Implement global exception handling and improve error logging

- Added a terminate handler to log unhandled exceptions and abort the program gracefully.
- Introduced a Windows-specific exception handler to log detailed information about unhandled exceptions on Windows systems.
- Updated the main function to set the terminate handler and Windows exception filter, enhancing the robustness of the application.

These changes improve error handling and logging capabilities, ensuring better diagnostics and stability during runtime.

src/main.cpp

@@ -1,5 +1,11 @@
 #include <argparse/argparse.hpp>
+#include <exception>
 #include <iostream>
+#include <cstdlib>
+
+#ifdef _WIN32
+#include <windows.h>
+#endif
 
 #include "api_server.hpp"
 #include "auth_middleware.hpp"
@@ -42,8 +48,38 @@ void initializeDatabase(std::shared_ptr<ConfigManager> config_manager) {
     }
 }
 
+void terminateHandler() {
+    CROW_LOG_ERROR << "Unhandled exception caught! flapi is giving up :-(";
+
+    auto ex = std::current_exception();
+    try {
+        std::rethrow_exception (ex);
+    } catch (const std::exception& e) {
+        CROW_LOG_ERROR << "exception caught: " << e.what();
+    }
+    std::abort();
+}
+
+#ifdef _WIN32
+
+LONG WINAPI windowsExceptionHandler(EXCEPTION_POINTERS* exceptionInfo) {
+    CROW_LOG_ERROR << "Unhandled Windows exception caught!";
+    CROW_LOG_ERROR << "Exception code: " << std::hex << exceptionInfo->ExceptionRecord->ExceptionCode;
+    CROW_LOG_ERROR << "Address: " << exceptionInfo->ExceptionRecord->ExceptionAddress;
+
+    // Return control to Windows
+    return EXCEPTION_EXECUTE_HANDLER;
+}
+
+#endif
+
 int main(int argc, char* argv[]) 
 {
+    std::set_terminate(terminateHandler);
+#ifdef _WIN32
+    SetUnhandledExceptionFilter(windowsExceptionHandler);
+#endif
+
     static argparse::ArgumentParser program("flapi");
 
     program.add_argument("-c", "--config")