Gérer les exceptions de son API .NET Core - ExceptionMiddleware

ExceptionMiddleware.cs

public class ExceptionMiddleware
{
    private readonly RequestDelegate _next;

    public ExceptionMiddleware(RequestDelegate next)
    {
        _next = next;
    }

    public async Task InvokeAsync(HttpContext httpContext)
    {
        try
        {
            await _next(httpContext);
        }
        catch (Exception ex)
        {
            await HandleExceptionAsync(httpContext, ex);
        }
    }

    private async Task HandleExceptionAsync(HttpContext context, Exception exception)
    {
        var appError = new AppError(exception);

        context.Response.ContentType = "application/json";
        context.Response.StatusCode = (int)appError.StatusCode;
        await context.Response.WriteAsync(appError.ToString());
    }
}