4f539b50dd
main.go 新增 exams/homework/grades 三组路由(无尾斜杠+通配符) config.go 新增 CoreEduServiceURL 字段默认 localhost:3004 删除死代码 internal/routing/routing.go(从未被 main 引用) 验证: GET /exams/class/:id 200, POST /exams 201, 链路全通
125 lines
3.8 KiB
Go
125 lines
3.8 KiB
Go
package main
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import (
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"context"
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"log"
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"net/http"
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"os"
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"os/signal"
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"syscall"
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"time"
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"github.com/edu-cloud/api-gateway/internal/config"
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"github.com/edu-cloud/api-gateway/internal/health"
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"github.com/edu-cloud/api-gateway/internal/middleware"
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"github.com/edu-cloud/api-gateway/internal/proxy"
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"github.com/gin-gonic/gin"
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)
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// maxBodyBytes 请求体大小上限：10MB
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const maxBodyBytes int64 = 10 * 1024 * 1024
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func main() {
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cfg := config.Load()
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gin.SetMode(gin.ReleaseMode)
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r := gin.New()
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// 关闭尾斜杠重定向：避免 Next.js rewrites 代理时 /api/v1/classes → 301 → /api/v1/classes/ 循环
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r.RedirectTrailingSlash = false
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// 全局中间件（按顺序注册）
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// 1. panic 恢复（最外层，捕获后续所有中间件与 handler 的 panic）
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r.Use(middleware.Recovery())
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// 2. 请求 ID 注入
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r.Use(middleware.RequestID())
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// 3. 跨域
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r.Use(middleware.CORS())
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// 4. 安全响应头
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r.Use(middleware.SecurityHeaders())
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// 5. 请求体大小限制
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r.Use(middleware.RequestBodyLimit(maxBodyBytes))
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// 6. 限流（每 IP 100 rps，突发 20）
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r.Use(middleware.RateLimit(100, 20))
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// 健康检查路由（无需鉴权，在 Auth 之前）
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r.GET("/healthz", health.Healthz)
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r.GET("/readyz", health.Readyz)
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// API v1 组：熔断 + 鉴权 + 反向代理
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api := r.Group("/api/v1")
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// 7. 熔断（仅作用于代理路由，下游 5xx 触发）
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api.Use(middleware.CircuitBreaker("downstream"))
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// 8. JWT 鉴权
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api.Use(middleware.AuthMiddleware(cfg))
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{
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// classes 服务路由
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// 注：同时注册无尾斜杠与通配符两条路由。RedirectTrailingSlash=false 时，
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// Gin 不会自动把 /classes 跳到 /classes/，所以两条都要显式注册。
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classesProxy, err := proxy.NewProxy(cfg.ClassesServiceURL)
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if err != nil {
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log.Fatalf("failed to create classes proxy: %v", err)
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}
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classesHandler := proxy.ProxyHandler(classesProxy)
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api.Any("/classes", classesHandler)
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api.Any("/classes/*path", classesHandler)
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// IAM 服务路由（身份与访问管理）
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iamProxy, err := proxy.NewProxy(cfg.IamServiceURL)
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if err != nil {
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log.Fatalf("failed to create iam proxy: %v", err)
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}
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iamHandler := proxy.ProxyHandler(iamProxy)
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api.Any("/iam", iamHandler)
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api.Any("/iam/*path", iamHandler)
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// Teacher BFF 路由（教师聚合层）
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bffProxy, err := proxy.NewProxy(cfg.TeacherBffURL)
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if err != nil {
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log.Fatalf("failed to create teacher-bff proxy: %v", err)
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}
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bffHandler := proxy.ProxyHandler(bffProxy)
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api.Any("/teacher", bffHandler)
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api.Any("/teacher/*path", bffHandler)
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// core-edu 服务路由（考试/作业/成绩）
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// 注：同时注册无尾斜杠与通配符两条路由，与 classes/iam/teacher 一致。
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coreEduProxy, err := proxy.NewProxy(cfg.CoreEduServiceURL)
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if err != nil {
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log.Fatalf("failed to create core-edu proxy: %v", err)
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}
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coreEduHandler := proxy.ProxyHandler(coreEduProxy)
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api.Any("/exams", coreEduHandler)
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api.Any("/exams/*path", coreEduHandler)
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api.Any("/homework", coreEduHandler)
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api.Any("/homework/*path", coreEduHandler)
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api.Any("/grades", coreEduHandler)
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api.Any("/grades/*path", coreEduHandler)
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}
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srv := &http.Server{
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Addr: ":" + cfg.Port,
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Handler: r,
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ReadTimeout: 10 * time.Second,
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WriteTimeout: 30 * time.Second,
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}
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// 优雅关闭
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go func() {
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log.Printf("API Gateway listening on :%s", cfg.Port)
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if err := srv.ListenAndServe(); err != nil && err != http.ErrServerClosed {
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log.Fatalf("listen: %s", err)
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}
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}()
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quit := make(chan os.Signal, 1)
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signal.Notify(quit, syscall.SIGINT, syscall.SIGTERM)
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<-quit
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log.Println("Shutting down API Gateway...")
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ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
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defer cancel()
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if err := srv.Shutdown(ctx); err != nil {
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log.Fatal("Server forced to shutdown:", err)
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}
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log.Println("API Gateway exited")
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}
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