本程序采用.net平台和mysql数据库实现

mysql数据库中表：

CREATE TABLE `web_statistics` (
 `id` int(10) unsigned NOT NULL auto_increment,
 `Cur_url` varchar(500) NOT NULL,
 `Pre_url` varchar(500) NOT NULL default '未知',
 `Os` varchar(50) NOT NULL default '未知',
 `Ip` varchar(15) NOT NULL,
 `Browser` varchar(50) NOT NULL default '未知',
 `Access_Time` datetime NOT NULL,
 `Host_Name` varchar(45) NOT NULL default '未知',
 PRIMARY KEY  (`id`)
)

mysql存储过程：

CREATE  PROCEDURE `proc_statistics`(Cur_url varchar(500),Pre_url varchar(500),Os varchar(50),Brows varchar(50),Host_Name varchar(45),Ip varchar(15))
begin
insert into web_statistics(Cur_url,Pre_url,Os,Ip,Browser,Access_Time,Host_Name)
values(Cur_url,Pre_url,Os,Ip,Brows,now(),Host_Name);
end

ashx执行平台代码：

using System;
using System.Web;
using MySql.Data;
using MySql.Data.MySqlClient;
using MySql.Data.Types;
using System.Data;
public class Statistics : IHttpHandler {

 public void ProcessRequest (HttpContext context) {
 context.Response.ContentType = "image/jpg";
 string url_cur = "加载当前Url错误";
 string url_pre = "直接访问";
 if (context.Request.QueryString["d"] != null)
 {
 url_pre = System.Web.HttpContext.Current.Server.UrlDecode(context.Request.QueryString["d"].ToString()).Replace("`","&");
 if (url_pre == "")
 {
 url_pre = "直接访问";
 }
 }
 if (context.Request.QueryString["u"] != null)
 {
 url_cur = System.Web.HttpContext.Current.Server.UrlDecode(context.Request.QueryString["u"].ToString()).Replace("`", "&");
 }
 string[] data = GetData();
 string con_mysql = System.Configuration.ConfigurationManager.ConnectionStrings["mysql"].ToString();
 MySqlConnection conn;
 MySqlCommand cmd ;
 try
 {
 conn = new MySqlConnection(con_mysql);
 conn.Open();
 cmd = new MySqlCommand();
 cmd.Connection = conn;
 //存储过程实现

 cmd.CommandText = "proc_statistics";
 cmd.CommandType = CommandType.StoredProcedure;
 MySqlParameter para1 = new MySqlParameter("Cur_url", MySqlDbType.VarChar, 500);
 MySqlParameter para2 = new MySqlParameter("Pre_url", MySqlDbType.VarChar, 500);
 MySqlParameter para3 = new MySqlParameter("Os", MySqlDbType.VarChar, 50);
 MySqlParameter para4 = new MySqlParameter("Ip", MySqlDbType.VarChar, 15);
 MySqlParameter para5 = new MySqlParameter("Brows", MySqlDbType.VarChar, 50);
 MySqlParameter para7 = new MySqlParameter("Host_Name", MySqlDbType.VarChar, 45);
 para1.Value = url_cur;
 para2.Value = url_pre;
 para3.Value = data[1];
 para4.Value = data[3];
 para5.Value = data[2];
 para7.Value = data[0];
 cmd.Parameters.Add(para1);
 cmd.Parameters.Add(para2);
 cmd.Parameters.Add(para3);
 cmd.Parameters.Add(para4);
 cmd.Parameters.Add(para5);
 cmd.Parameters.Add(para7);

 //参数实现
 /*
 cmd.CommandType = CommandType.Text;
 //直接拼接字符串实现
 //string sql = "insert into web_statistics(Cur_url,Pre_url,Os,Ip,Browser,Access_Time,Host_Name)values('"+url_cur+"','"+url_pre+"','"+data[1]+"','"+data[3]+"','"+data[2]+"',now(),'"+data[0]+"')";
 //sql语句参数实现
 string sql = "insert into web_statistics(Cur_url,Pre_url,Os,Ip,Browser,Access_Time,Host_Name)values(?Cur_url,?Pre_url,?Os,?Ip,?Brows,now(),?Host_Name)";
 cmd.CommandText = sql;
 MySqlParameter para1 = new MySqlParameter("?Cur_url", MySqlDbType.VarChar,500);
 MySqlParameter para2 = new MySqlParameter("?Pre_url", MySqlDbType.VarChar, 500);
 MySqlParameter para3 = new MySqlParameter("?Os", MySqlDbType.VarChar, 50);
 MySqlParameter para4 = new MySqlParameter("?Ip", MySqlDbType.VarChar, 15);
 MySqlParameter para5 = new MySqlParameter("?Brows", MySqlDbType.VarChar, 50);
 MySqlParameter para7 = new MySqlParameter("?Host_Name", MySqlDbType.VarChar, 45);
 para1.Value = url_cur;
 para2.Value = url_pre;
 para3.Value = data[1];
 para4.Value = data[3];
 para5.Value=data[2];
 para7.Value = data[0];
 cmd.Parameters.Add(para1);
 cmd.Parameters.Add(para2);
 cmd.Parameters.Add(para3);
 cmd.Parameters.Add(para4);
 cmd.Parameters.Add(para5);
 cmd.Parameters.Add(para7);
 */

 cmd.ExecuteNonQuery();
 cmd.Dispose();
 conn.Close();
 }
 catch {}
 //输入图片
 string img_name = "statistics.jpg";
 //直接输出图片
 //  context.Response.WriteFile(context.Server.MapPath(img_name));

 //缓冲输出图片
 byte[] datas;
 if (HttpContext.Current.Cache["datacache"] != null)
 {
 datas = (byte[])HttpContext.Current.Cache["datacache"];
 }
 else
 {
 //记得修改文件图片名称
 datas = System.IO.File.ReadAllBytes(context.Server.MapPath(img_name));
 HttpContext.Current.Cache.Insert("datacache", datas, null, DateTime.MaxValue, TimeSpan.FromHours(12));
 }
 context.Response.OutputStream.Write(datas, 0, datas.Length);

 }

 public  string[] GetData()
 {
 string[] data = new string[4];
 string userAgent = System.Web.HttpContext.Current.Request.UserAgent == null ? "无" : System.Web.HttpContext.Current.Request.UserAgent;
 data[0] = System.Web.HttpContext.Current.Request.ServerVariables.Get("Remote_Host").ToString(); //主机名（暂时有问题）
 data[1] = System.Web.HttpContext.Current.Request.Browser.Platform.ToString() + "：" + GetOSNameByUserAgent(userAgent);//操作系统
 data[2] = System.Web.HttpContext.Current.Request.Browser.Browser.ToString() + "：" + System.Web.HttpContext.Current.Request.Browser.Version.ToString();//浏览器名称和版本
 string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
 if (null == result || result == String.Empty)
 {
 result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
 }
 if (null == result || result == String.Empty)
 {
 result = HttpContext.Current.Request.UserHostAddress;
 }
 data[3] = result;//ip地址
 return data;
 }
 private  string GetOSNameByUserAgent(string userAgent)
 {
 string osVersion = "未知";
 if (userAgent.Contains("NT 6.1"))
 {
 osVersion = "Windows 7/Server 2008 R2";
 }
 else if (userAgent.Contains("NT 5.2"))
 {
 osVersion = "Windows Server 2003";
 }
 else if (userAgent.Contains("NT 5.1"))
 {
 osVersion = "Windows XP";
 }
 else if (userAgent.Contains("NT 6.0"))
 {
 osVersion = "Windows Vista/Server 2008";
 }
 else if (userAgent.Contains("NT 5"))
 {
 osVersion = "Windows 2000";
 }
 else if (userAgent.Contains("Linux"))
 {
 osVersion = "Linux";
 }
 else if (userAgent.Contains("NT 4"))
 {
 osVersion = "Windows NT4";
 }
 else if (userAgent.Contains("Me"))
 {
 osVersion = "Windows Me";
 }
 else if (userAgent.Contains("98"))
 {
 osVersion = "Windows 98";
 }
 else if (userAgent.Contains("95"))
 {
 osVersion = "Windows 95";
 }
 else if (userAgent.Contains("Mac"))
 {
 osVersion = "Mac";
 }
 else if (userAgent.Contains("Unix"))
 {
 osVersion = "UNIX";
 }

 else if (userAgent.Contains("SunOS"))
 {
 osVersion = "SunOS";
 }
 return osVersion;
 }
 public bool IsReusable {
 get {
 return false;
 }
 }

}

实现调用：
因为我把本程序部署在dag.wzu.edu.cn域名的服务器上，所以可以直接通过html+js代码就可以实现客户端的访问统计功能

<img  style="width:0px;height:0px;border:0px" id="statistics_id_fei" /><script type="text/javascript"> window.onload = function () { document.getElementById("statistics_id_fei").src = "http://dag.wzu.edu.cn/statistics.ashx?d="+ encodeURI(document.referrer).replace('&', '`') + "&u=" + encodeURI(document.location.href).replace('&', '`') + "&x=" + Math.random(); }</script>

说明：

1、在执行文件ashx上，采用了多种可选方式，其中数据库方面有直接拼接sql，sql参数方法，存储过程调用三种方法；
2、为了能够是js中的onload事件能够执行，加载完ashx文件后，生成一个对应的图片文件，采用了直接加载cache缓存方式实现；
3、只要直接把这里的html和js代码复制到你网址的直接的任何地方就可以实现自己站点的访问量统计。