opensim-development – Blame information for rev 1
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| Rev | Author | Line No. | Line |
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| 1 | eva | 1 | /* |
| 2 | * Copyright (c) Contributors, http://opensimulator.org/ |
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| 3 | * See CONTRIBUTORS.TXT for a full list of copyright holders. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions are met: |
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| 7 | * * Redistributions of source code must retain the above copyright |
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| 8 | * notice, this list of conditions and the following disclaimer. |
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| 9 | * * Redistributions in binary form must reproduce the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer in the |
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| 11 | * documentation and/or other materials provided with the distribution. |
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| 12 | * * Neither the name of the OpenSimulator Project nor the |
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| 13 | * names of its contributors may be used to endorse or promote products |
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| 14 | * derived from this software without specific prior written permission. |
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| 15 | * |
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY |
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| 17 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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| 18 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 19 | * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY |
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| 20 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 21 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 22 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 23 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
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| 25 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 26 | */ |
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| 27 | using OpenSim.Framework; |
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| 28 | using System.IO; |
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| 29 | |||
| 30 | namespace OpenSim.Framework.Servers.HttpServer |
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| 31 | { |
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| 32 | /// <summary> |
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| 33 | /// BaseStreamHandlerBasicDOSProtector Base streamed request handler. |
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| 34 | /// </summary> |
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| 35 | /// <remarks> |
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| 36 | /// Inheriting classes should override ProcessRequest() rather than Handle() |
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| 37 | /// </remarks> |
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| 38 | public abstract class BaseStreamHandlerBasicDOSProtector : BaseRequestHandler, IStreamedRequestHandler |
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| 39 | { |
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| 40 | |||
| 41 | private readonly BasicDosProtectorOptions _options; |
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| 42 | private readonly BasicDOSProtector _dosProtector; |
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| 43 | |||
| 44 | protected BaseStreamHandlerBasicDOSProtector(string httpMethod, string path, BasicDosProtectorOptions options) : this(httpMethod, path, null, null, options) {} |
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| 45 | |||
| 46 | protected BaseStreamHandlerBasicDOSProtector(string httpMethod, string path, string name, string description, BasicDosProtectorOptions options) |
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| 47 | : base(httpMethod, path, name, description) |
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| 48 | { |
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| 49 | _options = options; |
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| 50 | _dosProtector = new BasicDOSProtector(_options); |
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| 51 | } |
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| 52 | |||
| 53 | public virtual byte[] Handle( |
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| 54 | string path, Stream request, IOSHttpRequest httpRequest, IOSHttpResponse httpResponse) |
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| 55 | { |
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| 56 | byte[] result; |
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| 57 | RequestsReceived++; |
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| 58 | string clientstring = GetClientString(httpRequest); |
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| 59 | string endpoint = GetRemoteAddr(httpRequest); |
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| 60 | if (_dosProtector.Process(clientstring, endpoint)) |
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| 61 | result = ProcessRequest(path, request, httpRequest, httpResponse); |
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| 62 | else |
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| 63 | result = ThrottledRequest(path, request, httpRequest, httpResponse); |
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| 64 | if (_options.MaxConcurrentSessions > 0) |
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| 65 | _dosProtector.ProcessEnd(clientstring, endpoint); |
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| 66 | |||
| 67 | RequestsHandled++; |
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| 68 | |||
| 69 | return result; |
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| 70 | } |
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| 71 | |||
| 72 | protected virtual byte[] ProcessRequest( |
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| 73 | string path, Stream request, IOSHttpRequest httpRequest, IOSHttpResponse httpResponse) |
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| 74 | { |
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| 75 | return null; |
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| 76 | } |
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| 77 | |||
| 78 | protected virtual byte[] ThrottledRequest( |
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| 79 | string path, Stream request, IOSHttpRequest httpRequest, IOSHttpResponse httpResponse) |
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| 80 | { |
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| 81 | return new byte[0]; |
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| 82 | } |
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| 83 | |||
| 84 | |||
| 85 | private string GetRemoteAddr(IOSHttpRequest httpRequest) |
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| 86 | { |
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| 87 | string remoteaddr = string.Empty; |
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| 88 | if (httpRequest.Headers["remote_addr"] != null) |
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| 89 | remoteaddr = httpRequest.Headers["remote_addr"]; |
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| 90 | |||
| 91 | return remoteaddr; |
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| 92 | } |
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| 93 | |||
| 94 | private string GetClientString(IOSHttpRequest httpRequest) |
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| 95 | { |
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| 96 | string clientstring = string.Empty; |
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| 97 | |||
| 98 | if (_options.AllowXForwardedFor && httpRequest.Headers["x-forwarded-for"] != null) |
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| 99 | clientstring = httpRequest.Headers["x-forwarded-for"]; |
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| 100 | else |
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| 101 | clientstring = GetRemoteAddr(httpRequest); |
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| 102 | |||
| 103 | return clientstring; |
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| 104 | |||
| 105 | } |
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| 106 | } |
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| 107 | } |