我需要在asp.net core 2.0 Web應用程序中記錄請求/響應。為此，我們創建了一個RequestLoggingMiddleware（請參見下文）。該解決方案的缺點在于，將在每個請求中讀取主體流。有沒有一種方法可以評估是否有針對特定日志級別配置的logprovider。例如，在沒有logprovider正在偵聽DebugLog-Level的情況下，我們不需要讀取主體流。public class RequestLoggingMiddleware{    public ILogger<RequestLoggingMiddleware> Logger { get; }    public RequestDelegate NextMiddleware { get; }    public RequestLoggingMiddleware(RequestDelegate nextMiddleware, ILogger<RequestLoggingMiddleware> logger)    {        NextMiddleware = nextMiddleware;        Logger = logger;    }    public async Task Invoke(HttpContext context)    {        using (MemoryStream loggableResponseStream = new MemoryStream())        {            Logger.LogDebug(await FormatRequest(context.Request));            await NextMiddleware(context);        }    }    private static async Task<string> FormatRequest(HttpRequest request)    {        Stream body = request.Body;        request.EnableRewind();        byte[] buffer = new byte[Convert.ToInt32(request.ContentLength)];        await request.Body.ReadAsync(buffer, 0, buffer.Length);        string bodyAsText = Encoding.UTF8.GetString(buffer);        request.Body = body;        var messageObjToLog = new        {            scheme = request.Scheme,            host = request.Host,            path = request.Path,            queryString = request.Query,            requestBody = bodyAsText        };        return JsonConvert.SerializeObject(messageObjToLog);    }}