126 lines
3.5 KiB
Go
126 lines
3.5 KiB
Go
package middleware
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import (
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"fmt"
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"strings"
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"gitee.com/red-future---jilin-g/common/redis"
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"gitee.com/red-future---jilin-g/common/utils"
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"github.com/gogf/gf/v2/frame/g"
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"github.com/gogf/gf/v2/net/ghttp"
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"github.com/gogf/gf/v2/util/gconv"
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)
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// GlobalLimiter 全局限流中间件（使用Redis分布式控制）
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func GlobalLimiter(r *ghttp.Request) {
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// 从配置文件读取全局限流参数
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globalLimit := g.Cfg().MustGet(r.GetCtx(), "rate.limit", 800).Int64()
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key := redis.RateLimitKeyGlobal
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// 使用Redis计数器进行全局限流
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count, err := redis.IncrRateLimit(r.GetCtx(), key, 1) // 1秒窗口
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if err != nil {
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g.Log().Errorf(r.GetCtx(), "全局限流Redis错误: %v", err)
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r.Middleware.Next()
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return
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}
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if count > globalLimit {
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g.Log().Warningf(r.GetCtx(), "全局限流触发: count: %d, limit: %d", count, globalLimit)
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r.Response.WriteStatusExit(429, "系统当前繁忙,请稍后再试")
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return
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}
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r.Middleware.Next()
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}
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// IPLimiter IP限流中间件（防DDoS）
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func IPLimiter(r *ghttp.Request) {
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ip := r.GetClientIp()
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key := fmt.Sprintf(redis.RateLimitKeyIP, ip)
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// 从配置文件读取IP限流参数
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ipLimit := g.Cfg().MustGet(r.GetCtx(), "rate.ip.limit", 100).Int64()
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// 使用Redis计数器
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count, err := redis.IncrRateLimit(r.GetCtx(), key, 1) // 1秒窗口
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if err != nil {
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g.Log().Errorf(r.GetCtx(), "IP限流Redis错误: %v", err)
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r.Middleware.Next()
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return
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}
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if count > ipLimit {
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g.Log().Warningf(r.GetCtx(), "IP限流触发: %s, count: %d, limit: %d", ip, count, ipLimit)
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r.Response.WriteStatusExit(429, "请求过于频繁,请稍后再试")
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return
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}
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r.Middleware.Next()
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}
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// UserLimiter 用户维度限流中间件（防止单用户滥用）
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func UserLimiter(r *ghttp.Request) {
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var userName string
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user, err := utils.GetUserInfo(r.GetCtx())
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if err != nil {
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r.Response.WriteStatusExit(429, err.Error())
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return
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}
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userName = gconv.String(user.UserName)
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// 从配置文件读取用户限流参数
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userLimit := g.Cfg().MustGet(r.GetCtx(), "rate.user.limit", 50).Int64()
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key := fmt.Sprintf(redis.RateLimitKeyUser, userName)
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count, err := redis.IncrRateLimit(r.GetCtx(), key, 1)
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if err != nil {
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g.Log().Errorf(r.GetCtx(), "用户限流Redis错误: %v", err)
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return
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}
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if count > userLimit {
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r.Response.WriteStatusExit(429, "您的请求过于频繁,请稍后再试")
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return
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}
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r.Middleware.Next()
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}
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// ServiceLimiter 服务维度限流中间件（保护微服务）
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func ServiceLimiter(r *ghttp.Request) {
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// 从URL路径提取服务名: /customerService/xxx -> customerService
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pathParts := strings.Split(strings.Trim(r.URL.Path, "/"), "/")
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if len(pathParts) == 0 {
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r.Middleware.Next()
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return
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}
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serverName := pathParts[0]
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// 从配置文件读取服务限流参数
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serviceLimitKey := fmt.Sprintf("rate.services.%s.limit", serverName)
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limit := g.Cfg().MustGet(r.GetCtx(), serviceLimitKey, 0).Int64()
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// 如果配置为0，说明该服务没有限流配置，跳过限流
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if limit == 0 {
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r.Middleware.Next()
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return
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}
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key := fmt.Sprintf(redis.RateLimitKeyService, serverName)
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count, err := redis.IncrRateLimit(r.GetCtx(), key, 1)
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if err != nil {
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g.Log().Errorf(r.GetCtx(), "服务限流Redis错误: %v", err)
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r.Middleware.Next()
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return
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}
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if count > limit {
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g.Log().Warningf(r.GetCtx(), "服务限流触发: %s, count: %d, limit: %d", serverName, count, limit)
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r.Response.WriteStatusExit(429, fmt.Sprintf("服务 '%s' 当前繁忙,请稍后再试", serverName))
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return
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}
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r.Middleware.Next()
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}
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