Asp.Net网站统一处理错误信息

Exception ex = Server.GetLastError().GetBaseException();
StringBuilder sb = new StringBuilder();
sb.AppendLine(DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss"));

//有被注入风险
string ip = "";

if (Request.ServerVariables.Get("HTTP_X_FORWARDED_FOR") != null)
{
ip = Request.ServerVariables.Get("HTTP_X_FORWARDED_FOR").ToString().Trim();
}
else
{
ip = Request.ServerVariables.Get("Remote_Addr").ToString().Trim();
}

sb.AppendLine("IP地址:" + ip);
sb.AppendLine("浏览器:" + Request.Browser.Browser.ToString());
sb.AppendLine("浏览器版本:" + Request.Browser.MajorVersion.ToString());
sb.AppendLine("操作系统:" + Request.Browser.Platform.ToString());
sb.AppendLine("错误信息：");
sb.AppendLine("请求地址：" + Request.Url.ToString());
sb.AppendLine("错误信息：" + ex.Message);
sb.AppendLine("错误源：" + ex.Source);
sb.AppendLine("异常方法：" + ex.TargetSite);
sb.AppendLine("堆栈信息：" + ex.StackTrace);
sb.AppendLine("====================================================================================================================");

string logFilePath = Server.MapPath("~/log/");

if (!Directory.Exists(logFilePath))
{
Directory.CreateDirectory(logFilePath);
}

File.AppendAllText(logFilePath + DateTime.Now.ToString("yyyy.MM.dd") + ".log", sb.ToString(), Encoding.UTF8);

Server.ClearError();
Response.Redirect("myError.htm");