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|
//
// System.Net.WebConnectionGroup
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003 Ximian, Inc (http://www.ximian.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;
NetworkCredential req_cred = request.Credentials.GetCredential (request.RequestUri, "NTLM");
if (cnc_cred.Domain != req_cred.Domain || cnc_cred.UserName != req_cred.UserName ||
cnc_cred.Password != req_cred.Password) {
needs_reset = true;
}
#if NET_1_1
if (!needs_reset) {
bool req_sharing = request.UnsafeAuthenticatedConnectionSharing;
bool cnc_sharing = cnc.UnsafeAuthenticatedConnectionSharing;
needs_reset = (req_sharing == false || req_sharing != cnc_sharing);
}
#endif
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 - 1) : 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; }
}
}
}
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