feat: 初次启动

app/gateway/gateway.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net/http"
+
+	"sundynix-micro-go/app/gateway/internal/config"
+	"sundynix-micro-go/app/gateway/internal/handler"
+	"sundynix-micro-go/app/gateway/internal/middleware"
+
+	"github.com/zeromicro/go-zero/core/conf"
+	"github.com/zeromicro/go-zero/core/logx"
+)
+
+var configFile = flag.String("f", "etc/gateway.yaml", "the config file")
+
+func main() {
+	flag.Parse()
+
+	var c config.Config
+	conf.MustLoad(*configFile, &c)
+
+	// 构建反向代理路由器
+	proxyRouter := handler.NewProxyRouter(c.Upstreams)
+
+	// 构建请求处理链
+	var finalHandler http.Handler = proxyRouter
+
+	// 注入 CORS 中间件
+	if c.Cors.Enable {
+		corsMiddleware := middleware.NewCorsMiddleware(c.Cors.AllowOrigins, c.Cors.AllowMethods, c.Cors.AllowHeaders)
+		finalHandler = http.HandlerFunc(corsMiddleware.Handle(func(w http.ResponseWriter, r *http.Request) {
+			proxyRouter.ServeHTTP(w, r)
+		}))
+	}
+
+	// 健康检查
+	mux := http.NewServeMux()
+	mux.HandleFunc("/health", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json; charset=utf-8")
+		fmt.Fprintf(w, `{"code":200,"msg":"gateway is healthy","upstreams":%d}`, len(c.Upstreams))
+	})
+	mux.Handle("/", finalHandler)
+
+	addr := fmt.Sprintf("%s:%d", c.Host, c.Port)
+	logx.Infof("===== Sundynix Gateway 启动 =====")
+	logx.Infof("监听地址: %s", addr)
+	logx.Infof("路由数量: %d", len(c.Upstreams))
+	for _, u := range c.Upstreams {
+		logx.Infof("  %s -> %s", u.Prefix, u.Target)
+	}
+	logx.Infof("================================")
+
+	if err := http.ListenAndServe(addr, mux); err != nil {
+		logx.Errorf("网关启动失败: %v", err)
+	}
+}