.NetCore 接口请求耗时记录

通过日志，记录每个接口请求的耗时情况

结合  <logger name="*" level="Trace" writeTo="tracefile"/> 配置使用，NLog 热生效不需要重启服务

增加 RequestLogMiddleware.cs

public class RequestLogMiddleware
{
    /// <summary>
    /// 
    /// </summary>
    private readonly RequestDelegate _next;
    /// <summary>
    /// 
    /// </summary>
    private readonly Logger logger = LogManager.GetCurrentClassLogger();
    /// <summary>
    /// 
    /// </summary>
    /// <param name="next"></param>
    public RequestLogMiddleware(RequestDelegate next, ILogger<RequestLogMiddleware> logger)
    {
        _next = next;
    }
    /// <summary>
    /// 访问日志记录
    /// </summary>
    /// <param name="context"></param>
    /// <returns></returns>
    public async Task Invoke(HttpContext context)
    {
        //if (_RequestLogOptions != null & _RequestLogOptions.CurrentValue != null & _RequestLogOptions.CurrentValue.Enable)
        {
            var watch = new Stopwatch();
            watch.Start();
            context.Response.OnStarting(() =>
            {
                watch.Stop();
                try
                {
                    //排序 .jpg .css .js 等资源文件
                    if (!context.Request.Path.Value.Contains("."))
                    {
                        var headers = context.Request.Headers;
                        if (headers.ContainsKey("X-Forwarded-For"))
                        {
                            context.Connection.RemoteIpAddress = IPAddress.Parse(headers["X-Forwarded-For"].ToString().Split(',', StringSplitOptions.RemoveEmptyEntries)[0]);
                        }
                        var ip = context.Connection.RemoteIpAddress.MapToIPv4().ToString();
                        logger.Trace($"{ip}|{context.Response.StatusCode}|{watch.ElapsedMilliseconds}|{context.Request.Method} => {context.Request.Path.Value}{context.Request.QueryString}");
                    }
                }
                finally
                {
                }
                return Task.CompletedTask;
            });
        }
        await _next.Invoke(context);
    }
}

/// <summary>
/// 请求记录中间件扩展类
/// </summary>
public static class RequestLogMiddlewareExtensions
{
    /// <summary>
    /// 添加请求日志记录中间件
    /// </summary>
    /// <param name="builder"></param>
    /// <remarks>
    /// 日志格式 Host ==> ConnectId ==> Scheme ==> Method ==> Path ==> QueryString ==>Response Status ==> Response ContentLength ==> Response Time
    /// 日志记录级别为 Trace
    /// </remarks>
    /// <returns></returns>
    public static IApplicationBuilder UseRequestLogHandler(this IApplicationBuilder builder)
    {
        builder.UseMiddleware<RequestLogMiddleware>();
        return builder;
    }
}