绝尘
6bee55b96f
- SFTP模块：连接/断开/文件CRUD/系统信息采集/base64二进制写入 - 连接池：多服务器同时在线，瞬间切换profile - autoConnect：启动时自动连接所有非本地服务器 - 端口自动回退：listenWithFallback消除TOCTOU，解决端口冲突崩溃 - 文件服务器URL集中管理：file-server.ts消除8+处硬编码端口 - Sidebar设置面板：添加服务器/自动连接/自动刷新开关 - 修复：validateFilePath越界panic、正则预编译 - 修复：注释准确性（RemoveAll/端口8073/动态端口文档）
500 lines
12 KiB
Go
500 lines
12 KiB
Go
package sftp
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import (
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"encoding/base64"
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"fmt"
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"io"
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"io/fs"
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"os"
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"path"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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"u-desk/internal/filesystem"
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sftpclient "github.com/pkg/sftp"
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)
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// Service SFTP 文件操作服务
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type Service struct {
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manager *Manager
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}
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// NewService 创建 SFTP 服务实例
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func NewService() *Service {
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return &Service{manager: GetManager()}
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}
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// GetManager 获取底层连接管理器（供 App 层调用）
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func (s *Service) GetManager() *Manager {
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return s.manager
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}
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// ConnID 从配置生成连接标识符
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func ConnID(host string, port int) string {
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return fmt.Sprintf("%s:%d", host, port)
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}
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// --- 核心文件操作 ---
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func (s *Service) ListDir(connID string, dirPath string) ([]map[string]interface{}, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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var entries []fs.FileInfo
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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var e error
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entries, e = sc.ReadDir(dirPath)
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return e
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})
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if err != nil {
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return nil, fmt.Errorf("读取目录失败: %w", err)
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}
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result := make([]map[string]interface{}, 0, len(entries))
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for _, info := range entries {
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fullPath := path.Join(dirPath, info.Name())
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result = append(result, map[string]interface{}{
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"name": info.Name(),
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"path": toUnixPath(fullPath),
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"is_dir": info.IsDir(),
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"size": info.Size(),
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"mod_time": info.ModTime().Format("2006-01-02 15:04:05"),
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})
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}
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return result, nil
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}
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func (s *Service) ReadFile(connID string, filePath string) (string, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return "", err
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}
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// 大小限制（与本地模式 ReadFile 的 10MB 上限对齐）
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const maxSize int64 = 10 << 20
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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fi, e := sc.Stat(filePath)
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if e != nil { return e }
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if fi.Size() > maxSize {
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return fmt.Errorf("文件过大 (%s)，超过 %d 限制", filesystem.FormatBytes(fi.Size()), maxSize)
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}
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return nil
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})
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if err != nil {
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return "", err
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}
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var data []byte
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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f, e := sc.Open(filePath)
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if e != nil {
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return e
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}
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defer f.Close()
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data, e = io.ReadAll(f)
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return e
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})
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if err != nil {
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return "", fmt.Errorf("读取文件失败: %w", err)
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}
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return string(data), nil
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}
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func (s *Service) WriteFile(connID string, filePath string, content string) error {
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c, err := s.getClient(connID)
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if err != nil {
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return err
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}
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return c.WithRetry(func(sc *sftpclient.Client) error {
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f, e := sc.Create(filePath)
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if e != nil {
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return fmt.Errorf("创建文件失败: %w", e)
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}
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defer f.Close()
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_, e = f.Write([]byte(content))
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return e
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})
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}
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// WriteBase64File 将 base64 编码的二进制内容写入远程文件（用于粘贴图片等场景）
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func (s *Service) WriteBase64File(connID string, filePath string, base64Content string) error {
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c, err := s.getClient(connID)
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if err != nil {
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return err
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}
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data, err := base64.StdEncoding.DecodeString(base64Content)
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if err != nil {
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return fmt.Errorf("base64 解码失败: %w", err)
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}
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return c.WithRetry(func(sc *sftpclient.Client) error {
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f, e := sc.Create(filePath)
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if e != nil {
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return fmt.Errorf("创建文件失败: %w", e)
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}
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defer f.Close()
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_, e = f.Write(data)
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return e
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})
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}
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func (s *Service) GetFileInfo(connID string, filePath string) (map[string]interface{}, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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var info fs.FileInfo
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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var e error
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info, e = sc.Stat(filePath)
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return e
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})
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if err != nil {
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return nil, fmt.Errorf("获取文件信息失败: %w", err)
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}
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return map[string]interface{}{
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"name": info.Name(),
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"path": toUnixPath(filePath),
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"size": info.Size(),
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"size_str": filesystem.FormatBytes(info.Size()),
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"is_dir": info.IsDir(),
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"mod_time": info.ModTime().Format("2006-01-02 15:04:05"),
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"mode": info.Mode().String(),
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}, nil
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}
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func (s *Service) CreateDir(connID string, dirPath string) (*filesystem.FileOperationResult, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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return sc.MkdirAll(dirPath)
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})
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if err != nil {
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return nil, fmt.Errorf("创建目录失败: %w", err)
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}
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infoMap, _ := s.GetFileInfo(connID, dirPath)
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return toFileOperationResult(infoMap, true), nil
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}
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func (s *Service) CreateFile(connID string, filePath string) (*filesystem.FileOperationResult, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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f, e := sc.Create(filePath)
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if e != nil {
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return e
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}
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return f.Close()
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})
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if err != nil {
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return nil, fmt.Errorf("创建文件失败: %w", err)
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}
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infoMap, _ := s.GetFileInfo(connID, filePath)
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return toFileOperationResult(infoMap, false), nil
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}
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func (s *Service) DeletePath(connID string, filePath string) (*filesystem.FileOperationResult, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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infoMap, _ := s.GetFileInfo(connID, filePath)
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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fi, e := sc.Stat(filePath)
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if e != nil {
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return e
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}
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if fi.IsDir() {
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// 递归删除目录
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return sc.RemoveAll(filePath)
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}
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return sc.Remove(filePath)
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})
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if err != nil {
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return nil, fmt.Errorf("删除失败: %w", err)
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}
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result := toFileOperationResult(infoMap, false)
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result.Deleted = true
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return result, nil
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}
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func (s *Service) RenamePath(connID string, oldPath, newPath string) (*filesystem.FileOperationResult, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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return sc.Rename(oldPath, newPath)
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})
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if err != nil {
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return nil, fmt.Errorf("重命名失败: %w", err)
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}
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infoMap, _ := s.GetFileInfo(connID, newPath)
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result := toFileOperationResult(infoMap, false)
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result.OldPath = oldPath
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return result, nil
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}
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// DownloadToTemp 下载远程文件到本地临时目录（用于预览）
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func (s *Service) DownloadToTemp(connID string, remotePath string) (string, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return "", err
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}
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// 预览文件大小上限 50MB（比编辑模式宽松）
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const maxPreviewSize int64 = 50 << 20
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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fi, e := sc.Stat(remotePath)
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if e != nil { return e }
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if fi.Size() > maxPreviewSize {
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return fmt.Errorf("预览文件过大: %s", filesystem.FormatBytes(fi.Size()))
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}
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return nil
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})
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if err != nil {
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return "", err
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}
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tmpDir := os.TempDir()
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// 用时间戳+随机数避免同名文件覆盖
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localPath := filepath.Join(tmpDir, fmt.Sprintf("udesk-sftp-preview-%d-%s", time.Now().UnixNano(), filepath.Base(remotePath)))
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err = c.WithRetry(func(sc *sftpclient.Client) error {
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src, e := sc.Open(remotePath)
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if e != nil {
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return e
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}
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defer src.Close()
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dst, e := os.Create(localPath)
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if e != nil {
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return e
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}
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defer dst.Close()
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_, e = io.Copy(dst, src)
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return e
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})
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if err != nil {
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return "", fmt.Errorf("下载文件失败: %w", err)
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}
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return localPath, nil
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}
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// GetCommonPaths 返回 SFTP 远程主机常用路径
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func (s *Service) GetCommonPaths(connID string) (map[string]string, error) {
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c := s.manager.GetClient(connID)
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username := "root"
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if c != nil {
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c.mu.Lock()
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username = c.config.Username
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c.mu.Unlock()
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}
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home := "/root"
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if username != "root" && username != "" {
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home = fmt.Sprintf("/home/%s", username)
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}
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return map[string]string{
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"home": home,
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"tmp": "/tmp",
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"root": "/",
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}, nil
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}
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// CleanupTempFiles 清理遗留的临时预览文件
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func CleanupTempFiles() {
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tmpDir := os.TempDir()
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entries, err := os.ReadDir(tmpDir)
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if err != nil {
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return
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}
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for _, entry := range entries {
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if strings.HasPrefix(entry.Name(), "udesk-sftp-preview-") {
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os.Remove(filepath.Join(tmpDir, entry.Name()))
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}
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}
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}
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// GetSystemInfo 通过 SSH 命令采集远程系统信息（磁盘/CPU/内存）
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func (s *Service) GetSystemInfo(connID string) (map[string]interface{}, error) {
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c, err := s.getClient(connID)
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if err != nil {
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return nil, err
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}
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type cmdResult struct {
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key string // "df" | "mem" | "cpu"
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output string
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err error
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}
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// 并发执行三条命令（每条独立超时）
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results := make(chan cmdResult, 3)
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cmdTimeout := 6 * time.Second
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runCmd := func(key, cmd string) {
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out, e := c.RunCommand(cmd)
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results <- cmdResult{key, out, e}
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}
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go runCmd("df", "df -B1 / 2>/dev/null | tail -1")
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go runCmd("mem", "free -b 2>/dev/null | grep -E '^Mem:' || cat /proc/meminfo 2>/dev/null | head -2")
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go runCmd("cpu", "top -bn1 | grep 'Cpu(s)' | awk '{print $2}' | cut -d'%' -f1")
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var dfOut, memOut, cpuOut string
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hasErr := false
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for i := 0; i < 3; i++ {
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select {
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case r := <-results:
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switch r.key {
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case "df":
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dfOut = r.output
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case "mem":
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memOut = r.output
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case "cpu":
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cpuOut = r.output
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}
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if r.err != nil {
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hasErr = true
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}
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case <-time.After(cmdTimeout):
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hasErr = true
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}
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}
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info := make(map[string]interface{})
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// 解析 CPU 使用率
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cpuOut = strings.TrimSpace(cpuOut)
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if usage, err := strconv.ParseFloat(cpuOut, 64); err == nil && usage >= 0 {
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info["cpu_usage"] = fmt.Sprintf("%.0f%%", usage)
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}
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// 解析磁盘信息: df -B1 / → Filesystem 1M-blocks Used Available Use% Mounted on
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dfOut = strings.TrimSpace(dfOut)
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if dfFields := strings.Fields(dfOut); len(dfFields) >= 5 {
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var diskTotal, diskUsed uint64
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if v, err := strconv.ParseUint(dfFields[1], 10, 64); err == nil {
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diskTotal = v
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info["disk_total"] = v
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}
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if v, err := strconv.ParseUint(dfFields[2], 10, 64); err == nil {
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diskUsed = v
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info["disk_used"] = v
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}
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if diskTotal > 0 {
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info["disk_usage"] = fmt.Sprintf("%.0f%%", float64(diskUsed)/float64(diskTotal)*100)
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}
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}
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// 解析内存信息: free -b | grep Mem: 或 /proc/meminfo
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memOut = strings.TrimSpace(memOut)
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if strings.Contains(memOut, "MemTotal:") {
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parseProcMeminfo(memOut, info)
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} else if fields := strings.Fields(memOut); len(fields) >= 3 {
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var memTotal, memUsed uint64
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if v, err := strconv.ParseUint(fields[1], 10, 64); err == nil {
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memTotal = v
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info["mem_total"] = v
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}
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if v, err := strconv.ParseUint(fields[2], 10, 64); err == nil {
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memUsed = v
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info["mem_used"] = v
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}
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if memTotal > 0 {
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info["mem_usage"] = fmt.Sprintf("%.0f%%", float64(memUsed)/float64(memTotal)*100)
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}
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}
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if hasErr && len(info) == 0 {
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return nil, fmt.Errorf("采集远程系统信息失败")
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}
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return info, nil
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}
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func parseProcMeminfo(output string, info map[string]interface{}) {
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lines := strings.Split(output, "\n")
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memMap := make(map[string]uint64)
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for _, line := range lines {
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fields := strings.Fields(line)
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if len(fields) >= 2 {
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key := strings.TrimSuffix(fields[0], ":")
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if val, err := strconv.ParseUint(fields[1], 10, 64); err == nil {
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memMap[key] = val
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}
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}
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}
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total := memMap["MemTotal"] * 1024 // kB → bytes
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// 可用内存 ≈ MemAvailable (较新内核) 或 MemFree + Buffers + Cached
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free := memMap["MemFree"]
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if avail, ok := memMap["MemAvailable"]; ok {
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free = avail
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} else {
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free += memMap["Buffers"] + memMap["Cached"]
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}
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used := total - free*1024
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info["mem_total"] = total
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info["mem_used"] = used
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if total > 0 {
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info["mem_usage"] = fmt.Sprintf("%.0f%%", float64(used)/float64(total)*100)
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}
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}
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// --- 内部辅助 ---
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func (s *Service) getClient(connID string) (*Client, error) {
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c := s.manager.GetClient(connID)
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if c == nil {
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return nil, fmt.Errorf("SFTP 连接不存在: %s", connID)
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}
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return c, nil
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}
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func toUnixPath(p string) string {
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return strings.ReplaceAll(p, "\\", "/")
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}
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func toFileOperationResult(m map[string]interface{}, isDir bool) *filesystem.FileOperationResult {
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name, _ := m["name"].(string)
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p, _ := m["path"].(string)
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size, _ := m["size"].(int64)
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modTime, _ := m["mod_time"].(string)
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mode, _ := m["mode"].(string)
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return &filesystem.FileOperationResult{
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Path: p,
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Name: name,
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Size: size,
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SizeStr: filesystem.FormatBytes(size),
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IsDir: isDir,
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ModTime: modTime,
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Mode: mode,
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}
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}
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