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 = ;
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 = ;
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() + "\r\n";
var requestData = DateTime.Now + "请求参数" + ApiSign.GetxtParams() + "\r\n";
// 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/") != -)
{
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)[]))
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