Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / whidbey / netfxsp / ndp / fx / src / Net / System / Net / _ProxyChain.cs / 1 / _ProxyChain.cs
//------------------------------------------------------------------------------ //// Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net { using System.Collections; using System.Collections.Generic; internal interface IAutoWebProxy : IWebProxy { ProxyChain GetProxies(Uri destination); } internal abstract class ProxyChain : IEnumerable, IDisposable { private List m_Cache = new List (); private bool m_CacheComplete; private ProxyEnumerator m_MainEnumerator; private Uri m_Destination; private HttpAbortDelegate m_HttpAbortDelegate; protected ProxyChain(Uri destination) { m_Destination = destination; } public IEnumerator GetEnumerator() { ProxyEnumerator enumerator = new ProxyEnumerator(this); if (m_MainEnumerator == null) { m_MainEnumerator = enumerator; } return enumerator; } IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); } public virtual void Dispose() { } internal IEnumerator Enumerator { get { return m_MainEnumerator == null ? GetEnumerator() : m_MainEnumerator; } } internal Uri Destination { get { return m_Destination; } } // MoveNext can be time-consuming (download proxy script). This lets you abort it. internal virtual void Abort() { } internal bool HttpAbort(HttpWebRequest request, WebException webException) { Abort(); return true; } internal HttpAbortDelegate HttpAbortDelegate { get { if (m_HttpAbortDelegate == null) { m_HttpAbortDelegate = new HttpAbortDelegate(HttpAbort); } return m_HttpAbortDelegate; } } protected abstract bool GetNextProxy(out Uri proxy); // This implementation prevents DIRECT (null) from being returned more than once. private class ProxyEnumerator : IEnumerator { private ProxyChain m_Chain; private bool m_Finished; private int m_CurrentIndex = -1; private bool m_TriedDirect; internal ProxyEnumerator(ProxyChain chain) { m_Chain = chain; } public Uri Current { get { if (m_Finished || m_CurrentIndex < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_EnumOpCantHappen)); } GlobalLog.Assert(m_Chain.m_Cache.Count > m_CurrentIndex, "ProxyEnumerator::Current|Not all proxies made it to the cache."); return m_Chain.m_Cache[m_CurrentIndex]; } } object IEnumerator.Current { get { return Current; } } public bool MoveNext() { if (m_Finished) { return false; } checked{m_CurrentIndex++;} if (m_Chain.m_Cache.Count > m_CurrentIndex) { return true; } if (m_Chain.m_CacheComplete) { m_Finished = true; return false; } lock (m_Chain.m_Cache) { if (m_Chain.m_Cache.Count > m_CurrentIndex) { return true; } if (m_Chain.m_CacheComplete) { m_Finished = true; return false; } Uri nextProxy; while (true) { if (!m_Chain.GetNextProxy(out nextProxy)) { m_Finished = true; m_Chain.m_CacheComplete = true; return false; } if (nextProxy == null) { if (m_TriedDirect) { continue; } m_TriedDirect = true; } break; } m_Chain.m_Cache.Add(nextProxy); GlobalLog.Assert(m_Chain.m_Cache.Count > m_CurrentIndex, "ProxyEnumerator::MoveNext|Not all proxies made it to the cache."); return true; } } public void Reset() { m_Finished = false; m_CurrentIndex = -1; } public void Dispose() { } } } // This class implements failover logic for proxy scripts. internal class ProxyScriptChain : ProxyChain { private WebProxy m_Proxy; private Uri[] m_ScriptProxies; private int m_CurrentIndex; private int m_SyncStatus; internal ProxyScriptChain(WebProxy proxy, Uri destination) : base(destination) { m_Proxy = proxy; } protected override bool GetNextProxy(out Uri proxy) { if (m_CurrentIndex < 0) { proxy = null; return false; } if (m_CurrentIndex == 0) { AutoWebProxyState state; m_ScriptProxies = m_Proxy.GetProxiesAuto(Destination, out state, ref m_SyncStatus); if (state != AutoWebProxyState.ExecutionSuccess) { m_ScriptProxies = null; } } if (m_ScriptProxies == null || m_CurrentIndex >= m_ScriptProxies.Length) { proxy = m_Proxy.GetProxyAutoFailover(Destination); m_CurrentIndex = -1; return true; } proxy = m_ScriptProxies[m_CurrentIndex++]; return true; } internal override void Abort() { m_Proxy.AbortGetProxiesAuto(ref m_SyncStatus); } } // This class says to use no proxy. internal class DirectProxy : ProxyChain { private bool m_ProxyRetrieved; internal DirectProxy(Uri destination) : base(destination) { } protected override bool GetNextProxy(out Uri proxy) { proxy = null; if (m_ProxyRetrieved) { return false; } m_ProxyRetrieved = true; return true; } } // This class says to use a single fixed proxy. internal class StaticProxy : ProxyChain { private Uri m_Proxy; internal StaticProxy(Uri destination, Uri proxy) : base(destination) { if (proxy == null) { throw new ArgumentNullException("proxy"); } m_Proxy = proxy; } protected override bool GetNextProxy(out Uri proxy) { proxy = m_Proxy; if (proxy == null) { return false; } m_Proxy = null; return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. //------------------------------------------------------------------------------ // // Copyright (c) Microsoft Corporation. All rights reserved. // //----------------------------------------------------------------------------- namespace System.Net { using System.Collections; using System.Collections.Generic; internal interface IAutoWebProxy : IWebProxy { ProxyChain GetProxies(Uri destination); } internal abstract class ProxyChain : IEnumerable, IDisposable { private List m_Cache = new List (); private bool m_CacheComplete; private ProxyEnumerator m_MainEnumerator; private Uri m_Destination; private HttpAbortDelegate m_HttpAbortDelegate; protected ProxyChain(Uri destination) { m_Destination = destination; } public IEnumerator GetEnumerator() { ProxyEnumerator enumerator = new ProxyEnumerator(this); if (m_MainEnumerator == null) { m_MainEnumerator = enumerator; } return enumerator; } IEnumerator IEnumerable.GetEnumerator() { return GetEnumerator(); } public virtual void Dispose() { } internal IEnumerator Enumerator { get { return m_MainEnumerator == null ? GetEnumerator() : m_MainEnumerator; } } internal Uri Destination { get { return m_Destination; } } // MoveNext can be time-consuming (download proxy script). This lets you abort it. internal virtual void Abort() { } internal bool HttpAbort(HttpWebRequest request, WebException webException) { Abort(); return true; } internal HttpAbortDelegate HttpAbortDelegate { get { if (m_HttpAbortDelegate == null) { m_HttpAbortDelegate = new HttpAbortDelegate(HttpAbort); } return m_HttpAbortDelegate; } } protected abstract bool GetNextProxy(out Uri proxy); // This implementation prevents DIRECT (null) from being returned more than once. private class ProxyEnumerator : IEnumerator { private ProxyChain m_Chain; private bool m_Finished; private int m_CurrentIndex = -1; private bool m_TriedDirect; internal ProxyEnumerator(ProxyChain chain) { m_Chain = chain; } public Uri Current { get { if (m_Finished || m_CurrentIndex < 0) { throw new InvalidOperationException(SR.GetString(SR.InvalidOperation_EnumOpCantHappen)); } GlobalLog.Assert(m_Chain.m_Cache.Count > m_CurrentIndex, "ProxyEnumerator::Current|Not all proxies made it to the cache."); return m_Chain.m_Cache[m_CurrentIndex]; } } object IEnumerator.Current { get { return Current; } } public bool MoveNext() { if (m_Finished) { return false; } checked{m_CurrentIndex++;} if (m_Chain.m_Cache.Count > m_CurrentIndex) { return true; } if (m_Chain.m_CacheComplete) { m_Finished = true; return false; } lock (m_Chain.m_Cache) { if (m_Chain.m_Cache.Count > m_CurrentIndex) { return true; } if (m_Chain.m_CacheComplete) { m_Finished = true; return false; } Uri nextProxy; while (true) { if (!m_Chain.GetNextProxy(out nextProxy)) { m_Finished = true; m_Chain.m_CacheComplete = true; return false; } if (nextProxy == null) { if (m_TriedDirect) { continue; } m_TriedDirect = true; } break; } m_Chain.m_Cache.Add(nextProxy); GlobalLog.Assert(m_Chain.m_Cache.Count > m_CurrentIndex, "ProxyEnumerator::MoveNext|Not all proxies made it to the cache."); return true; } } public void Reset() { m_Finished = false; m_CurrentIndex = -1; } public void Dispose() { } } } // This class implements failover logic for proxy scripts. internal class ProxyScriptChain : ProxyChain { private WebProxy m_Proxy; private Uri[] m_ScriptProxies; private int m_CurrentIndex; private int m_SyncStatus; internal ProxyScriptChain(WebProxy proxy, Uri destination) : base(destination) { m_Proxy = proxy; } protected override bool GetNextProxy(out Uri proxy) { if (m_CurrentIndex < 0) { proxy = null; return false; } if (m_CurrentIndex == 0) { AutoWebProxyState state; m_ScriptProxies = m_Proxy.GetProxiesAuto(Destination, out state, ref m_SyncStatus); if (state != AutoWebProxyState.ExecutionSuccess) { m_ScriptProxies = null; } } if (m_ScriptProxies == null || m_CurrentIndex >= m_ScriptProxies.Length) { proxy = m_Proxy.GetProxyAutoFailover(Destination); m_CurrentIndex = -1; return true; } proxy = m_ScriptProxies[m_CurrentIndex++]; return true; } internal override void Abort() { m_Proxy.AbortGetProxiesAuto(ref m_SyncStatus); } } // This class says to use no proxy. internal class DirectProxy : ProxyChain { private bool m_ProxyRetrieved; internal DirectProxy(Uri destination) : base(destination) { } protected override bool GetNextProxy(out Uri proxy) { proxy = null; if (m_ProxyRetrieved) { return false; } m_ProxyRetrieved = true; return true; } } // This class says to use a single fixed proxy. internal class StaticProxy : ProxyChain { private Uri m_Proxy; internal StaticProxy(Uri destination, Uri proxy) : base(destination) { if (proxy == null) { throw new ArgumentNullException("proxy"); } m_Proxy = proxy; } protected override bool GetNextProxy(out Uri proxy) { proxy = m_Proxy; if (proxy == null) { return false; } m_Proxy = null; return true; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
Link Menu
This book is available now!
Buy at Amazon US or
Buy at Amazon UK
- EnlistmentState.cs
- QueryCacheManager.cs
- rsa.cs
- UserInitiatedRoutedEventPermissionAttribute.cs
- XmlSchemas.cs
- xdrvalidator.cs
- EntityProviderFactory.cs
- BuilderElements.cs
- Repeater.cs
- TextServicesCompartmentContext.cs
- Interlocked.cs
- BoundingRectTracker.cs
- LongValidatorAttribute.cs
- PartialArray.cs
- GridViewColumnHeader.cs
- DocumentApplication.cs
- FullTextLine.cs
- Quaternion.cs
- FileStream.cs
- TypeDescriptor.cs
- XmlTextAttribute.cs
- XmlLinkedNode.cs
- DbgCompiler.cs
- COM2ICategorizePropertiesHandler.cs
- StateItem.cs
- Command.cs
- Transactions.cs
- ObjectParameter.cs
- IPAddress.cs
- ExpressionBindingsDialog.cs
- LassoHelper.cs
- ParsedAttributeCollection.cs
- QuaternionRotation3D.cs
- FigureHelper.cs
- ProtocolsConfiguration.cs
- LocalValueEnumerator.cs
- Transform.cs
- WizardStepBase.cs
- Adorner.cs
- ObjectConverter.cs
- BaseProcessor.cs
- UnsafeNativeMethods.cs
- TextOnlyOutput.cs
- EncoderParameter.cs
- Splitter.cs
- RSAPKCS1SignatureFormatter.cs
- HttpWebRequestElement.cs
- SweepDirectionValidation.cs
- BaseAddressElement.cs
- TypeConstant.cs
- Attachment.cs
- mansign.cs
- RSAPKCS1SignatureFormatter.cs
- ZipFileInfo.cs
- CodeCompiler.cs
- TextCompositionManager.cs
- DataControlExtensions.cs
- AmbiguousMatchException.cs
- HttpConfigurationContext.cs
- MemberCollection.cs
- XmlSchemaComplexType.cs
- PixelShader.cs
- LoginAutoFormat.cs
- DateTimeFormatInfo.cs
- ColumnHeaderCollectionEditor.cs
- SchemaConstraints.cs
- FormatConvertedBitmap.cs
- CoreSwitches.cs
- XamlStyleSerializer.cs
- safelinkcollection.cs
- Help.cs
- DbCommandTree.cs
- Monitor.cs
- RegexCharClass.cs
- InstanceNotReadyException.cs
- ResourceDefaultValueAttribute.cs
- AuthenticationSection.cs
- HttpWebRequest.cs
- TypeConverterAttribute.cs
- OdbcConnectionFactory.cs
- RemoteWebConfigurationHostServer.cs
- HandlerBase.cs
- EventRecordWrittenEventArgs.cs
- XmlCodeExporter.cs
- TableAutomationPeer.cs
- LassoSelectionBehavior.cs
- SqlNotificationRequest.cs
- FormatSelectingMessageInspector.cs
- HttpEncoder.cs
- CompilationLock.cs
- ReplyChannelBinder.cs
- StoreContentChangedEventArgs.cs
- EntityViewGenerator.cs
- TextEndOfLine.cs
- SqlNodeAnnotation.cs
- ClientRoleProvider.cs
- EntityDataSourceDesignerHelper.cs
- BaseCollection.cs
- PartialArray.cs
- SchemaContext.cs