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-rw-r--r--OpenSim/Framework/Servers/HttpServer/OSHttpHandler.cs183
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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 OpenSim 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;
30using System.IO;
31using System.Text.RegularExpressions;
32
33namespace OpenSim.Framework.Servers.HttpServer
34{
35 /// <sumary>
36 /// Any OSHttpHandler must return one of the following results:
37 /// <list type = "table">
38 /// <listheader>
39 /// <term>result code</term>
40 /// <description>meaning</description>
41 /// </listheader>
42 /// <item>
43 /// <term>Pass</term>
44 /// <description>handler did not process the request</request>
45 /// </item>
46 /// <item>
47 /// <term>Done</term>
48 /// <description>handler did process the request, OSHttpServer
49 /// can clean up and close the request</request>
50 /// </item>
51 /// </list>
52 /// </summary>
53 public enum OSHttpHandlerResult
54 {
55 Unprocessed,
56 Pass,
57 Done,
58 }
59
60 /// <summary>
61 /// An OSHttpHandler that matches on the "content-type" header can
62 /// supply an OSHttpContentTypeChecker delegate which will be
63 /// invoked by the request matcher in OSHttpRequestPump.
64 /// </summary>
65 /// <returns>true if the handler is interested in the content;
66 /// false otherwise</returns>
67 public delegate bool OSHttpContentTypeChecker(OSHttpRequest req);
68
69 public abstract class OSHttpHandler
70 {
71 /// <summary>
72 /// Regular expression used to match against method of
73 /// the incoming HTTP request. If you want to match any string
74 /// either use '.*' or null. To match on the empty string use
75 /// '^$'.
76 /// </summary>
77 public virtual Regex Method
78 {
79 get { return _method; }
80 }
81 protected Regex _method;
82
83 /// <summary>
84 /// Regular expression used to match against path of the
85 /// incoming HTTP request. If you want to match any string
86 /// either use '.*' or null. To match on the emtpy string use
87 /// '^$'.
88 /// </summary>
89 public virtual Regex Path
90 {
91 get { return _path; }
92 }
93 protected Regex _path;
94
95 /// <summary>
96 /// Dictionary of (query name, regular expression) tuples,
97 /// allowing us to match on URI query fields.
98 /// </summary>
99 public virtual Dictionary<string, Regex> Query
100 {
101 get { return _query; }
102 }
103 protected Dictionary<string, Regex> _query;
104
105 /// <summary>
106 /// Dictionary of (header name, regular expression) tuples,
107 /// allowing us to match on HTTP header fields.
108 /// </summary>
109 public virtual Dictionary<string, Regex> Headers
110 {
111 get { return _headers; }
112 }
113 protected Dictionary<string, Regex> _headers;
114
115 /// <summary>
116 /// Dictionary of (header name, regular expression) tuples,
117 /// allowing us to match on HTTP header fields.
118 /// </summary>
119 /// <remarks>
120 /// This feature is currently not implemented as it requires
121 /// (trivial) changes to HttpServer.HttpListener that have not
122 /// been implemented.
123 /// </remarks>
124 public virtual Regex IPEndPointWhitelist
125 {
126 get { return _ipEndPointRegex; }
127 }
128 protected Regex _ipEndPointRegex;
129
130
131 /// <summary>
132 /// Base class constructor.
133 /// </summary>
134 /// <param name="path">null or path regex</param>
135 /// <param name="headers">null or dictionary of header
136 /// regexs</param>
137 /// <param name="contentType">null or content type
138 /// regex</param>
139 /// <param name="whitelist">null or IP address regex</param>
140 public OSHttpHandler(Regex method, Regex path, Dictionary<string, Regex> query,
141 Dictionary<string, Regex> headers, Regex contentType, Regex whitelist)
142 {
143 _method = method;
144 _path = path;
145 _query = query;
146 _ipEndPointRegex = whitelist;
147
148 if (null == _headers && null != contentType)
149 {
150 _headers = new Dictionary<string, Regex>();
151 _headers.Add("content-type", contentType);
152 }
153 }
154
155
156 /// <summary>
157 /// Process an incoming OSHttpRequest that matched our
158 /// requirements.
159 /// </summary>
160 /// <returns>
161 /// OSHttpHandlerResult.Pass if we are after all not
162 /// interested in the request; OSHttpHandlerResult.Done if we
163 /// did process the request.
164 /// </returns>
165 public abstract OSHttpHandlerResult Process(OSHttpRequest request);
166
167 public override string ToString()
168 {
169 StringWriter sw = new StringWriter();
170 sw.WriteLine("{0}", base.ToString());
171 sw.WriteLine(" method regex {0}", null == Method ? "null" : Method.ToString());
172 sw.WriteLine(" path regex {0}", null == Path ? "null": Path.ToString());
173 foreach (string tag in Headers.Keys)
174 {
175 sw.WriteLine(" header {0} : {1}", tag, Headers[tag].ToString());
176 }
177 sw.WriteLine(" IP whitelist {0}", null == IPEndPointWhitelist ? "null" : IPEndPointWhitelist.ToString());
178 sw.WriteLine();
179 sw.Close();
180 return sw.ToString();
181 }
182 }
183}