2 // System.Net.GlobalProxySelection
5 // Lawrence Pit (loz@cable.a2000.nl)
9 // Permission is hereby granted, free of charge, to any person obtaining
10 // a copy of this software and associated documentation files (the
11 // "Software"), to deal in the Software without restriction, including
12 // without limitation the rights to use, copy, modify, merge, publish,
13 // distribute, sublicense, and/or sell copies of the Software, and to
14 // permit persons to whom the Software is furnished to do so, subject to
15 // the following conditions:
17 // The above copyright notice and this permission notice shall be
18 // included in all copies or substantial portions of the Software.
20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
30 using System.Collections;
31 using System.Configuration;
33 using System.Runtime.Serialization;
35 using System.Net.Configuration;
41 [ObsoleteAttribute("Use WebRequest.DefaultProxy instead")]
43 public class GlobalProxySelection
46 public GlobalProxySelection() { }
51 volatile static IWebProxy proxy;
52 static readonly object lockobj = new object ();
54 static IWebProxy GetProxy ()
60 object p = ConfigurationSettings.GetConfig ("system.net/defaultProxy");
62 p = new EmptyWebProxy ();
63 proxy = (IWebProxy) p;
70 public static IWebProxy Select {
72 get { return WebRequest.DefaultWebProxy; }
73 set { WebRequest.DefaultWebProxy = value; }
75 get { return GetProxy (); }
78 throw new ArgumentNullException ("GlobalProxySelection.Select",
79 "null IWebProxy not allowed. Use GetEmptyWebProxy ()");
87 public static IWebProxy GetEmptyWebProxy()
89 // must return a new one each time, as the credentials
91 return new EmptyWebProxy ();
96 internal class EmptyWebProxy : IWebProxy {
97 private ICredentials credentials = null;
99 internal EmptyWebProxy () { }
101 public ICredentials Credentials {
102 get { return credentials; }
103 set { credentials = value; }
106 public Uri GetProxy (Uri destination)
111 public bool IsBypassed (Uri host)
113 return true; // pass directly to host