异步可插入协议 [英] Asynchronous Pluggable Protocols
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问题描述
使用此作为参考，我尝试创建一个异步可插入协议，只是暂时可用我的应用程序（而不是全系统注册）。我使用 CoInternetGetSession ，然后调用 RegisterNameSpace 来做。但是，当我调用 RegisterNameSpace 时，我得到一个AccessViolation异常：尝试读或写受保护的内存。 / p>
有什么想法吗？
我的代码看起来像这样：
[ComImport]
[InterfaceType（ComInterfaceType.InterfaceIsIUnknown）]
[Guid（00000001-0000-0000-C000-000000000046）]
[ComVisible（true）]
public interface IClassFactory
{
void CreateInstance（IntPtr pUnkOuter，ref Guid riid，out IntPtr ppvObject）;
void LockServer（bool fLock）;
}
/ *自定义类作为创建协议实例的类工厂* /
[Guid（0b9c4422-2b6e-4c2d-91b0-9016053ab1b1 ）]
[ComVisible（true），ClassInterface（ClassInterfaceType.AutoDispatch）]
public class PluggableProtocolFactory：IClassFactory
{
public Type AppType;
public PluggableProtocolFactory（Type t）
{
this.AppType = t;
}
public void CreateInstance（IntPtr pUnkOuter，ref Guid riid，out IntPtr ppvObject）
{
riid = ProtocolSupport.GetGuid（this.AppType）;
IInternetProtocol p = Activator.CreateInstance（this.AppType）as IInternetProtocol;
ppvObject = Marshal.GetComInterfaceForObject（p，typeof（IInternetProtocol））;
}
public void LockServer（bool fLock）
{
var b = fLock;
}
}
[ComVisible（true）]
[ComImport]
[InterfaceType（ComInterfaceType.InterfaceIsIDispatch）]
[Guid（79eac9e7-baf9-11ce-8c82-00aa004ba90b）]
public interface IInternetSession
{
void CreateBinding（）; // Not Implemented
void GetCache（）; // Not Implemented
void GetSessionOption（）; //未实现
void RegisterMimeFilter（[MarshalAs（UnmanagedType.Interface）] IClassFactory pCF，ref Guid rclsid，[MarshalAs（UnmanagedType.LPWStr）] string pwzType）;
void RegisterNameSpace（[MarshalAs（UnmanagedType.Interface）] IClassFactory pCF，ref Guid rclsid，[MarshalAs（UnmanagedType.LPWStr）] string pwzProtocol，
UInt32 cPatterns，[MarshalAs（UnmanagedType.LPArray，ArraySubType = UnmanagedType .LPWStr）] string [] ppwzPatterns，UInt32 dwReserved）;
void SetCache（）; // Not Implemented
void SetSessionOption（）; // Not Implemented
void UnregisterMimeFilter（IClassFactory pCF，[MarshalAs（UnmanagedType.LPWStr）] string pwzType）;
void UnregisterNameSpace（IClassFactory pCF，[MarshalAs（UnmanagedType.LPWStr）] string pwzProtocol）;
}
[ComVisible（false）] public interface IComRegister
{
void Register（Type t）;
void注销（类型t）;
}
[ComVisible（false），AttributeUsage（AttributeTargets.Class，AllowMultiple = true）]
public class AsyncProtocolAttribute：Attribute，IComRegister
{
public string Name;
public string描述;
[DllImport（urlmon.dll，PreserveSig = false）]
public static extern int CoInternetGetSession（UInt32 dwSessionMode / * = 0 * /，ref IInternetSession ppIInternetSession，UInt32 dwReserved / * = 0 * /）;
public void注册（类型t）
{
IInternetSession session = null;
CoInternetGetSession（0，ref session，0）;
Guid g = new Guid（79EAC9E4-BAF9-11CE-8C82-00AA004BA90B）;
session.RegisterNameSpace（new PluggableProtocolFactory（t），ref g，this.Name，0，null，0）;
}
CreateInstance 方法在PluggableProtocolFactory从来没有被调用。 （ RegisterNameSpace 方法中的一个断点）。
作为管理员和普通用户。
$ p解决方案
确定，确定：IInternetSession接口的声明错误：
这是一个更好的我从 monoblog ：
[ComVisible（true），Guid（79eac9e7-baf9-11ce-8c82-00aa004ba90b） ，InterfaceTypeAttribute（ComInterfaceType.InterfaceIsIUnknown）]
public interface IInternetSession
{
[PreserveSig]
int RegisterNameSpace（
[In] IClassFactory classFactory，
[In ] ref Guid rclsid，
[In，MarshalAs（UnmanagedType.LPWStr）] string pwzProtocol，
[In]
int cPatterns，
[In，MarshalAs
string ppwzPatterns，
[In] int dwReserved）;
[PreserveSig]
int UnregisterNameSpace（
[In] IClassFactory classFactory，
[In，MarshalAs（UnmanagedType.LPWStr）] string pszProtocol）;
int Bogus1（）;
int Bogus2（）;
int Bogus3（）;
int Bogus4（）;
int Bogus5（）
}
Using this as reference, I'm trying to create an asynchronous pluggable protocol that is only temporarily available to my app (and not registered systemwide). I'm using CoInternetGetSession and then calling RegisterNameSpace to do it. However, when I make the call to RegisterNameSpace I get an AccessViolation exception: Attempting to read or write protected memory.
Any idea what's going on?
My code looks like this:
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
[Guid("00000001-0000-0000-C000-000000000046")]
[ComVisible(true)]
public interface IClassFactory
{
void CreateInstance(IntPtr pUnkOuter, ref Guid riid, out IntPtr ppvObject);
void LockServer(bool fLock);
}
/* Custom class to act as a class factory that create's an instance of the protocol */
[Guid("0b9c4422-2b6e-4c2d-91b0-9016053ab1b1")]
[ComVisible(true),ClassInterface(ClassInterfaceType.AutoDispatch)]
public class PluggableProtocolFactory : IClassFactory
{
public Type AppType;
public PluggableProtocolFactory(Type t)
{
this.AppType = t;
}
public void CreateInstance(IntPtr pUnkOuter, ref Guid riid, out IntPtr ppvObject)
{
riid = ProtocolSupport.GetGuid(this.AppType);
IInternetProtocol p = Activator.CreateInstance(this.AppType) as IInternetProtocol;
ppvObject = Marshal.GetComInterfaceForObject(p, typeof(IInternetProtocol));
}
public void LockServer(bool fLock)
{
var b = fLock;
}
}
[ComVisible(true)]
[ComImport]
[InterfaceType(ComInterfaceType.InterfaceIsIDispatch)]
[Guid("79eac9e7-baf9-11ce-8c82-00aa004ba90b")]
public interface IInternetSession
{
void CreateBinding(); // Not Implemented
void GetCache(); // Not Implemented
void GetSessionOption(); // Not Implemented
void RegisterMimeFilter([MarshalAs(UnmanagedType.Interface)] IClassFactory pCF, ref Guid rclsid, [MarshalAs(UnmanagedType.LPWStr)] string pwzType);
void RegisterNameSpace([MarshalAs(UnmanagedType.Interface)] IClassFactory pCF, ref Guid rclsid, [MarshalAs(UnmanagedType.LPWStr)] string pwzProtocol,
UInt32 cPatterns, [MarshalAs(UnmanagedType.LPArray,ArraySubType=UnmanagedType.LPWStr)] string[] ppwzPatterns, UInt32 dwReserved);
void SetCache(); // Not Implemented
void SetSessionOption(); // Not Implemented
void UnregisterMimeFilter(IClassFactory pCF, [MarshalAs(UnmanagedType.LPWStr)] string pwzType);
void UnregisterNameSpace(IClassFactory pCF, [MarshalAs(UnmanagedType.LPWStr)] string pwzProtocol);
}
[ComVisible(false)] public interface IComRegister
{
void Register(Type t);
void Unregister(Type t);
}
[ComVisible(false), AttributeUsage(AttributeTargets.Class, AllowMultiple=true) ]
public class AsyncProtocolAttribute : Attribute, IComRegister
{
public string Name;
public string Description;
[DllImport("urlmon.dll",PreserveSig=false)]
public static extern int CoInternetGetSession(UInt32 dwSessionMode /* = 0 */, ref IInternetSession ppIInternetSession, UInt32 dwReserved /* = 0 */);
public void Register(Type t)
{
IInternetSession session = null;
CoInternetGetSession(0, ref session, 0);
Guid g = new Guid("79EAC9E4-BAF9-11CE-8C82-00AA004BA90B");
session.RegisterNameSpace(new PluggableProtocolFactory(t), ref g, this.Name, 0, null, 0);
}
The CreateInstance method in PluggableProtocolFactory never gets called. (A break point there never gets hit) so something else is happening inside the RegisterNameSpace method.
I tried running both as an administrator and a normal user. Same error in both occasions.
解决方案
OK, figured it out: The declaration of the IInternetSession interface was wrong:
Here's a better one I picked up from monoblog:
[ComVisible(true), Guid("79eac9e7-baf9-11ce-8c82-00aa004ba90b"),InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown)]
public interface IInternetSession
{
[PreserveSig]
int RegisterNameSpace(
[In] IClassFactory classFactory,
[In] ref Guid rclsid,
[In, MarshalAs(UnmanagedType.LPWStr)] string pwzProtocol,
[In]
int cPatterns,
[In, MarshalAs(UnmanagedType.LPWStr)]
string ppwzPatterns,
[In] int dwReserved);
[PreserveSig]
int UnregisterNameSpace(
[In] IClassFactory classFactory,
[In, MarshalAs(UnmanagedType.LPWStr)] string pszProtocol);
int Bogus1();
int Bogus2();
int Bogus3();
int Bogus4();
int Bogus5();
}
这篇关于异步可插入协议的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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