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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
//
// System.Net.WebConnectionGroup
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ximian, Inc (http://www.ximian.com)
// Copyright 2011 Xamarin, Inc (http://www.xamarin.com)
//
//
// 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.Net.Configuration;
using System.Net.Sockets;
namespace System.Net
{
class WebConnectionGroup
{
ServicePoint sPoint;
string name;
ArrayList connections;
Random rnd;
Queue queue;
public WebConnectionGroup (ServicePoint sPoint, string name)
{
this.sPoint = sPoint;
this.name = name;
connections = new ArrayList (1);
queue = new Queue ();
}
public void Close ()
{
//TODO: what do we do with the queue? Empty it out and abort the requests?
//TODO: abort requests or wait for them to finish
lock (connections) {
WeakReference cncRef = null;
int end = connections.Count;
// ArrayList removed = null;
for (int i = 0; i < end; i++) {
cncRef = (WeakReference) connections [i];
WebConnection cnc = cncRef.Target as WebConnection;
if (cnc != null) {
cnc.Close (false);
}
}
connections.Clear ();
}
}
public WebConnection GetConnection (HttpWebRequest request)
{
WebConnection cnc = null;
lock (connections) {
WeakReference cncRef = null;
// Remove disposed connections
int end = connections.Count;
ArrayList removed = null;
for (int i = 0; i < end; i++) {
cncRef = (WeakReference) connections [i];
cnc = cncRef.Target as WebConnection;
if (cnc == null) {
if (removed == null)
removed = new ArrayList (1);
removed.Add (i);
}
}
if (removed != null) {
for (int i = removed.Count - 1; i >= 0; i--)
connections.RemoveAt ((int) removed [i]);
}
cnc = CreateOrReuseConnection (request);
}
return cnc;
}
static void PrepareSharingNtlm (WebConnection cnc, HttpWebRequest request)
{
if (!cnc.NtlmAuthenticated)
return;
bool needs_reset = false;
NetworkCredential cnc_cred = cnc.NtlmCredential;
bool isProxy = (request.Proxy != null && !request.Proxy.IsBypassed (request.RequestUri));
ICredentials req_icreds = (!isProxy) ? request.Credentials : request.Proxy.Credentials;
NetworkCredential req_cred = (req_icreds != null) ? req_icreds.GetCredential (request.RequestUri, "NTLM") : null;
if (cnc_cred == null || req_cred == null ||
cnc_cred.Domain != req_cred.Domain || cnc_cred.UserName != req_cred.UserName ||
cnc_cred.Password != req_cred.Password) {
needs_reset = true;
}
if (!needs_reset) {
bool req_sharing = request.UnsafeAuthenticatedConnectionSharing;
bool cnc_sharing = cnc.UnsafeAuthenticatedConnectionSharing;
needs_reset = (req_sharing == false || req_sharing != cnc_sharing);
}
if (needs_reset) {
cnc.Close (false); // closes the authenticated connection
cnc.ResetNtlm ();
}
}
WebConnection CreateOrReuseConnection (HttpWebRequest request)
{
// lock is up there.
WebConnection cnc;
WeakReference cncRef;
int count = connections.Count;
for (int i = 0; i < count; i++) {
WeakReference wr = connections [i] as WeakReference;
cnc = wr.Target as WebConnection;
if (cnc == null) {
connections.RemoveAt (i);
count--;
i--;
continue;
}
if (cnc.Busy)
continue;
PrepareSharingNtlm (cnc, request);
return cnc;
}
if (sPoint.ConnectionLimit > count) {
cnc = new WebConnection (this, sPoint);
connections.Add (new WeakReference (cnc));
return cnc;
}
if (rnd == null)
rnd = new Random ();
int idx = (count > 1) ? rnd.Next (0, count) : 0;
cncRef = (WeakReference) connections [idx];
cnc = cncRef.Target as WebConnection;
if (cnc == null) {
cnc = new WebConnection (this, sPoint);
connections.RemoveAt (idx);
connections.Add (new WeakReference (cnc));
}
return cnc;
}
public string Name {
get { return name; }
}
internal Queue Queue {
get { return queue; }
}
}
}
|
