zzy
a3033bbf67
- 新增递归删除目录及子项的功能，支持 recursive 和 force 操作模式 - 支持通过路径获取文件或目录内容，并完善参数说明和示例 - 完善 VFS API 文档，包括操作模式、权限描述和响应内容 - 优化 GetVFSNode 方法，改为通过 ID 查询节点信息 - 修复部分路径和权限检查的逻辑注释
579 lines
14 KiB
Go
579 lines
14 KiB
Go
// vfs.go
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package models
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import (
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"crypto/rand"
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"database/sql"
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"errors"
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"fmt"
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"path"
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"strings"
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"time"
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_ "github.com/mattn/go-sqlite3"
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)
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type Vfs struct {
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DB *sql.DB
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}
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type VfsNodeType int
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const (
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VfsNodeTypeFile VfsNodeType = iota
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VfsNodeTypeService
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VfsNodeTypeDirectory
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VfsNodeTypeSymlink
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)
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type VfsNode struct {
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ID uint64
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Name string
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ParentID uint64
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Type VfsNodeType
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CreatedAt time.Time
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UpdatedAt time.Time
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}
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type VfsUser struct {
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Name string
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Token string
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}
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type VfsDirEntry struct {
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ID uint64
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Name string
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Type VfsNodeType
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}
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// NewVfs 创建新的 VFS 实例
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func NewVfs(dbPath string) (*Vfs, error) {
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db, err := sql.Open("sqlite3", dbPath)
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if err != nil {
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return nil, err
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}
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_, err = db.Exec(`
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CREATE TABLE IF NOT EXISTS vfs_nodes (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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name TEXT NOT NULL,
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parent_id INTEGER,
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type INTEGER NOT NULL,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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UNIQUE(parent_id, name)
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)`)
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if err != nil {
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return nil, err
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}
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_, err = db.Exec(`
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CREATE TABLE IF NOT EXISTS vfs_users (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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name TEXT NOT NULL UNIQUE,
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token TEXT NOT NULL UNIQUE,
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created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
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)`)
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if err != nil {
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return nil, err
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}
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err = createInitialDirectories(db)
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if err != nil {
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return nil, err
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}
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return &Vfs{DB: db}, nil
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}
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// 创建初始目录结构
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func createInitialDirectories(db *sql.DB) error {
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var err error
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// 创建 /home 目录
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_, err = db.Exec(`
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INSERT OR IGNORE INTO vfs_nodes (name, parent_id, type, created_at, updated_at)
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VALUES ('home', 0, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)`,
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VfsNodeTypeDirectory)
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if err != nil {
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return err
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}
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// 创建 /public 目录
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_, err = db.Exec(`
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INSERT OR IGNORE INTO vfs_nodes (name, parent_id, type, created_at, updated_at)
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VALUES ('public', 0, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)`,
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VfsNodeTypeDirectory)
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if err != nil {
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return err
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}
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return nil
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}
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func generateToken() string {
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bytes := make([]byte, 16)
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if _, err := rand.Read(bytes); err != nil {
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// fallback to time-based token
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return fmt.Sprintf("%x", time.Now().UnixNano())
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}
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return fmt.Sprintf("%x", bytes)
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}
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// 添加用户相关操作
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func (v *Vfs) CreateUser(username string) (string, error) {
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// 生成随机token
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token := generateToken()
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// 检查用户是否已存在
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_, err := v.GetUserByName(username)
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if err == nil {
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return "", errors.New("user already exists")
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}
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// 插入用户（不使用事务）
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_, err = v.DB.Exec("INSERT INTO vfs_users (name, token) VALUES (?, ?)", username, token)
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if err != nil {
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return "", err
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}
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// 使用 defer 确保出错时能清理已创建的用户
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defer func() {
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if err != nil {
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v.DB.Exec("DELETE FROM vfs_users WHERE name = ? AND token = ?", username, token)
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}
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}()
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// 确保 /home 目录存在
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homeDir, getHomeErr := v.GetNodeByPath("/home/")
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if getHomeErr != nil {
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// 如果 /home 不存在，创建它
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homeDir = &VfsNode{
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Name: "home",
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ParentID: 0,
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Type: VfsNodeTypeDirectory,
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}
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if createHomeErr := v.CreateVFSNode(homeDir); createHomeErr != nil {
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err = createHomeErr
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return "", err
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}
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}
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// 创建用户目录 /home/username
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userDir := &VfsNode{
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Name: username,
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ParentID: homeDir.ID,
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Type: VfsNodeTypeDirectory,
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CreatedAt: time.Now(),
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UpdatedAt: time.Now(),
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}
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if createDirErr := v.CreateVFSNode(userDir); createDirErr != nil {
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err = createDirErr
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return "", err
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}
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return token, nil
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}
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func (v *Vfs) DeleteUser(username string) error {
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// TODO: 递归删除用户相关文件
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// 这里暂时只删除用户记录
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_, err := v.DB.Exec("DELETE FROM vfs_users WHERE name = ?", username)
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return err
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}
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func (v *Vfs) GetUserByToken(token string) (*VfsUser, error) {
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user := &VfsUser{}
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err := v.DB.QueryRow("SELECT name, token FROM vfs_users WHERE token = ?", token).
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Scan(&user.Name, &user.Token)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, errors.New("user not found")
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}
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return nil, err
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}
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return user, nil
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}
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func (v *Vfs) GetUserByName(username string) (*VfsUser, error) {
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user := &VfsUser{}
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err := v.DB.QueryRow("SELECT name, token FROM vfs_users WHERE name = ?", username).
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Scan(&user.Name, &user.Token)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, errors.New("user not found")
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}
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return nil, err
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}
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return user, nil
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}
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// GetChildrenID 获取目录下所有子项的 ID
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func (v *Vfs) GetChildren(parentID uint64) ([]VfsDirEntry, error) {
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rows, err := v.DB.Query("SELECT id, name, type FROM vfs_nodes WHERE parent_id = ?", parentID)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var dirEntrys []VfsDirEntry
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for rows.Next() {
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var entry VfsDirEntry
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if err := rows.Scan(&entry.ID, &entry.Name, &entry.Type); err != nil {
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return nil, err
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}
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dirEntrys = append(dirEntrys, entry)
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}
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return dirEntrys, nil
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}
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func (v *Vfs) GetChildrenID(parentID uint64, recursive bool) (ids []uint64, services []uint64, err error) {
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if recursive {
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// 递归获取所有子项ID
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err := v.getChildrenIDRecursive(parentID, &ids, &services)
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if err != nil {
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return nil, nil, err
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}
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} else {
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// 只获取直接子项ID
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rows, err := v.DB.Query("SELECT id FROM vfs_nodes WHERE parent_id = ?", parentID)
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if err != nil {
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return nil, nil, err
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}
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defer rows.Close()
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for rows.Next() {
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var id uint64
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if err := rows.Scan(&id); err != nil {
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return nil, nil, err
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}
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ids = append(ids, id)
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}
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}
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return ids, services, nil
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}
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// DeleteNodeRecursively 递归删除节点及其所有子项
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func (v *Vfs) DeleteNodeRecursively(nodeID uint64) ([]uint64, error) {
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// 获取所有需要删除的ID（包括自己和所有子项）
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idsToDelete := []uint64{nodeID}
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// 获取所有子项ID
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childIDs, sericeIDs, err := v.GetChildrenID(nodeID, true)
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if err != nil {
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return nil, err
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}
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idsToDelete = append(idsToDelete, childIDs...)
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// 构建删除语句
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if len(idsToDelete) == 0 {
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return nil, nil
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}
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// 创建占位符
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placeholders := make([]string, len(idsToDelete))
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args := make([]any, len(idsToDelete))
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for i, id := range idsToDelete {
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placeholders[i] = "?"
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args[i] = id
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}
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query := fmt.Sprintf("DELETE FROM vfs_nodes WHERE id IN (%s)", strings.Join(placeholders, ","))
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_, err = v.DB.Exec(query, args...)
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return sericeIDs, err
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}
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// getChildrenIDRecursive 递归获取所有子项ID的辅助函数
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func (v *Vfs) getChildrenIDRecursive(parentID uint64, ids *[]uint64, services *[]uint64) error {
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// 获取当前层级的子项
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rows, err := v.DB.Query("SELECT id, type FROM vfs_nodes WHERE parent_id = ?", parentID)
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if err != nil {
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return err
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}
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defer rows.Close()
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for rows.Next() {
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var id uint64
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var nodeType VfsNodeType
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if err := rows.Scan(&id, &nodeType); err != nil {
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return err
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}
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// 将当前节点ID添加到列表中
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*ids = append(*ids, id)
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// 如果是目录，递归获取其子项
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switch nodeType {
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case VfsNodeTypeDirectory:
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err := v.getChildrenIDRecursive(id, ids, services)
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if err != nil {
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return err
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}
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case VfsNodeTypeService:
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*services = append(*services, id)
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}
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}
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return nil
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}
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// GetParentID 根据父路径查找父节点 ID
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// parentPath 应该是 ParsePathComponents 的第一个返回值
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func (v *Vfs) GetParentID(parentPath string) (uint64, error) {
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// 根目录特殊处理
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if parentPath == "/" || parentPath == "" {
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return 0, nil
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}
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// 递归查找父路径ID
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// 先解析父路径的父路径和节点名
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grandParentPath, parentName, _, err := ParsePathComponents(parentPath)
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if err != nil {
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return 0, err
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}
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// 递归获取祖父节点ID
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grandParentID, err := v.GetParentID(grandParentPath)
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if err != nil {
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return 0, err
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}
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// 在祖父节点下查找父节点
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var parentID uint64
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err = v.DB.QueryRow("SELECT id FROM vfs_nodes WHERE parent_id = ? AND name = ?",
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grandParentID, parentName).Scan(&parentID)
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if err != nil {
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if err == sql.ErrNoRows {
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return 0, errors.New("parent path not found")
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}
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return 0, err
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}
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return parentID, nil
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}
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// GetNodeByPath 根据完整路径查找节点
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func (v *Vfs) GetNodeByPath(fullPath string) (*VfsNode, error) {
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// 根目录特殊处理
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if path.Clean(fullPath) == "/" {
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return &VfsNode{
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ID: 0,
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Name: "/",
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ParentID: 0,
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Type: VfsNodeTypeDirectory,
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CreatedAt: time.Now(),
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UpdatedAt: time.Now(),
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}, nil
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}
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// 使用 ParsePathComponents 解析路径
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parentPath, nodeName, nodeType, err := ParsePathComponents(fullPath)
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if err != nil {
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return nil, err
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}
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// 获取父节点ID
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parentID, err := v.GetParentID(parentPath)
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if err != nil {
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return nil, err
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}
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// 根据 parentID, nodeName, nodeType 查找或创建节点
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node, err := v.GetNodeByParentIDAndName(parentID, nodeName)
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if err != nil {
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// 如果节点不存在，可以选择创建它或者返回错误
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// 这里根据你的需求决定是返回错误还是创建节点
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return nil, err
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}
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if node.Type != nodeType {
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return nil, errors.New("node type mismatch")
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}
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return node, nil
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}
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// GetNodeByParentIDAndName 根据父ID和名称查找节点
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func (v *Vfs) GetNodeByParentIDAndName(parentID uint64, name string) (*VfsNode, error) {
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node := &VfsNode{}
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err := v.DB.QueryRow(`
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SELECT id, name, parent_id, type, created_at, updated_at
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FROM vfs_nodes
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WHERE parent_id = ? AND name = ?`, parentID, name).Scan(
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&node.ID, &node.Name, &node.ParentID, &node.Type, &node.CreatedAt, &node.UpdatedAt)
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if err != nil {
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if err == sql.ErrNoRows {
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return nil, errors.New("node not found")
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}
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return nil, err
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}
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return node, nil
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}
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// CreateNodeByComponents 根据路径组件创建节点
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func (v *Vfs) CreateNodeByComponents(parentPath, nodeName string, nodeType VfsNodeType) (*VfsNode, error) {
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// 获取父节点ID
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parentID, err := v.GetParentID(parentPath)
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if err != nil {
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return nil, err
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}
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// 创建新节点
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node := &VfsNode{
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Name: nodeName,
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ParentID: parentID,
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Type: nodeType,
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CreatedAt: time.Now(),
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UpdatedAt: time.Now(),
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}
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// 保存到数据库
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result, err := v.DB.Exec(`
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INSERT INTO vfs_nodes (name, parent_id, type, created_at, updated_at)
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VALUES (?, ?, ?, ?, ?)`,
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node.Name, node.ParentID, node.Type, node.CreatedAt, node.UpdatedAt)
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if err != nil {
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return nil, err
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}
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// 获取插入的ID
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id, err := result.LastInsertId()
|
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if err != nil {
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return nil, err
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}
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node.ID = uint64(id)
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return node, nil
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}
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func ParsePathComponents(pathStr string) (parentPath, nodeName string, nodeType VfsNodeType, err error) {
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// FIXME: 路径判断以及update的类型判断
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abspath := path.Clean(pathStr)
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if !path.IsAbs(abspath) {
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return "", "", 0, errors.New("path must be absolute")
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}
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// 特殊处理根路径
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if abspath == "/" {
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return "", "", VfsNodeTypeDirectory, nil
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}
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// 判断是文件还是目录
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nodeType = VfsNodeTypeFile
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// 如果原始路径以 / 结尾，则为目录
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if len(pathStr) > 1 && pathStr[len(pathStr)-1] == '/' {
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nodeType = VfsNodeTypeDirectory
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}
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if nodeType == VfsNodeTypeFile && path.Ext(pathStr) == ".api" {
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nodeType = VfsNodeTypeService
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}
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// 分割路径
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parentPath, nodeName = path.Split(abspath)
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// 清理父路径
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if parentPath != "/" && parentPath != "" {
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parentPath = path.Clean(parentPath)
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}
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// 处理特殊情况
|
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if parentPath == "." {
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||
parentPath = "/"
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}
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return parentPath, nodeName, nodeType, nil
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}
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||
|
||
// MoveToPath 将节点移动到指定路径
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||
func (v *Vfs) MoveToPath(node *VfsNode, destPath string) error {
|
||
// FIXME: 路径和权限的检查
|
||
// 1. 解析目标路径
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parentPath, nodeName, _, err := ParsePathComponents(destPath)
|
||
if err != nil {
|
||
return fmt.Errorf("invalid destination path: %w", err)
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||
}
|
||
|
||
// 2. 查找目标父节点
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||
parentID, err := v.GetParentID(parentPath)
|
||
if err != nil {
|
||
return fmt.Errorf("failed to find parent directory '%s': %w", parentPath, err)
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||
}
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||
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||
// 3. 检查目标位置是否已存在同名节点
|
||
_, err = v.GetNodeByParentIDAndName(parentID, nodeName)
|
||
if err == nil {
|
||
return fmt.Errorf("destination path '%s' already exists", destPath)
|
||
}
|
||
if err.Error() != "node not found" {
|
||
return fmt.Errorf("error checking destination path: %w", err)
|
||
}
|
||
|
||
// 4. 更新节点的父节点ID和名称
|
||
node.ParentID = parentID
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||
node.Name = nodeName
|
||
node.UpdatedAt = time.Now()
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||
|
||
// 5. 更新数据库中的节点信息
|
||
_, err = v.DB.Exec(`
|
||
UPDATE vfs_nodes
|
||
SET name = ?, parent_id = ?, updated_at = ?
|
||
WHERE id = ?`,
|
||
node.Name, node.ParentID, node.UpdatedAt, node.ID)
|
||
if err != nil {
|
||
return fmt.Errorf("failed to update node: %w", err)
|
||
}
|
||
|
||
return nil
|
||
}
|
||
|
||
func (v *Vfs) CheckNameValid(name string) error {
|
||
if name == "" || strings.Contains(name, "/") {
|
||
return fmt.Errorf("invalid node name")
|
||
}
|
||
return nil
|
||
}
|
||
|
||
func (v *Vfs) CreateVFSNode(p *VfsNode) error {
|
||
_, err := v.DB.Exec(`
|
||
INSERT INTO vfs_nodes (name, parent_id, type, created_at, updated_at)
|
||
VALUES (?, ?, ?, ?, ?)`,
|
||
p.Name, p.ParentID, p.Type, time.Now(), time.Now())
|
||
return err
|
||
}
|
||
|
||
func (v *Vfs) DeleteVFSNode(p *VfsNode) error {
|
||
_, err := v.DB.Exec("DELETE FROM vfs_nodes WHERE id = ?", p.ID)
|
||
return err
|
||
}
|
||
|
||
func (v *Vfs) GetVFSNode(ID uint64) *VfsNode {
|
||
node := &VfsNode{}
|
||
err := v.DB.QueryRow(`
|
||
SELECT id, name, parent_id, type, created_at, updated_at
|
||
FROM vfs_nodes
|
||
WHERE id = ?`, ID).Scan(
|
||
&node.ID, &node.Name, &node.ParentID, &node.Type, &node.CreatedAt, &node.UpdatedAt)
|
||
|
||
if err != nil {
|
||
return nil
|
||
}
|
||
|
||
return node
|
||
}
|
||
|
||
func (v *Vfs) UpdateVFSNode(p *VfsNode) error {
|
||
_, err := v.DB.Exec(`
|
||
UPDATE vfs_nodes
|
||
SET name = ?, parent_id = ?, type = ?, updated_at = ?
|
||
WHERE id = ?`,
|
||
p.Name, p.ParentID, p.Type, time.Now(), p.ID)
|
||
return err
|
||
}
|