1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
//
// System.Net.GlobalProxySelection
//
// Author:
// Lawrence Pit (loz@cable.a2000.nl)
//
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Collections;
using System.Configuration;
using System.IO;
using System.Runtime.Serialization;
namespace System.Net
{
public class GlobalProxySelection
{
private static IWebProxy proxy;
// Constructors
public GlobalProxySelection() { }
// Properties
static IWebProxy GetProxy ()
{
if (proxy != null)
return proxy;
lock (typeof (GlobalProxySelection)) {
if (proxy != null)
return proxy;
object p = ConfigurationSettings.GetConfig ("system.net/defaultProxy");
if (p == null)
p = new EmptyWebProxy ();
proxy = (IWebProxy) p;
}
return proxy;
}
public static IWebProxy Select {
get { return GetProxy (); }
set {
if (value == null)
throw new ArgumentNullException ("GlobalProxySelection.Select",
"null IWebProxy not allowed. Use GetEmptyWebProxy ()");
lock (typeof (GlobalProxySelection))
proxy = value;
}
}
// Methods
public static IWebProxy GetEmptyWebProxy()
{
// must return a new one each time, as the credentials
// can be set
return new EmptyWebProxy ();
}
// Internal Classes
internal class EmptyWebProxy : IWebProxy {
private ICredentials credentials = null;
internal EmptyWebProxy () { }
public ICredentials Credentials {
get { return credentials; }
set { credentials = value; }
}
public Uri GetProxy (Uri destination)
{
return destination;
}
public bool IsBypassed (Uri host)
{
return true; // pass directly to host
}
}
}
}
|
