web api 限制单个IP在一定时间内访问次数
https://www.cnblogs.com/zoro-zero/p/6208213.html
ps:下面实例是每隔30秒访问次数不超过3次
1、Filter:
复制代码
using Infrastructure.Log;
using Infrastructure.Web;
using Lemon.Stats.Model;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Http;
using System.Threading.Tasks;
using System.Web.Http.Controllers;
using System.Web.Http.Filters;
namespace Lemon.Stats.Apis
{
///
/// 限制单个IP短时间内访问次数
///
[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = false)]
public class IPActionFilterAttribute : ActionFilterAttribute
{
///
/// 限制单个IP短时间内访问次数
///
///
public override void OnActionExecuting(HttpActionContext actionContext)
{
string ip = HttpHelper.GetClientIp(actionContext.Request);
//var isValid = IPCacheHelper.CheckIsAble(ip);
IPCacheInfoModel ipModel = IPCacheHelper.GetIPLimitInfo(ip);
if (!ipModel.IsVisit)
{
Logger.Warn(string.Format("IP【{0}】被限制了【{1}】次数",ipModel.IP,ipModel.Limit));
actionContext.Response = actionContext.Request.CreateResponse(HttpStatusCode.BadRequest, "系统正忙,请稍微再试。");
return;
}
base.OnActionExecuting(actionContext);
}
}
}
复制代码
2、IPCacheHelper:
复制代码
using Lemon.Stats.Model;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Lemon.Stats.Apis
{
///
/// 限制单个IP访问次数
///
public class IPCacheHelper
{
///
/// IP缓存集合
///
private static List
private static object lockObj = new object();
/// <summary>
/// 一段时间内,最大请求次数,必须大于等于1
///</summary>
private static int maxTimes = 3;
/// <summary>
/// 一段时间长度(单位秒),必须大于等于1
/// </summary>
private static int partSecond = 30;
/// <summary>
/// 请求被拒绝是否加入请求次数
/// </summary>
private static bool isFailAddIn = false;
static IPCacheHelper()
{
}
/// <summary>
/// 设置时间,默认maxTimes=3, partSecond=30
/// </summary>
/// <param name="_maxTimes">最大请求次数</param>
/// <param name="_partSecond">请求单位时间</param>
public static void SetTime(int _maxTimes, int _partSecond)
{
maxTimes = _maxTimes;
partSecond = _partSecond;
}
/// <summary>
/// 检测一段时间内,IP的请求次数是否可以继续请求和使用
/// </summary>
/// <param name="ip">ip</param>
/// <returns></returns>
public static bool CheckIsAble(string ip)
{
lock (lockObj)
{
var item = dataList.Find(p => p.IP == ip);
if (item == null)
{
item = new IPCacheInfoModel();
item.IP = ip;
item.ReqTime.Add(DateTime.Now);
dataList.Add(item);
return true;
}
else
{
if (item.ReqTime.Count > maxTimes)
{
item.ReqTime.RemoveAt(0);
}
var nowTime = DateTime.Now;
if (isFailAddIn)
{
#region 请求被拒绝也需要加入当次请求
item.ReqTime.Add(nowTime);
if (item.ReqTime.Count >= maxTimes)
{
if (item.ReqTime[0].AddSeconds(partSecond) > nowTime)
{
return false;
}
else
{
return true;
}
}
else
{
return true;
}
#endregion
}
else
{
#region 请求被拒绝就不需要加入当次请求了
if (item.ReqTime.Count >= maxTimes)
{
if (item.ReqTime[0].AddSeconds(partSecond) > nowTime)
{
return false;
}
else
{
item.ReqTime.Add(nowTime);
return true;
}
}
else
{
item.ReqTime.Add(nowTime);
return true;
}
#endregion
}
}
}
}
/// <summary>
/// 检测一段时间内,IP的请求次数是否可以继续请求和使用
/// </summary>
/// <param name="ip">ip</param>
/// <returns></returns>
public static IPCacheInfoModel GetIPLimitInfo(string ip)
{
lock (lockObj)
{
var item = dataList.Find(p => p.IP == ip);
if (item == null) //IP开始访问
{
item = new IPCacheInfoModel();
item.IP = ip;
item.ReqTime.Add(DateTime.Now);
dataList.Add(item);
item.IsVisit = true; //可以继续访问
return item;
}
else
{
if (item.ReqTime.Count > maxTimes)
{
item.ReqTime.RemoveAt(0);
}
var nowTime = DateTime.Now;
if (isFailAddIn)
{
#region 请求被拒绝也需要加入当次请求
item.ReqTime.Add(nowTime);
if (item.ReqTime.Count >= maxTimes)
{
if (item.ReqTime[0].AddSeconds(partSecond) > nowTime)
{
item.Limit++; //限制次数+1
item.IsVisit = false;//不能继续访问
return item;
}
else
{
item.IsVisit = true; //可以继续访问
return item; //单个IP30秒内 没有多次访问
}
}
else
{
item.IsVisit = true; //可以继续访问
return item; //单个IP访问次数没有达到max次数
}
#endregion
}
else
{
#region 请求被拒绝就不需要加入当次请求了
if (item.ReqTime.Count >= maxTimes)
{
if (item.ReqTime[0].AddSeconds(partSecond) > nowTime)
{
item.Limit++; //限制次数+1
item.IsVisit = false;//不能继续访问
return item;
}
else
{
item.ReqTime.Add(nowTime);
item.IsVisit = true; //可以继续访问
return item;
}
}
else
{
item.ReqTime.Add(nowTime);
item.IsVisit = true; //可以继续访问
return item;
}
#endregion
}
}
}
}
}
}
复制代码
3、IPCacheInfoModel:
复制代码
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace Lemon.Stats.Model
{
public class IPCacheInfoModel
{
///
/// IP
///
public string IP { get; set; }
/// <summary>
/// 限制次数
/// </summary>
public int Limit { get; set; }
/// <summary>
/// 是否可以访问
/// </summary>
public bool IsVisit { get; set; }
/// <summary>
/// 访问时间
/// </summary>
private List<DateTime> reqTime = new List<DateTime>();
/// <summary>
/// 访问时间
/// </summary>
public List<DateTime> ReqTime
{
get { return this.reqTime; }
set { this.reqTime = value; }
}
}
}
复制代码
4、Action:
复制代码
///
/// IP,PV(VV),UV,注册用户点击量统计
/// 先执行IPActionFilter过滤器,再执行ChannelActionFilter过滤器
/// 先执行后面的过滤器,再执行前面的过滤器,执行方式倒序执行顺序
///
[ChannelActionFilter, IPActionFilter, RoutePrefix("Stats")]
public class StatsController : ApiController
{
/// <summary>
/// 每次页面点击都统计数据,直接由客户端调用
/// Header中加入SecretKey,AppKey,UniqueKey
/// </summary>
/// <returns></returns>
[HttpGet, Route("")]
public async Task Get()
{
}
}
复制代码