Go语言限流与防爬：API安全防护

Go语言限流与防爬API安全防护1. 限流概述API限流防止恶意访问和爬虫Go语言可以通过令牌桶算法实现高效的限流。2. 限流实现package rate import ( sync time ) type RateLimiter struct { rate float64 capacity int tokens float64 lastTime time.Time mu sync.Mutex } func NewRateLimiter(rate float64, capacity int) *RateLimiter { return RateLimiter{ rate: rate, capacity: capacity, tokens: float64(capacity), lastTime: time.Now(), } } func (rl *RateLimiter) Allow() bool { rl.mu.Lock() defer rl.mu.Unlock() now : time.Now() elapsed : now.Sub(rl.lastTime).Seconds() rl.lastTime now rl.tokens elapsed * rl.rate if rl.tokens float64(rl.capacity) { rl.tokens float64(rl.capacity) } if rl.tokens 1 { rl.tokens-- return true } return false } func (rl *RateLimiter) AllowN(n int) bool { rl.mu.Lock() defer rl.mu.Unlock() if float64(n) rl.tokens { rl.tokens - float64(n) return true } return false }3. 总结限流是API安全的重要手段令牌桶算法是实现限流的经典算法。