Go微服务网关设计与实现从路由转发到限流熔断文章导语API网关是微服务架构的入口承担着路由转发、认证鉴权、限流熔断、日志监控等职责。本文基于Go构建一个轻量级API网关覆盖核心功能的实现。一、反向代理核心funcNewGateway(config GatewayConfig)*Gateway{returnGateway{routes:config.Routes,limiter:rate.NewLimiter(rate.Limit(config.RateLimit),config.Burst),proxy:httputil.ReverseProxy{Director:func(req*http.Request){// 动态路由target:resolveTarget(req)req.URL.Schemehttpreq.URL.Hosttarget},},}}funcresolveTarget(req*http.Request)string{path:req.URL.Pathifstrings.HasPrefix(path,/api/users){returnuser-service:8080}ifstrings.HasPrefix(path,/api/orders){returnorder-service:8081}returndefault-service:8080}二、限流实现funcRateLimitMiddleware(limiter*rate.Limiter)gin.HandlerFunc{returnfunc(c*gin.Context){if!limiter.Allow(){c.JSON(429,gin.H{msg:Too Many Requests})c.Abort()return}c.Next()}}三、全文总结反向代理实现请求转发令牌桶限流保护后端服务JWT鉴权在网关层统一处理请求日志记录所有经过的请求参考文献Go net/http/httputil.ReverseProxyGolang rate包文档Netflix Zuul架构设计
