实现代理节点功能，包括主程序入口、配置加载、心跳检测和状态管理，添加相关服务和API响应结构

atsf_agent/internal/sync/service.go

@@ -0,0 +1,73 @@
+package sync
+
+import (
+	"context"
+
+	"atsflare-agent/internal/nginx"
+	"atsflare-agent/internal/protocol"
+	"atsflare-agent/internal/state"
+)
+
+const (
+	ApplyResultSuccess = "success"
+	ApplyResultFailed  = "failed"
+)
+
+type ConfigClient interface {
+	GetActiveConfig(ctx context.Context) (*protocol.ActiveConfigResponse, error)
+	ReportApplyLog(ctx context.Context, payload protocol.ApplyLogPayload) error
+}
+
+type Service struct {
+	client       ConfigClient
+	nginxManager *nginx.Manager
+	stateStore   *state.Store
+}
+
+func New(client ConfigClient, nginxManager *nginx.Manager, stateStore *state.Store) *Service {
+	return &Service{
+		client:       client,
+		nginxManager: nginxManager,
+		stateStore:   stateStore,
+	}
+}
+
+func (s *Service) SyncOnce(ctx context.Context) error {
+	snapshot, err := s.stateStore.Load()
+	if err != nil {
+		return err
+	}
+	config, err := s.client.GetActiveConfig(ctx)
+	if err != nil {
+		return err
+	}
+	if snapshot.CurrentVersion == config.Version && snapshot.CurrentChecksum == config.Checksum {
+		return nil
+	}
+	if err = s.nginxManager.Apply(ctx, config.RenderedConfig); err != nil {
+		snapshot.LastError = err.Error()
+		_ = s.stateStore.Save(snapshot)
+		reportErr := s.client.ReportApplyLog(ctx, protocol.ApplyLogPayload{
+			NodeID:  snapshot.NodeID,
+			Version: config.Version,
+			Result:  ApplyResultFailed,
+			Message: err.Error(),
+		})
+		if reportErr != nil {
+			return reportErr
+		}
+		return err
+	}
+	snapshot.CurrentVersion = config.Version
+	snapshot.CurrentChecksum = config.Checksum
+	snapshot.LastError = ""
+	if err = s.stateStore.Save(snapshot); err != nil {
+		return err
+	}
+	return s.client.ReportApplyLog(ctx, protocol.ApplyLogPayload{
+		NodeID:  snapshot.NodeID,
+		Version: config.Version,
+		Result:  ApplyResultSuccess,
+		Message: "apply success",
+	})
+}