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authorRobert Adams2015-09-08 04:54:16 -0700
committerRobert Adams2015-09-08 04:54:16 -0700
commite5367d822be9b05e74c859afe2d2956a3e95aa33 (patch)
treee904050a30715df587aa527d7f313755177726a7 /OpenSim/Framework/Communications/Limit/TimeLimitStrategy.cs
parentadd lost admin_reset_land method (diff)
parentDeleted access control spec from [LoginService] section of standalone config.... (diff)
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Merge of ubitworkvarnew with opensim/master as of 20150905.
This integrates the OpenSim refactoring to make physics, etc into modules. AVN physics hasn't been moved to new location. Does not compile yet. Merge branch 'osmaster' into mbworknew1
Diffstat (limited to 'OpenSim/Framework/Communications/Limit/TimeLimitStrategy.cs')
-rw-r--r--OpenSim/Framework/Communications/Limit/TimeLimitStrategy.cs140
1 files changed, 0 insertions, 140 deletions
diff --git a/OpenSim/Framework/Communications/Limit/TimeLimitStrategy.cs b/OpenSim/Framework/Communications/Limit/TimeLimitStrategy.cs
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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSimulator Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28using System;
29using System.Collections.Generic;
30
31namespace OpenSim.Framework.Communications.Limit
32{
33 /// <summary>
34 /// Limit requests by discarding repeat attempts that occur within a given time period
35 ///
36 /// XXX Don't use this for limiting texture downloading, at least not until we better handle multiple requests
37 /// for the same texture at different resolutions.
38 /// </summary>
39 public class TimeLimitStrategy<TId> : IRequestLimitStrategy<TId>
40 {
41 /// <summary>
42 /// Record the time at which an asset request occurs.
43 /// </summary>
44 private readonly Dictionary<TId, Request> requests = new Dictionary<TId, Request>();
45
46 /// <summary>
47 /// The minimum time period between which requests for the same data will be serviced.
48 /// </summary>
49 private readonly TimeSpan m_repeatPeriod;
50 public TimeSpan RepeatPeriod
51 {
52 get { return m_repeatPeriod; }
53 }
54
55 /// <summary></summary>
56 /// <param name="repeatPeriod"></param>
57 public TimeLimitStrategy(TimeSpan repeatPeriod)
58 {
59 m_repeatPeriod = repeatPeriod;
60 }
61
62 /// <summary>
63 /// <see cref="IRequestLimitStrategy"/>
64 /// </summary>
65 public bool AllowRequest(TId id)
66 {
67 if (IsMonitoringRequests(id))
68 {
69 DateTime now = DateTime.Now;
70 TimeSpan elapsed = now - requests[id].Time;
71
72 if (elapsed < RepeatPeriod)
73 {
74 requests[id].Refusals += 1;
75 return false;
76 }
77
78 requests[id].Time = now;
79 }
80
81 return true;
82 }
83
84 /// <summary>
85 /// <see cref="IRequestLimitStrategy"/>
86 /// </summary>
87 public bool IsFirstRefusal(TId id)
88 {
89 if (IsMonitoringRequests(id))
90 {
91 if (1 == requests[id].Refusals)
92 {
93 return true;
94 }
95 }
96
97 return false;
98 }
99
100 /// <summary>
101 /// <see cref="IRequestLimitStrategy"/>
102 /// </summary>
103 public void MonitorRequests(TId id)
104 {
105 if (!IsMonitoringRequests(id))
106 {
107 requests.Add(id, new Request(DateTime.Now));
108 }
109 }
110
111 /// <summary>
112 /// <see cref="IRequestLimitStrategy"/>
113 /// </summary>
114 public bool IsMonitoringRequests(TId id)
115 {
116 return requests.ContainsKey(id);
117 }
118 }
119
120 /// <summary>
121 /// Private request details.
122 /// </summary>
123 class Request
124 {
125 /// <summary>
126 /// Time of last request
127 /// </summary>
128 public DateTime Time;
129
130 /// <summary>
131 /// Number of refusals associated with this request
132 /// </summary>
133 public int Refusals;
134
135 public Request(DateTime time)
136 {
137 Time = time;
138 }
139 }
140}