Issue 1264 - Generate custom response for subdocument on subdomain request

src/plugin/SinkPolicy.inl

 #ifndef PASSTHROUGHAPP_SINKPOLICY_INL
 #define PASSTHROUGHAPP_SINKPOLICY_INL
 
 #if _MSC_VER > 1000
         #pragma once
 #endif // _MSC_VER > 1000
 
 #ifndef PASSTHROUGHAPP_SINKPOLICY_H
         #error SinkPolicy.inl requires SinkPolicy.h to be included first
 #endif
@@ skipping 344 matching lines @@
 // ===== CustomSinkStartPolicy =====
 
 template <class Protocol, class Sink>
 inline HRESULT CustomSinkStartPolicy<Protocol, Sink>::OnStart(LPCWSTR szUrl,
         IInternetProtocolSink *pOIProtSink, IInternetBindInfo *pOIBindInfo,
         DWORD grfPI, HANDLE_PTR dwReserved,
         IInternetProtocol* pTargetProtocol) const
 {
         ATLASSERT(pTargetProtocol != 0);
 
+  bool handled = false;
         Sink* pSink = GetSink(static_cast<const Protocol*>(this));
         HRESULT hr = pSink->OnStart(szUrl, pOIProtSink, pOIBindInfo, grfPI,
-                dwReserved, pTargetProtocol);
+                dwReserved, pTargetProtocol, handled);
 
         CComPtr<IInternetProtocolSink> spSink;
         CComPtr<IInternetBindInfo> spBindInfo;
         if (SUCCEEDED(hr))
         {
                 hr = pSink->QueryInterface(IID_IInternetProtocolSink,
                         reinterpret_cast<void**>(&spSink));
                 ATLASSERT(SUCCEEDED(hr) && spSink != 0);
         }
         if (SUCCEEDED(hr))
         {
                 hr = pSink->QueryInterface(IID_IInternetBindInfo,
                         reinterpret_cast<void**>(&spBindInfo));
                 ATLASSERT(SUCCEEDED(hr) && spBindInfo != 0);
         }
-        if (SUCCEEDED(hr))
+        if (SUCCEEDED(hr) && !handled)
         {
                 hr = pTargetProtocol->Start(szUrl, spSink, spBindInfo, grfPI,
                         dwReserved);
         }
         return hr;
 }
 
 
 template <class Protocol, class Sink>
 inline Sink* CustomSinkStartPolicy<Protocol, Sink>::GetSink(
@@ skipping 11 matching lines @@
 template <class Protocol, class Sink>
 inline Protocol* CustomSinkStartPolicy<Protocol, Sink>::GetProtocol(
         const Sink* pSink)
 {
         return Protocol::ComObjectClass::GetProtocol(pSink);
 }
 
 } // end namespace PassthroughAPP
 
 #endif // PASSTHROUGHAPP_SINKPOLICY_INL