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https://github.com/skyle1995/NetworkAuth.git
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调整日志和鉴权接管方案
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58
middleware/ratelimit.go
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58
middleware/ratelimit.go
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@@ -0,0 +1,58 @@
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package middleware
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import (
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"NetworkAuth/utils"
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"context"
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"fmt"
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"net/http"
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"time"
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"github.com/gin-gonic/gin"
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)
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// RateLimit 基于 Redis 的简单固定窗口限流中间件
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// limit: 时间窗口内允许的最大请求数
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// window: 时间窗口大小
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func RateLimit(limit int, window time.Duration) gin.HandlerFunc {
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return func(c *gin.Context) {
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client := utils.GetRedis()
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if client == nil {
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// 如果 Redis 未配置或不可用,则放行(降级处理)
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c.Next()
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return
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}
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ip := c.ClientIP()
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path := c.FullPath()
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if path == "" {
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path = c.Request.URL.Path
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}
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// 构建 Redis Key,按 IP 和接口路径限制
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key := fmt.Sprintf("ratelimit:%s:%s", path, ip)
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ctx := context.Background()
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// 使用 INCR 增加计数
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count, err := client.Incr(ctx, key).Result()
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if err != nil {
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c.Next()
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return
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}
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// 如果是第一次访问,设置过期时间
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if count == 1 {
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client.Expire(ctx, key, window)
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}
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if count > int64(limit) {
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c.JSON(http.StatusTooManyRequests, gin.H{
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"code": 429,
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"msg": "请求过于频繁,请稍后再试",
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})
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c.Abort()
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return
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}
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c.Next()
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}
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}
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