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1   //
2   //  ========================================================================
3   //  Copyright (c) 1995-2012 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  import javax.servlet.ServletConfig;
39  import javax.servlet.ServletContext;
40  import javax.servlet.ServletException;
41  import javax.servlet.ServletRequest;
42  import javax.servlet.ServletRequestWrapper;
43  import javax.servlet.ServletResponse;
44  import javax.servlet.ServletResponseWrapper;
45  import javax.servlet.UnavailableException;
46  import javax.servlet.http.Cookie;
47  import javax.servlet.http.HttpServlet;
48  import javax.servlet.http.HttpServletRequest;
49  import javax.servlet.http.HttpServletRequestWrapper;
50  import javax.servlet.http.HttpServletResponse;
51  import javax.servlet.http.HttpServletResponseWrapper;
52  
53  import org.eclipse.jetty.continuation.Continuation;
54  import org.eclipse.jetty.continuation.ContinuationListener;
55  import org.eclipse.jetty.continuation.ContinuationSupport;
56  import org.eclipse.jetty.http.HttpHeader;
57  import org.eclipse.jetty.util.StringUtil;
58  import org.eclipse.jetty.util.log.Log;
59  import org.eclipse.jetty.util.log.Logger;
60  
61  /** 
62   * Dump Servlet Request.
63   */
64  @SuppressWarnings("serial")
65  public class Dump extends HttpServlet
66  {
67      private static final Logger LOG = Log.getLogger(Dump.class);
68  
69      boolean fixed;
70      Timer _timer;
71  
72      /* ------------------------------------------------------------ */
73      @Override
74      public void init(ServletConfig config) throws ServletException
75      {
76      	super.init(config);
77  
78      	if (config.getInitParameter("unavailable")!=null && !fixed)
79      	{
80  
81      	    fixed=true;
82      	    throw new UnavailableException("Unavailable test",Integer.parseInt(config.getInitParameter("unavailable")));
83      	}
84  
85      	_timer=new Timer(true);
86      }
87  
88      /* ------------------------------------------------------------ */
89      @Override
90      public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
91      {
92          doGet(request, response);
93      }
94  
95      /* ------------------------------------------------------------ */
96      @Override
97      public void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
98      {
99          byte[] buffer = new byte[8192];
100         int len=request.getContentLength();
101         int c=0;
102         InputStream in=request.getInputStream();
103         while (c<len)
104         {
105             int l = in.read(buffer);
106             if (l<0)
107                 break;
108             c+=l;
109         }
110         request.setAttribute("PUT",c+"bytes");
111         doGet(request, response);
112     }
113 
114     /* ------------------------------------------------------------ */
115     @Override
116     public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException
117     {
118         if (!request.isUserInRole("user"))
119         {
120             try
121             {
122                 request.login("user", "password");
123             }
124             catch(ServletException se)
125             {
126             	se.printStackTrace();
127             }
128         }
129 
130         // Handle a dump of data
131         final String data= request.getParameter("data");
132         final String chars= request.getParameter("chars");
133         final String block= request.getParameter("block");
134         final String dribble= request.getParameter("dribble");
135         final boolean flush= request.getParameter("flush")!=null?Boolean.parseBoolean(request.getParameter("flush")):false;
136 
137 
138         if(request.getPathInfo()!=null && request.getPathInfo().toLowerCase().indexOf("script")!=-1)
139         {
140             response.sendRedirect(response.encodeRedirectURL(getServletContext().getContextPath() + "/dump/info"));
141             return;
142         }
143 
144         request.setCharacterEncoding("UTF-8");
145 
146         if (request.getParameter("busy")!=null)
147         {
148             long end = System.currentTimeMillis()+Long.parseLong(request.getParameter("busy"));
149             while(System.currentTimeMillis()<end)
150             {}
151         }
152 
153         if (request.getParameter("empty")!=null)
154         {
155             response.setStatus(200);
156             response.flushBuffer();
157             return;
158         }
159 
160         if (request.getParameter("sleep")!=null)
161         {
162             try
163             {
164                 long s = Long.parseLong(request.getParameter("sleep"));
165                 if (request.getHeader(HttpHeader.EXPECT.asString())!=null && request.getHeader(HttpHeader.EXPECT.asString()).indexOf("102")>=0)
166                 {
167                     Thread.sleep(s/2);
168                     response.sendError(102);
169                     Thread.sleep(s/2);
170                 }
171                 else
172                     Thread.sleep(s);
173             }
174             catch (InterruptedException e)
175             {
176                 return;
177             }
178             catch (Exception e)
179             {
180                 throw new ServletException(e);
181             }
182         }
183 
184         if (request.getAttribute("RESUME")==null && request.getParameter("resume")!=null)
185         {
186             request.setAttribute("RESUME",Boolean.TRUE);
187 
188             final long resume=Long.parseLong(request.getParameter("resume"));
189             final Continuation continuation = ContinuationSupport.getContinuation(request);
190             _timer.schedule(new TimerTask()
191             {
192                 @Override
193                 public void run()
194                 {
195                     continuation.resume();
196                 }
197             },resume);
198 
199         }
200 
201         if (request.getParameter("complete")!=null)
202         {
203             final long complete=Long.parseLong(request.getParameter("complete"));
204             _timer.schedule(new TimerTask()
205             {
206                 @Override
207                 public void run()
208                 {
209                     try
210                     {
211                         response.setContentType("text/html");
212                         response.getOutputStream().println("<h1>COMPLETED</h1>");
213                         Continuation continuation = ContinuationSupport.getContinuation(request);
214                         continuation.complete();
215                     }
216                     catch(Exception e)
217                     {
218                         e.printStackTrace();
219                     }
220                 }
221             },complete);
222         }
223 
224         if (request.getParameter("suspend")!=null && request.getAttribute("SUSPEND")!=Boolean.TRUE)
225         {
226             request.setAttribute("SUSPEND",Boolean.TRUE);
227             try
228             {
229                 Continuation continuation = ContinuationSupport.getContinuation(request);
230                 continuation.setTimeout(Long.parseLong(request.getParameter("suspend")));
231                 continuation.suspend();
232 
233                 continuation.addContinuationListener(new ContinuationListener()
234                 {
235                     public void onTimeout(Continuation continuation)
236                     {
237                         response.addHeader("Dump","onTimeout");
238                         try
239                         {
240                             if (!dump(response,data,chars,block,dribble,flush))
241                             {
242                                 response.setContentType("text/plain");
243                                 response.getOutputStream().println("EXPIRED");
244                             }
245                             continuation.complete();
246                         }
247                         catch (IOException e)
248                         {
249                             LOG.ignore(e);
250                         }
251                     }
252 
253                     public void onComplete(Continuation continuation)
254                     {
255                         response.addHeader("Dump","onComplete");
256                     }
257                 });
258 
259                 continuation.undispatch();
260             }
261             catch(Exception e)
262             {
263                 throw new ServletException(e);
264             }
265         }
266 
267         request.setAttribute("Dump", this);
268         getServletContext().setAttribute("Dump",this);
269         // getServletContext().log("dump "+request.getRequestURI());
270 
271         // Force a content length response
272         String length= request.getParameter("length");
273         if (length != null && length.length() > 0)
274         {
275             response.setContentLength(Integer.parseInt(length));
276         }
277 
278         // Handle a dump of data
279         if (dump(response,data,chars,block,dribble,flush))
280             return;
281 
282         // handle an exception
283         String info= request.getPathInfo();
284         if (info != null && info.endsWith("Exception"))
285         {
286             try
287             {
288                 throw (Throwable) Thread.currentThread().getContextClassLoader().loadClass(info.substring(1)).newInstance();
289             }
290             catch (Throwable th)
291             {
292                 throw new ServletException(th);
293             }
294         }
295 
296         // test a reset
297         String reset= request.getParameter("reset");
298         if (reset != null && reset.length() > 0)
299         {
300             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
301             response.setHeader("SHOULD_NOT","BE SEEN");
302             response.reset();
303         }
304 
305 
306         // handle an redirect
307         String redirect= request.getParameter("redirect");
308         if (redirect != null && redirect.length() > 0)
309         {
310             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
311             response.sendRedirect(response.encodeRedirectURL(redirect));
312             try
313             {
314                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
315             }
316             catch(IOException e)
317             {
318                 // ignored as stream is closed.
319             }
320             return;
321         }
322 
323         // handle an error
324         String error= request.getParameter("error");
325         if (error != null && error.length() > 0 && request.getAttribute("javax.servlet.error.status_code")==null)
326         {
327             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
328             response.sendError(Integer.parseInt(error));
329             try
330             {
331                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
332             }
333             catch(IllegalStateException e)
334             {
335                 try
336                 {
337                     response.getWriter().println("NOR THIS!!");
338                 }
339                 catch(IOException e2){}
340             }
341             catch(IOException e){}
342             return;
343         }
344 
345         // Handle a extra headers
346         String headers= request.getParameter("headers");
347         if (headers != null && headers.length() > 0)
348         {
349             long h=Long.parseLong(headers);
350             for (int i=0;i<h;i++)
351                 response.addHeader("Header"+i,"Value"+i);
352         }
353 
354         String buffer= request.getParameter("buffer");
355         if (buffer != null && buffer.length() > 0)
356             response.setBufferSize(Integer.parseInt(buffer));
357 
358         String charset= request.getParameter("charset");
359         if (charset==null)
360             charset="UTF-8";
361         response.setCharacterEncoding(charset);
362         response.setContentType("text/html");
363 
364         if (info != null && info.indexOf("Locale/") >= 0)
365         {
366             try
367             {
368                 String locale_name= info.substring(info.indexOf("Locale/") + 7);
369                 Field f= java.util.Locale.class.getField(locale_name);
370                 response.setLocale((Locale)f.get(null));
371             }
372             catch (Exception e)
373             {
374                 e.printStackTrace();
375                 response.setLocale(Locale.getDefault());
376             }
377         }
378 
379         String cn= request.getParameter("cookie");
380         String cv=request.getParameter("cookiev");
381         if (cn!=null && cv!=null)
382         {
383             Cookie cookie= new Cookie(cn, cv);
384             if (request.getParameter("version")!=null)
385                 cookie.setVersion(Integer.parseInt(request.getParameter("version")));
386             cookie.setComment("Cookie from dump servlet");
387             response.addCookie(cookie);
388         }
389 
390         String pi= request.getPathInfo();
391         if (pi != null && pi.startsWith("/ex"))
392         {
393             OutputStream out= response.getOutputStream();
394             out.write("</H1>This text should be reset</H1>".getBytes());
395             if ("/ex0".equals(pi))
396                 throw new ServletException("test ex0", new Throwable());
397             else if ("/ex1".equals(pi))
398                 throw new IOException("test ex1");
399             else if ("/ex2".equals(pi))
400                 throw new UnavailableException("test ex2");
401             else if (pi.startsWith("/ex3/"))
402                 throw new UnavailableException("test ex3",Integer.parseInt(pi.substring(5)));
403             throw new RuntimeException("test");
404         }
405 
406         if ("true".equals(request.getParameter("close")))
407             response.setHeader("Connection","close");
408 
409         String buffered= request.getParameter("buffered");
410 
411         PrintWriter pout=null;
412 
413         try
414         {
415             pout =response.getWriter();
416         }
417         catch(IllegalStateException e)
418         {
419             pout=new PrintWriter(new OutputStreamWriter(response.getOutputStream(),charset));
420         }
421         if (buffered!=null)
422             pout = new PrintWriter(new BufferedWriter(pout,Integer.parseInt(buffered)));
423 
424         try
425         {
426             pout.write("<html>\n<body>\n");
427             pout.write("<h1>Dump Servlet</h1>\n");
428             pout.write("<table width=\"95%\">");
429             pout.write("<tr>\n");
430             pout.write("<th align=\"right\">getMethod:&nbsp;</th>");
431             pout.write("<td>" + notag(request.getMethod())+"</td>");
432             pout.write("</tr><tr>\n");
433             pout.write("<th align=\"right\">getContentLength:&nbsp;</th>");
434             pout.write("<td>"+Integer.toString(request.getContentLength())+"</td>");
435             pout.write("</tr><tr>\n");
436             pout.write("<th align=\"right\">getContentType:&nbsp;</th>");
437             pout.write("<td>"+notag(request.getContentType())+"</td>");
438             pout.write("</tr><tr>\n");
439             pout.write("<th align=\"right\">getRequestURI:&nbsp;</th>");
440             pout.write("<td>"+notag(request.getRequestURI())+"</td>");
441             pout.write("</tr><tr>\n");
442             pout.write("<th align=\"right\">getRequestURL:&nbsp;</th>");
443             pout.write("<td>"+notag(request.getRequestURL().toString())+"</td>");
444             pout.write("</tr><tr>\n");
445             pout.write("<th align=\"right\">getContextPath:&nbsp;</th>");
446             pout.write("<td>"+request.getContextPath()+"</td>");
447             pout.write("</tr><tr>\n");
448             pout.write("<th align=\"right\">getServletPath:&nbsp;</th>");
449             pout.write("<td>"+notag(request.getServletPath())+"</td>");
450             pout.write("</tr><tr>\n");
451             pout.write("<th align=\"right\">getPathInfo:&nbsp;</th>");
452             pout.write("<td>"+notag(request.getPathInfo())+"</td>");
453             pout.write("</tr><tr>\n");
454             pout.write("<th align=\"right\">getPathTranslated:&nbsp;</th>");
455             pout.write("<td>"+notag(request.getPathTranslated())+"</td>");
456             pout.write("</tr><tr>\n");
457             pout.write("<th align=\"right\">getQueryString:&nbsp;</th>");
458             pout.write("<td>"+notag(request.getQueryString())+"</td>");
459             pout.write("</tr><tr>\n");
460 
461             pout.write("<th align=\"right\">getProtocol:&nbsp;</th>");
462             pout.write("<td>"+request.getProtocol()+"</td>");
463             pout.write("</tr><tr>\n");
464             pout.write("<th align=\"right\">getScheme:&nbsp;</th>");
465             pout.write("<td>"+request.getScheme()+"</td>");
466             pout.write("</tr><tr>\n");
467             pout.write("<th align=\"right\">getServerName:&nbsp;</th>");
468             pout.write("<td>"+notag(request.getServerName())+"</td>");
469             pout.write("</tr><tr>\n");
470             pout.write("<th align=\"right\">getServerPort:&nbsp;</th>");
471             pout.write("<td>"+Integer.toString(request.getServerPort())+"</td>");
472             pout.write("</tr><tr>\n");
473             pout.write("<th align=\"right\">getLocalName:&nbsp;</th>");
474             pout.write("<td>"+request.getLocalName()+"</td>");
475             pout.write("</tr><tr>\n");
476             pout.write("<th align=\"right\">getLocalAddr:&nbsp;</th>");
477             pout.write("<td>"+request.getLocalAddr()+"</td>");
478             pout.write("</tr><tr>\n");
479             pout.write("<th align=\"right\">getLocalPort:&nbsp;</th>");
480             pout.write("<td>"+Integer.toString(request.getLocalPort())+"</td>");
481             pout.write("</tr><tr>\n");
482             pout.write("<th align=\"right\">getRemoteUser:&nbsp;</th>");
483             pout.write("<td>"+request.getRemoteUser()+"</td>");
484             pout.write("</tr><tr>\n");
485             pout.write("<th align=\"right\">getUserPrincipal:&nbsp;</th>");
486             pout.write("<td>"+request.getUserPrincipal()+"</td>");
487             pout.write("</tr><tr>\n");
488             pout.write("<th align=\"right\">getRemoteAddr:&nbsp;</th>");
489             pout.write("<td>"+request.getRemoteAddr()+"</td>");
490             pout.write("</tr><tr>\n");
491             pout.write("<th align=\"right\">getRemoteHost:&nbsp;</th>");
492             pout.write("<td>"+request.getRemoteHost()+"</td>");
493             pout.write("</tr><tr>\n");
494             pout.write("<th align=\"right\">getRemotePort:&nbsp;</th>");
495             pout.write("<td>"+request.getRemotePort()+"</td>");
496             pout.write("</tr><tr>\n");
497             pout.write("<th align=\"right\">getRequestedSessionId:&nbsp;</th>");
498             pout.write("<td>"+request.getRequestedSessionId()+"</td>");
499             pout.write("</tr><tr>\n");
500             pout.write("<th align=\"right\">isSecure():&nbsp;</th>");
501             pout.write("<td>"+request.isSecure()+"</td>");
502 
503             pout.write("</tr><tr>\n");
504             pout.write("<th align=\"right\">isUserInRole(admin):&nbsp;</th>");
505             pout.write("<td>"+request.isUserInRole("admin")+"</td>");
506 
507             pout.write("</tr><tr>\n");
508             pout.write("<th align=\"right\">getLocale:&nbsp;</th>");
509             pout.write("<td>"+request.getLocale()+"</td>");
510 
511             Enumeration<Locale> locales= request.getLocales();
512             while (locales.hasMoreElements())
513             {
514                 pout.write("</tr><tr>\n");
515                 pout.write("<th align=\"right\">getLocales:&nbsp;</th>");
516                 pout.write("<td>"+locales.nextElement()+"</td>");
517             }
518             pout.write("</tr><tr>\n");
519 
520             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Other HTTP Headers:</big></th>");
521             Enumeration<String> h= request.getHeaderNames();
522             String name;
523             while (h.hasMoreElements())
524             {
525                 name= (String)h.nextElement();
526 
527                 Enumeration<String> h2= request.getHeaders(name);
528                 while (h2.hasMoreElements())
529                 {
530                     String hv= (String)h2.nextElement();
531                     pout.write("</tr><tr>\n");
532                     pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
533                     pout.write("<td>"+notag(hv)+"</td>");
534                 }
535             }
536 
537             pout.write("</tr><tr>\n");
538             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Parameters:</big></th>");
539             h= request.getParameterNames();
540             while (h.hasMoreElements())
541             {
542                 name= (String)h.nextElement();
543                 pout.write("</tr><tr>\n");
544                 pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
545                 pout.write("<td>"+notag(request.getParameter(name))+"</td>");
546                 String[] values= request.getParameterValues(name);
547                 if (values == null)
548                 {
549                     pout.write("</tr><tr>\n");
550                     pout.write("<th align=\"right\">"+notag(name)+" Values:&nbsp;</th>");
551                     pout.write("<td>"+"NULL!"+"</td>");
552                 }
553                 else if (values.length > 1)
554                 {
555                     for (int i= 0; i < values.length; i++)
556                     {
557                         pout.write("</tr><tr>\n");
558                         pout.write("<th align=\"right\">"+notag(name)+"["+i+"]:&nbsp;</th>");
559                         pout.write("<td>"+notag(values[i])+"</td>");
560                     }
561                 }
562             }
563 
564             pout.write("</tr><tr>\n");
565             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Cookies:</big></th>");
566             Cookie[] cookies = request.getCookies();
567             for (int i=0; cookies!=null && i<cookies.length;i++)
568             {
569                 Cookie cookie = cookies[i];
570 
571                 pout.write("</tr><tr>\n");
572                 pout.write("<th align=\"right\">"+notag(cookie.getName())+":&nbsp;</th>");
573                 pout.write("<td>"+notag(cookie.getValue())+"</td>");
574             }
575 
576             String content_type=request.getContentType();
577             if (content_type!=null &&
578                 !content_type.startsWith("application/x-www-form-urlencoded") &&
579                 !content_type.startsWith("multipart/form-data"))
580             {
581                 pout.write("</tr><tr>\n");
582                 pout.write("<th align=\"left\" valign=\"top\" colspan=\"2\"><big><br/>Content:</big></th>");
583                 pout.write("</tr><tr>\n");
584                 pout.write("<td><pre>");
585                 char[] content= new char[4096];
586                 int len;
587                 try{
588                     Reader in=request.getReader();
589 
590                     while((len=in.read(content))>=0)
591                         pout.write(notag(new String(content,0,len)));
592                 }
593                 catch(IOException e)
594                 {
595                     pout.write(e.toString());
596                 }
597 
598                 pout.write("</pre></td>");
599             }
600 
601             pout.write("</tr><tr>\n");
602             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Attributes:</big></th>");
603             Enumeration<String> a= request.getAttributeNames();
604             while (a.hasMoreElements())
605             {
606                 name= (String)a.nextElement();
607                 pout.write("</tr><tr>\n");
608                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
609                 Object value=request.getAttribute(name);
610                 if (value instanceof File)
611                 {
612                     File file = (File)value;
613                     pout.write("<td>"+"<pre>" + file.getName()+" ("+file.length()+" "+new Date(file.lastModified())+ ")</pre>"+"</td>");
614                 }
615                 else
616                     pout.write("<td>"+"<pre>" + toString(request.getAttribute(name)) + "</pre>"+"</td>");
617             }
618             request.setAttribute("org.eclipse.jetty.servlet.MultiPartFilter.files",null);
619 
620 
621             pout.write("</tr><tr>\n");
622             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Servlet InitParameters:</big></th>");
623             a= getInitParameterNames();
624             while (a.hasMoreElements())
625             {
626                 name= (String)a.nextElement();
627                 pout.write("</tr><tr>\n");
628                 pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
629                 pout.write("<td>"+ toString(getInitParameter(name)) +"</td>");
630             }
631 
632             pout.write("</tr><tr>\n");
633             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context InitParameters:</big></th>");
634             a= getServletContext().getInitParameterNames();
635             while (a.hasMoreElements())
636             {
637                 name= (String)a.nextElement();
638                 pout.write("</tr><tr>\n");
639                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
640                 pout.write("<td>"+ toString(getServletContext().getInitParameter(name)) + "</td>");
641             }
642 
643             pout.write("</tr><tr>\n");
644             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context Attributes:</big></th>");
645             a= getServletContext().getAttributeNames();
646             while (a.hasMoreElements())
647             {
648                 name= (String)a.nextElement();
649                 pout.write("</tr><tr>\n");
650                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
651                 pout.write("<td>"+"<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>"+"</td>");
652             }
653 
654             String res= request.getParameter("resource");
655             if (res != null && res.length() > 0)
656             {
657                 pout.write("</tr><tr>\n");
658                 pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Get Resource: \""+res+"\"</big></th>");
659 
660                 pout.write("</tr><tr>\n");
661                 pout.write("<th align=\"right\">getServletContext().getResource(...):&nbsp;</th>");
662                 try{pout.write("<td>"+getServletContext().getResource(res)+"</td>");}
663                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
664 
665                 pout.write("</tr><tr>\n");
666                 pout.write("<th align=\"right\">getServletContext().getResourcePaths(...):&nbsp;</th>");
667                 try{pout.write("<td>"+getServletContext().getResourcePaths(res)+"</td>");}
668                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
669 
670                 pout.write("</tr><tr>\n");
671                 pout.write("<th align=\"right\">getServletContext().getContext(...):&nbsp;</th>");
672 
673                 ServletContext context = getServletContext().getContext(res);
674                 pout.write("<td>"+context+"</td>");
675 
676                 if (context!=null)
677                 {
678                     pout.write("</tr><tr>\n");
679                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResource(...):&nbsp;</th>");
680                     try{pout.write("<td>"+context.getResource(res)+"</td>");}
681                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
682 
683                     pout.write("</tr><tr>\n");
684                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResourcePaths(...):&nbsp;</th>");
685                     try{pout.write("<td>"+context.getResourcePaths(res)+"</td>");}
686                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
687 
688                     String cp=context.getContextPath();
689                     if (cp==null || "/".equals(cp))
690                         cp="";
691                     pout.write("</tr><tr>\n");
692                     pout.write("<th align=\"right\">getServletContext().getContext(...),getRequestDispatcher(...):&nbsp;</th>");
693                     pout.write("<td>"+getServletContext().getContext(res).getRequestDispatcher(res.substring(cp.length()))+"</td>");
694                 }
695 
696                 pout.write("</tr><tr>\n");
697                 pout.write("<th align=\"right\">this.getClass().getResource(...):&nbsp;</th>");
698                 pout.write("<td>"+this.getClass().getResource(res)+"</td>");
699 
700                 pout.write("</tr><tr>\n");
701                 pout.write("<th align=\"right\">this.getClass().getClassLoader().getResource(...):&nbsp;</th>");
702                 pout.write("<td>"+this.getClass().getClassLoader().getResource(res)+"</td>");
703 
704                 pout.write("</tr><tr>\n");
705                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResource(...):&nbsp;</th>");
706                 pout.write("<td>"+Thread.currentThread().getContextClassLoader().getResource(res)+"</td>");
707                 pout.write("</tr><tr>\n");
708                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResources(...):&nbsp;</th>");
709                 Enumeration<URL> urls = Thread.currentThread().getContextClassLoader().getResources(res);
710                 if (urls==null)
711                     pout.write("<td>null</td>");
712                 else
713                     pout.write("<td>"+Collections.list(urls)+"</td>");
714 
715             }
716 
717             pout.write("</tr></table>\n");
718 
719             /* ------------------------------------------------------------ */
720             pout.write("<h2>Request Wrappers</h2>\n");
721             ServletRequest rw=request;
722             int w=0;
723             while (rw !=null)
724             {
725                 pout.write((w++)+": "+rw.getClass().getName()+"<br/>");
726                 if (rw instanceof HttpServletRequestWrapper)
727                     rw=((HttpServletRequestWrapper)rw).getRequest();
728                 else if (rw instanceof ServletRequestWrapper)
729                     rw=((ServletRequestWrapper)rw).getRequest();
730                 else
731                     rw=null;
732             }
733 
734             /* ------------------------------------------------------------ */
735             pout.write("<h2>Response Wrappers</h2>\n");
736             ServletResponse rsw=response;
737             w=0;
738             while (rsw !=null)
739             {
740                 pout.write((w++)+": "+rsw.getClass().getName()+"<br/>");
741                 if (rsw instanceof HttpServletResponseWrapper)
742                     rsw=((HttpServletResponseWrapper)rsw).getResponse();
743                 else if (rsw instanceof ServletResponseWrapper)
744                     rsw=((ServletResponseWrapper)rsw).getResponse();
745                 else
746                     rsw=null;
747             }
748 
749             pout.write("<br/>");
750             pout.write("<h2>International Characters (UTF-8)</h2>");
751             pout.write("LATIN LETTER SMALL CAPITAL AE<br/>\n");
752             pout.write("Directly uni encoded(\\u1d01): \u1d01<br/>");
753             pout.write("HTML reference (&amp;AElig;): &AElig;<br/>");
754             pout.write("Decimal (&amp;#7425;): &#7425;<br/>");
755             pout.write("Javascript unicode (\\u1d01) : <script language='javascript'>document.write(\"\u1d01\");</script><br/>");
756             pout.write("<br/>");
757             pout.write("<h2>Form to generate GET content</h2>");
758             pout.write("<form method=\"GET\" action=\""+response.encodeURL(getURI(request))+"\">");
759             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
760             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\">");
761             pout.write("</form>");
762 
763             pout.write("<br/>");
764 
765             pout.write("<h2>Form to generate POST content</h2>");
766             pout.write("<form method=\"POST\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
767             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
768             pout.write("Select: <select multiple name=\"Select\">\n");
769             pout.write("<option>ValueA</option>");
770             pout.write("<option>ValueB1,ValueB2</option>");
771             pout.write("<option>ValueC</option>");
772             pout.write("</select><br/>");
773             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
774             pout.write("</form>");
775             pout.write("<br/>");
776 
777             pout.write("<h2>Form to generate UPLOAD content</h2>");
778             pout.write("<form method=\"POST\" enctype=\"multipart/form-data\" accept-charset=\"utf-8\" action=\""+
779                     response.encodeURL(getURI(request))+(request.getQueryString()==null?"":("?"+request.getQueryString()))+
780                     "\">");
781             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"comment\"/><br/>\n");
782             pout.write("File 1: <input type=\"file\" name=\"file1\" /><br/>\n");
783             pout.write("File 2: <input type=\"file\" name=\"file2\" /><br/>\n");
784             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
785             pout.write("</form>");
786 
787             pout.write("<h2>Form to set Cookie</h2>");
788             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
789             pout.write("cookie: <input type=\"text\" name=\"cookie\" /><br/>\n");
790             pout.write("value: <input type=\"text\" name=\"cookiev\" /><br/>\n");
791             pout.write("<input type=\"submit\" name=\"Action\" value=\"setCookie\">");
792             pout.write("</form>\n");
793 
794             pout.write("<h2>Form to get Resource</h2>");
795             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
796             pout.write("resource: <input type=\"text\" name=\"resource\" /><br/>\n");
797             pout.write("<input type=\"submit\" name=\"Action\" value=\"getResource\">");
798             pout.write("</form>\n");
799         }
800         catch (Exception e)
801         {
802             getServletContext().log("dump "+e);
803         }
804 
805         String lines= request.getParameter("lines");
806         if (lines!=null)
807         {
808             char[] line = "<span>A line of characters. Blah blah blah blah.  blooble blooble</span></br>\n".toCharArray();
809             for (int l=Integer.parseInt(lines);l-->0;)
810             {
811                 pout.write("<span>"+l+" </span>");
812                 pout.write(line);
813             }
814         }
815 
816         pout.write("</body>\n</html>\n");
817 
818         pout.close();
819 
820         if (pi != null)
821         {
822             if ("/ex4".equals(pi))
823                 throw new ServletException("test ex4", new Throwable());
824             if ("/ex5".equals(pi))
825                 throw new IOException("test ex5");
826             if ("/ex6".equals(pi))
827                 throw new UnavailableException("test ex6");
828         }
829 
830 
831     }
832 
833 
834     /* ------------------------------------------------------------ */
835     @Override
836     public String getServletInfo()
837     {
838         return "Dump Servlet";
839     }
840 
841     /* ------------------------------------------------------------ */
842     @Override
843     public synchronized void destroy()
844     {
845         _timer.cancel();
846     }
847 
848     /* ------------------------------------------------------------ */
849     private String getURI(HttpServletRequest request)
850     {
851         String uri= (String)request.getAttribute("javax.servlet.forward.request_uri");
852         if (uri == null)
853             uri= request.getRequestURI();
854         return uri;
855     }
856 
857     /* ------------------------------------------------------------ */
858     private static String toString(Object o)
859     {
860         if (o == null)
861             return null;
862 
863         try
864         {
865             if (o.getClass().isArray())
866             {
867                 StringBuffer sb = new StringBuffer();
868                 if (!o.getClass().getComponentType().isPrimitive())
869                 {
870                     Object[] array= (Object[])o;
871                     for (int i= 0; i < array.length; i++)
872                     {
873                         if (i > 0)
874                             sb.append("\n");
875                         sb.append(array.getClass().getComponentType().getName());
876                         sb.append("[");
877                         sb.append(i);
878                         sb.append("]=");
879                         sb.append(toString(array[i]));
880                     }
881                     return sb.toString();
882                 }
883                 else
884                 {
885                     int length = Array.getLength(o);
886                     for (int i=0;i<length;i++)
887                     {
888                         if (i > 0)
889                             sb.append("\n");
890                         sb.append(o.getClass().getComponentType().getName());
891                         sb.append("[");
892                         sb.append(i);
893                         sb.append("]=");
894                         sb.append(toString(Array.get(o, i)));
895                     }
896                     return sb.toString();
897                 }
898             }
899             else
900                 return o.toString();
901         }
902         catch (Exception e)
903         {
904             return e.toString();
905         }
906     }
907 
908     private boolean dump(HttpServletResponse response, String data, String chars, String block, String dribble, boolean flush) throws IOException
909     {
910         if (data != null && data.length() > 0)
911         {
912             long d=Long.parseLong(data);
913             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
914             byte[] buf=new byte[b];
915             for (int i=0;i<b;i++)
916             {
917 
918                 buf[i]=(byte)('0'+(i%10));
919                 if (i%10==9)
920                     buf[i]=(byte)'\n';
921             }
922             buf[0]='o';
923             OutputStream out=response.getOutputStream();
924             response.setContentType("text/plain");
925             while (d > 0)
926             {
927                 if (b==1)
928                 {
929                     out.write(d%80==0?'\n':'.');
930                     d--;
931                 }
932                 else if (d>=b)
933                 {
934                     out.write(buf);
935                     d=d-b;
936                 }
937                 else
938                 {
939                     out.write(buf,0,(int)d);
940                     d=0;
941                 }
942 
943                 if (dribble!=null)
944                 {
945                     out.flush();
946                     try
947                     {
948                         Thread.sleep(Long.parseLong(dribble));
949                     }
950                     catch (Exception e)
951                     {
952                         e.printStackTrace();
953                         break;
954                     }
955                 }
956 
957             }
958 
959             if (flush)
960                 out.flush();
961 
962             return true;
963         }
964 
965         // Handle a dump of data
966         if (chars != null && chars.length() > 0)
967         {
968             long d=Long.parseLong(chars);
969             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
970             char[] buf=new char[b];
971             for (int i=0;i<b;i++)
972             {
973                 buf[i]=(char)('0'+(i%10));
974                 if (i%10==9)
975                     buf[i]='\n';
976             }
977             buf[0]='o';
978             response.setContentType("text/plain");
979             PrintWriter out=response.getWriter();
980             while (d > 0 && !out.checkError())
981             {
982                 if (b==1)
983                 {
984                     out.write(d%80==0?'\n':'.');
985                     d--;
986                 }
987                 else if (d>=b)
988                 {
989                     out.write(buf);
990                     d=d-b;
991                 }
992                 else
993                 {
994                     out.write(buf,0,(int)d);
995                     d=0;
996                 }
997             }
998             return true;
999         }
1000         return false;
1001     }
1002 
1003     private String notag(String s)
1004     {
1005         if (s==null)
1006             return "null";
1007         s=StringUtil.replace(s,"&","&amp;");
1008         s=StringUtil.replace(s,"<","&lt;");
1009         s=StringUtil.replace(s,">","&gt;");
1010         return s;
1011     }
1012 }