View Javadoc

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  
32  import javax.servlet.ServletConfig;
33  import javax.servlet.ServletContext;
34  import javax.servlet.ServletException;
35  import javax.servlet.ServletRequest;
36  import javax.servlet.ServletRequestWrapper;
37  import javax.servlet.ServletResponse;
38  import javax.servlet.ServletResponseWrapper;
39  import javax.servlet.UnavailableException;
40  import javax.servlet.http.Cookie;
41  import javax.servlet.http.HttpServlet;
42  import javax.servlet.http.HttpServletRequest;
43  import javax.servlet.http.HttpServletRequestWrapper;
44  import javax.servlet.http.HttpServletResponse;
45  import javax.servlet.http.HttpServletResponseWrapper;
46  
47  import org.eclipse.jetty.continuation.Continuation;
48  import org.eclipse.jetty.continuation.ContinuationListener;
49  import org.eclipse.jetty.continuation.ContinuationSupport;
50  import org.eclipse.jetty.http.HttpHeaders;
51  import org.eclipse.jetty.util.IO;
52  import org.eclipse.jetty.util.StringUtil;
53  import org.eclipse.jetty.util.log.Log;
54  import org.eclipse.jetty.util.log.Logger;
55  
56  
57  
58  /* ------------------------------------------------------------ */
59  /** Dump Servlet Request.
60   * 
61   */
62  public class Dump extends HttpServlet
63  {
64      private static final Logger LOG = Log.getLogger(Dump.class);
65  
66      boolean fixed;
67      
68      /* ------------------------------------------------------------ */
69      @Override
70      public void init(ServletConfig config) throws ServletException
71      {
72      	super.init(config);
73      	
74      	if (config.getInitParameter("unavailable")!=null && !fixed)
75      	{
76      	    
77      	    fixed=true;
78      	    throw new UnavailableException("Unavailable test",Integer.parseInt(config.getInitParameter("unavailable")));
79      	}
80      }
81  
82      /* ------------------------------------------------------------ */
83      @Override
84      public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
85      {
86          doGet(request, response);
87      }
88  
89      /* ------------------------------------------------------------ */
90      @Override
91      public void doPut(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
92      {
93          byte[] buffer = new byte[8192];
94          int len=request.getContentLength();
95          int c=0;
96          InputStream in=request.getInputStream();
97          while (c<len)
98          {
99              int l = in.read(buffer);
100             if (l<0)
101                 break;
102             c+=l;
103         }
104         request.setAttribute("PUT",c+"bytes");
105         doGet(request, response);
106     }
107 
108     /* ------------------------------------------------------------ */
109     @Override
110     public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException
111     {
112         if (!request.isUserInRole("user")) 
113         {
114             try 
115             {
116                 request.login("user", "password");
117             } 
118             catch(ServletException se) 
119             {
120             	se.printStackTrace();
121             }
122         }
123         
124         // Handle a dump of data
125         final String data= request.getParameter("data");
126         final String chars= request.getParameter("chars");
127         final String block= request.getParameter("block");
128         final String dribble= request.getParameter("dribble");
129         final boolean flush= request.getParameter("flush")!=null?Boolean.parseBoolean(request.getParameter("flush")):false;
130 
131         
132         if(request.getPathInfo()!=null && request.getPathInfo().toLowerCase().indexOf("script")!=-1)
133         {
134             response.sendRedirect(response.encodeRedirectURL(getServletContext().getContextPath() + "/dump/info"));
135             return;
136         }
137             
138         request.setCharacterEncoding("UTF-8");
139         
140         if (request.getParameter("busy")!=null)
141         {
142             long end = System.currentTimeMillis()+Long.parseLong(request.getParameter("busy"));
143             while(System.currentTimeMillis()<end)
144             {}
145         }
146         
147         if (request.getParameter("empty")!=null)
148         {
149             response.setStatus(200);
150             response.flushBuffer();
151             return;
152         }
153         
154         if (request.getParameter("sleep")!=null)
155         {
156             try
157             {
158                 long s = Long.parseLong(request.getParameter("sleep"));
159                 if (request.getHeader(HttpHeaders.EXPECT)!=null &&request.getHeader(HttpHeaders.EXPECT).indexOf("102")>=0)
160                 {
161                     Thread.sleep(s/2);
162                     response.sendError(102);
163                     Thread.sleep(s/2);
164                 }
165                 else
166                     Thread.sleep(s);
167             }
168             catch (InterruptedException e)
169             {
170                 return;
171             }
172             catch (Exception e)
173             {
174                 throw new ServletException(e);
175             }
176         }
177 
178         if (request.getAttribute("RESUME")==null && request.getParameter("resume")!=null)
179         {
180             request.setAttribute("RESUME",Boolean.TRUE);
181 
182             final long resume=Long.parseLong(request.getParameter("resume"));
183             new Thread(new Runnable()
184             {
185                 public void run()
186                 {
187                     try
188                     {
189                         Thread.sleep(resume);
190                     }
191                     catch (InterruptedException e)
192                     {
193                         e.printStackTrace();
194                     }
195                     Continuation continuation = ContinuationSupport.getContinuation(request);
196                     continuation.resume();
197                 }
198                 
199             }).start();
200         }
201 
202         if (request.getParameter("complete")!=null)
203         {
204             final long complete=Long.parseLong(request.getParameter("complete"));
205             new Thread(new Runnable()
206             {
207                 public void run()
208                 {
209                     try
210                     {
211                         Thread.sleep(complete);
212                     }
213                     catch (InterruptedException e)
214                     {
215                         e.printStackTrace();
216                     }
217                     try
218                     {
219                         response.setContentType("text/html");
220                         response.getOutputStream().println("<h1>COMPLETED</h1>"); 
221                         Continuation continuation = ContinuationSupport.getContinuation(request);
222                         continuation.complete();
223                     }
224                     catch (IOException e)
225                     {
226                         e.printStackTrace();
227                     }
228                 }
229 
230             }).start();
231         }
232         
233         if (request.getParameter("suspend")!=null && request.getAttribute("SUSPEND")!=Boolean.TRUE)
234         {
235             request.setAttribute("SUSPEND",Boolean.TRUE);
236             try
237             {
238                 Continuation continuation = ContinuationSupport.getContinuation(request);
239                 continuation.setTimeout(Long.parseLong(request.getParameter("suspend")));
240                 continuation.suspend();
241                 
242                 continuation.addContinuationListener(new ContinuationListener()
243                 {   
244                     public void onTimeout(Continuation continuation)
245                     {
246                         response.addHeader("Dump","onTimeout");
247                         try
248                         {
249                             if (!dump(response,data,chars,block,dribble,flush))
250                             {
251                                 response.setContentType("text/plain");
252                                 response.getOutputStream().println("EXPIRED");
253                             }
254                             continuation.complete();
255                         }
256                         catch (IOException e)
257                         {
258                             LOG.ignore(e);
259                         }
260                     }
261                     
262                     public void onComplete(Continuation continuation)
263                     {
264                         response.addHeader("Dump","onComplete");
265                     }
266                 });
267                 
268                 continuation.undispatch();
269             }
270             catch(Exception e)
271             {
272                 throw new ServletException(e);
273             }
274         }        
275             
276         request.setAttribute("Dump", this);
277         getServletContext().setAttribute("Dump",this);
278         // getServletContext().log("dump "+request.getRequestURI());
279 
280         // Force a content length response
281         String length= request.getParameter("length");
282         if (length != null && length.length() > 0)
283         {
284             response.setContentLength(Integer.parseInt(length));
285         }
286 
287         // Handle a dump of data
288         if (dump(response,data,chars,block,dribble,flush))
289             return;
290         
291         // handle an exception
292         String info= request.getPathInfo();
293         if (info != null && info.endsWith("Exception"))
294         {
295             try
296             {
297                 throw (Throwable) Thread.currentThread().getContextClassLoader().loadClass(info.substring(1)).newInstance();
298             }
299             catch (Throwable th)
300             {
301                 throw new ServletException(th);
302             }
303         }
304 
305         // test a reset
306         String reset= request.getParameter("reset");
307         if (reset != null && reset.length() > 0)
308         {
309             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
310             response.setHeader("SHOULD_NOT","BE SEEN");
311             response.reset();
312         }
313         
314         
315         // handle an redirect
316         String redirect= request.getParameter("redirect");
317         if (redirect != null && redirect.length() > 0)
318         {
319             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
320             response.sendRedirect(response.encodeRedirectURL(redirect));
321             try
322             {
323                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
324             }
325             catch(IOException e)
326             {
327                 // ignored as stream is closed.
328             }
329             return;
330         }
331 
332         // handle an error
333         String error= request.getParameter("error");
334         if (error != null && error.length() > 0 && request.getAttribute("javax.servlet.error.status_code")==null)
335         {
336             response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
337             response.sendError(Integer.parseInt(error));
338             try
339             {
340                 response.getOutputStream().println("THIS SHOULD NOT BE SEEN!");
341             }
342             catch(IllegalStateException e)
343             {
344                 try
345                 {
346                     response.getWriter().println("NOR THIS!!"); 
347                 }
348                 catch(IOException e2){}
349             }
350             catch(IOException e){}
351             return;
352         }
353 
354         // Handle a extra headers 
355         String headers= request.getParameter("headers");
356         if (headers != null && headers.length() > 0)
357         {
358             long h=Long.parseLong(headers);
359             for (int i=0;i<h;i++)
360                 response.addHeader("Header"+i,"Value"+i);
361         }
362 
363         String buffer= request.getParameter("buffer");
364         if (buffer != null && buffer.length() > 0)
365             response.setBufferSize(Integer.parseInt(buffer));
366 
367         String charset= request.getParameter("charset");
368         if (charset==null)
369             charset="UTF-8";
370         response.setCharacterEncoding(charset);
371         response.setContentType("text/html");
372 
373         if (info != null && info.indexOf("Locale/") >= 0)
374         {
375             try
376             {
377                 String locale_name= info.substring(info.indexOf("Locale/") + 7);
378                 Field f= java.util.Locale.class.getField(locale_name);
379                 response.setLocale((Locale)f.get(null));
380             }
381             catch (Exception e)
382             {
383                 e.printStackTrace();
384                 response.setLocale(Locale.getDefault());
385             }
386         }
387 
388         String cn= request.getParameter("cookie");
389         String cv=request.getParameter("cookiev");
390         if (cn!=null && cv!=null)
391         {
392             Cookie cookie= new Cookie(cn, cv);
393             if (request.getParameter("version")!=null)
394                 cookie.setVersion(Integer.parseInt(request.getParameter("version")));
395             cookie.setComment("Cookie from dump servlet");
396             response.addCookie(cookie);
397         }
398 
399         String pi= request.getPathInfo();
400         if (pi != null && pi.startsWith("/ex"))
401         {
402             OutputStream out= response.getOutputStream();
403             out.write("</H1>This text should be reset</H1>".getBytes());
404             if ("/ex0".equals(pi))
405                 throw new ServletException("test ex0", new Throwable());
406             else if ("/ex1".equals(pi))
407                 throw new IOException("test ex1");
408             else if ("/ex2".equals(pi))
409                 throw new UnavailableException("test ex2");
410             else if (pi.startsWith("/ex3/"))
411                 throw new UnavailableException("test ex3",Integer.parseInt(pi.substring(5)));
412             throw new RuntimeException("test");
413         }
414 
415         if ("true".equals(request.getParameter("close")))
416             response.setHeader("Connection","close");
417 
418         String buffered= request.getParameter("buffered");
419         
420         PrintWriter pout=null;
421         
422         try
423         {
424             pout =response.getWriter();
425         }
426         catch(IllegalStateException e)
427         {
428             pout=new PrintWriter(new OutputStreamWriter(response.getOutputStream(),charset));
429         }
430         if (buffered!=null)
431             pout = new PrintWriter(new BufferedWriter(pout,Integer.parseInt(buffered)));
432         
433         try
434         {
435             pout.write("<html>\n<body>\n");
436             pout.write("<h1>Dump Servlet</h1>\n");
437             pout.write("<table width=\"95%\">");
438             pout.write("<tr>\n");
439             pout.write("<th align=\"right\">getMethod:&nbsp;</th>");
440             pout.write("<td>" + notag(request.getMethod())+"</td>");
441             pout.write("</tr><tr>\n");
442             pout.write("<th align=\"right\">getContentLength:&nbsp;</th>");
443             pout.write("<td>"+Integer.toString(request.getContentLength())+"</td>");
444             pout.write("</tr><tr>\n");
445             pout.write("<th align=\"right\">getContentType:&nbsp;</th>");
446             pout.write("<td>"+notag(request.getContentType())+"</td>");
447             pout.write("</tr><tr>\n");
448             pout.write("<th align=\"right\">getRequestURI:&nbsp;</th>");
449             pout.write("<td>"+notag(request.getRequestURI())+"</td>");
450             pout.write("</tr><tr>\n");
451             pout.write("<th align=\"right\">getRequestURL:&nbsp;</th>");
452             pout.write("<td>"+notag(request.getRequestURL().toString())+"</td>");
453             pout.write("</tr><tr>\n");
454             pout.write("<th align=\"right\">getContextPath:&nbsp;</th>");
455             pout.write("<td>"+request.getContextPath()+"</td>");
456             pout.write("</tr><tr>\n");
457             pout.write("<th align=\"right\">getServletPath:&nbsp;</th>");
458             pout.write("<td>"+notag(request.getServletPath())+"</td>");
459             pout.write("</tr><tr>\n");
460             pout.write("<th align=\"right\">getPathInfo:&nbsp;</th>");
461             pout.write("<td>"+notag(request.getPathInfo())+"</td>");
462             pout.write("</tr><tr>\n");
463             pout.write("<th align=\"right\">getPathTranslated:&nbsp;</th>");
464             pout.write("<td>"+notag(request.getPathTranslated())+"</td>");
465             pout.write("</tr><tr>\n");
466             pout.write("<th align=\"right\">getQueryString:&nbsp;</th>");
467             pout.write("<td>"+notag(request.getQueryString())+"</td>");
468             pout.write("</tr><tr>\n");
469             
470             pout.write("<th align=\"right\">getProtocol:&nbsp;</th>");
471             pout.write("<td>"+request.getProtocol()+"</td>");
472             pout.write("</tr><tr>\n");
473             pout.write("<th align=\"right\">getScheme:&nbsp;</th>");
474             pout.write("<td>"+request.getScheme()+"</td>");
475             pout.write("</tr><tr>\n");
476             pout.write("<th align=\"right\">getServerName:&nbsp;</th>");
477             pout.write("<td>"+notag(request.getServerName())+"</td>");
478             pout.write("</tr><tr>\n");
479             pout.write("<th align=\"right\">getServerPort:&nbsp;</th>");
480             pout.write("<td>"+Integer.toString(request.getServerPort())+"</td>");
481             pout.write("</tr><tr>\n");
482             pout.write("<th align=\"right\">getLocalName:&nbsp;</th>");
483             pout.write("<td>"+request.getLocalName()+"</td>");
484             pout.write("</tr><tr>\n");
485             pout.write("<th align=\"right\">getLocalAddr:&nbsp;</th>");
486             pout.write("<td>"+request.getLocalAddr()+"</td>");
487             pout.write("</tr><tr>\n");
488             pout.write("<th align=\"right\">getLocalPort:&nbsp;</th>");
489             pout.write("<td>"+Integer.toString(request.getLocalPort())+"</td>");
490             pout.write("</tr><tr>\n");
491             pout.write("<th align=\"right\">getRemoteUser:&nbsp;</th>");
492             pout.write("<td>"+request.getRemoteUser()+"</td>");
493             pout.write("</tr><tr>\n");
494             pout.write("<th align=\"right\">getUserPrincipal:&nbsp;</th>");
495             pout.write("<td>"+request.getUserPrincipal()+"</td>");
496             pout.write("</tr><tr>\n");
497             pout.write("<th align=\"right\">getRemoteAddr:&nbsp;</th>");
498             pout.write("<td>"+request.getRemoteAddr()+"</td>");
499             pout.write("</tr><tr>\n");
500             pout.write("<th align=\"right\">getRemoteHost:&nbsp;</th>");
501             pout.write("<td>"+request.getRemoteHost()+"</td>");
502             pout.write("</tr><tr>\n");
503             pout.write("<th align=\"right\">getRemotePort:&nbsp;</th>");
504             pout.write("<td>"+request.getRemotePort()+"</td>");
505             pout.write("</tr><tr>\n");
506             pout.write("<th align=\"right\">getRequestedSessionId:&nbsp;</th>");
507             pout.write("<td>"+request.getRequestedSessionId()+"</td>");
508             pout.write("</tr><tr>\n");
509             pout.write("<th align=\"right\">isSecure():&nbsp;</th>");
510             pout.write("<td>"+request.isSecure()+"</td>");
511 
512             pout.write("</tr><tr>\n");
513             pout.write("<th align=\"right\">isUserInRole(admin):&nbsp;</th>");
514             pout.write("<td>"+request.isUserInRole("admin")+"</td>");
515 
516             pout.write("</tr><tr>\n");
517             pout.write("<th align=\"right\">getLocale:&nbsp;</th>");
518             pout.write("<td>"+request.getLocale()+"</td>");
519             
520             Enumeration locales= request.getLocales();
521             while (locales.hasMoreElements())
522             {
523                 pout.write("</tr><tr>\n");
524                 pout.write("<th align=\"right\">getLocales:&nbsp;</th>");
525                 pout.write("<td>"+locales.nextElement()+"</td>");
526             }
527             pout.write("</tr><tr>\n");
528             
529             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Other HTTP Headers:</big></th>");
530             Enumeration h= request.getHeaderNames();
531             String name;
532             while (h.hasMoreElements())
533             {
534                 name= (String)h.nextElement();
535 
536                 Enumeration h2= request.getHeaders(name);
537                 while (h2.hasMoreElements())
538                 {
539                     String hv= (String)h2.nextElement();
540                     pout.write("</tr><tr>\n");
541                     pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
542                     pout.write("<td>"+notag(hv)+"</td>");
543                 }
544             }
545 
546             pout.write("</tr><tr>\n");
547             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Parameters:</big></th>");
548             h= request.getParameterNames();
549             while (h.hasMoreElements())
550             {
551                 name= (String)h.nextElement();
552                 pout.write("</tr><tr>\n");
553                 pout.write("<th align=\"right\">"+notag(name)+":&nbsp;</th>");
554                 pout.write("<td>"+notag(request.getParameter(name))+"</td>");
555                 String[] values= request.getParameterValues(name);
556                 if (values == null)
557                 {
558                     pout.write("</tr><tr>\n");
559                     pout.write("<th align=\"right\">"+notag(name)+" Values:&nbsp;</th>");
560                     pout.write("<td>"+"NULL!"+"</td>");
561                 }
562                 else if (values.length > 1)
563                 {
564                     for (int i= 0; i < values.length; i++)
565                     {
566                         pout.write("</tr><tr>\n");
567                         pout.write("<th align=\"right\">"+notag(name)+"["+i+"]:&nbsp;</th>");
568                         pout.write("<td>"+notag(values[i])+"</td>");
569                     }
570                 }
571             }
572 
573             pout.write("</tr><tr>\n");
574             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Cookies:</big></th>");
575             Cookie[] cookies = request.getCookies();
576             for (int i=0; cookies!=null && i<cookies.length;i++)
577             {
578                 Cookie cookie = cookies[i];
579 
580                 pout.write("</tr><tr>\n");
581                 pout.write("<th align=\"right\">"+notag(cookie.getName())+":&nbsp;</th>");
582                 pout.write("<td>"+notag(cookie.getValue())+"</td>");
583             }
584             
585             String content_type=request.getContentType();
586             if (content_type!=null &&
587                 !content_type.startsWith("application/x-www-form-urlencoded") &&
588                 !content_type.startsWith("multipart/form-data"))
589             {
590                 pout.write("</tr><tr>\n");
591                 pout.write("<th align=\"left\" valign=\"top\" colspan=\"2\"><big><br/>Content:</big></th>");
592                 pout.write("</tr><tr>\n");
593                 pout.write("<td><pre>");
594                 char[] content= new char[4096];
595                 int len;
596                 try{
597                     Reader in=request.getReader();
598                     
599                     while((len=in.read(content))>=0)
600                         pout.write(notag(new String(content,0,len)));
601                 }
602                 catch(IOException e)
603                 {
604                     pout.write(e.toString());
605                 }
606                 
607                 pout.write("</pre></td>");
608             }
609             
610             pout.write("</tr><tr>\n");
611             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Request Attributes:</big></th>");
612             Enumeration a= request.getAttributeNames();
613             while (a.hasMoreElements())
614             {
615                 name= (String)a.nextElement();
616                 pout.write("</tr><tr>\n");
617                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
618                 Object value=request.getAttribute(name);
619                 if (value instanceof File)
620                 {
621                     File file = (File)value;
622                     pout.write("<td>"+"<pre>" + file.getName()+" ("+file.length()+" "+new Date(file.lastModified())+ ")</pre>"+"</td>");
623                 }
624                 else
625                     pout.write("<td>"+"<pre>" + toString(request.getAttribute(name)) + "</pre>"+"</td>");
626             }
627             request.setAttribute("org.eclipse.jetty.servlet.MultiPartFilter.files",null);
628 
629             
630             pout.write("</tr><tr>\n");
631             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Servlet InitParameters:</big></th>");
632             a= getInitParameterNames();
633             while (a.hasMoreElements())
634             {
635                 name= (String)a.nextElement();
636                 pout.write("</tr><tr>\n");
637                 pout.write("<th align=\"right\">"+name+":&nbsp;</th>");
638                 pout.write("<td>"+ toString(getInitParameter(name)) +"</td>");
639             }
640 
641             pout.write("</tr><tr>\n");
642             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context InitParameters:</big></th>");
643             a= getServletContext().getInitParameterNames();
644             while (a.hasMoreElements())
645             {
646                 name= (String)a.nextElement();
647                 pout.write("</tr><tr>\n");
648                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
649                 pout.write("<td>"+ toString(getServletContext().getInitParameter(name)) + "</td>");
650             }
651 
652             pout.write("</tr><tr>\n");
653             pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Context Attributes:</big></th>");
654             a= getServletContext().getAttributeNames();
655             while (a.hasMoreElements())
656             {
657                 name= (String)a.nextElement();
658                 pout.write("</tr><tr>\n");
659                 pout.write("<th align=\"right\" valign=\"top\">"+name.replace("."," .")+":&nbsp;</th>");
660                 pout.write("<td>"+"<pre>" + toString(getServletContext().getAttribute(name)) + "</pre>"+"</td>");
661             }
662 
663             String res= request.getParameter("resource");
664             if (res != null && res.length() > 0)
665             {
666                 pout.write("</tr><tr>\n");
667                 pout.write("<th align=\"left\" colspan=\"2\"><big><br/>Get Resource: \""+res+"\"</big></th>");
668 
669                 pout.write("</tr><tr>\n");
670                 pout.write("<th align=\"right\">getServletContext().getResource(...):&nbsp;</th>");
671                 try{pout.write("<td>"+getServletContext().getResource(res)+"</td>");}
672                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
673                 
674                 pout.write("</tr><tr>\n");
675                 pout.write("<th align=\"right\">getServletContext().getResourcePaths(...):&nbsp;</th>");
676                 try{pout.write("<td>"+getServletContext().getResourcePaths(res)+"</td>");}
677                 catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
678                 
679                 pout.write("</tr><tr>\n");
680                 pout.write("<th align=\"right\">getServletContext().getContext(...):&nbsp;</th>");
681                 
682                 ServletContext context = getServletContext().getContext(res);
683                 pout.write("<td>"+context+"</td>");
684                 
685                 if (context!=null)
686                 {
687                     pout.write("</tr><tr>\n");
688                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResource(...):&nbsp;</th>");
689                     try{pout.write("<td>"+context.getResource(res)+"</td>");}
690                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
691                     
692                     pout.write("</tr><tr>\n");
693                     pout.write("<th align=\"right\">getServletContext().getContext(...).getResourcePaths(...):&nbsp;</th>");
694                     try{pout.write("<td>"+context.getResourcePaths(res)+"</td>");}
695                     catch(Exception e) {pout.write("<td>"+"" +e+"</td>");}
696                     
697                     String cp=context.getContextPath();
698                     if (cp==null || "/".equals(cp))
699                         cp="";
700                     pout.write("</tr><tr>\n");
701                     pout.write("<th align=\"right\">getServletContext().getContext(...),getRequestDispatcher(...):&nbsp;</th>");
702                     pout.write("<td>"+getServletContext().getContext(res).getRequestDispatcher(res.substring(cp.length()))+"</td>");
703                 }
704 
705                 pout.write("</tr><tr>\n");
706                 pout.write("<th align=\"right\">this.getClass().getResource(...):&nbsp;</th>");
707                 pout.write("<td>"+this.getClass().getResource(res)+"</td>");
708 
709                 pout.write("</tr><tr>\n");
710                 pout.write("<th align=\"right\">this.getClass().getClassLoader().getResource(...):&nbsp;</th>");
711                 pout.write("<td>"+this.getClass().getClassLoader().getResource(res)+"</td>");
712 
713                 pout.write("</tr><tr>\n");
714                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResource(...):&nbsp;</th>");
715                 pout.write("<td>"+Thread.currentThread().getContextClassLoader().getResource(res)+"</td>");
716                 pout.write("</tr><tr>\n");
717                 pout.write("<th align=\"right\">Thread.currentThread().getContextClassLoader().getResources(...):&nbsp;</th>");
718                 Enumeration<URL> urls = Thread.currentThread().getContextClassLoader().getResources(res);
719                 if (urls==null)
720                     pout.write("<td>null</td>");
721                 else
722                     pout.write("<td>"+Collections.list(urls)+"</td>");
723 
724             }
725             
726             pout.write("</tr></table>\n");
727 
728             /* ------------------------------------------------------------ */
729             pout.write("<h2>Request Wrappers</h2>\n");
730             ServletRequest rw=request;
731             int w=0;
732             while (rw !=null)
733             {
734                 pout.write((w++)+": "+rw.getClass().getName()+"<br/>");
735                 if (rw instanceof HttpServletRequestWrapper)
736                     rw=((HttpServletRequestWrapper)rw).getRequest();
737                 else if (rw instanceof ServletRequestWrapper)
738                     rw=((ServletRequestWrapper)rw).getRequest();
739                 else
740                     rw=null;
741             }
742 
743             /* ------------------------------------------------------------ */
744             pout.write("<h2>Response Wrappers</h2>\n");
745             ServletResponse rsw=response;
746             w=0;
747             while (rsw !=null)
748             {
749                 pout.write((w++)+": "+rsw.getClass().getName()+"<br/>");
750                 if (rsw instanceof HttpServletResponseWrapper)
751                     rsw=((HttpServletResponseWrapper)rsw).getResponse();
752                 else if (rsw instanceof ServletResponseWrapper)
753                     rsw=((ServletResponseWrapper)rsw).getResponse();
754                 else
755                     rsw=null;
756             }
757             
758             pout.write("<br/>");
759             pout.write("<h2>International Characters (UTF-8)</h2>");
760             pout.write("LATIN LETTER SMALL CAPITAL AE<br/>\n");
761             pout.write("Directly uni encoded(\\u1d01): \u1d01<br/>");
762             pout.write("HTML reference (&amp;AElig;): &AElig;<br/>");
763             pout.write("Decimal (&amp;#7425;): &#7425;<br/>");
764             pout.write("Javascript unicode (\\u1d01) : <script language='javascript'>document.write(\"\u1d01\");</script><br/>");
765             pout.write("<br/>");
766             pout.write("<h2>Form to generate GET content</h2>");
767             pout.write("<form method=\"GET\" action=\""+response.encodeURL(getURI(request))+"\">");
768             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
769             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\">");
770             pout.write("</form>");
771 
772             pout.write("<br/>");
773             
774             pout.write("<h2>Form to generate POST content</h2>");
775             pout.write("<form method=\"POST\" accept-charset=\"utf-8\" action=\""+response.encodeURL(getURI(request))+"\">");
776             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"value\"/><br/>\n");
777             pout.write("Select: <select multiple name=\"Select\">\n");
778             pout.write("<option>ValueA</option>");
779             pout.write("<option>ValueB1,ValueB2</option>");
780             pout.write("<option>ValueC</option>");
781             pout.write("</select><br/>");
782             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
783             pout.write("</form>");
784             pout.write("<br/>");
785             
786             pout.write("<h2>Form to generate UPLOAD content</h2>");
787             pout.write("<form method=\"POST\" enctype=\"multipart/form-data\" accept-charset=\"utf-8\" action=\""+
788                     response.encodeURL(getURI(request))+(request.getQueryString()==null?"":("?"+request.getQueryString()))+
789                     "\">");
790             pout.write("TextField: <input type=\"text\" name=\"TextField\" value=\"comment\"/><br/>\n");
791             pout.write("File 1: <input type=\"file\" name=\"file1\" /><br/>\n");
792             pout.write("File 2: <input type=\"file\" name=\"file2\" /><br/>\n");
793             pout.write("<input type=\"submit\" name=\"Action\" value=\"Submit\"><br/>");
794             pout.write("</form>");
795 
796             pout.write("<h2>Form to set Cookie</h2>");
797             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
798             pout.write("cookie: <input type=\"text\" name=\"cookie\" /><br/>\n");
799             pout.write("value: <input type=\"text\" name=\"cookiev\" /><br/>\n");
800             pout.write("<input type=\"submit\" name=\"Action\" value=\"setCookie\">");
801             pout.write("</form>\n");
802             
803             pout.write("<h2>Form to get Resource</h2>");
804             pout.write("<form method=\"POST\" action=\""+response.encodeURL(getURI(request))+"\">");
805             pout.write("resource: <input type=\"text\" name=\"resource\" /><br/>\n");
806             pout.write("<input type=\"submit\" name=\"Action\" value=\"getResource\">");
807             pout.write("</form>\n");
808         }
809         catch (Exception e)
810         {
811             getServletContext().log("dump", e);
812         }
813         
814         String lines= request.getParameter("lines");
815         if (lines!=null)
816         {
817             char[] line = "<span>A line of characters. Blah blah blah blah.  blooble blooble</span></br>\n".toCharArray();
818             for (int l=Integer.parseInt(lines);l-->0;)
819             {
820                 pout.write("<span>"+l+" </span>");
821                 pout.write(line);
822             }
823         }
824         
825         pout.write("</body>\n</html>\n");
826         
827         pout.close();
828 
829         if (pi != null)
830         {
831             if ("/ex4".equals(pi))
832                 throw new ServletException("test ex4", new Throwable());
833             if ("/ex5".equals(pi))
834                 throw new IOException("test ex5");
835             if ("/ex6".equals(pi))
836                 throw new UnavailableException("test ex6");
837         }
838 
839 
840     }
841 
842 
843     /* ------------------------------------------------------------ */
844     @Override
845     public String getServletInfo()
846     {
847         return "Dump Servlet";
848     }
849 
850     /* ------------------------------------------------------------ */
851     @Override
852     public synchronized void destroy()
853     {
854     }
855 
856     /* ------------------------------------------------------------ */
857     private String getURI(HttpServletRequest request)
858     {
859         String uri= (String)request.getAttribute("javax.servlet.forward.request_uri");
860         if (uri == null)
861             uri= request.getRequestURI();
862         return uri;
863     }
864 
865     /* ------------------------------------------------------------ */
866     private static String toString(Object o)
867     {
868         if (o == null)
869             return null;
870 
871         try
872         {
873             if (o.getClass().isArray())
874             {
875                 StringBuffer sb = new StringBuffer();
876                 if (!o.getClass().getComponentType().isPrimitive())
877                 {
878                     Object[] array= (Object[])o;
879                     for (int i= 0; i < array.length; i++)
880                     {
881                         if (i > 0)
882                             sb.append("\n");
883                         sb.append(array.getClass().getComponentType().getName());
884                         sb.append("[");
885                         sb.append(i);
886                         sb.append("]=");
887                         sb.append(toString(array[i]));
888                     }
889                     return sb.toString();
890                 }
891                 else
892                 { 
893                     int length = Array.getLength(o);
894                     for (int i=0;i<length;i++)
895                     {
896                         if (i > 0)
897                             sb.append("\n");
898                         sb.append(o.getClass().getComponentType().getName()); 
899                         sb.append("[");
900                         sb.append(i);
901                         sb.append("]=");
902                         sb.append(toString(Array.get(o, i)));
903                     }
904                     return sb.toString();
905                 }
906             }
907             else
908                 return o.toString();
909         }
910         catch (Exception e)
911         {
912             return e.toString();
913         }
914     }
915 
916     private boolean dump(HttpServletResponse response, String data, String chars, String block, String dribble, boolean flush) throws IOException
917     {
918         if (data != null && data.length() > 0)
919         {
920             long d=Long.parseLong(data);
921             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
922             byte[] buf=new byte[b];
923             for (int i=0;i<b;i++)
924             {
925                 
926                 buf[i]=(byte)('0'+(i%10));
927                 if (i%10==9)
928                     buf[i]=(byte)'\n';
929             }
930             buf[0]='o';
931             OutputStream out=response.getOutputStream();
932             response.setContentType("text/plain");
933             while (d > 0)
934             {
935                 if (b==1)
936                 {
937                     out.write(d%80==0?'\n':'.');
938                     d--;
939                 }
940                 else if (d>=b)
941                 {
942                     out.write(buf);
943                     d=d-b;
944                 }
945                 else
946                 {
947                     out.write(buf,0,(int)d);
948                     d=0;
949                 }
950                 
951                 if (dribble!=null)
952                 {
953                     out.flush();
954                     try
955                     {
956                         Thread.sleep(Long.parseLong(dribble));
957                     }
958                     catch (Exception e)
959                     {
960                         e.printStackTrace();
961                         break;
962                     }
963                 }
964                 
965             }
966             
967             if (flush)
968                 out.flush();
969             
970             return true;
971         }
972 
973         // Handle a dump of data
974         if (chars != null && chars.length() > 0)
975         {
976             long d=Long.parseLong(chars);
977             int b=(block!=null&&block.length()>0)?Integer.parseInt(block):50;
978             char[] buf=new char[b];
979             for (int i=0;i<b;i++)
980             {
981                 buf[i]=(char)('0'+(i%10));
982                 if (i%10==9)
983                     buf[i]='\n';
984             }
985             buf[0]='o';
986             response.setContentType("text/plain");
987             PrintWriter out=response.getWriter();
988             while (d > 0 && !out.checkError())
989             {
990                 if (b==1)
991                 {
992                     out.write(d%80==0?'\n':'.');
993                     d--;
994                 }
995                 else if (d>=b)
996                 {
997                     out.write(buf);
998                     d=d-b;
999                 }
1000                 else
1001                 {
1002                     out.write(buf,0,(int)d);
1003                     d=0;
1004                 }
1005             }
1006             return true;
1007         }    
1008         return false;
1009     }
1010     
1011     private String notag(String s)
1012     {
1013         if (s==null)
1014             return "null";
1015         s=StringUtil.replace(s,"&","&amp;");
1016         s=StringUtil.replace(s,"<","&lt;");
1017         s=StringUtil.replace(s,">","&gt;");
1018         return s;
1019     }
1020 }