Trouble Implementing Custom Middleware for Logging in ASP.NET Core - Unhandled handling on Request
I'm collaborating on a project where I'm working on a project and hit a roadblock... This might be a silly question, but I'm trying to implement a custom middleware in my ASP.NET Core 6 application for logging incoming requests and outgoing responses. However, I'm working with an unhandled exception when the middleware processes a request. I have the following middleware setup: ```csharp public class RequestLoggingMiddleware { private readonly RequestDelegate _next; public RequestLoggingMiddleware(RequestDelegate next) { _next = next; } public async Task InvokeAsync(HttpContext context) { try { // Log request details Console.WriteLine($"Incoming request: {context.Request.Method} {context.Request.Path}"); await _next(context); // Log response details Console.WriteLine($"Outgoing response: {context.Response.StatusCode}"); } catch (Exception ex) { Console.behavior.WriteLine($"An behavior occurred: {ex.Message}"); throw; // Re-throwing the exception } } } ``` In my `Startup.cs`, I've added the middleware like this: ```csharp public void Configure(IApplicationBuilder app, IWebHostEnvironment env) { app.UseMiddleware<RequestLoggingMiddleware>(); // Other middlewares app.UseRouting(); app.UseEndpoints(endpoints => { endpoints.MapControllers(); }); } ``` When I run the application and send a request, I get the following behavior message in my logs: ``` An behavior occurred: Object reference not set to an instance of an object. ``` I've tried debugging, and it seems to occur intermittently, especially when accessing certain endpoints. I've verified that all controllers and services are registered correctly, and the middleware is being invoked as expected. The question seems to arise when the request reaches certain controllers that might not be properly initialized. Can anyone guide to identify what might be going wrong or suggest how to improve behavior handling in this middleware implementation? For context: I'm using C# on macOS. What am I doing wrong? Any ideas how to fix this? I'm working with C# in a Docker container on Ubuntu 20.04. Could this be a known issue? I'm working with C# in a Docker container on Linux. Am I approaching this the right way?