我在将控件设置为安全时遇到问题。 我发现这个 thread 解释了如何完成它。 我按照说明做了:
class myctrl: public COleControl, public IObjectSafetyImpl<myctrl,INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA>
{
然后,我添加了以下内容:
BEGIN_COM_MAP(myctrl)
COM_INTERFACE_ENTRY(IObjectSafety)
END_COM_MAP()
“BEGIN_COM_MAP”给我带来麻烦,我不知道为什么。 它说“锁定”和“解锁”不是 myctrl 的成员。 我找不到任何与之相关的东西以及我需要对这两个成员做什么 我也收到错误:
Error 3 error C2660: 'CCmdTarget::InternalQueryInterface' : function does not take 4 arguments
最佳答案
对于 MFC COM,您需要将一些样板代码添加到您的 COleControl
派生类中。警告 - 即将出现一些大的复制/粘贴,所以请原谅拼写错误!
首先,在您的控件的头文件中,添加以下内容
DECLARE_INTERFACE_MAP()
BEGIN_INTERFACE_PART(ObjectSafety, IObjectSafety)
STDMETHOD(GetInterfaceSafetyOptions)(REFIID riid, DWORD __RPC_FAR *pdwSupportedOptions, DWORD __RPC_FAR *pdwEnabledOptions);
STDMETHOD(SetInterfaceSafetyOptions)(REFIID riid, DWORD dwOptionSetMask, DWORD dwEnabledOptions);
END_INTERFACE_PART(ObjectSafety)
然后,在实现文件中,添加这个
BEGIN_INTERFACE_MAP(myctrl, COleControl)
INTERFACE_PART(myctrl, IID_IObjectSafety, ObjectSafety)
END_INTERFACE_MAP()
// Implementation of IObjectSafety
STDMETHODIMP myctrl::XObjectSafety::GetInterfaceSafetyOptions(
REFIID riid,
DWORD __RPC_FAR *pdwSupportedOptions,
DWORD __RPC_FAR *pdwEnabledOptions)
{
METHOD_PROLOGUE_EX(myctrl, ObjectSafety)
if (!pdwSupportedOptions || !pdwEnabledOptions)
{
return E_POINTER;
}
*pdwSupportedOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER | INTERFACESAFE_FOR_UNTRUSTED_DATA;
*pdwEnabledOptions = 0;
if (NULL == pThis->GetInterface(&riid))
{
TRACE("Requested interface is not supported./n");
return E_NOINTERFACE;
}
// What interface is being checked out anyhow?
OLECHAR szGUID[39];
int i = StringFromGUID2(riid, szGUID, 39);
if (riid == IID_IDispatch)
{
// Client wants to know if object is safe for scripting
*pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_CALLER;
return S_OK;
}
else if (riid == IID_IPersistPropertyBag
|| riid == IID_IPersistStreamInit
|| riid == IID_IPersistStorage
|| riid == IID_IPersistMemory)
{
// Those are the persistence interfaces COleControl derived controls support
// as indicated in AFXCTL.H
// Client wants to know if object is safe for initializing from persistent data
*pdwEnabledOptions = INTERFACESAFE_FOR_UNTRUSTED_DATA;
return S_OK;
}
else
{
// Find out what interface this is, and decide what options to enable
TRACE("We didn't account for the safety of this interface, and it's one we support.../n");
return E_NOINTERFACE;
}
}
STDMETHODIMP myctrl::XObjectSafety::SetInterfaceSafetyOptions(
REFIID riid,
DWORD dwOptionSetMask,
DWORD dwEnabledOptions)
{
METHOD_PROLOGUE_EX(myctrl, ObjectSafety)
OLECHAR szGUID[39];
// What is this interface anyway?
// We can do a quick lookup in the registry under HKEY_CLASSES_ROOT/Interface
int i = StringFromGUID2(riid, szGUID, 39);
if (0 == dwOptionSetMask && 0 == dwEnabledOptions)
{
// the control certainly supports NO requests through the specified interface
// so it's safe to return S_OK even if the interface isn't supported.
return S_OK;
}
// Do we support the specified interface?
if (NULL == pThis->GetInterface(&riid))
{
TRACE1("%s is not support./n", szGUID);
return E_FAIL;
}
if (riid == IID_IDispatch)
{
TRACE("Client asking if it's safe to call through IDispatch./n");
TRACE("In other words, is the control safe for scripting?/n");
if (INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_CALLER == dwEnabledOptions)
{
return S_OK;
}
else
{
return E_FAIL;
}
}
else if (riid == IID_IPersistPropertyBag
|| riid == IID_IPersistStreamInit
|| riid == IID_IPersistStorage
|| riid == IID_IPersistMemory)
{
TRACE("Client asking if it's safe to call through IPersist*./n");
TRACE("In other words, is the control safe for initializing from persistent data?/n");
if (INTERFACESAFE_FOR_UNTRUSTED_DATA == dwOptionSetMask && INTERFACESAFE_FOR_UNTRUSTED_DATA == dwEnabledOptions)
{
return NOERROR;
}
else
{
return E_FAIL;
}
}
else
{
TRACE1("We didn't account for the safety of %s, and it's one we support.../n", szGUID);
return E_FAIL;
}
}
STDMETHODIMP_(ULONG) myctrl::XObjectSafety::AddRef()
{
METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
return (ULONG)pThis->ExternalAddRef();
}
STDMETHODIMP_(ULONG) myctrl::XObjectSafety::Release()
{
METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
return (ULONG)pThis->ExternalRelease();
}
STDMETHODIMP myctrl::XObjectSafety::QueryInterface(
REFIID iid, LPVOID* ppvObj)
{
METHOD_PROLOGUE_EX_(myctrl, ObjectSafety)
return (HRESULT)pThis->ExternalQueryInterface(&iid, ppvObj);
}
关于javascript - 在 C++ 中继承 IObjectSafetyImpl 以实现安全的 javascript activex 控件,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16911847/