Adding shutdown http message to support the scenario that ctrl signal is not allowed (#118)

Author: pan-wang

src/AspNetCore/Inc/resource.h

@@ -16,3 +16,5 @@
 #define ASPNETCORE_EVENT_PROCESS_START_NOTREADY_ERROR_MSG    L"Application '%s' with physical root '%s' created process with commandline '%s' but either crashed or did not reponse or did not listen on the given port '%d', ErrorCode = '0x%x'"
 #define ASPNETCORE_EVENT_INVALID_STDOUT_LOG_FILE_MSG         L"Warning: Could not create stdoutLogFile %s, ErrorCode = %d."
 #define ASPNETCORE_EVENT_GRACEFUL_SHUTDOWN_FAILURE_MSG       L"Failed to gracefully shutdown process '%d'."
+#define ASPNETCORE_EVENT_SENT_SHUTDOWN_HTTP_REQUEST_MSG      L"Sent shutdown HTTP message to process '%d' and received http status '%d'."
+

src/AspNetCore/Inc/serverprocess.h

@@ -252,6 +252,27 @@ class SERVER_PROCESS
         return digits;
     }
 
+    static
+    VOID
+    SendShutDownSignal(
+        LPVOID lpParam
+        );
+
+    VOID
+    SendShutDownSignalInternal(
+        VOID
+    );
+
+    HRESULT
+    SendShutdownHttpMessage(
+        VOID
+    );
+
+    VOID
+    TerminateBackendProcess(
+        VOID
+    );
+
     FORWARDER_CONNECTION   *m_pForwarderConnection;
     BOOL                    m_fStdoutLogEnabled;
     BOOL                    m_fWindowsAuthEnabled;
@@ -291,6 +312,11 @@ class SERVER_PROCESS
     HANDLE                  m_hProcessHandle;
     HANDLE                  m_hListeningProcessHandle;
     HANDLE                  m_hProcessWaitHandle;
+    HANDLE                  m_hShutdownHandle;
+    //
+    // m_hChildProcessHandle is the handle to process created by 
+    // m_hProcessHandle process if it does.
+
     //
     // m_hChildProcessHandle is the handle to process created by 
     // m_hProcessHandle process if it does.

src/AspNetCore/Src/aspnetcore_msg.mc

@@ -61,6 +61,12 @@ Language=English
 %1
 .
 
+Messageid=1006
+SymbolicName=ASPNETCORE_EVENT_SENT_SHUTDOWN_HTTP_REQUEST
+Language=English
+%1
+.
+
 ;
 ;#endif     // _ASPNETCORE_MODULE_MSG_H_
 ;