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19 package org.eclipse.jetty.security;
20
21 import java.security.SecureRandom;
22 import java.util.HashMap;
23 import java.util.Map;
24 import java.util.Random;
25
26 import javax.servlet.http.Cookie;
27 import javax.servlet.http.HttpServletRequest;
28 import javax.servlet.http.HttpServletResponse;
29
30
31
32
33 public class HashCrossContextPsuedoSession<T> implements CrossContextPsuedoSession<T>
34 {
35 private final String _cookieName;
36
37 private final String _cookiePath;
38
39 private final Random _random = new SecureRandom();
40
41 private final Map<String, T> _data = new HashMap<String, T>();
42
43 public HashCrossContextPsuedoSession(String cookieName, String cookiePath)
44 {
45 this._cookieName = cookieName;
46 this._cookiePath = cookiePath == null ? "/" : cookiePath;
47 }
48
49 public T fetch(HttpServletRequest request)
50 {
51 for (Cookie cookie : request.getCookies())
52 {
53 if (_cookieName.equals(cookie.getName()))
54 {
55 String key = cookie.getValue();
56 return _data.get(key);
57 }
58 }
59 return null;
60 }
61
62 public void store(T datum, HttpServletResponse response)
63 {
64 String key;
65
66 synchronized (_data)
67 {
68
69 while (true)
70 {
71 key = Long.toString(Math.abs(_random.nextLong()), 30 + (int) (System.currentTimeMillis() % 7));
72 if (!_data.containsKey(key)) break;
73 }
74
75 _data.put(key, datum);
76 }
77
78 Cookie cookie = new Cookie(_cookieName, key);
79 cookie.setPath(_cookiePath);
80 response.addCookie(cookie);
81 }
82
83 public void clear(HttpServletRequest request)
84 {
85 for (Cookie cookie : request.getCookies())
86 {
87 if (_cookieName.equals(cookie.getName()))
88 {
89 String key = cookie.getValue();
90 _data.remove(key);
91 break;
92 }
93 }
94 }
95 }