void CNetDDESvrApp::OnAdvise(CDDELink* pLink, const CDDEData* pData)
{
ASSERT(pData != NULL);
// Ignore Advise, if during an Advise Start.
if (pLink == NULL)
return;
CDDEConv* pConv = pLink->Conversation();
CBuffer oData = pData->GetBuffer();
// Find the links' value in the cache.
CLinkValue* pValue = m_oLinkCache.Find(pConv, pLink);
// Discard duplicate updates.
if ((App.m_bDiscardDups) && (pValue != NULL)
&& (pValue->m_oLastValue == oData))
{
if (App.m_bTraceUpdates)
App.Trace(TXT("DDE_ADVISE: %s %s (ignored)"), pConv->Service(), pLink->Item());
return;
}
// Create a cache entry, if a new link.
if (pValue == NULL)
pValue = m_oLinkCache.Create(pConv, pLink);
ASSERT(pValue != NULL);
// Update links' cached value.
pValue->m_oLastValue = oData;
pValue->m_tLastUpdate = CDateTime::Current();
// Create advise packet.
HCONV hConv = pConv->Handle();
CBuffer oBuffer;
CMemStream oStream(oBuffer);
oStream.Create();
oStream.Write(&hConv, sizeof(hConv));
oStream << pLink->Item();
oStream << (uint32) pLink->Format();
oStream << oData;
oStream << true;
oStream.Close();
CNetDDEPacket oPacket(CNetDDEPacket::DDE_ADVISE, oBuffer);
// Notify all NetDDEClients...
for (size_t i = 0; i < m_aoConnections.Size(); ++i)
{
CNetDDESvrSocket* pConnection = m_aoConnections[i];
// Ignore, if connection severed.
if (!pConnection->IsOpen())
continue;
// Connection references link?
if (pConnection->IsLinkUsed(pLink))
{
try
{
if (App.m_bTraceUpdates)
{
uint nFormat = pLink->Format();
CString strData;
if (nFormat == CF_TEXT)
strData = oData.ToString(ANSI_TEXT);
else if (nFormat == CF_UNICODETEXT)
strData = oData.ToString(UNICODE_TEXT);
else
strData = CClipboard::FormatName(nFormat);
App.Trace(TXT("DDE_ADVISE: %s %s [%s]"), pConv->Service(), pLink->Item(), strData);
}
// Send advise message.
pConnection->SendPacket(oPacket);
// Update stats.
++m_nPktsSent;
}
catch (CSocketException& e)
{
App.Trace(TXT("SOCKET_ERROR: %s"), e.twhat());
}
}
}
}
void CNetDDESvrApp::OnDDEPoke(CNetDDESvrSocket& oConnection, CNetDDEPacket& oReqPacket)
{
ASSERT(oReqPacket.DataType() == CNetDDEPacket::DDE_POKE);
bool bResult = false;
HCONV hConv;
uint32 nConvID;
CString strItem;
uint32 nFormat;
CBuffer oData;
// Decode message.
CMemStream oStream(oReqPacket.Buffer());
oStream.Open();
oStream.Seek(sizeof(CNetDDEPacket::Header));
oStream.Read(&hConv, sizeof(hConv));
oStream >> nConvID;
oStream >> strItem;
oStream >> nFormat;
oStream >> oData;
oStream.Close();
if (App.m_bTraceRequests)
{
CString strData;
if (nFormat == CF_TEXT)
strData = oData.ToString(ANSI_TEXT);
else if (nFormat == CF_UNICODETEXT)
strData = oData.ToString(UNICODE_TEXT);
else
strData = CClipboard::FormatName(nFormat);
App.Trace(TXT("DDE_POKE: %s %s [%s]"), strItem, CClipboard::FormatName(nFormat), strData);
}
try
{
// Locate the conversation.
CDDECltConv* pConv = m_pDDEClient->FindConversation(hConv);
if (pConv != NULL)
{
// Call DDE to do the poke.
pConv->Poke(strItem, nFormat, oData.Buffer(), oData.Size());
bResult = true;
}
}
catch (CDDEException& e)
{
App.Trace(TXT("DDE_ERROR: %s"), e.twhat());
}
// Create response message.
CBuffer oRspBuffer;
CMemStream oRspStream(oRspBuffer);
oRspStream.Create();
oRspStream << bResult;
oRspStream.Close();
// Send response message.
CNetDDEPacket oRspPacket(CNetDDEPacket::DDE_POKE, oReqPacket.PacketID(), oRspBuffer);
oConnection.SendPacket(oRspPacket);
// Update stats.
++m_nPktsSent;
}
