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1   // ========================================================================
2   // Copyright (c) 1996-2009 Mort Bay Consulting Pty. Ltd.
3   // ------------------------------------------------------------------------
4   // All rights reserved. This program and the accompanying materials
5   // are made available under the terms of the Eclipse Public License v1.0
6   // and Apache License v2.0 which accompanies this distribution.
7   // The Eclipse Public License is available at 
8   // http://www.eclipse.org/legal/epl-v10.html
9   // The Apache License v2.0 is available at
10  // http://www.opensource.org/licenses/apache2.0.php
11  // You may elect to redistribute this code under either of these licenses. 
12  // ========================================================================
13  
14  package com.acme;
15  import java.io.BufferedWriter;
16  import java.io.File;
17  import java.io.IOException;
18  import java.io.InputStream;
19  import java.io.OutputStream;
20  import java.io.OutputStreamWriter;
21  import java.io.PrintWriter;
22  import java.io.Reader;
23  import java.lang.reflect.Array;
24  import java.lang.reflect.Field;
25  import java.net.URL;
26  import java.util.Collections;
27  import java.util.Collection;
28  import java.util.Date;
29  import java.util.Enumeration;
30  import java.util.Locale;
31  import java.util.Timer;
32  import java.util.TimerTask;
33  
34  import javax.servlet.ServletConfig;
35  import javax.servlet.ServletContext;
36  import javax.servlet.ServletException;
37  import javax.servlet.ServletRequest;
38  import javax.servlet.ServletRequestWrapper;
39  import javax.servlet.ServletResponse;
40  import javax.servlet.ServletResponseWrapper;
41  import javax.servlet.UnavailableException;
42  import javax.servlet.http.Cookie;
43  import javax.servlet.http.HttpServlet;
44  import javax.servlet.http.HttpServletRequest;
45  import javax.servlet.http.HttpServletRequestWrapper;
46  import javax.servlet.http.HttpServletResponse;
47  import javax.servlet.http.HttpServletResponseWrapper;
48  
49  import org.eclipse.jetty.continuation.Continuation;
50  import org.eclipse.jetty.continuation.ContinuationListener;
51  import org.eclipse.jetty.continuation.ContinuationSupport;
52  import org.eclipse.jetty.http.HttpHeaders;
53  import org.eclipse.jetty.util.IO;
54  import org.eclipse.jetty.util.StringUtil;
55  import org.eclipse.jetty.util.log.Log;
56  import org.eclipse.jetty.util.log.Logger;
57  
58  
59  
60  /* ------------------------------------------------------------ */
61  /** Dump Servlet Request.
62   * 
63   */
64  public class Dump extends HttpServlet
65  {
66      private static final Logger LOG = Log.getLogger(Dump.class);
67  
68      boolean fixed;
69      Timer _timer;
70      
71      /* ------------------------------------------------------------ */
72      @Override
73      public void init(ServletConfig config) throws ServletException
74      {
75      	super.init(config);
76      	
77      	if (config.getInitParameter("unavailable")!=null && !fixed)
78      	{
79      	    
80      	    fixed=true;
81      	    throw new UnavailableException("Unavailable test",Integer.parseInt(config.getInitParameter("unavailable")));
82      	}
83      	
84      	_timer=new Timer(true);
85      }
86  
87      /* ------------------------------------------------------------ */
88      @Override
89      public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
90      {
91          doGet(request, response);
92      }
93  
94      /* ------------------------------------------------------------ */
95      @Override
96      public void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
97      {
98          byte[] buffer = new byte[8192];
99          int len=request.getContentLength();
100         int c=0;
101         InputStream in=request.getInputStream();
102         while (c<len)
103         {
104             int l = in.read(buffer);
105             if (l<0)
106                 break;
107             c+=l;
108         }
109         request.setAttribute("PUT",c+"bytes");
110         doGet(request, response);
111     }
112 
113     /* ------------------------------------------------------------ */
114     @Override
115     public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException
116     {
117         // Handle a dump of data
118         final String data= request.getParameter("data");
119         final String chars= request.getParameter("chars");
120         final String block= request.getParameter("block");
121         final String dribble= request.getParameter("dribble");
122         final boolean flush= request.getParameter("flush")!=null?Boolean.parseBoolean(request.getParameter("flush")):false;
123 
124         
125         if(request.getPathInfo()!=null && request.getPathInfo().toLowerCase().indexOf("script")!=-1)
126         {
127             response.sendRedirect(response.encodeRedirectURL(getServletContext().getContextPath() + "/dump/info"));
128             return;
129         }
130             
131         request.setCharacterEncoding("UTF-8");
132         
133         if (request.getParameter("busy")!=null)
134         {
135             long end = System.currentTimeMillis()+Long.parseLong(request.getParameter("busy"));
136             while(System.currentTimeMillis()<end)
137             {}
138         }
139         
140         if (request.getParameter("empty")!=null)
141         {
142             response.setStatus(200);
143             response.flushBuffer();
144             return;
145         }
146         
147         if (request.getParameter("sleep")!=null)
148         {
149             try
150             {
151                 long s = Long.parseLong(request.getParameter("sleep"));
152                 if (request.getHeader(HttpHeaders.EXPECT)!=null &&request.getHeader(HttpHeaders.EXPECT).indexOf("102")>=0)
153                 {
154                     Thread.sleep(s/2);
155                     response.sendError(102);
156                     Thread.sleep(s/2);
157                 }
158                 else
159                     Thread.sleep(s);
160             }
161             catch (InterruptedException e)
162             {
163                 return;
164             }
165             catch (Exception e)
166             {
167                 throw new ServletException(e);
168             }
169         }
170 
171         if (request.getAttribute("RESUME")==null && request.getParameter("resume")!=null)
172         {
173             request.setAttribute("RESUME",Boolean.TRUE);
174 
175             final long resume=Long.parseLong(request.getParameter("resume"));
176             final Continuation continuation = ContinuationSupport.getContinuation(request);
177             _timer.schedule(new TimerTask()
178             {
179                 @Override
180                 public void run()
181                 {
182                     continuation.resume();
183                 }
184             },resume);
185   
186         }
187 
188         if (request.getParameter("complete")!=null)
189         {
190             final long complete=Long.parseLong(request.getParameter("complete"));
191             _timer.schedule(new TimerTask()
192             {
193                 @Override
194                 public void run()
195                 {
196                     try
197                     {
198                         response.setContentType("text/html");
199                         response.getOutputStream().println("<h1>COMPLETED</h1>"); 
200                         Continuation continuation = ContinuationSupport.getContinuation(request);
201                         continuation.complete();
202                     }
203                     catch(Exception e)
204                     {
205                         e.printStackTrace();
206                     }
207                 }
208             },complete);
209         }
210         
211         if (request.getParameter("suspend")!=null && request.getAttribute("SUSPEND")!=Boolean.TRUE)
212         {
213             request.setAttribute("SUSPEND",Boolean.TRUE);
214             try
215             {
216                 Continuation continuation = ContinuationSupport.getContinuation(request);
217                 continuation.setTimeout(Long.parseLong(request.getParameter("suspend")));
218                 continuation.suspend();
219                 
220                 continuation.addContinuationListener(new ContinuationListener()
221                 {   
222                     public void onTimeout(Continuation continuation)
223                     {
224                         response.addHeader("Dump","onTimeout");
225                         try
226                         {
227                             if (!dump(response,data,chars,block,dribble,flush))
228                             {
229                                 response.setContentType("text/plain");
230                                 response.getOutputStream().println("EXPIRED");
231                             }
232                             continuation.complete();
233                         }
234                         catch (IOException e)
235                         {
236                             LOG.ignore(e);
237                         }
238                     }
239                     
240                     public void onComplete(Continuation continuation)
241                     {
242                         response.addHeader("Dump","onComplete");
243                     }
244                 });
245                 
246                 continuation.undispatch();
247             }
248             catch(Exception e)
249             {
250                 throw new ServletException(e);
251             }
252         }        
253             
254         request.setAttribute("Dump", this);
255         getServletContext().setAttribute("Dump",this);
256         // getServletContext().log("dump "+request.getRequestURI());
257 
258         // Force a content length response
259         String length= request.getParameter("length");
260         if (length != null && length.length() > 0)
261         {
262             response.setContentLength(Integer.parseInt(length));
263         }
264 
265         // Handle a dump of data
266         if (dump(response,data,chars,block,dribble,flush))
267             return;
268         
269         // handle an exception
270         String info= request.getPathInfo();
271         if (info != null && info.endsWith("Exception"))
272         {
273             try
274             {
275                 throw (Throwable) Thread.currentThread().getContextClassLoader().loadClass(info.substring(1)).newInstance();
276             }
277             catch (Throwable th)
278             {
279                 throw new ServletException(th);
280             }
281         }
282 
283         // test a reset
284         String reset= request.getParameter("reset");
285         if (reset != null && reset.length() > 0)
286         {
287             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
288             response.setHeader("SHOULD_NOT","BE SEEN");
289             response.reset();
290         }
291         
292         
293         // handle an redirect
294         String redirect= request.getParameter("redirect");
295         if (redirect != null && redirect.length() > 0)
296         {
297             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
298             response.sendRedirect(response.encodeRedirectURL(redirect));
299             try
300             {
301                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
302             }
303             catch(IOException e)
304             {
305                 // ignored as stream is closed.
306             }
307             return;
308         }
309 
310         // handle an error
311         String error= request.getParameter("error");
312         if (error != null && error.length() > 0 && request.getAttribute("javax.servlet.error.status_code")==null)
313         {
314             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
315             response.sendError(Integer.parseInt(error));
316             try
317             {
318                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
319             }
320             catch(IllegalStateException e)
321             {
322                 try
323                 {
324                     response.getWriter().println("NOR THIS!!"); 
325                 }
326                 catch(IOException e2){}
327             }
328             catch(IOException e){}
329             return;
330         }
331 
332         // Handle a extra headers 
333         String headers= request.getParameter("headers");
334         if (headers != null && headers.length() > 0)
335         {
336             long h=Long.parseLong(headers);
337             for (int i=0;i<h;i++)
338                 response.addHeader("Header"+i,"Value"+i);
339         }
340 
341         String buffer= request.getParameter("buffer");
342         if (buffer != null && buffer.length() > 0)
343             response.setBufferSize(Integer.parseInt(buffer));
344 
345         String charset= request.getParameter("charset");
346         if (charset==null)
347             charset="UTF-8";
348         response.setCharacterEncoding(charset);
349         response.setContentType("text/html");
350 
351         if (info != null && info.indexOf("Locale/") >= 0)
352         {
353             try
354             {
355                 String locale_name= info.substring(info.indexOf("Locale/") + 7);
356                 Field f= java.util.Locale.class.getField(locale_name);
357                 response.setLocale((Locale)f.get(null));
358             }
359             catch (Exception e)
360             {
361                 e.printStackTrace();
362                 response.setLocale(Locale.getDefault());
363             }
364         }
365 
366         String cn= request.getParameter("cookie");
367         String cv=request.getParameter("cookiev");
368         if (cn!=null && cv!=null)
369         {
370             Cookie cookie= new Cookie(cn, cv);
371             if (request.getParameter("version")!=null)
372                 cookie.setVersion(Integer.parseInt(request.getParameter("version")));
373             cookie.setComment("Cookie from dump servlet");
374             response.addCookie(cookie);
375         }
376 
377         String pi= request.getPathInfo();
378         if (pi != null && pi.startsWith("/ex"))
379         {
380             OutputStream out= response.getOutputStream();
381             out.write("</H1>This text should be reset</H1>".getBytes());
382             if ("/ex0".equals(pi))
383                 throw new ServletException("test ex0", new Throwable());
384             else if ("/ex1".equals(pi))
385                 throw new IOException("test ex1");
386             else if ("/ex2".equals(pi))
387                 throw new UnavailableException("test ex2");
388             else if (pi.startsWith("/ex3/"))
389                 throw new UnavailableException("test ex3",Integer.parseInt(pi.substring(5)));
390             throw new RuntimeException("test");
391         }
392 
393         if ("true".equals(request.getParameter("close")))
394             response.setHeader("Connection","close");
395 
396         String buffered= request.getParameter("buffered");
397         
398         PrintWriter pout=null;
399         
400         try
401         {
402             pout =response.getWriter();
403         }
404         catch(IllegalStateException e)
405         {
406             pout=new PrintWriter(new OutputStreamWriter(response.getOutputStream(),charset));
407         }
408         if (buffered!=null)
409             pout = new PrintWriter(new BufferedWriter(pout,Integer.parseInt(buffered)));
410         
411         try
412         {
413             pout.write("<html>\n<body>\n");
414             pout.write("<h1>Dump Servlet</h1>\n");
415             pout.write("<table width=\"95%\">");
416             pout.write("<tr>\n");
417             pout.write("<th align=\"right\">getMethod:&nbsp;</th>");
418             pout.write("<td>" + notag(request.getMethod())+"</td>");
419             pout.write("</tr><tr>\n");
420             pout.write("<th align=\"right\">getContentLength:&nbsp;</th>");
421             pout.write("<td>"+Integer.toString(request.getContentLength())+"</td>");
422             pout.write("</tr><tr>\n");
423             pout.write("<th align=\"right\">getContentType:&nbsp;</th>");
424             pout.write("<td>"+notag(request.getContentType())+"</td>");
425             pout.write("</tr><tr>\n");
426             pout.write("<th align=\"right\">getRequestURI:&nbsp;</th>");
427             pout.write("<td>"+notag(request.getRequestURI())+"</td>");
428             pout.write("</tr><tr>\n");
429             pout.write("<th align=\"right\">getRequestURL:&nbsp;</th>");
430             pout.write("<td>"+notag(request.getRequestURL().toString())+"</td>");
431             pout.write("</tr><tr>\n");
432             pout.write("<th align=\"right\">getContextPath:&nbsp;</th>");
433             pout.write("<td>"+request.getContextPath()+"</td>");
434             pout.write("</tr><tr>\n");
435             pout.write("<th align=\"right\">getServletPath:&nbsp;</th>");
436             pout.write("<td>"+notag(request.getServletPath())+"</td>");
437             pout.write("</tr><tr>\n");
438             pout.write("<th align=\"right\">getPathInfo:&nbsp;</th>");
439             pout.write("<td>"+notag(request.getPathInfo())+"</td>");
440             pout.write("</tr><tr>\n");
441             pout.write("<th align=\"right\">getPathTranslated:&nbsp;</th>");
442             pout.write("<td>"+notag(request.getPathTranslated())+"</td>");
443             pout.write("</tr><tr>\n");
444             pout.write("<th align=\"right\">getQueryString:&nbsp;</th>");
445             pout.write("<td>"+notag(request.getQueryString())+"</td>");
446             pout.write("</tr><tr>\n");
447             
448             pout.write("<th align=\"right\">getProtocol:&nbsp;</th>");
449             pout.write("<td>"+request.getProtocol()+"</td>");
450             pout.write("</tr><tr>\n");
451             pout.write("<th align=\"right\">getScheme:&nbsp;</th>");
452             pout.write("<td>"+request.getScheme()+"</td>");
453             pout.write("</tr><tr>\n");
454             pout.write("<th align=\"right\">getServerName:&nbsp;</th>");
455             pout.write("<td>"+notag(request.getServerName())+"</td>");
456             pout.write("</tr><tr>\n");
457             pout.write("<th align=\"right\">getServerPort:&nbsp;</th>");
458             pout.write("<td>"+Integer.toString(request.getServerPort())+"</td>");
459             pout.write("</tr><tr>\n");
460             pout.write("<th align=\"right\">getLocalName:&nbsp;</th>");
461             pout.write("<td>"+request.getLocalName()+"</td>");
462             pout.write("</tr><tr>\n");
463             pout.write("<th align=\"right\">getLocalAddr:&nbsp;</th>");
464             pout.write("<td>"+request.getLocalAddr()+"</td>");
465             pout.write("</tr><tr>\n");
466             pout.write("<th align=\"right\">getLocalPort:&nbsp;</th>");
467             pout.write("<td>"+Integer.toString(request.getLocalPort())+"</td>");
468             pout.write("</tr><tr>\n");
469             pout.write("<th align=\"right\">getRemoteUser:&nbsp;</th>");
470             pout.write("<td>"+request.getRemoteUser()+"</td>");
471             pout.write("</tr><tr>\n");
472             pout.write("<th align=\"right\">getUserPrincipal:&nbsp;</th>");
473             pout.write("<td>"+request.getUserPrincipal()+"</td>");
474             pout.write("</tr><tr>\n");
475             pout.write("<th align=\"right\">getRemoteAddr:&nbsp;</th>");
476             pout.write("<td>"+request.getRemoteAddr()+"</td>");
477             pout.write("</tr><tr>\n");
478             pout.write("<th align=\"right\">getRemoteHost:&nbsp;</th>");
479             pout.write("<td>"+request.getRemoteHost()+"</td>");
480             pout.write("</tr><tr>\n");
481             pout.write("<th align=\"right\">getRemotePort:&nbsp;</th>");
482             pout.write("<td>"+request.getRemotePort()+"</td>");
483             pout.write("</tr><tr>\n");
484             pout.write("<th align=\"right\">getRequestedSessionId:&nbsp;</th>");
485             pout.write("<td>"+request.getRequestedSessionId()+"</td>");
486             pout.write("</tr><tr>\n");
487             pout.write("<th align=\"right\">isSecure():&nbsp;</th>");
488             pout.write("<td>"+request.isSecure()+"</td>");
489 
490             pout.write("</tr><tr>\n");
491             pout.write("<th align=\"right\">isUserInRole(admin):&nbsp;</th>");
492             pout.write("<td>"+request.isUserInRole("admin")+"</td>");
493 
494             pout.write("</tr><tr>\n");
495             pout.write("<th align=\"right\">getLocale:&nbsp;</th>");
496             pout.write("<td>"+request.getLocale()+"</td>");
497             
498             Enumeration locales= request.getLocales();
499             while (locales.hasMoreElements())
500             {
501                 pout.write("</tr><tr>\n");
502                 pout.write("<th align=\"right\">getLocales:&nbsp;</th>");
503                 pout.write("<td>"+locales.nextElement()+"</td>");
504             }
505             pout.write("</tr><tr>\n");
506             
507             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Other HTTP Headers:</big></th>");
508             Enumeration h= request.getHeaderNames();
509             String name;
510             while (h.hasMoreElements())
511             {
512                 name= (String)h.nextElement();
513 
514                 Enumeration h2= request.getHeaders(name);
515                 while (h2.hasMoreElements())
516                 {
517                     String hv= (String)h2.nextElement();
518                     pout.write("</tr><tr>\n");
519                     pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
520                     pout.write("<td>"+notag(hv)+"</td>");
521                 }
522             }
523 
524             pout.write("</tr><tr>\n");
525             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Parameters:</big></th>");
526             h= request.getParameterNames();
527             while (h.hasMoreElements())
528             {
529                 name= (String)h.nextElement();
530                 pout.write("</tr><tr>\n");
531                 pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
532                 pout.write("<td>"+notag(request.getParameter(name))+"</td>");
533                 String[] values= request.getParameterValues(name);
534                 if (values == null)
535                 {
536                     pout.write("</tr><tr>\n");
537                     pout.write("<th align=\"right\">"+notag(name)+" Values:&nbsp;</th>");
538                     pout.write("<td>"+"NULL!"+"</td>");
539                 }
540                 else if (values.length > 1)
541                 {
542                     for (int i= 0; i < values.length; i++)
543                     {
544                         pout.write("</tr><tr>\n");
545                         pout.write("<th align=\"right\">"+notag(name)+"["+i+"]:&nbsp;</th>");
546                         pout.write("<td>"+notag(values[i])+"</td>");
547                     }
548                 }
549             }
550 
551             pout.write("</tr><tr>\n");
552             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Cookies:</big></th>");
553             Cookie[] cookies = request.getCookies();
554             for (int i=0; cookies!=null && i<cookies.length;i++)
555             {
556                 Cookie cookie = cookies[i];
557 
558                 pout.write("</tr><tr>\n");
559                 pout.write("<th align=\"right\">"+notag(cookie.getName())+":&nbsp;</th>");
560                 pout.write("<td>"+notag(cookie.getValue())+"</td>");
561             }
562             
563             String content_type=request.getContentType();
564             if (content_type!=null &&
565                 !content_type.startsWith("application/x-www-form-urlencoded") &&
566                 !content_type.startsWith("multipart/form-data"))
567             {
568                 pout.write("</tr><tr>\n");
569                 pout.write("<th align=\"left\" valign=\"top\" colspan=\"2\"><big><br/>Content:</big></th>");
570                 pout.write("</tr><tr>\n");
571                 pout.write("<td><pre>");
572                 char[] content= new char[4096];
573                 int len;
574                 try{
575                     Reader in=request.getReader();
576                     
577                     while((len=in.read(content))>=0)
578                         pout.write(notag(new String(content,0,len)));
579                 }
580                 catch(IOException e)
581                 {
582                     pout.write(e.toString());
583                 }
584                 
585                 pout.write("</pre></td>");
586             }
587             
588             pout.write("</tr><tr>\n");
589             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Attributes:</big></th>");
590             Enumeration a= request.getAttributeNames();
591             while (a.hasMoreElements())
592             {
593                 name= (String)a.nextElement();
594                 pout.write("</tr><tr>\n");
595                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
596                 Object value=request.getAttribute(name);
597                 if (value instanceof File)
598                 {
599                     File file = (File)value;
600                     pout.write("<td>"+"<pre>" + file.getName()+" ("+file.length()+" "+new Date(file.lastModified())+ ")</pre>"+"</td>");
601                 }
602                 else
603                     pout.write("<td>"+"<pre>" + toString(request.getAttribute(name)) + "</pre>"+"</td>");
604             }
605             request.setAttribute("org.eclipse.jetty.servlet.MultiPartFilter.files",null);
606 
607             
608             pout.write("</tr><tr>\n");
609             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Servlet InitParameters:</big></th>");
610             a= getInitParameterNames();
611             while (a.hasMoreElements())
612             {
613                 name= (String)a.nextElement();
614                 pout.write("</tr><tr>\n");
615                 pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
616                 pout.write("<td>"+ toString(getInitParameter(name)) +"</td>");
617             }
618 
619             pout.write("</tr><tr>\n");
620             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context InitParameters:</big></th>");
621             a= getServletContext().getInitParameterNames();
622             while (a.hasMoreElements())
623             {
624                 name= (String)a.nextElement();
625                 pout.write("</tr><tr>\n");
626                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
627                 pout.write("<td>"+ toString(getServletContext().getInitParameter(name)) + "</td>");
628             }
629 
630             pout.write("</tr><tr>\n");
631             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context Attributes:</big></th>");
632             a= getServletContext().getAttributeNames();
633             while (a.hasMoreElements())
634             {
635                 name= (String)a.nextElement();
636                 pout.write("</tr><tr>\n");
637                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
638                 pout.write("<td>"+"<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>"+"</td>");
639             }
640 
641             String res= request.getParameter("resource");
642             if (res != null && res.length() > 0)
643             {
644                 pout.write("</tr><tr>\n");
645                 pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Get Resource: \""+res+"\"</big></th>");
646 
647                 pout.write("</tr><tr>\n");
648                 pout.write("<th align=\"right\">getServletContext().getResource(...):&nbsp;</th>");
649                 try{pout.write("<td>"+getServletContext().getResource(res)+"</td>");}
650                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
651                 
652                 pout.write("</tr><tr>\n");
653                 pout.write("<th align=\"right\">getServletContext().getResourcePaths(...):&nbsp;</th>");
654                 try{pout.write("<td>"+getServletContext().getResourcePaths(res)+"</td>");}
655                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
656                 
657                 pout.write("</tr><tr>\n");
658                 pout.write("<th align=\"right\">getServletContext().getContext(...):&nbsp;</th>");
659                 
660                 ServletContext context = getServletContext().getContext(res);
661                 pout.write("<td>"+context+"</td>");
662                 
663                 if (context!=null)
664                 {
665                     pout.write("</tr><tr>\n");
666                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResource(...):&nbsp;</th>");
667                     try{pout.write("<td>"+context.getResource(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(...).getResourcePaths(...):&nbsp;</th>");
672                     try{pout.write("<td>"+context.getResourcePaths(res)+"</td>");}
673                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
674                     
675                     String cp=context.getContextPath();
676                     if (cp==null || "/".equals(cp))
677                         cp="";
678                     pout.write("</tr><tr>\n");
679                     pout.write("<th align=\"right\">getServletContext().getContext(...),getRequestDispatcher(...):&nbsp;</th>");
680                     pout.write("<td>"+getServletContext().getContext(res).getRequestDispatcher(res.substring(cp.length()))+"</td>");
681                 }
682 
683                 pout.write("</tr><tr>\n");
684                 pout.write("<th align=\"right\">this.getClass().getResource(...):&nbsp;</th>");
685                 pout.write("<td>"+this.getClass().getResource(res)+"</td>");
686 
687                 pout.write("</tr><tr>\n");
688                 pout.write("<th align=\"right\">this.getClass().getClassLoader().getResource(...):&nbsp;</th>");
689                 pout.write("<td>"+this.getClass().getClassLoader().getResource(res)+"</td>");
690 
691                 pout.write("</tr><tr>\n");
692                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResource(...):&nbsp;</th>");
693                 pout.write("<td>"+Thread.currentThread().getContextClassLoader().getResource(res)+"</td>");
694                 pout.write("</tr><tr>\n");
695                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResources(...):&nbsp;</th>");
696                 Enumeration<URL> urls = Thread.currentThread().getContextClassLoader().getResources(res);
697                 if (urls==null)
698                     pout.write("<td>null</td>");
699                 else
700                     pout.write("<td>"+Collections.list(urls)+"</td>");
701 
702             }
703             
704             pout.write("</tr></table>\n");
705 
706             /* ------------------------------------------------------------ */
707             pout.write("<h2>Request Wrappers</h2>\n");
708             ServletRequest rw=request;
709             int w=0;
710             while (rw !=null)
711             {
712                 pout.write((w++)+": "+rw.getClass().getName()+"<br/>");
713                 if (rw instanceof HttpServletRequestWrapper)
714                     rw=((HttpServletRequestWrapper)rw).getRequest();
715                 else if (rw instanceof ServletRequestWrapper)
716                     rw=((ServletRequestWrapper)rw).getRequest();
717                 else
718                     rw=null;
719             }
720 
721             /* ------------------------------------------------------------ */
722             pout.write("<h2>Response Wrappers</h2>\n");
723             ServletResponse rsw=response;
724             w=0;
725             while (rsw !=null)
726             {
727                 pout.write((w++)+": "+rsw.getClass().getName()+"<br/>");
728                 if (rsw instanceof HttpServletResponseWrapper)
729                     rsw=((HttpServletResponseWrapper)rsw).getResponse();
730                 else if (rsw instanceof ServletResponseWrapper)
731                     rsw=((ServletResponseWrapper)rsw).getResponse();
732                 else
733                     rsw=null;
734             }
735             
736             pout.write("<br/>");
737             pout.write("<h2>International Characters (UTF-8)</h2>");
738             pout.write("LATIN LETTER SMALL CAPITAL AE<br/>\n");
739             pout.write("Directly uni encoded(\\u1d01): \u1d01<br/>");
740             pout.write("HTML reference (&amp;AElig;): &AElig;<br/>");
741             pout.write("Decimal (&amp;#7425;): &#7425;<br/>");
742             pout.write("Javascript unicode (\\u1d01) : <script language='javascript'>document.write(\"\u1d01\");</script><br/>");
743             pout.write("<br/>");
744             pout.write("<h2>Form to generate GET content</h2>");
745             pout.write("<form method=\"GET\" action=\""+response.encodeURL(getURI(request))+"\">");
746             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
747             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\">");
748             pout.write("</form>");
749 
750             pout.write("<br/>");
751             
752             pout.write("<h2>Form to generate POST content</h2>");
753             pout.write("<form method=\"POST\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
754             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
755             pout.write("Select: <select multiple name=\"Select\">\n");
756             pout.write("<option>ValueA</option>");
757             pout.write("<option>ValueB1,ValueB2</option>");
758             pout.write("<option>ValueC</option>");
759             pout.write("</select><br/>");
760             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
761             pout.write("</form>");
762             pout.write("<br/>");
763             
764             pout.write("<h2>Form to generate UPLOAD content</h2>");
765             pout.write("<form method=\"POST\" enctype=\"multipart/form-data\" accept-charset=\"utf-8\" action=\""+
766                     response.encodeURL(getURI(request))+(request.getQueryString()==null?"":("?"+request.getQueryString()))+
767                     "\">");
768             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"comment\"/><br/>\n");
769             pout.write("File 1: <input type=\"file\" name=\"file1\" /><br/>\n");
770             pout.write("File 2: <input type=\"file\" name=\"file2\" /><br/>\n");
771             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
772             pout.write("</form>");
773 
774             pout.write("<h2>Form to set Cookie</h2>");
775             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
776             pout.write("cookie: <input type=\"text\" name=\"cookie\" /><br/>\n");
777             pout.write("value: <input type=\"text\" name=\"cookiev\" /><br/>\n");
778             pout.write("<input type=\"submit\" name=\"Action\" value=\"setCookie\">");
779             pout.write("</form>\n");
780             
781             pout.write("<h2>Form to get Resource</h2>");
782             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
783             pout.write("resource: <input type=\"text\" name=\"resource\" /><br/>\n");
784             pout.write("<input type=\"submit\" name=\"Action\" value=\"getResource\">");
785             pout.write("</form>\n");
786         }
787         catch (Exception e)
788         {
789             getServletContext().log("dump "+e);
790         }
791         
792         String lines= request.getParameter("lines");
793         if (lines!=null)
794         {
795             char[] line = "<span>A line of characters. Blah blah blah blah.  blooble blooble</span></br>\n".toCharArray();
796             for (int l=Integer.parseInt(lines);l-->0;)
797             {
798                 pout.write("<span>"+l+" </span>");
799                 pout.write(line);
800             }
801         }
802         
803         pout.write("</body>\n</html>\n");
804         
805         pout.close();
806 
807         if (pi != null)
808         {
809             if ("/ex4".equals(pi))
810                 throw new ServletException("test ex4", new Throwable());
811             if ("/ex5".equals(pi))
812                 throw new IOException("test ex5");
813             if ("/ex6".equals(pi))
814                 throw new UnavailableException("test ex6");
815         }
816 
817 
818     }
819 
820 
821     /* ------------------------------------------------------------ */
822     @Override
823     public String getServletInfo()
824     {
825         return "Dump Servlet";
826     }
827 
828     /* ------------------------------------------------------------ */
829     @Override
830     public synchronized void destroy()
831     {
832         _timer.cancel();
833     }
834 
835     /* ------------------------------------------------------------ */
836     private String getURI(HttpServletRequest request)
837     {
838         String uri= (String)request.getAttribute("javax.servlet.forward.request_uri");
839         if (uri == null)
840             uri= request.getRequestURI();
841         return uri;
842     }
843 
844     /* ------------------------------------------------------------ */
845     private static String toString(Object o)
846     {
847         if (o == null)
848             return null;
849 
850         try
851         {
852             if (o.getClass().isArray())
853             {
854                 StringBuffer sb = new StringBuffer();
855                 if (!o.getClass().getComponentType().isPrimitive())
856                 {
857                     Object[] array= (Object[])o;
858                     for (int i= 0; i < array.length; i++)
859                     {
860                         if (i > 0)
861                             sb.append("\n");
862                         sb.append(array.getClass().getComponentType().getName());
863                         sb.append("[");
864                         sb.append(i);
865                         sb.append("]=");
866                         sb.append(toString(array[i]));
867                     }
868                     return sb.toString();
869                 }
870                 else
871                 { 
872                     int length = Array.getLength(o);
873                     for (int i=0;i<length;i++)
874                     {
875                         if (i > 0)
876                             sb.append("\n");
877                         sb.append(o.getClass().getComponentType().getName()); 
878                         sb.append("[");
879                         sb.append(i);
880                         sb.append("]=");
881                         sb.append(toString(Array.get(o, i)));
882                     }
883                     return sb.toString();
884                 }
885             }
886             else
887                 return o.toString();
888         }
889         catch (Exception e)
890         {
891             return e.toString();
892         }
893     }
894 
895     private boolean dump(HttpServletResponse response, String data, String chars, String block, String dribble, boolean flush) throws IOException
896     {
897         if (data != null && data.length() > 0)
898         {
899             long d=Long.parseLong(data);
900             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
901             byte[] buf=new byte[b];
902             for (int i=0;i<b;i++)
903             {
904                 
905                 buf[i]=(byte)('0'+(i%10));
906                 if (i%10==9)
907                     buf[i]=(byte)'\n';
908             }
909             buf[0]='o';
910             OutputStream out=response.getOutputStream();
911             response.setContentType("text/plain");
912             while (d > 0)
913             {
914                 if (b==1)
915                 {
916                     out.write(d%80==0?'\n':'.');
917                     d--;
918                 }
919                 else if (d>=b)
920                 {
921                     out.write(buf);
922                     d=d-b;
923                 }
924                 else
925                 {
926                     out.write(buf,0,(int)d);
927                     d=0;
928                 }
929                 
930                 if (dribble!=null)
931                 {
932                     out.flush();
933                     try
934                     {
935                         Thread.sleep(Long.parseLong(dribble));
936                     }
937                     catch (Exception e)
938                     {
939                         e.printStackTrace();
940                         break;
941                     }
942                 }
943                 
944             }
945             
946             if (flush)
947                 out.flush();
948             
949             return true;
950         }
951 
952         // Handle a dump of data
953         if (chars != null && chars.length() > 0)
954         {
955             long d=Long.parseLong(chars);
956             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
957             char[] buf=new char[b];
958             for (int i=0;i<b;i++)
959             {
960                 buf[i]=(char)('0'+(i%10));
961                 if (i%10==9)
962                     buf[i]='\n';
963             }
964             buf[0]='o';
965             response.setContentType("text/plain");
966             PrintWriter out=response.getWriter();
967             while (d > 0 && !out.checkError())
968             {
969                 if (b==1)
970                 {
971                     out.write(d%80==0?'\n':'.');
972                     d--;
973                 }
974                 else if (d>=b)
975                 {
976                     out.write(buf);
977                     d=d-b;
978                 }
979                 else
980                 {
981                     out.write(buf,0,(int)d);
982                     d=0;
983                 }
984             }
985             return true;
986         }    
987         return false;
988     }
989     
990     private String notag(String s)
991     {
992         if (s==null)
993             return "null";
994         s=StringUtil.replace(s,"&","&amp;");
995         s=StringUtil.replace(s,"<","&lt;");
996         s=StringUtil.replace(s,">","&gt;");
997         return s;
998     }
999 }