Code:
/ WCF / WCF / 3.5.30729.1 / untmp / Orcas / SP / ndp / cdf / src / WCF / ServiceModel / System / ServiceModel / ComIntegration / ComPlusInstanceProvider.cs / 1 / ComPlusInstanceProvider.cs
//------------------------------------------------------------------------------ // Copyright (c) Microsoft Corporation. All rights reserved. //----------------------------------------------------------------------------- namespace System.ServiceModel.ComIntegration { using System; using System.ServiceModel.Channels; using System.ServiceModel.Dispatcher; using System.Diagnostics; using System.EnterpriseServices; using System.Runtime.InteropServices; using System.IdentityModel.Claims; using System.IdentityModel.Policy; using System.Security.Principal; using System.ServiceModel; using System.ServiceModel.Diagnostics; using SafeCloseHandle = System.IdentityModel.SafeCloseHandle; class ComPlusInstanceProvider : IInstanceProvider { ServiceInfo info; static readonly Guid IID_IUnknown = new Guid("00000000-0000-0000-C000-000000000046"); public ComPlusInstanceProvider(ServiceInfo info) { this.info = info; } public object GetInstance(InstanceContext instanceContext) { throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidOperationException(SR.GetString(SR.ComPlusInstanceProviderRequiresMessage0))); } public object GetInstance(InstanceContext instanceContext, Message message) { object result = null; Guid incomingTransactionID = Guid.Empty; if (ContextUtil.IsInTransaction) incomingTransactionID = ContextUtil.TransactionId; ComPlusInstanceCreationTrace.Trace(TraceEventType.Verbose, TraceCode.ComIntegrationInstanceCreationRequest, SR.TraceCodeComIntegrationInstanceCreationRequest, this.info, message, incomingTransactionID); WindowsIdentity callerIdentity = null; callerIdentity = MessageUtil.GetMessageIdentity(message); WindowsImpersonationContext impersonateContext = null; try { try { if (this.info.HostingMode == HostingMode.WebHostOutOfProcess) { if (SecurityUtils.IsAtleastImpersonationToken(new SafeCloseHandle(callerIdentity.Token, false))) impersonateContext = callerIdentity.Impersonate(); else throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new COMException (SR.GetString(SR.BadImpersonationLevelForOutOfProcWas), HR.ERROR_BAD_IMPERSONATION_LEVEL)); } CLSCTX clsctx = CLSCTX.SERVER; if (PlatformSupportsBitness && (this.info.HostingMode == HostingMode.WebHostOutOfProcess)) { if (this.info.Bitness == Bitness.Bitness32) { clsctx |= CLSCTX.ACTIVATE_32_BIT_SERVER; } else { clsctx |= CLSCTX.ACTIVATE_64_BIT_SERVER; } } result = SafeNativeMethods.CoCreateInstance( info.Clsid, null, clsctx, IID_IUnknown); } finally { if (impersonateContext != null) impersonateContext.Undo(); } } catch (Exception e) { if (DiagnosticUtility.IsFatal(e)) throw; Uri from = null; if (message.Headers.From != null) from = message.Headers.From.Uri; DiagnosticUtility.EventLog.LogEvent(TraceEventType.Error, EventLogCategory.ComPlus, EventLogEventId.ComPlusInstanceCreationError, from == null ? string.Empty : from.ToString(), this.info.AppID.ToString(), this.info.Clsid.ToString(), incomingTransactionID.ToString(), callerIdentity.Name, e.ToString()); throw TraceUtility.ThrowHelperError(e, message); } TransactionProxy proxy = instanceContext.Extensions.Find(); if (proxy != null) { proxy.InstanceID = result.GetHashCode(); } ComPlusInstanceCreationTrace.Trace(TraceEventType.Verbose, TraceCode.ComIntegrationInstanceCreationSuccess, SR.TraceCodeComIntegrationInstanceCreationSuccess, this.info, message, result.GetHashCode(), incomingTransactionID); return result; } public void ReleaseInstance(InstanceContext instanceContext, object instance) { int instanceID = instance.GetHashCode(); IDisposable disposable = instance as IDisposable; if (disposable != null) { disposable.Dispose(); } else { // All ServicedComponents are disposable, so we don't // have to worry about getting a ServicedComponent // here. // Marshal.ReleaseComObject(instance); } ComPlusInstanceCreationTrace.Trace(TraceEventType.Verbose, TraceCode.ComIntegrationInstanceReleased, SR.TraceCodeComIntegrationInstanceReleased, this.info, instanceContext, instanceID); } static bool platformSupportsBitness; static bool platformSupportsBitnessSet; static bool PlatformSupportsBitness { get { if (!platformSupportsBitnessSet) { // Bitness is supported on Windows 2003 Server SP1 or // greater. // if (Environment.OSVersion.Version.Major > 5) platformSupportsBitness = true; else if (Environment.OSVersion.Version.Major == 5) { if (Environment.OSVersion.Version.Minor > 2) platformSupportsBitness = true; else if (Environment.OSVersion.Version.Minor == 2) { if (!string.IsNullOrEmpty(Environment.OSVersion.ServicePack)) platformSupportsBitness = true; } } platformSupportsBitnessSet = true; } return platformSupportsBitness; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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