Code:
/ Dotnetfx_Win7_3.5.1 / Dotnetfx_Win7_3.5.1 / 3.5.1 / DEVDIV / depot / DevDiv / releases / Orcas / NetFXw7 / ndp / fx / src / DataEntity / System / Data / Metadata / AspProxy.cs / 1 / AspProxy.cs
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....]
//---------------------------------------------------------------------
using System.Reflection;
using System.Diagnostics;
using System.Data.Entity;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
namespace System.Data.Metadata.Edm
{
internal class AspProxy
{
private const string BUILD_MANAGER_TYPE_NAME = @"System.Web.Compilation.BuildManager";
private Assembly _webAssembly;
private bool _triedLoadingWebAssembly = false;
///
/// Determine whether we are inside an ASP.NET application.
///
/// The System.Web assembly
/// true if we are running inside an ASP.NET application
internal bool IsAspNetEnvironment()
{
if (!TryInitializeWebAssembly())
{
return false;
}
try
{
string result = PrivateMapWebPath(EdmConstants.WebHomeSymbol);
return result != null;
}
catch (Exception e)
{
if (EntityUtil.IsCatchableExceptionType(e))
{
return false;
}
throw;
}
}
private bool TryInitializeWebAssembly()
{
// We cannot introduce a hard dependency on the System.Web assembly, so we load
// it via reflection.
//
if (_webAssembly != null)
{
return true;
}
else if (_triedLoadingWebAssembly)
{
return false;
}
Debug.Assert(_triedLoadingWebAssembly == false);
Debug.Assert(_webAssembly == null);
_triedLoadingWebAssembly = true;
try
{
_webAssembly = Assembly.Load(AssemblyRef.SystemWeb);
return _webAssembly != null;
}
catch (Exception e)
{
if (!EntityUtil.IsCatchableExceptionType(e))
{
throw; // StackOverflow, OutOfMemory, ...
}
// It is possible that we are operating in an environment where
// System.Web is simply not available (for instance, inside SQL
// Server). Instead of throwing or rethrowing, we simply fail
// gracefully
}
return false;
}
void InitializeWebAssembly()
{
if (!TryInitializeWebAssembly())
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext);
}
}
///
/// This method accepts a string parameter that represents a path in a Web (specifically,
/// an ASP.NET) application -- one that starts with a '~' -- and resolves it to a
/// canonical file path.
///
///
/// The implementation assumes that you cannot have file names that begin with the '~'
/// character. (This is a pretty reasonable assumption.) Additionally, the method does not
/// test for the existence of a directory or file resource after resolving the path.
///
internal string MapWebPath(string path)
{
Debug.Assert(path != null, "path == null");
path = PrivateMapWebPath(path);
if (path == null)
{
string errMsg = Strings.InvalidUseOfWebPath(EdmConstants.WebHomeSymbol);
throw EntityUtil.InvalidOperation(errMsg);
}
return path;
}
private string PrivateMapWebPath(string path)
{
Debug.Assert(!string.IsNullOrEmpty(path));
Debug.Assert(path.StartsWith(EdmConstants.WebHomeSymbol, StringComparison.Ordinal));
InitializeWebAssembly();
// Each managed application domain contains a static instance of the HostingEnvironment class, which
// provides access to application-management functions and application services. We'll try to invoke
// the static method MapPath() on that object.
//
try
{
Type hostingEnvType = _webAssembly.GetType("System.Web.Hosting.HostingEnvironment", true);
MethodInfo miMapPath = hostingEnvType.GetMethod("MapPath");
Debug.Assert(miMapPath != null, "Unpexpected missing member in type System.Web.Hosting.HostingEnvironment");
// Note:
// 1. If path is null, then the MapPath() method returns the full physical path to the directory
// containing the current application.
// 2. Any attempt to navigate out of the application directory (using "../..") will generate
// a (wrapped) System.Web.HttpException under ASP.NET (which we catch and re-throw).
//
return (string)miMapPath.Invoke(null, new object[] { path });
}
catch (TargetException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (ArgumentException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetInvocationException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetParameterCountException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MethodAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MemberAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TypeLoadException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
}
internal bool HasBuildManagerType()
{
Type buildManager;
return TryGetBuildManagerType(out buildManager);
}
private bool TryGetBuildManagerType(out Type buildManager)
{
InitializeWebAssembly();
buildManager = _webAssembly.GetType(BUILD_MANAGER_TYPE_NAME, false);
return buildManager != null;
}
internal IEnumerable GetBuildManagerReferencedAssemblies()
{
// We are interested in invoking the following method on the class
// System.Web.Compilation.BuildManager, which is available only in Orcas:
//
// public static ICollection GetReferencedAssemblies();
//
Type buildManager;
if (!TryGetBuildManagerType(out buildManager))
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToFindReflectedType(BUILD_MANAGER_TYPE_NAME, AssemblyRef.SystemWeb));
}
MethodInfo getRefAssembliesMethod = buildManager.GetMethod(
@"GetReferencedAssemblies",
BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.Public
);
if (getRefAssembliesMethod == null)
{
// eat this problem
return new List();
}
ICollection referencedAssemblies = null;
try
{
referencedAssemblies = (ICollection)getRefAssembliesMethod.Invoke(null, null);
if (referencedAssemblies == null)
{
return new List();
}
return referencedAssemblies.Cast();
}
catch (TargetException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetInvocationException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MethodAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
}
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
//----------------------------------------------------------------------
//
// Copyright (c) Microsoft Corporation. All rights reserved.
//
//
// @owner [....]
//---------------------------------------------------------------------
using System.Reflection;
using System.Diagnostics;
using System.Data.Entity;
using System.Collections.Generic;
using System.Collections;
using System.Linq;
namespace System.Data.Metadata.Edm
{
internal class AspProxy
{
private const string BUILD_MANAGER_TYPE_NAME = @"System.Web.Compilation.BuildManager";
private Assembly _webAssembly;
private bool _triedLoadingWebAssembly = false;
///
/// Determine whether we are inside an ASP.NET application.
///
/// The System.Web assembly
/// true if we are running inside an ASP.NET application
internal bool IsAspNetEnvironment()
{
if (!TryInitializeWebAssembly())
{
return false;
}
try
{
string result = PrivateMapWebPath(EdmConstants.WebHomeSymbol);
return result != null;
}
catch (Exception e)
{
if (EntityUtil.IsCatchableExceptionType(e))
{
return false;
}
throw;
}
}
private bool TryInitializeWebAssembly()
{
// We cannot introduce a hard dependency on the System.Web assembly, so we load
// it via reflection.
//
if (_webAssembly != null)
{
return true;
}
else if (_triedLoadingWebAssembly)
{
return false;
}
Debug.Assert(_triedLoadingWebAssembly == false);
Debug.Assert(_webAssembly == null);
_triedLoadingWebAssembly = true;
try
{
_webAssembly = Assembly.Load(AssemblyRef.SystemWeb);
return _webAssembly != null;
}
catch (Exception e)
{
if (!EntityUtil.IsCatchableExceptionType(e))
{
throw; // StackOverflow, OutOfMemory, ...
}
// It is possible that we are operating in an environment where
// System.Web is simply not available (for instance, inside SQL
// Server). Instead of throwing or rethrowing, we simply fail
// gracefully
}
return false;
}
void InitializeWebAssembly()
{
if (!TryInitializeWebAssembly())
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext);
}
}
///
/// This method accepts a string parameter that represents a path in a Web (specifically,
/// an ASP.NET) application -- one that starts with a '~' -- and resolves it to a
/// canonical file path.
///
///
/// The implementation assumes that you cannot have file names that begin with the '~'
/// character. (This is a pretty reasonable assumption.) Additionally, the method does not
/// test for the existence of a directory or file resource after resolving the path.
///
internal string MapWebPath(string path)
{
Debug.Assert(path != null, "path == null");
path = PrivateMapWebPath(path);
if (path == null)
{
string errMsg = Strings.InvalidUseOfWebPath(EdmConstants.WebHomeSymbol);
throw EntityUtil.InvalidOperation(errMsg);
}
return path;
}
private string PrivateMapWebPath(string path)
{
Debug.Assert(!string.IsNullOrEmpty(path));
Debug.Assert(path.StartsWith(EdmConstants.WebHomeSymbol, StringComparison.Ordinal));
InitializeWebAssembly();
// Each managed application domain contains a static instance of the HostingEnvironment class, which
// provides access to application-management functions and application services. We'll try to invoke
// the static method MapPath() on that object.
//
try
{
Type hostingEnvType = _webAssembly.GetType("System.Web.Hosting.HostingEnvironment", true);
MethodInfo miMapPath = hostingEnvType.GetMethod("MapPath");
Debug.Assert(miMapPath != null, "Unpexpected missing member in type System.Web.Hosting.HostingEnvironment");
// Note:
// 1. If path is null, then the MapPath() method returns the full physical path to the directory
// containing the current application.
// 2. Any attempt to navigate out of the application directory (using "../..") will generate
// a (wrapped) System.Web.HttpException under ASP.NET (which we catch and re-throw).
//
return (string)miMapPath.Invoke(null, new object[] { path });
}
catch (TargetException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (ArgumentException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetInvocationException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetParameterCountException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MethodAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MemberAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TypeLoadException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
}
internal bool HasBuildManagerType()
{
Type buildManager;
return TryGetBuildManagerType(out buildManager);
}
private bool TryGetBuildManagerType(out Type buildManager)
{
InitializeWebAssembly();
buildManager = _webAssembly.GetType(BUILD_MANAGER_TYPE_NAME, false);
return buildManager != null;
}
internal IEnumerable GetBuildManagerReferencedAssemblies()
{
// We are interested in invoking the following method on the class
// System.Web.Compilation.BuildManager, which is available only in Orcas:
//
// public static ICollection GetReferencedAssemblies();
//
Type buildManager;
if (!TryGetBuildManagerType(out buildManager))
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToFindReflectedType(BUILD_MANAGER_TYPE_NAME, AssemblyRef.SystemWeb));
}
MethodInfo getRefAssembliesMethod = buildManager.GetMethod(
@"GetReferencedAssemblies",
BindingFlags.InvokeMethod | BindingFlags.Static | BindingFlags.Public
);
if (getRefAssembliesMethod == null)
{
// eat this problem
return new List();
}
ICollection referencedAssemblies = null;
try
{
referencedAssemblies = (ICollection)getRefAssembliesMethod.Invoke(null, null);
if (referencedAssemblies == null)
{
return new List();
}
return referencedAssemblies.Cast();
}
catch (TargetException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (TargetInvocationException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
catch (MethodAccessException e)
{
throw EntityUtil.InvalidOperation(System.Data.Entity.Strings.UnableToDetermineApplicationContext, e);
}
}
}
}
// 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
- PropagatorResult.cs
- ActivityBuilderHelper.cs
- ValidationService.cs
- DataColumnMapping.cs
- TypeListConverter.cs
- FloaterParaClient.cs
- SHA384.cs
- SourceChangedEventArgs.cs
- ClientScriptManager.cs
- PassportAuthenticationModule.cs
- HttpListenerResponse.cs
- MetadataPropertyvalue.cs
- ExtentJoinTreeNode.cs
- VisualStyleRenderer.cs
- PostBackOptions.cs
- PtsHelper.cs
- AppSettingsExpressionBuilder.cs
- EntityDataSourceChangingEventArgs.cs
- DesignerLoader.cs
- FileUpload.cs
- ConfigurationLocationCollection.cs
- SecurityResources.cs
- AutomationPropertyInfo.cs
- SignatureDescription.cs
- InfiniteTimeSpanConverter.cs
- GridViewCellAutomationPeer.cs
- TypeBuilderInstantiation.cs
- DescriptionAttribute.cs
- TypeUtils.cs
- DataSourceXmlSerializer.cs
- DataGridViewTextBoxEditingControl.cs
- Transform3DGroup.cs
- RightsManagementInformation.cs
- XmlAttributeCache.cs
- CapabilitiesState.cs
- OverrideMode.cs
- XsltContext.cs
- DataListItemCollection.cs
- MessageBox.cs
- ServiceMemoryGates.cs
- HtmlDocument.cs
- ProfilePropertyMetadata.cs
- RequestValidator.cs
- CellTreeNode.cs
- PointAnimationUsingPath.cs
- WebPartConnectionsDisconnectVerb.cs
- Binding.cs
- HttpDictionary.cs
- ConnectionManagementSection.cs
- activationcontext.cs
- SqlLiftIndependentRowExpressions.cs
- PluralizationServiceUtil.cs
- SocketElement.cs
- TreeNodeCollection.cs
- TextBreakpoint.cs
- MsmqEncryptionAlgorithm.cs
- LabelLiteral.cs
- StatusBarDrawItemEvent.cs
- WebPartsPersonalization.cs
- CompletionProxy.cs
- UnsafeNativeMethods.cs
- HtmlLink.cs
- OracleRowUpdatingEventArgs.cs
- ModelUtilities.cs
- DataPager.cs
- ScrollPattern.cs
- WindowsUpDown.cs
- XmlSchemaInclude.cs
- GenericAuthenticationEventArgs.cs
- ColorTypeConverter.cs
- VariableQuery.cs
- SessionStateModule.cs
- GreaterThan.cs
- ImageSourceValueSerializer.cs
- SystemException.cs
- Stream.cs
- RenderData.cs
- x509utils.cs
- AbstractDataSvcMapFileLoader.cs
- ListBox.cs
- DataGridColumnDropSeparator.cs
- ServiceDescription.cs
- ThousandthOfEmRealDoubles.cs
- DateTimeFormat.cs
- ValueProviderWrapper.cs
- KoreanCalendar.cs
- XNodeNavigator.cs
- ProxyElement.cs
- ResourceDescriptionAttribute.cs
- OracleInternalConnection.cs
- AsyncStreamReader.cs
- DecoratedNameAttribute.cs
- MemberInfoSerializationHolder.cs
- ZipIOExtraFieldElement.cs
- Activity.cs
- SoapElementAttribute.cs
- ElementMarkupObject.cs
- DataGridViewSelectedCellsAccessibleObject.cs
- RadioButton.cs
- AsymmetricKeyExchangeDeformatter.cs