IP白名单优化

src/utils/ratelimiter.go

@@ -25,6 +25,7 @@ type IPRateLimiter struct {
 	b                int
 	whitelist        []*net.IPNet
 	blacklist        []*net.IPNet
+	whitelistLimiter *rate.Limiter // 全局共享的白名单限流器
 }
 
 // rateLimiterEntry 限流器条目
@@ -81,6 +82,7 @@ func InitGlobalLimiter() *IPRateLimiter {
 		b:                burstSize,
 		whitelist:        whitelist,
 		blacklist:        blacklist,
+		whitelistLimiter: rate.NewLimiter(rate.Inf, burstSize),
 	}
 
 	go limiter.cleanupRoutine()
@@ -170,7 +172,7 @@ func (i *IPRateLimiter) GetLimiter(ip string) (*rate.Limiter, bool) {
 	}
 
 	if isIPInCIDRList(cleanIP, i.whitelist) {
-		return rate.NewLimiter(rate.Inf, i.b), true
+		return i.whitelistLimiter, true
 	}
 
 	normalizedIP := normalizeIPForRateLimit(cleanIP)