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1/*
2* Copyright (c) Contributors, http://www.openmetaverse.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*/
28namespace Nwc.XmlRpc
29{
30 using System;
31 using System.IO;
32 using System.Net.Sockets;
33 using System.Collections;
34 using System.Text;
35
36 ///<summary>Very basic HTTP request handler.</summary>
37 ///<remarks>This class is designed to accept a TcpClient and treat it as an HTTP request.
38 /// It will do some basic header parsing and manage the input and output streams associated
39 /// with the request.</remarks>
40 public class SimpleHttpRequest
41 {
42 private String _httpMethod = null;
43 private String _protocol;
44 private String _filePathFile = null;
45 private String _filePathDir = null;
46 private String __filePath;
47 private TcpClient _client;
48 private StreamReader _input;
49 private StreamWriter _output;
50 private Hashtable _headers;
51
52 /// <summary>A constructor which accepts the TcpClient.</summary>
53 /// <remarks>It creates the associated input and output streams, determines the request type,
54 /// and parses the remaining HTTP header.</remarks>
55 /// <param name="client">The <c>TcpClient</c> associated with the HTTP connection.</param>
56 public SimpleHttpRequest(TcpClient client)
57 {
58 _client = client;
59
60 _output = new StreamWriter(client.GetStream() );
61 _input = new StreamReader(client.GetStream() );
62
63 GetRequestMethod();
64 GetRequestHeaders();
65 }
66
67 /// <summary>The output <c>StreamWriter</c> associated with the request.</summary>
68 public StreamWriter Output
69 {
70 get { return _output; }
71 }
72
73 /// <summary>The input <c>StreamReader</c> associated with the request.</summary>
74 public StreamReader Input
75 {
76 get { return _input; }
77 }
78
79 /// <summary>The <c>TcpClient</c> with the request.</summary>
80 public TcpClient Client
81 {
82 get { return _client; }
83 }
84
85 private String _filePath
86 {
87 get { return __filePath; }
88 set
89 {
90 __filePath = value;
91 _filePathDir = null;
92 _filePathFile = null;
93 }
94 }
95
96 /// <summary>The type of HTTP request (i.e. PUT, GET, etc.).</summary>
97 public String HttpMethod
98 {
99 get { return _httpMethod; }
100 }
101
102 /// <summary>The level of the HTTP protocol.</summary>
103 public String Protocol
104 {
105 get { return _protocol; }
106 }
107
108 /// <summary>The "path" which is part of any HTTP request.</summary>
109 public String FilePath
110 {
111 get { return _filePath; }
112 }
113
114 /// <summary>The file portion of the "path" which is part of any HTTP request.</summary>
115 public String FilePathFile
116 {
117 get
118 {
119 if (_filePathFile != null)
120 return _filePathFile;
121
122 int i = FilePath.LastIndexOf("/");
123
124 if (i == -1)
125 return "";
126
127 i++;
128 _filePathFile = FilePath.Substring(i, FilePath.Length - i);
129 return _filePathFile;
130 }
131 }
132
133 /// <summary>The directory portion of the "path" which is part of any HTTP request.</summary>
134 public String FilePathDir
135 {
136 get
137 {
138 if (_filePathDir != null)
139 return _filePathDir;
140
141 int i = FilePath.LastIndexOf("/");
142
143 if (i == -1)
144 return "";
145
146 i++;
147 _filePathDir = FilePath.Substring(0, i);
148 return _filePathDir;
149 }
150 }
151
152 private void GetRequestMethod()
153 {
154 string req = _input.ReadLine();
155 if (req == null)
156 throw new ApplicationException("Void request.");
157
158 if (0 == String.Compare("GET ", req.Substring(0, 4), true))
159 _httpMethod = "GET";
160 else if (0 == String.Compare("POST ", req.Substring(0, 5), true))
161 _httpMethod = "POST";
162 else
163 throw new InvalidOperationException("Unrecognized method in query: " + req);
164
165 req = req.TrimEnd();
166 int idx = req.IndexOf(' ') + 1;
167 if (idx >= req.Length)
168 throw new ApplicationException("What do you want?");
169
170 string page_protocol = req.Substring(idx);
171 int idx2 = page_protocol.IndexOf(' ');
172 if (idx2 == -1)
173 idx2 = page_protocol.Length;
174
175 _filePath = page_protocol.Substring(0, idx2).Trim();
176 _protocol = page_protocol.Substring(idx2).Trim();
177 }
178
179 private void GetRequestHeaders()
180 {
181 String line;
182 int idx;
183
184 _headers = new Hashtable();
185
186 while ((line = _input.ReadLine()) != "")
187 {
188 if (line == null)
189 {
190 break;
191 }
192
193 idx = line.IndexOf(':');
194 if (idx == -1 || idx == line.Length - 1)
195 {
196 Logger.WriteEntry("Malformed header line: " + line, LogLevel.Information);
197 continue;
198 }
199
200 String key = line.Substring(0, idx);
201 String value = line.Substring(idx + 1);
202
203 try
204 {
205 _headers.Add(key, value);
206 }
207 catch (Exception)
208 {
209 Logger.WriteEntry("Duplicate header key in line: " + line, LogLevel.Information);
210 }
211 }
212 }
213
214 /// <summary>
215 /// Format the object contents into a useful string representation.
216 /// </summary>
217 ///<returns><c>String</c> representation of the <c>SimpleHttpRequest</c> as the <i>HttpMethod FilePath Protocol</i>.</returns>
218 override public String ToString()
219 {
220 return HttpMethod + " " + FilePath + " " + Protocol;
221 }
222
223 /// <summary>
224 /// Close the <c>SimpleHttpRequest</c>. This flushes and closes all associated io streams.
225 /// </summary>
226 public void Close()
227 {
228 _output.Flush();
229 _output.Close();
230 _input.Close();
231 _client.Close();
232 }
233 }
234}
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