OpenSim
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Properties Events Macros
HeloServicesConnector.cs
Go to the documentation of this file.
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 
28 using log4net;
29 using System;
30 using System.Net;
31 using System.Reflection;
32 using Nini.Config;
33 
34 namespace OpenSim.Services.Connectors
35 {
36  public class HeloServicesConnector
37  {
38  private static readonly ILog m_log =
39  LogManager.GetLogger(
40  MethodBase.GetCurrentMethod().DeclaringType);
41 
42  private string m_ServerURI = String.Empty;
43 
45  {
46  }
47 
48  public HeloServicesConnector(string serverURI)
49  {
50  try
51  {
52  Uri uri;
53 
54  if (!serverURI.EndsWith("="))
55  {
56  // Let's check if this is a valid URI, because it may not be
57  uri = new Uri(serverURI);
58  m_ServerURI = serverURI.TrimEnd('/') + "/helo/";
59  }
60  else
61  {
62  // Simian sends malformed urls like this:
63  // http://valley.virtualportland.org/simtest/Grid/?id=
64  //
65  uri = new Uri(serverURI + "xxx");
66  if (uri.Query == string.Empty)
67  m_ServerURI = serverURI.TrimEnd('/') + "/helo/";
68  else
69  {
70  serverURI = serverURI + "xxx";
71  m_ServerURI = serverURI.Replace(uri.Query, "");
72  m_ServerURI = m_ServerURI.TrimEnd('/') + "/helo/";
73  }
74  }
75 
76  }
77  catch (UriFormatException)
78  {
79  m_log.WarnFormat("[HELO SERVICE]: Malformed URL {0}", serverURI);
80  }
81  }
82 
83  public virtual string Helo()
84  {
85  if (String.IsNullOrEmpty(m_ServerURI))
86  {
87  m_log.WarnFormat("[HELO SERVICE]: Unable to invoke HELO due to empty URL");
88  return String.Empty;
89  }
90 
91  try
92  {
93  HttpWebRequest req = (HttpWebRequest)HttpWebRequest.Create(m_ServerURI);
94  // Eventually we need to switch to HEAD
95  /* req.Method = "HEAD"; */
96 
97  using (WebResponse response = req.GetResponse())
98  {
99  if (response.Headers.Get("X-Handlers-Provided") == null) // just in case this ever returns a null
100  return string.Empty;
101  return response.Headers.Get("X-Handlers-Provided");
102  }
103  }
104  catch (Exception e)
105  {
106  m_log.DebugFormat("[HELO SERVICE]: Unable to perform HELO request to {0}: {1}", m_ServerURI, e.Message);
107  }
108 
109  // fail
110  return string.Empty;
111  }
112  }
113 }