Global配置接口访问日志以及测试日志记录

在客户端请求接口时，经常会出现接口相应慢，接口等待超时，接口错误，为了这事相信不少后台开发者为此背锅，记下请求日志，拿出有力证据这才是关键。

1.接口请求错误记录

很多时候接口请求出现的500,404这些错误，请求当时出现如果客户端没有日志记录，有些问题是很难复现，虽然系统日志中也会记录，但是不够系统。

那么可以通过接下来的方式记录系统错误信息，这时我们可以在Global中添加Application_Error的处理：

 void Application_Error(object sender, EventArgs e)
        {
            //获取错误信息
            Exception lastError = Server.GetLastError();
            int httpCode = 200;
            HttpException httpError = lastError as HttpException;
            if (httpError != null)
            {
                //获取错误代码
                httpCode = httpError.GetHttpCode();
            }
            // 在出现未处理的错误时运行的代码
            Exception objErr = Server.GetLastError().GetBaseException();
            string error = string.Empty;
            string errortime = string.Empty;
            string erroraddr = string.Empty;
            string errorinfo = string.Empty;
            string errorsource = string.Empty;
            string errortrace = string.Empty;
            string errorcode = string.Empty;

            error += "发生时间:" + System.DateTime.Now.ToString() + "<br>";
            errortime = "发生时间:" + System.DateTime.Now.ToString();

            error += "发生异常页: " + Request.Url.ToString() + "<br>";
            erroraddr = "发生异常页: " + Request.Url.ToString();

            error += "返回状态码: " + httpCode + "<br>";
            errorcode = "返回状态码: " + httpCode;

            error += "异常信息: " + objErr.Message + "<br>";
            errorinfo = "异常信息: " + objErr.Message;
            //error +="错误源:"+objErr.Source+"<br>";
            //error += "堆栈信息:" + objErr.StackTrace + "<br>";
            errorsource = "错误源:" + objErr.Source;
            errortrace = "堆栈信息:" + objErr.StackTrace;
            error += "--------------------------------------<br>";
            Server.ClearError();
            Application["error"] = error;
            //独占方式，因为文件只能由一个进程写入.
            System.IO.StreamWriter writer = null;
            try
            {
                lock (this)
                {
                    // 写入日志
                    string year = DateTime.Now.Year.ToString();
                    string month = DateTime.Now.Month.ToString();
                    string path = string.Empty;
                    string filename = DateTime.Now.Day.ToString() + ".txt";
                    path = Server.MapPath("~/App_Data/log/") + year + "/" + month;
                    //如果目录不存在则创建
                    if (!System.IO.Directory.Exists(path))
                    {
                        System.IO.Directory.CreateDirectory(path);
                    }
                    System.IO.FileInfo file = new System.IO.FileInfo(path + "/" + filename);
                    //if (!file.Exists)
                    //    file.Create();
                    //file.Open(System.IO.FileMode.Append);       
                    writer = new System.IO.StreamWriter(file.FullName, true);//文件不存在就创建,true表示追加
                    writer.WriteLine("用户IP:" + Request.UserHostAddress);
                    // if (Session["Identity"] != null)
                    // {
                    //     writer.WriteLine("登录帐号:" System.Web.HttpContext.Current.Session["Identity"]).YongHuInfo.ACCOUNTID);
                    // }
                    writer.WriteLine(errortime);
                    writer.WriteLine(erroraddr);
                    writer.WriteLine(errorcode);
                    writer.WriteLine(errorinfo);
                    writer.WriteLine(errorsource);
                    writer.WriteLine(errortrace);
                    writer.WriteLine("--------------------------------------------------------------------------------------");
                }
            }
            finally
            {
                if (writer != null)
                    writer.Close();
            }
            //服务端返回状态码
            Response.StatusCode = 500;
            Response.AddHeader("errormsg", Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(objErr.Message)));
        }

2.接口请求记录

记录每一次请求接口的时间和参数，方便请求错误重现。

在Application_BeginRequest添加如下配置：

        void Application_BeginRequest(object source, EventArgs e)
        {
          
                var requestUrl = DateTime.Now + "请求链接" + Request.Url.ToString() + "
";
                var requestData = DateTime.Now + "请求参数" + ApiSign.GetxtParams() + "
";
                // 写入日志
                string year = DateTime.Now.Year.ToString();
                string month = DateTime.Now.Month.ToString();
                string path = string.Empty;
                string filename = DateTime.Now.Day.ToString() + "_request" + ".txt";
                path = Server.MapPath("~/App_Data/log/") + year + "/" + month;
                string Filepath=path + "/" + filename;

                if (requestUrl.ToUpper().IndexOf("API/") != -1)
                {
                    Task.Run(() =>{Ecio_Admin.Common.ToolKit.PrintText(requestUrl + requestData, Filepath, true);});
                }
        }

当然这里有一个比较常用的日志文件记录方法，这里把单独封装了PrintText。

  /// <summary>
        /// 本地打印文本记录
        /// </summary>
        /// <param name="text">需要写入的值</param>
        /// <param name="path">文件路径</param>
        /// <param name="IsAppend">是否追加至最后一行</param>
        /// <returns>追加结果</returns>
        public static void PrintText(string text, string path, bool IsAppend)
        {
            try
            {
                if (!Directory.Exists(path.Split(new string[] { path.Substring(path.LastIndexOf('\')) }, StringSplitOptions.RemoveEmptyEntries)[0]))
                    Directory.CreateDirectory(path);
                if (!File.Exists(path))
                {
                    using (System.IO.StreamWriter Creat = File.CreateText(path)) { }
                }
                if (IsAppend)
                {

                    using (System.IO.StreamWriter sw = new System.IO.StreamWriter(path, true))
                    {
                        lock (sw)
                        {
                            sw.WriteLine(text);
                        }
                    }
                }
                else
                {
                   System.IO.File.WriteAllText(path, text);
                }
            }
            catch { }
        }

3.记录接口请求时间

这里我是用了一个windows系统服务来轮询每一个接口的请求和响应时间，可以参考下面这个文章，建一个服务，然后测试接口响应时间。

http://www.cnblogs.com/loyung/p/6123317.html