如何在 asp.net 核心 3.1 mvc web 應用程序中將日志保存到數據庫？

Question

我有中間件，我想用它來記錄哪個用戶訪問了哪個頁面以及他們得到了什么響應

public class RequestResponseLoggingMiddleware
{
    private readonly RequestDelegate _next;

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

    public async Task Invoke(HttpContext context)
    {
        var request = await FormatRequest(context.Request);
        var originalBodyStream = context.Response.Body;

        using (var responseBody = new MemoryStream())
        {
            context.Response.Body = responseBody;
            await _next(context);
            var response = await FormatResponse(context.Response);
            //TODO: Save log to chosen datastore
            await responseBody.CopyToAsync(originalBodyStream);
        }
    }

    private async Task<string> FormatRequest(HttpRequest request)
    {
        var body = request.Body;
        request.EnableBuffering();
        var buffer = new byte[Convert.ToInt32(request.ContentLength)];
        await request.Body.ReadAsync(buffer, 0, buffer.Length);
        var bodyAsText = Encoding.UTF8.GetString(buffer);
        request.Body = body;
        return $"{request.Scheme} {request.Host}{request.Path} {request.QueryString} {bodyAsText}";

    }

    private async Task<string> FormatResponse(HttpResponse response)
    {
        response.Body.Seek(0, SeekOrigin.Begin);
        return $"{response.StatusCode}";
    }

如何將 (UserId; Username; URL; TimeStamp; StatusCode) 等數據保存到我的數據庫中？ 提前致謝。

Answer 1

實際上你想使用序列化。 所以你必須看看Newton.Json nuget package。

Log log= new Log
{
    Email = "james@example.com",
    Active = true,
    CreatedDate = new DateTime(2013, 1, 20, 0, 0, 0, DateTimeKind.Utc),
    Roles = new List<string>
    {
        "User",
        "Admin"
    }
};

string json = JsonConvert.SerializeObject(log, Formatting.Indented);

將 json 作為列保存到 db 中。就是這樣。