Call AllocConsole (#1351)

src/AspNetCoreModuleV2/CommonLib/FileOutputManager.cpp

@@ -20,7 +20,8 @@ FileOutputManager::FileOutputManager(bool fEnableNativeLogging) :
     m_disposed(false),
     stdoutWrapper(nullptr),
     stderrWrapper(nullptr),
-    m_fEnableNativeRedirection(fEnableNativeLogging)
+    m_fEnableNativeRedirection(fEnableNativeLogging),
+    m_fCreatedConsole(false)
 {
     InitializeSRWLock(&m_srwLock);
 }
@@ -49,6 +50,21 @@ FileOutputManager::Start()
     STRU struPath;
     FILETIME processCreationTime;
     FILETIME dummyFileTime;
+    
+    // To make Console.* functions work, allocate a console
+    // in the current process.
+    if (!AllocConsole())
+    {
+        // ERROR_ACCESS_DENIED means there is a console already present.
+        if (GetLastError() != ERROR_ACCESS_DENIED)
+        {
+            RETURN_LAST_ERROR();
+        }
+    }
+    else
+    {
+        m_fCreatedConsole = true;
+    }
 
     // Concatenate the log file name and application path
     RETURN_IF_FAILED(FILE_UTILITY::ConvertPathToFullPath(
@@ -129,6 +145,11 @@ FileOutputManager::Stop()
 
     m_disposed = true;
 
+    if (m_fCreatedConsole)
+    {
+        RETURN_LAST_ERROR_IF(!FreeConsole());
+    }
+
     if (m_hLogFileHandle == INVALID_HANDLE_VALUE)
     {
         return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);

src/AspNetCoreModuleV2/CommonLib/FileOutputManager.h

@@ -35,6 +35,7 @@ private:
     STRA m_straFileContent;
     BOOL m_disposed;
     BOOL m_fEnableNativeRedirection;
+    BOOL m_fCreatedConsole;
     SRWLOCK m_srwLock{};
     std::unique_ptr<StdWrapper>    stdoutWrapper;
     std::unique_ptr<StdWrapper>    stderrWrapper;

src/AspNetCoreModuleV2/CommonLib/LoggingHelpers.cpp

@@ -27,13 +27,18 @@ LoggingHelpers::CreateLoggingProvider(
 
     try
     {
+        // Check if there is an existing active console window before redirecting
+        // Window == IISExpress with active console window, don't redirect to a pipe
+        // if true.
+        CONSOLE_SCREEN_BUFFER_INFO dummy;
+
         if (fIsLoggingEnabled)
         {
             auto manager = std::make_unique<FileOutputManager>(fEnableNativeLogging);
             hr = manager->Initialize(pwzStdOutFileName, pwzApplicationPath);
             outputManager = std::move(manager);
         }
-        else if (!GetConsoleWindow())
+        else if (!GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &dummy))
         {
             outputManager = std::make_unique<PipeOutputManager>(fEnableNativeLogging);
         }

src/AspNetCoreModuleV2/CommonLib/PipeOutputManager.cpp

@@ -24,7 +24,8 @@ PipeOutputManager::PipeOutputManager(bool fEnableNativeLogging) :
     m_disposed(FALSE),
     m_fEnableNativeRedirection(fEnableNativeLogging),
     stdoutWrapper(nullptr),
-    stderrWrapper(nullptr)
+    stderrWrapper(nullptr),
+    m_fCreatedConsole(false)
 {
     InitializeSRWLock(&m_srwLock);
 }
@@ -43,6 +44,21 @@ HRESULT PipeOutputManager::Start()
     HANDLE                  hStdErrReadPipe;
     HANDLE                  hStdErrWritePipe;
 
+    // To make Console.* functions work, allocate a console
+    // in the current process.
+    if (!AllocConsole())
+    {
+        // ERROR_ACCESS_DENIED means there is a console already present.
+        if (GetLastError() != ERROR_ACCESS_DENIED)
+        {
+            RETURN_LAST_ERROR();
+        }
+    }
+    else
+    {
+        m_fCreatedConsole = true;
+    }
+
     RETURN_LAST_ERROR_IF(!CreatePipe(&hStdErrReadPipe, &hStdErrWritePipe, &saAttr, 0 /*nSize*/));
 
     m_hErrReadPipe = hStdErrReadPipe;
@@ -92,6 +108,11 @@ HRESULT PipeOutputManager::Stop()
 
     m_disposed = true;
 
+    if (m_fCreatedConsole)
+    {
+        FreeConsole();
+    }
+
     // Both pipe wrappers duplicate the pipe writer handle
     // meaning we are fine to close the handle too.
     if (m_hErrWritePipe != INVALID_HANDLE_VALUE)

src/AspNetCoreModuleV2/CommonLib/PipeOutputManager.h

@@ -39,6 +39,7 @@ private:
     SRWLOCK                         m_srwLock {};
     BOOL                            m_disposed;
     BOOL                            m_fEnableNativeRedirection;
+    BOOL                            m_fCreatedConsole;
     std::unique_ptr<StdWrapper>     stdoutWrapper;
     std::unique_ptr<StdWrapper>     stderrWrapper;
 };

test/Common.FunctionalTests/Inprocess/StartupExceptionTests.cs

@@ -35,13 +35,7 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
             deploymentParameters.WebConfigBasedEnvironmentVariables["ASPNETCORE_INPROCESS_STARTUP_VALUE"] = path;
             deploymentParameters.WebConfigBasedEnvironmentVariables["ASPNETCORE_INPROCESS_RANDOM_VALUE"] = randomNumberString;
 
-            var deploymentResult = await DeployAsync(deploymentParameters);
-
-            var response = await deploymentResult.HttpClient.GetAsync(path);
-
-            Assert.Equal(HttpStatusCode.InternalServerError, response.StatusCode);
-
-            StopServer();
+            await AssertFailsToStart(path, deploymentParameters);
 
             Assert.Contains(TestSink.Writes, context => context.Message.Contains($"Random number: {randomNumberString}"));
         }
@@ -56,6 +50,25 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
             var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.StartupExceptionWebsite, publish: true);
             deploymentParameters.WebConfigBasedEnvironmentVariables["ASPNETCORE_INPROCESS_STARTUP_VALUE"] = path;
 
+            await AssertFailsToStart(path, deploymentParameters);
+
+            Assert.Contains(TestSink.Writes, context => context.Message.Contains(new string('a', 4096)));
+        }
+
+        [ConditionalFact]
+        public async Task CheckValidConsoleFunctions()
+        {
+            var path = "CheckConsoleFunctions";
+            var deploymentParameters = _fixture.GetBaseDeploymentParameters(_fixture.StartupExceptionWebsite, publish: true);
+            deploymentParameters.WebConfigBasedEnvironmentVariables["ASPNETCORE_INPROCESS_STARTUP_VALUE"] = path;
+
+            await AssertFailsToStart(path, deploymentParameters);
+
+            Assert.Contains(TestSink.Writes, context => context.Message.Contains("Is Console redirection: True"));
+        }
+
+        private async Task AssertFailsToStart(string path, IntegrationTesting.IIS.IISDeploymentParameters deploymentParameters)
+        {
             var deploymentResult = await DeployAsync(deploymentParameters);
 
             var response = await deploymentResult.HttpClient.GetAsync(path);
@@ -63,8 +76,6 @@ namespace Microsoft.AspNetCore.Server.IISIntegration.FunctionalTests
             Assert.Equal(HttpStatusCode.InternalServerError, response.StatusCode);
 
             StopServer();
-
-            Assert.Contains(TestSink.Writes, context => context.Message.Contains(new string('a', 4096)));
         }
 
         [ConditionalFact]

test/WebSites/StartupExceptionWebSite/Program.cs

@@ -2,6 +2,8 @@
 // Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
 
 using System;
+using System.IO;
+using System.Text;
 
 namespace IISTestSite
 {
@@ -41,6 +43,14 @@ namespace IISTestSite
                 Console.Error.WriteLine(new string('a', 4096));
                 Console.Error.Flush();
             }
+            else if (envVariable == "CheckConsoleFunctions")
+            {
+                // Call a bunch of console functions and make sure none return invalid handle.
+                Console.OutputEncoding = Encoding.UTF8;
+                Console.Title = "Test";
+                Console.WriteLine($"Is Console redirection: {Console.IsOutputRedirected}");
+                Console.BackgroundColor = ConsoleColor.Blue;
+            }
         }
     }
 }