下载地址【相关模块】：https://www.pan38.com/dow/share.php?code=JCnzE 提取密码：2041
- 红包风控系统架构设计
class RedPacketAntiCheat: def init(self): self.user_limits = { 'daily_max': 200, # 单日领取上限 'speed_limit': 5, # 每分钟领取次数 'device_limit': 3 # 单设备账号数 } self.redis_conn = RedisCluster() def check_limit(self, user_id: str) -> bool: # 实时查询Redis计数器 today_key = f"redpacket:{datetime.today():%Y%m%d}:{user_id}" current = self.redis_conn.incr(today_key) if current > self.user_limits['daily_max']: return False return True
- 关键风控维度实现
2.1 频率检测模块
public class FrequencyChecker { private static final RateLimiter limiter = RateLimiter.create(5.0); // 令牌桶算法实现 public boolean allowRequest(String userId) { if (!limiter.tryAcquire()) { log.warn("用户{}触发频率限制", userId); return false; } return true; } }
2.2 设备指纹技术
function generateDeviceFingerprint() { const canvas = document.createElement('canvas'); const gl = canvas.getContext('webgl'); // 通过WebGL渲染生成硬件指纹 const debugInfo = gl.getExtension('WEBGL_debug_renderer_info'); return hash( gl.getParameter(debugInfo.UNMASKED_RENDERER_WEBGL) + navigator.hardwareConcurrency ); }
- 动态阈值算法
class DynamicThreshold: def init(self): self.base_limit = 100 self.current_factor = 1.0 def adjust_factor(self, server_load: float): """ 基于服务器负载动态调整 """ if server_load > 0.8: self.current_factor = 0.7 elif server_load < 0.3: self.current_factor = 1.5 def get_current_limit(self): return int(self.base_limit * self.current_factor)
- 异常行为检测模型
-- 风控特征表结构示例 CREATE TABLE risk_features ( user_id VARCHAR(32) PRIMARY KEY, click_speed FLOAT COMMENT '平均点击间隔(ms)', device_change_count INT COMMENT '设备切换次数', ip_geo_change BOOLEAN COMMENT '是否异地登录' ); -- 实时特征计算视图 CREATE VIEW realtime_risk AS SELECT user_id, COUNT(*)/TIMESTAMPDIFF(SECOND, MIN(ctime), MAX(ctime)) AS req_per_sec FROM redpacket_log GROUP BY user_id;
- 系统级防护措施
func (s Server) AddRateLimitMiddleware() gin.HandlerFunc { return func(c gin.Context) { if limiter.Allow() == false { c.JSON(429, gin.H{"code": "TOO_MANY_REQUESTS"}) c.Abort() return } c.Next() } }
