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/nginx/manager.go

@@ -0,0 +1,99 @@
+package nginx
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"os/exec"
+	"path/filepath"
+)
+
+type Executor interface {
+	Test(ctx context.Context) error
+	Reload(ctx context.Context) error
+}
+
+type ShellExecutor struct {
+	Binary string
+}
+
+func (e *ShellExecutor) Test(ctx context.Context) error {
+	cmd := exec.CommandContext(ctx, e.Binary, "-t")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("nginx -t failed: %w: %s", err, string(output))
+	}
+	return nil
+}
+
+func (e *ShellExecutor) Reload(ctx context.Context) error {
+	cmd := exec.CommandContext(ctx, e.Binary, "-s", "reload")
+	output, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("nginx reload failed: %w: %s", err, string(output))
+	}
+	return nil
+}
+
+type Manager struct {
+	RouteConfigPath string
+	Executor        Executor
+}
+
+func (m *Manager) Apply(ctx context.Context, content string) error {
+	backupPath, hadExisting, err := m.backup()
+	if err != nil {
+		return err
+	}
+	if err = os.WriteFile(m.RouteConfigPath, []byte(content), 0o644); err != nil {
+		return err
+	}
+	if err = m.Executor.Test(ctx); err != nil {
+		_ = m.restore(backupPath, hadExisting)
+		return err
+	}
+	if err = m.Executor.Reload(ctx); err != nil {
+		_ = m.restore(backupPath, hadExisting)
+		return err
+	}
+	if backupPath != "" {
+		_ = os.Remove(backupPath)
+	}
+	return nil
+}
+
+func (m *Manager) backup() (string, bool, error) {
+	if m.RouteConfigPath == "" {
+		return "", false, errors.New("route config path 不能为空")
+	}
+	if err := os.MkdirAll(filepath.Dir(m.RouteConfigPath), 0o755); err != nil {
+		return "", false, err
+	}
+	data, err := os.ReadFile(m.RouteConfigPath)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return "", false, nil
+		}
+		return "", false, err
+	}
+	backupPath := m.RouteConfigPath + ".bak"
+	if err = os.WriteFile(backupPath, data, 0o644); err != nil {
+		return "", false, err
+	}
+	return backupPath, true, nil
+}
+
+func (m *Manager) restore(backupPath string, hadExisting bool) error {
+	if hadExisting {
+		data, err := os.ReadFile(backupPath)
+		if err != nil {
+			return err
+		}
+		return os.WriteFile(m.RouteConfigPath, data, 0o644)
+	}
+	if err := os.Remove(m.RouteConfigPath); err != nil && !os.IsNotExist(err) {
+		return err
+	}
+	return nil
+}