST\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
768             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
769             pout.write("Select: <select multiple name=\"Select\">\n");
770             pout.write("<option>ValueA</option>");
771             pout.write("<option>ValueB1,ValueB2</option>");
772             pout.write("<option>ValueC</option>");
773             pout.write("</select><br/>");
774             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
775             pout.write("</form>");
776             pout.write("<br/>");
777 
778             pout.write("<h2>Form to generate UPLOAD content</h2>");
779             pout.write("<form method=\"POST\" enctype=\"multipart/form-data\" accept-charset=\"utf-8\" action=\""+
780                     response.encodeURL(getURI(request))+(request.getQueryString()==null?"":("?"+request.getQueryString()))+
781                     "\">");
782             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"comment\"/><br/>\n");
783             pout.write("File 1: <input type=\"file\" name=\"file1\" /><br/>\n");
784             pout.write("File 2: <input type=\"file\" name=\"file2\" /><br/>\n");
785             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
786             pout.write("</form>");
787 
788             pout.write("<h2>Form to set Cookie</h2>");
789             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
790             pout.write("cookie: <input type=\"text\" name=\"cookie\" /><br/>\n");
791             pout.write("value: <input type=\"text\" name=\"cookiev\" /><br/>\n");
792             pout.write("<input type=\"submit\" name=\"Action\" value=\"setCookie\">");
793             pout.write("</form>\n");
794 
795             pout.write("<h2>Form to get Resource</h2>");
796             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
797             pout.write("resource: <input type=\"text\" name=\"resource\" /><br/>\n");
798             pout.write("<input type=\"submit\" name=\"Action\" value=\"getResource\">");
799             pout.write("</form>\n");
800         }
801         catch (Exception e)
802         {
803             getServletContext().log("dump "+e);
804         }
805 
806         String lines= request.getParameter("lines");
807         if (lines!=null)
808         {
809             char[] line = "<span>A line of characters. Blah blah blah blah.  blooble blooble</span></br>\n".toCharArray();
810             for (int l=Integer.parseInt(lines);l-->0;)
811             {
812                 pout.write("<span>"+l+" </span>");
813                 pout.write(line);
814             }
815         }
816 
817         pout.write("</body>\n</html>\n");
818 
819         pout.close();
820 
821         if (pi != null)
822         {
823             if ("/ex4".equals(pi))
824                 throw new ServletException("test ex4", new Throwable());
825             if ("/ex5".equals(pi))
826                 throw new IOException("test ex5");
827             if ("/ex6".equals(pi))
828                 throw new UnavailableException("test ex6");
829         }
830 
831 
832     }
833 
834 
835     /* ------------------------------------------------------------ */
836     @Override
837     public String getServletInfo()
838     {
839         return "Dump Servlet";
840     }
841 
842     /* ------------------------------------------------------------ */
843     @Override
844     public synchronized void destroy()
845     {
846         _timer.cancel();
847     }
848 
849     /* ------------------------------------------------------------ */
850     private String getURI(HttpServletRequest request)
851     {
852         String uri= (String)request.getAttribute("javax.servlet.forward.request_uri");
853         if (uri == null)
854             uri= request.getRequestURI();
855         return uri;
856     }
857 
858     /* ------------------------------------------------------------ */
859     private static String toString(Object o)
860     {
861         if (o == null)
862             return null;
863 
864         try
865         {
866             if (o.getClass().isArray())
867             {
868                 StringBuffer sb = new StringBuffer();
869                 if (!o.getClass().getComponentType().isPrimitive())
870                 {
871                     Object[] array= (Object[])o;
872                     for (int i= 0; i < array.length; i++)
873                     {
874                         if (i > 0)
875                             sb.append("\n");
876                         sb.append(array.getClass().getComponentType().getName());
877                         sb.append("[");
878                         sb.append(i);
879                         sb.append("]=");
880                         sb.append(toString(array[i]));
881                     }
882                     return sb.toString();
883                 }
884                 else
885                 {
886                     int length = Array.getLength(o);
887                     for (int i=0;i<length;i++)
888                     {
889                         if (i > 0)
890                             sb.append("\n");
891                         sb.append(o.getClass().getComponentType().getName());
892                         sb.append("[");
893                         sb.append(i);
894                         sb.append("]=");
895                         sb.append(toString(Array.get(o, i)));
896                     }
897                     return sb.toString();
898                 }
899             }
900             else
901                 return o.toString();
902         }
903         catch (Exception e)
904         {
905             return e.toString();
906         }
907     }
908 
909     private boolean dump(HttpServletResponse response, String data, String chars, String block, String dribble, boolean flush) throws IOException
910     {
911         if (data != null && data.length() > 0)
912         {
913             long d=Long.parseLong(data);
914             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
915             byte[] buf=new byte[b];
916             for (int i=0;i<b;i++)
917             {
918 
919                 buf[i]=(byte)('0'+(i%10));
920                 if (i%10==9)
921                     buf[i]=(byte)'\n';
922             }
923             buf[0]='o';
924             OutputStream out=response.getOutputStream();
925             response.setContentType("text/plain");
926             while (d > 0)
927             {
928                 if (b==1)
929                 {
930                     out.write(d%80==0?'\n':'.');
931                     d--;
932                 }
933                 else if (d>=b)
934                 {
935                     out.write(buf);
936                     d=d-b;
937                 }
938                 else
939                 {
940                     out.write(buf,0,(int)d);
941                     d=0;
942                 }
943 
944                 if (dribble!=null)
945                 {
946                     out.flush();
947                     try
948                     {
949                         Thread.sleep(Long.parseLong(dribble));
950                     }
951                     catch (Exception e)
952                     {
953                         e.printStackTrace();
954                         break;
955                     }
956                 }
957 
958             }
959 
960             if (flush)
961                 out.flush();
962 
963             return true;
964         }
965 
966         // Handle a dump of data
967         if (chars != null && chars.length() > 0)
968         {
969             long d=Long.parseLong(chars);
970             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
971             char[] buf=new char[b];
972             for (int i=0;i<b;i++)
973             {
974                 buf[i]=(char)('0'+(i%10));
975                 if (i%10==9)
976                     buf[i]='\n';
977             }
978             buf[0]='o';
979             response.setContentType("text/plain");
980             PrintWriter out=response.getWriter();
981             while (d > 0 && !out.checkError())
982             {
983                 if (b==1)
984                 {
985                     out.write(d%80==0?'\n':'.');
986                     d--;
987                 }
988                 else if (d>=b)
989                 {
990                     out.write(buf);
991                     d=d-b;
992                 }
993                 else
994                 {
995                     out.write(buf,0,(int)d);
996                     d=0;
997                 }
998             }
999             return true;
1000         }
1001         return false;
1002     }
1003 
1004     private String notag(String s)
1005     {
1006         if (s==null)
1007             return "null";
1008         s=s.replaceAll("&","&amp;");
1009         s=s.replaceAll("<","&lt;");
1010         s=s.replaceAll(">","&gt;");
1011         return s;
1012     }
1013 }