517 lines
12 KiB
C#
517 lines
12 KiB
C#
//
|
|
// System.Net.ServicePoint
|
|
//
|
|
// Authors:
|
|
// Lawrence Pit (loz@cable.a2000.nl)
|
|
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
|
|
//
|
|
// (c) 2002 Lawrence Pit
|
|
// (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.Generic;
|
|
using System.Diagnostics;
|
|
using System.Collections;
|
|
using System.Net.Sockets;
|
|
using System.Security.Cryptography.X509Certificates;
|
|
using System.Threading;
|
|
|
|
namespace System.Net
|
|
{
|
|
public class ServicePoint
|
|
{
|
|
readonly Uri uri;
|
|
int connectionLimit;
|
|
int maxIdleTime;
|
|
int currentConnections;
|
|
DateTime idleSince;
|
|
DateTime lastDnsResolve;
|
|
Version protocolVersion;
|
|
IPHostEntry host;
|
|
bool usesProxy;
|
|
Dictionary<string,WebConnectionGroup> groups;
|
|
bool sendContinue = true;
|
|
bool useConnect;
|
|
object hostE = new object ();
|
|
bool useNagle;
|
|
BindIPEndPoint endPointCallback = null;
|
|
bool tcp_keepalive;
|
|
int tcp_keepalive_time;
|
|
int tcp_keepalive_interval;
|
|
Timer idleTimer;
|
|
|
|
// Constructors
|
|
|
|
internal ServicePoint (Uri uri, int connectionLimit, int maxIdleTime)
|
|
{
|
|
this.uri = uri;
|
|
this.connectionLimit = connectionLimit;
|
|
this.maxIdleTime = maxIdleTime;
|
|
this.currentConnections = 0;
|
|
this.idleSince = DateTime.UtcNow;
|
|
}
|
|
|
|
// Properties
|
|
|
|
public Uri Address {
|
|
get { return uri; }
|
|
}
|
|
|
|
static Exception GetMustImplement ()
|
|
{
|
|
return new NotImplementedException ();
|
|
}
|
|
|
|
public BindIPEndPoint BindIPEndPointDelegate
|
|
{
|
|
get { return endPointCallback; }
|
|
set { endPointCallback = value; }
|
|
}
|
|
|
|
[MonoTODO]
|
|
public int ConnectionLeaseTimeout
|
|
{
|
|
get {
|
|
throw GetMustImplement ();
|
|
}
|
|
set {
|
|
throw GetMustImplement ();
|
|
}
|
|
}
|
|
|
|
public int ConnectionLimit {
|
|
get { return connectionLimit; }
|
|
set {
|
|
if (value <= 0)
|
|
throw new ArgumentOutOfRangeException ();
|
|
|
|
connectionLimit = value;
|
|
}
|
|
}
|
|
|
|
public string ConnectionName {
|
|
get { return uri.Scheme; }
|
|
}
|
|
|
|
public int CurrentConnections {
|
|
get {
|
|
return currentConnections;
|
|
}
|
|
}
|
|
|
|
public DateTime IdleSince {
|
|
get {
|
|
return idleSince.ToLocalTime ();
|
|
}
|
|
}
|
|
|
|
public int MaxIdleTime {
|
|
get { return maxIdleTime; }
|
|
set {
|
|
if (value < Timeout.Infinite || value > Int32.MaxValue)
|
|
throw new ArgumentOutOfRangeException ();
|
|
|
|
lock (this) {
|
|
maxIdleTime = value;
|
|
if (idleTimer != null)
|
|
idleTimer.Change (maxIdleTime, maxIdleTime);
|
|
}
|
|
}
|
|
}
|
|
|
|
public virtual Version ProtocolVersion {
|
|
get { return protocolVersion; }
|
|
}
|
|
|
|
[MonoTODO]
|
|
public int ReceiveBufferSize
|
|
{
|
|
get {
|
|
throw GetMustImplement ();
|
|
}
|
|
set {
|
|
throw GetMustImplement ();
|
|
}
|
|
}
|
|
|
|
public bool SupportsPipelining {
|
|
get { return HttpVersion.Version11.Equals (protocolVersion); }
|
|
}
|
|
|
|
|
|
public bool Expect100Continue {
|
|
get { return SendContinue; }
|
|
set { SendContinue = value; }
|
|
}
|
|
|
|
public bool UseNagleAlgorithm {
|
|
get { return useNagle; }
|
|
set { useNagle = value; }
|
|
}
|
|
|
|
internal bool SendContinue {
|
|
get { return sendContinue &&
|
|
(protocolVersion == null || protocolVersion == HttpVersion.Version11); }
|
|
set { sendContinue = value; }
|
|
}
|
|
// Methods
|
|
|
|
public void SetTcpKeepAlive (bool enabled, int keepAliveTime, int keepAliveInterval)
|
|
{
|
|
if (enabled) {
|
|
if (keepAliveTime <= 0)
|
|
throw new ArgumentOutOfRangeException ("keepAliveTime", "Must be greater than 0");
|
|
if (keepAliveInterval <= 0)
|
|
throw new ArgumentOutOfRangeException ("keepAliveInterval", "Must be greater than 0");
|
|
}
|
|
|
|
tcp_keepalive = enabled;
|
|
tcp_keepalive_time = keepAliveTime;
|
|
tcp_keepalive_interval = keepAliveInterval;
|
|
}
|
|
|
|
internal void KeepAliveSetup (Socket socket)
|
|
{
|
|
if (!tcp_keepalive)
|
|
return;
|
|
|
|
byte [] bytes = new byte [12];
|
|
PutBytes (bytes, (uint) (tcp_keepalive ? 1 : 0), 0);
|
|
PutBytes (bytes, (uint) tcp_keepalive_time, 4);
|
|
PutBytes (bytes, (uint) tcp_keepalive_interval, 8);
|
|
socket.IOControl (IOControlCode.KeepAliveValues, bytes, null);
|
|
}
|
|
|
|
static void PutBytes (byte [] bytes, uint v, int offset)
|
|
{
|
|
if (BitConverter.IsLittleEndian) {
|
|
bytes [offset] = (byte) (v & 0x000000ff);
|
|
bytes [offset + 1] = (byte) ((v & 0x0000ff00) >> 8);
|
|
bytes [offset + 2] = (byte) ((v & 0x00ff0000) >> 16);
|
|
bytes [offset + 3] = (byte) ((v & 0xff000000) >> 24);
|
|
} else {
|
|
bytes [offset + 3] = (byte) (v & 0x000000ff);
|
|
bytes [offset + 2] = (byte) ((v & 0x0000ff00) >> 8);
|
|
bytes [offset + 1] = (byte) ((v & 0x00ff0000) >> 16);
|
|
bytes [offset] = (byte) ((v & 0xff000000) >> 24);
|
|
}
|
|
}
|
|
|
|
// Internal Methods
|
|
|
|
internal bool UsesProxy {
|
|
get { return usesProxy; }
|
|
set { usesProxy = value; }
|
|
}
|
|
|
|
internal bool UseConnect {
|
|
get { return useConnect; }
|
|
set { useConnect = value; }
|
|
}
|
|
|
|
WebConnectionGroup GetConnectionGroup (string name)
|
|
{
|
|
if (name == null)
|
|
name = "";
|
|
|
|
/*
|
|
* Optimization:
|
|
*
|
|
* In the vast majority of cases, we only have one single WebConnectionGroup per ServicePoint, so we
|
|
* don't need to allocate a dictionary.
|
|
*
|
|
*/
|
|
|
|
WebConnectionGroup group;
|
|
if (groups != null && groups.TryGetValue (name, out group))
|
|
return group;
|
|
|
|
group = new WebConnectionGroup (this, name);
|
|
group.ConnectionClosed += (s, e) => currentConnections--;
|
|
|
|
if (groups == null)
|
|
groups = new Dictionary<string, WebConnectionGroup> ();
|
|
groups.Add (name, group);
|
|
|
|
return group;
|
|
}
|
|
|
|
void RemoveConnectionGroup (WebConnectionGroup group)
|
|
{
|
|
if (groups == null || groups.Count == 0)
|
|
throw new InvalidOperationException ();
|
|
|
|
groups.Remove (group.Name);
|
|
}
|
|
|
|
bool CheckAvailableForRecycling (out DateTime outIdleSince)
|
|
{
|
|
outIdleSince = DateTime.MinValue;
|
|
|
|
TimeSpan idleTimeSpan;
|
|
List<WebConnectionGroup> groupList = null, removeList = null;
|
|
lock (this) {
|
|
if (groups == null || groups.Count == 0) {
|
|
idleSince = DateTime.MinValue;
|
|
return true;
|
|
}
|
|
|
|
idleTimeSpan = TimeSpan.FromMilliseconds (maxIdleTime);
|
|
|
|
/*
|
|
* WebConnectionGroup.TryRecycle() must run outside the lock, so we need to
|
|
* copy the group dictionary if it exists.
|
|
*
|
|
* In most cases, we only have a single connection group, so we can simply store
|
|
* that in a local variable instead of copying a collection.
|
|
*
|
|
*/
|
|
|
|
groupList = new List<WebConnectionGroup> (groups.Values);
|
|
}
|
|
|
|
foreach (var group in groupList) {
|
|
if (!group.TryRecycle (idleTimeSpan, ref outIdleSince))
|
|
continue;
|
|
if (removeList == null)
|
|
removeList = new List<WebConnectionGroup> ();
|
|
removeList.Add (group);
|
|
}
|
|
|
|
lock (this) {
|
|
idleSince = outIdleSince;
|
|
|
|
if (removeList != null && groups != null) {
|
|
foreach (var group in removeList)
|
|
if (groups.ContainsKey (group.Name))
|
|
RemoveConnectionGroup (group);
|
|
}
|
|
|
|
if (groups != null && groups.Count == 0)
|
|
groups = null;
|
|
|
|
if (groups == null) {
|
|
if (idleTimer != null) {
|
|
idleTimer.Dispose ();
|
|
idleTimer = null;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void IdleTimerCallback (object obj)
|
|
{
|
|
DateTime dummy;
|
|
CheckAvailableForRecycling (out dummy);
|
|
}
|
|
|
|
private bool HasTimedOut
|
|
{
|
|
get {
|
|
int timeout = ServicePointManager.DnsRefreshTimeout;
|
|
return timeout != Timeout.Infinite &&
|
|
(lastDnsResolve + TimeSpan.FromMilliseconds (timeout)) < DateTime.UtcNow;
|
|
}
|
|
}
|
|
|
|
internal IPHostEntry HostEntry
|
|
{
|
|
get {
|
|
lock (hostE) {
|
|
string uriHost = uri.Host;
|
|
|
|
// Cannot do DNS resolution on literal IP addresses
|
|
if (uri.HostNameType == UriHostNameType.IPv6 || uri.HostNameType == UriHostNameType.IPv4) {
|
|
if (host != null)
|
|
return host;
|
|
|
|
if (uri.HostNameType == UriHostNameType.IPv6) {
|
|
// Remove square brackets
|
|
uriHost = uriHost.Substring (1, uriHost.Length - 2);
|
|
}
|
|
|
|
// Creates IPHostEntry
|
|
host = new IPHostEntry();
|
|
host.AddressList = new IPAddress[] { IPAddress.Parse (uriHost) };
|
|
return host;
|
|
}
|
|
|
|
if (!HasTimedOut && host != null)
|
|
return host;
|
|
|
|
lastDnsResolve = DateTime.UtcNow;
|
|
|
|
try {
|
|
host = Dns.GetHostEntry (uriHost);
|
|
} catch {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
return host;
|
|
}
|
|
}
|
|
|
|
internal void SetVersion (Version version)
|
|
{
|
|
protocolVersion = version;
|
|
}
|
|
|
|
internal EventHandler SendRequest (HttpWebRequest request, string groupName)
|
|
{
|
|
WebConnection cnc;
|
|
|
|
lock (this) {
|
|
bool created;
|
|
WebConnectionGroup cncGroup = GetConnectionGroup (groupName);
|
|
cnc = cncGroup.GetConnection (request, out created);
|
|
if (created) {
|
|
++currentConnections;
|
|
if (idleTimer == null)
|
|
idleTimer = new Timer (IdleTimerCallback, null, maxIdleTime, maxIdleTime);
|
|
}
|
|
}
|
|
|
|
return cnc.SendRequest (request);
|
|
}
|
|
public bool CloseConnectionGroup (string connectionGroupName)
|
|
{
|
|
WebConnectionGroup cncGroup = null;
|
|
|
|
lock (this) {
|
|
cncGroup = GetConnectionGroup (connectionGroupName);
|
|
if (cncGroup != null) {
|
|
RemoveConnectionGroup (cncGroup);
|
|
}
|
|
}
|
|
|
|
// WebConnectionGroup.Close() must *not* be called inside the lock
|
|
if (cncGroup != null) {
|
|
cncGroup.Close ();
|
|
return true;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
//
|
|
// Copied from the referencesource
|
|
//
|
|
|
|
object m_ServerCertificateOrBytes;
|
|
object m_ClientCertificateOrBytes;
|
|
|
|
/// <devdoc>
|
|
/// <para>
|
|
/// Gets the certificate received for this <see cref='System.Net.ServicePoint'/>.
|
|
/// </para>
|
|
/// </devdoc>
|
|
public X509Certificate Certificate {
|
|
get {
|
|
object chkCert = m_ServerCertificateOrBytes;
|
|
if (chkCert != null && chkCert.GetType() == typeof(byte[]))
|
|
return (X509Certificate)(m_ServerCertificateOrBytes = new X509Certificate((byte[]) chkCert));
|
|
else
|
|
return chkCert as X509Certificate;
|
|
}
|
|
}
|
|
internal void UpdateServerCertificate(X509Certificate certificate)
|
|
{
|
|
if (certificate != null)
|
|
m_ServerCertificateOrBytes = certificate.GetRawCertData();
|
|
else
|
|
m_ServerCertificateOrBytes = null;
|
|
}
|
|
|
|
/// <devdoc>
|
|
/// <para>
|
|
/// Gets the Client Certificate sent by us to the Server.
|
|
/// </para>
|
|
/// </devdoc>
|
|
public X509Certificate ClientCertificate {
|
|
get {
|
|
object chkCert = m_ClientCertificateOrBytes;
|
|
if (chkCert != null && chkCert.GetType() == typeof(byte[]))
|
|
return (X509Certificate)(m_ClientCertificateOrBytes = new X509Certificate((byte[]) chkCert));
|
|
else
|
|
return chkCert as X509Certificate;
|
|
}
|
|
}
|
|
internal void UpdateClientCertificate(X509Certificate certificate)
|
|
{
|
|
if (certificate != null)
|
|
m_ClientCertificateOrBytes = certificate.GetRawCertData();
|
|
else
|
|
m_ClientCertificateOrBytes = null;
|
|
}
|
|
|
|
internal bool CallEndPointDelegate (Socket sock, IPEndPoint remote)
|
|
{
|
|
if (endPointCallback == null)
|
|
return true;
|
|
|
|
int count = 0;
|
|
for (;;) {
|
|
IPEndPoint local = null;
|
|
try {
|
|
local = endPointCallback (this,
|
|
remote, count);
|
|
} catch {
|
|
// This is to differentiate from an
|
|
// OverflowException, which should propagate.
|
|
return false;
|
|
}
|
|
|
|
if (local == null)
|
|
return true;
|
|
|
|
try {
|
|
sock.Bind (local);
|
|
} catch (SocketException) {
|
|
// This is intentional; the docs say
|
|
// that if the Bind fails, we keep
|
|
// going until there is an
|
|
// OverflowException on the retry
|
|
// count.
|
|
checked { ++count; }
|
|
continue;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
}
|
|
|
|
internal Socket GetConnection(PooledStream PooledStream, object owner, bool async, out IPAddress address, ref Socket abortSocket, ref Socket abortSocket6)
|
|
{
|
|
throw new NotImplementedException ();
|
|
}
|
|
}
|
|
}
|
|
|
|
|