Update import

Import/GacUI.UnitTest.cpp

@@ -2048,6 +2048,40 @@ void GacUIUnitTest_LogDiffs(const WString& appName, UnitTestRemoteProtocol& unit
 	GacUIUnitTest_WriteSnapshotFileIfChanged(snapshotFile, textLog);
 }
 
+namespace vl::presentation::remoteprotocol::channeling
+{
+	class UnitTestChannelServer
+		: public Object
+		, public virtual inter_process::INetworkProtocolServer
+	{
+	private:
+		bool stopped = true;
+
+	public:
+		inter_process::WaitForClientResult OnClientConnected(inter_process::INetworkProtocolConnection* connection) override
+		{
+			return inter_process::WaitForClientResult::Reject;
+		}
+
+		void Start() override
+		{
+			stopped = false;
+		}
+
+		void Stop() override
+		{
+			stopped = true;
+		}
+
+		bool IsStopped() override
+		{
+			return stopped;
+		}
+	};
+
+	using GuiRemoteProtocolChannelServer = GuiRemoteProtocolNetworkChannelServer<UnitTestChannelServer>;
+}
+
 void GacUIUnitTest_Start(const WString& appName, Nullable<UnitTestScreenConfig> config)
 {
 	UnitTestScreenConfig globalConfig;

Import/GacUI.h

@@ -22848,40 +22848,9 @@ ChannelPackageSemantic
 	extern void						JsonChannelUnpack(Ptr<glr::json::JsonObject> package, ChannelPackageInfo& info, Ptr<glr::json::JsonNode>& arguments);
 	extern void						JsonChannelUnpack(Ptr<glr::json::JsonNode> package, ChannelPackageInfo& info, Ptr<glr::json::JsonNode>& arguments);
 
-	class GuiRemoteProtocolLocalChannelServerBase
-		: public Object
-		, public virtual inter_process::INetworkProtocolServer
-	{
-	private:
-		bool stopped = true;
-
-	public:
-		inter_process::WaitForClientResult OnClientConnected(inter_process::INetworkProtocolConnection* connection) override
-		{
-			return inter_process::WaitForClientResult::Reject;
-		}
-
-		void Start() override
-		{
-			stopped = false;
-		}
-
-		void Stop() override
-		{
-			stopped = true;
-		}
-
-		bool IsStopped() override
-		{
-			return stopped;
-		}
-	};
-
 	template<typename TServerBase>
 	using GuiRemoteProtocolNetworkChannelServer = inter_process::NetworkProtocolChannelServer<JsonPackage, glr::json::JsonNodeListSerializer, TServerBase>;
 
-	using GuiRemoteProtocolChannelServer = GuiRemoteProtocolNetworkChannelServer<GuiRemoteProtocolLocalChannelServerBase>;
-
 	class GuiRemoteProtocolChannelClient
 		: public inter_process::NetworkProtocolChannelClient<JsonPackage, glr::json::JsonNodeListSerializer>
 	{

Import/VlppOS.Windows.cpp

@@ -1992,8 +1992,9 @@ HttpClient::~HttpClient()
 
 void HttpClient::InstallCallback(INetworkProtocolCallback* _callback)
 {
+	CHECK_ERROR(!callback || !_callback, L"HttpClient::InstallCallback only accepts one callback at a time.");
 	callback = _callback;
-	CHECK_ERROR(callback, L"HttpClient::InstallCallback needs a valid INetworkProtocolCallback.");
+	if (!callback) return;
 	callback->OnInstalled(this);
 }
 
@@ -2921,13 +2922,17 @@ WString HttpServerConnection::SubmitResponse(PHTTP_REQUEST pRequest)
 
 void HttpServerConnection::InstallCallback(INetworkProtocolCallback* _callback)
 {
-	CHECK_ERROR(_callback, L"HttpServerConnection::InstallCallback needs a valid INetworkProtocolCallback.");
+	CHECK_ERROR(!callback || !_callback, L"HttpServerConnection::InstallCallback only accepts one callback at a time.");
-	_callback->OnInstalled(this);
+	if (_callback)
+	{
+		_callback->OnInstalled(this);
+	}
 
 	List<WString> strings;
 	SPIN_LOCK(lockQueuedStrings)
 	{
 		callback = _callback;
+		if (!callback) return;
 		strings = std::move(queuedStrings);
 	}
 	for (const auto& str : strings)
@@ -4070,8 +4075,9 @@ NamedPipeConnection::~NamedPipeConnection()
 
 void NamedPipeConnection::InstallCallback(INetworkProtocolCallback* _callback)
 {
+	CHECK_ERROR(!callback || !_callback, L"NamedPipeConnection::InstallCallback only accepts one callback at a time.");
 	callback = _callback;
-	CHECK_ERROR(callback, L"NamedPipeConnection::InstallCallback needs a valid INetworkProtocolCallback.");
+	if (!callback) return;
 	callback->OnInstalled(this);
 }
 

Import/VlppOS.h

@@ -1663,10 +1663,10 @@ INetworkProtocolServer
 	public:
 		/// <summary>
 		/// Install the callback to the connection.
-		/// If multiple text messages are received before installing the callback, all text messages will be pushed to the callback right away.
+		/// Uninstall by passing nullptr.
-		/// This function can only be called once to install a callback, and no uninstallation is supported.
+		/// Only one callback can be installed at a time.
 		/// </summary>
-		/// <param name="callback">The callback object. It should not be null.</param>
+		/// <param name="callback">The callback object.</param>
 		virtual void							InstallCallback(INetworkProtocolCallback* callback) = 0;
 
 		/// <summary>
@@ -2476,6 +2476,7 @@ NetworkProtocolChannelClient
 			{
 				npClient->GetConnection()->Stop();
 			}
+			npClient->GetConnection()->InstallCallback(nullptr);
 		}
 
 		void WaitForServer() override