本文转载自微信公众号「UP技术控」,作者conan5566。转载本文请联系UP技术控公众号。
背景
上回提到开发web api的时候,一般是需要记录api的输入输出信息,方便后续排查问题;使用的是委托的形式进行记录日志。
使用Func
这次我们使用另外一种方式,Filter来记录输入输出日志。
实现方式
1、首先在进入action的时候,定义OnActionExecuting。
- public override void OnActionExecuting(ActionExecutingContext context)
- {
- base.OnActionExecuting(context);
- // 后续添加了获取请求的请求体,如果在实际项目中不需要删除即可
- long contentLen = context.HttpContext.Request.ContentLength == null ? 0 : context.HttpContext.Request.ContentLength.Value;
- if (contentLen > 0)
- {
- // 读取请求体中所有内容
- System.IO.Stream stream = context.HttpContext.Request.Body;
- if (context.HttpContext.Request.Method == "POST")
- {
- stream.Position = 0;
- }
- byte[] buffer = new byte[contentLen];
- stream.Read(buffer, 0, buffer.Length);
- // 转化为字符串
- RequestBody = System.Text.Encoding.UTF8.GetString(buffer);
- }
- ActionArguments = Newtonsoft.Json.JsonConvert.SerializeObject(context.ActionArguments);
- Stopwatch = new Stopwatch();
- Stopwatch.Start();
- }
2、定义Stopwatch ,计算方法的耗时。
- private string ActionArguments { get; set; }
- /// <summary>
- /// 请求体中的所有值
- /// </summary>
- private string RequestBody { get; set; }
- private Stopwatch Stopwatch { get; set; }
3、结束的时候,把信息打印出来OnActionExecuted。
- public override void OnActionExecuted(ActionExecutedContext context)
- {
- base.OnActionExecuted(context);
- Stopwatch.Stop();
- string url = context.HttpContext.Request.Host + context.HttpContext.Request.Path + context.HttpContext.Request.QueryString;
- string method = context.HttpContext.Request.Method;
- string controller = context.Controller.ToString();
- string action = context.ActionDescriptor.DisplayName;
- string token = "";
- if (context.HttpContext.Request != null && context.HttpContext.Request.Headers != null && context.HttpContext.Request.Headers["Authorization"].Count > 0)
- {
- token = context.HttpContext.Request.Headers["Authorization"];
- }
- string qs = ActionArguments;
- dynamic result = context?.Result?.GetType()?.Name == "EmptyResult" ? new { Value = "无返回结果" } : context?.Result as dynamic;
- string res = "在返回结果前发生了异常";
- try
- {
- if (result != null)
- {
- res = Newtonsoft.Json.JsonConvert.SerializeObject(result.Value);
- }
- }
- catch (System.Exception)
- {
- res = "日志未获取到结果,返回的数据无法序列化";
- }
- NLogger.Info(
- $"地址:{url} \n " +
- $"controller:{controller} \n " +
- $"action:{action} \n " +
- $"token:{token} \n " +
- $"方式:{method} \n " +
- $"请求体:{RequestBody} \n " +
- $"参数:{qs}\n " +
- $"结果:{res}\n " +
- $"耗时:{Stopwatch.Elapsed.TotalMilliseconds} 毫秒(指控制器内对应方法执行完毕的时间)");
- }
4、控制器调用LogAttribute。
- /// <summary>
- ///
- /// </summary>
- [Produces("application/json")]
- [LogAttribute]
- [CustomExceptionFilterAttribute]
- public class DefaultController : Controller
- {
- }
完整代码
- using CompanyName.ProjectName.Core;
- using Microsoft.AspNetCore.Mvc.Filters;
- using System.Diagnostics;
- namespace CompanyName.ProjectName.HttpApi.Host.Code
- {
- /// <summary>
- /// 拦截器
- /// </summary>
- public class LogAttribute : ActionFilterAttribute
- {
- private string ActionArguments { get; set; }
- /// <summary>
- /// 请求体中的所有值
- /// </summary>
- private string RequestBody { get; set; }
- private Stopwatch Stopwatch { get; set; }
- /// <summary>
- ///
- /// </summary>
- /// <param name="context"></param>
- public override void OnActionExecuting(ActionExecutingContext context)
- {
- base.OnActionExecuting(context);
- // 后续添加了获取请求的请求体,如果在实际项目中不需要删除即可
- long contentLen = context.HttpContext.Request.ContentLength == null ? 0 : context.HttpContext.Request.ContentLength.Value;
- if (contentLen > 0)
- {
- // 读取请求体中所有内容
- System.IO.Stream stream = context.HttpContext.Request.Body;
- if (context.HttpContext.Request.Method == "POST")
- {
- stream.Position = 0;
- }
- byte[] buffer = new byte[contentLen];
- stream.Read(buffer, 0, buffer.Length);
- // 转化为字符串
- RequestBody = System.Text.Encoding.UTF8.GetString(buffer);
- }
- ActionArguments = Newtonsoft.Json.JsonConvert.SerializeObject(context.ActionArguments);
- Stopwatch = new Stopwatch();
- Stopwatch.Start();
- }
- /// <summary>
- ///
- /// </summary>
- /// <param name="context"></param>
- public override void OnActionExecuted(ActionExecutedContext context)
- {
- base.OnActionExecuted(context);
- Stopwatch.Stop();
- string url = context.HttpContext.Request.Host + context.HttpContext.Request.Path + context.HttpContext.Request.QueryString;
- string method = context.HttpContext.Request.Method;
- string controller = context.Controller.ToString();
- string action = context.ActionDescriptor.DisplayName;
- string token = "";
- if (context.HttpContext.Request != null && context.HttpContext.Request.Headers != null && context.HttpContext.Request.Headers["Authorization"].Count > 0)
- {
- token = context.HttpContext.Request.Headers["Authorization"];
- }
- string qs = ActionArguments;
- dynamic result = context?.Result?.GetType()?.Name == "EmptyResult" ? new { Value = "无返回结果" } : context?.Result as dynamic;
- string res = "在返回结果前发生了异常";
- try
- {
- if (result != null)
- {
- res = Newtonsoft.Json.JsonConvert.SerializeObject(result.Value);
- }
- }
- catch (System.Exception)
- {
- res = "日志未获取到结果,返回的数据无法序列化";
- }
- NLogger.Info(
- $"地址:{url} \n " +
- $"controller:{controller} \n " +
- $"action:{action} \n " +
- $"token:{token} \n " +
- $"方式:{method} \n " +
- $"请求体:{RequestBody} \n " +
- $"参数:{qs}\n " +
- $"结果:{res}\n " +
- $"耗时:{Stopwatch.Elapsed.TotalMilliseconds} 毫秒(指控制器内对应方法执行完毕的时间)");
- }
- }
- }