配置文件从consul的配置中读取，监听配置文件改变的状态

consul/consul.go

@@ -13,7 +13,11 @@ import (
 	"github.com/gogf/gf/v2/frame/g"
 	"github.com/gogf/gf/v2/net/gsel"
 	"github.com/gogf/gf/v2/net/gsvc"
+	"github.com/gogf/gf/v2/os/gcfg"
+	"github.com/gogf/gf/v2/os/genv"
 	"github.com/gogf/gf/v2/util/grand"
+	"github.com/hashicorp/consul/api"
+	"github.com/r3labs/diff/v2"
 )
 
 var (
@@ -135,7 +139,165 @@ func init() {
 		// 连接成功后启动健康检查和自动重连
 		go startHealthCheckAndReconnect()
 	}
+
+	loadConfigFromConsul()
 }
+
+func loadConfigFromConsul() {
+	ctx := context.Background()
+
+	serviceName := g.Cfg().MustGet(ctx, "server.name", "admin-go").String()
+	env := genv.Get("APP_ENV", "").String()
+	fmt.Printf("服务名称: %s, 环境变量 APP_ENV: %s\n", serviceName, env)
+
+	if env == "" {
+		fmt.Printf("未设置 APP_ENV 环境变量，跳过 Consul 配置加载\n")
+		return
+	}
+
+	consulData, lastIndex, err := loadEnvFromConsul(env, serviceName)
+	if err == nil && len(consulData) > 0 {
+		adapter, err := gcfg.NewAdapterContent()
+		if err != nil {
+			fmt.Printf("创建配置适配器失败: %v\n", err)
+			return
+		}
+		adapter.SetContent(string(consulData))
+		g.Cfg().SetAdapter(adapter)
+
+		fmt.Printf("已从 Consul 成功加载初始配置\n")
+
+		go watchConsulConfig(env, serviceName, lastIndex)
+	} else {
+		fmt.Printf("从 Consul 获取配置失败，使用本地配置文件\n")
+	}
+}
+
+func loadEnvFromConsul(env string, serviceName string) ([]byte, uint64, error) {
+	ctx := context.Background()
+
+	consulAddress := g.Cfg().MustGet(ctx, "consul.address", "127.0.0.1:8500").String()
+	fmt.Printf("Consul 地址: %s\n", consulAddress)
+
+	config := api.DefaultConfig()
+	config.Address = consulAddress
+
+	client, err := api.NewClient(config)
+	if err != nil {
+		fmt.Printf("创建 Consul 客户端失败: %v\n", err)
+		return nil, 0, err
+	}
+	consulKey := fmt.Sprintf("config/%s/%s-%s", serviceName, serviceName, env)
+	fmt.Printf("从 Consul 读取配置键: %s\n", consulKey)
+
+	kv := client.KV()
+
+	opts := &api.QueryOptions{
+		WaitIndex: 0,
+		WaitTime:  60 * time.Second,
+	}
+
+	pair, meta, err := kv.Get(consulKey, opts)
+	if err != nil {
+		fmt.Printf("从 Consul 读取配置失败: %v\n", err)
+		return nil, 0, err
+	}
+
+	if pair == nil {
+		fmt.Printf("Consul 中未找到配置键: %s\n", consulKey)
+		return nil, 0, nil
+	}
+
+	fmt.Printf("已从 Consul 加载配置, Index: %d\n", meta.LastIndex)
+	return pair.Value, meta.LastIndex, nil
+}
+
+func watchConsulConfig(env string, serviceName string, lastIndex uint64) {
+	ctx := context.Background()
+
+	consulAddress := g.Cfg().MustGet(ctx, "consul.address", "127.0.0.1:8500").String()
+	config := api.DefaultConfig()
+	config.Address = consulAddress
+
+	client, err := api.NewClient(config)
+	if err != nil {
+		fmt.Printf("创建 Consul 监听客户端失败: %v\n", err)
+		return
+	}
+
+	consulKey := fmt.Sprintf("config/%s/%s-%s", serviceName, serviceName, env)
+
+	for {
+		opts := &api.QueryOptions{
+			WaitIndex: lastIndex,
+			WaitTime:  60 * time.Second,
+		}
+
+		pair, meta, err := client.KV().Get(consulKey, opts)
+		if err != nil {
+			fmt.Printf("Consul 监听出错: %v, 5秒后重试...\n", err)
+			time.Sleep(5 * time.Second)
+			continue
+		}
+
+		if meta.LastIndex == lastIndex {
+			continue
+		}
+
+		if pair == nil {
+			fmt.Printf("Consul 配置被删除: %s\n", consulKey)
+			lastIndex = meta.LastIndex
+			continue
+		}
+
+		fmt.Printf("检测到 Consul 配置变更: %s, New Index: %d\n", consulKey, meta.LastIndex)
+
+		updateLocalConfig(pair.Value)
+
+		lastIndex = meta.LastIndex
+	}
+}
+
+func updateLocalConfig(content []byte) {
+	ctx := context.Background()
+
+	oldConfig, _ := g.Cfg().Data(ctx)
+
+	adapter, err := gcfg.NewAdapterContent()
+	if err != nil {
+		fmt.Printf("创建新配置适配器失败: %v\n", err)
+		return
+	}
+	adapter.SetContent(string(content))
+	g.Cfg().SetAdapter(adapter)
+
+	newConfig, _ := g.Cfg().Data(ctx)
+
+	changelog, err := diff.Diff(oldConfig, newConfig)
+	if err != nil {
+		fmt.Printf("配置对比失败: %v\n", err)
+		return
+	}
+
+	if len(changelog) == 0 {
+		fmt.Printf("配置已热更新成功（内容无实质变化）\n")
+		return
+	}
+
+	fmt.Printf("=== 检测到配置变更 (%d 项) ===\n", len(changelog))
+	for _, change := range changelog {
+		switch change.Type {
+		case "create":
+			fmt.Printf("[+] 新增: %s = %v\n", change.Path, change.To)
+		case "update":
+			fmt.Printf("[~] 修改: %s: %v -> %v\n", change.Path, change.From, change.To)
+		case "delete":
+			fmt.Printf("[-] 删除: %s (原值: %v)\n", change.Path, change.From)
+		}
+	}
+	fmt.Printf("=================================\n")
+}
+
 func getLocalIP() (string, error) {
 	// 获取本机所有网络接口
 	addrs, err := net.InterfaceAddrs()