mirror of
https://github.com/WJQSERVER-STUDIO/ghproxy.git
synced 2026-02-02 15:51:11 +08:00
107 lines
2.4 KiB
Go
107 lines
2.4 KiB
Go
package rate
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import (
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"sync"
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"time"
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"github.com/WJQSERVER-STUDIO/logger"
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"golang.org/x/time/rate"
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)
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// 日志模块
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var (
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logw = logger.Logw
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logDump = logger.LogDump
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logDebug = logger.LogDebug
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logInfo = logger.LogInfo
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logWarning = logger.LogWarning
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logError = logger.LogError
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)
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// RateLimiter 总体限流器
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type RateLimiter struct {
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limiter *rate.Limiter
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}
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// New 创建一个总体限流器
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func New(limit int, burst int, duration time.Duration) *RateLimiter {
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if limit <= 0 {
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limit = 1
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logWarning("rate limit per minute must be positive, setting to 1")
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}
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if burst <= 0 {
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burst = 1
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logWarning("rate limit burst must be positive, setting to 1")
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}
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rateLimit := rate.Limit(float64(limit) / duration.Seconds())
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return &RateLimiter{
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limiter: rate.NewLimiter(rateLimit, burst),
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}
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}
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// Allow 检查是否允许请求通过
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func (rl *RateLimiter) Allow() bool {
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return rl.limiter.Allow()
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}
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// IPRateLimiter 基于IP的限流器
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type IPRateLimiter struct {
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limiters map[string]*RateLimiter // 用户级限流器 map
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mu sync.RWMutex // 保护 limiters map
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limit int // 每 duration 时间段内允许的请求数
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burst int // 突发请求数
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duration time.Duration // 限流周期
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}
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// NewIPRateLimiter 创建一个基于IP的限流器
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func NewIPRateLimiter(ipLimit int, ipBurst int, duration time.Duration) *IPRateLimiter {
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if ipLimit <= 0 {
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ipLimit = 1
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logWarning("IP rate limit per minute must be positive, setting to 1")
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}
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if ipBurst <= 0 {
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ipBurst = 1
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logWarning("IP rate limit burst must be positive, setting to 1")
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}
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logInfo("IP Rate Limiter initialized with limit: %d, burst: %d, duration: %v", ipLimit, ipBurst, duration)
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return &IPRateLimiter{
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limiters: make(map[string]*RateLimiter),
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limit: ipLimit,
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burst: ipBurst,
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duration: duration,
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}
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}
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// Allow 检查给定IP的请求是否允许通过
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func (rl *IPRateLimiter) Allow(ip string) bool {
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if ip == "" {
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logWarning("empty ip for rate limiting")
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return false
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}
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// 使用读锁快速查找
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rl.mu.RLock()
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limiter, found := rl.limiters[ip]
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rl.mu.RUnlock()
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if found {
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return limiter.Allow()
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}
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// 未找到，获取写锁来创建和添加
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rl.mu.Lock()
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// 双重检查
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limiter, found = rl.limiters[ip]
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if !found {
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newL := New(rl.limit, rl.burst, rl.duration)
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rl.limiters[ip] = newL
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limiter = newL
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}
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rl.mu.Unlock()
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return limiter.Allow()
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}
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