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14 package com.acme;
15 import java.io.IOException;
16 import java.io.PrintWriter;
17
18 import javax.servlet.ServletException;
19 import javax.servlet.http.Cookie;
20 import javax.servlet.http.HttpServlet;
21 import javax.servlet.http.HttpServletRequest;
22 import javax.servlet.http.HttpServletResponse;
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29
30 public class CookieDump extends HttpServlet
31 {
32 int redirectCount=0;
33
34
35 protected void handleForm(HttpServletRequest request,
36 HttpServletResponse response)
37 {
38 String name = request.getParameter("Name");
39 String value = request.getParameter("Value");
40 String age = request.getParameter("Age");
41
42 if (name!=null && name.length()>0)
43 {
44 Cookie cookie = new Cookie(name,value);
45 if (age!=null && age.length()>0)
46 cookie.setMaxAge(Integer.parseInt(age));
47 response.addCookie(cookie);
48 }
49 }
50
51
52 @Override
53 public void doPost(HttpServletRequest request,
54 HttpServletResponse response)
55 throws ServletException, IOException
56 {
57 handleForm(request,response);
58 String nextUrl = getURI(request)+"?R="+redirectCount++;
59 String encodedUrl=response.encodeRedirectURL(nextUrl);
60 response.sendRedirect(encodedUrl);
61 }
62
63
64 @Override
65 public void doGet(HttpServletRequest request,
66 HttpServletResponse response)
67 throws ServletException, IOException
68 {
69 handleForm(request,response);
70
71 response.setContentType("text/html");
72
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74 PrintWriter out = response.getWriter();
75 out.println("<h1>Cookie Dump Servlet:</h1>");
76
77 Cookie[] cookies = request.getCookies();
78
79 for (int i=0;cookies!=null && i<cookies.length;i++)
80 {
81 out.println("<b>"+deScript(cookies[i].getName())+"</b>="+deScript(cookies[i].getValue())+"<br/>");
82 }
83
84 out.println("<form action=\""+response.encodeURL(getURI(request))+"\" method=\"post\">");
85
86 out.println("<b>Name:</b><input type=\"text\" name=\"Name\" value=\"name\"/><br/>");
87 out.println("<b>Value:</b><input type=\"text\" name=\"Value\" value=\"value\"/><br/>");
88 out.println("<b>Max-Age:</b><input type=\"text\" name=\"Age\" value=\"60\"/><br/>");
89 out.println("<input type=\"submit\" name=\"Action\" value=\"Set\"/>");
90
91 }
92
93
94 @Override
95 public String getServletInfo() {
96 return "Session Dump Servlet";
97 }
98
99
100 private String getURI(HttpServletRequest request)
101 {
102 String uri=(String)request.getAttribute("javax.servlet.forward.request_uri");
103 if (uri==null)
104 uri=request.getRequestURI();
105 return uri;
106 }
107
108
109 protected String deScript(String string)
110 {
111 if (string==null)
112 return null;
113 string=string.replace("&", "&");
114 string=string.replace( "<", "<");
115 string=string.replace( ">", ">");
116 return string;
117 }
118
119 }