151 lines
4.6 KiB
Python
151 lines
4.6 KiB
Python
import hashlib
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import random
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import sqlite3
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# 工具函数：获取文件扩展名
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def GetFileExtension(name: str) -> str:
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parts = name.rsplit('.', 1)
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return parts[1].lower() if len(parts) > 1 else ""
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# 获取 ExtendNameID（基于文件名后缀）
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def GetExtendNameId(name: str, cursor: sqlite3.Cursor) -> int:
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ext = GetFileExtension(name)
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if not ext:
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return 0
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cursor.execute("SELECT ID FROM db_extend_name WHERE ExtendName = ?", (ext,))
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result = cursor.fetchone()
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return result[0] if result else 0
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# 获取 DirLayer（路径层级）
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def GetDirLayer(path: str) -> int:
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# 示例：Z:\demo.jpg → 层级为0；Z:\pictures\RHCE.jpg → 层级为1
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path = path.strip().strip("\\")
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return path.count("\\")
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# 获取 GroupID（默认第一个）
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def GetFirstGroupId(cursor: sqlite3.Cursor) -> int:
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cursor.execute("SELECT ID FROM db_group ORDER BY ID LIMIT 1")
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result = cursor.fetchone()
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return result[0] if result else 0
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# 获取 UserID（默认第一个）
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def GetFirstUserId(cursor: sqlite3.Cursor) -> int:
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cursor.execute("SELECT ID FROM db_user ORDER BY ID LIMIT 1")
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result = cursor.fetchone()
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return result[0] if result else 0
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# 获取设备ID（db_device第一条记录）
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def GetDeviceId(cursor: sqlite3.Cursor) -> int:
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cursor.execute("SELECT ID FROM db_device ORDER BY ID LIMIT 1")
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result = cursor.fetchone()
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return result[0] if result else 0
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# 获取文件大小（伪数据）
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def GetFileSize(full_path: str) -> int:
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return random.randint(100, 999)
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# 获取文件内容哈希（伪数据）
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def GetFileHash(full_path: str) -> str:
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return hashlib.sha256(full_path.encode()).hexdigest()
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# 获取分片数（1~4）
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def GetExtentCount(full_path: str) -> int:
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return random.randint(1, 4)
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# 获取随机位置
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def GetRandomLocation() -> int:
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return random.randint(1000, 9999)
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# 获取随机长度
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def GetRandomLength() -> int:
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return random.randint(1000, 9999)
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# 主函数：将 db_path 数据导入 db_node
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def MigratePathToNode(db_path='../src/db_ntfs_info.db'):
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conn = sqlite3.connect(db_path)
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cursor = conn.cursor()
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group_id = GetFirstGroupId(cursor)
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user_id = GetFirstUserId(cursor)
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device_id = GetDeviceId(cursor)
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cursor.execute("SELECT ID, Path, Name, ParentID FROM db_path")
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rows = cursor.fetchall()
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for row in rows:
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path_id, full_path, name, parent_id = row
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# 计算字段
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name_hash = hashlib.sha256(name.encode()).hexdigest()
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dir_layer = GetDirLayer(full_path)
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extend_name_id = GetExtendNameId(name, cursor)
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file_size = GetFileSize(full_path)
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file_hash = GetFileHash(full_path)
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extent_count = GetExtentCount(full_path)
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# 构建插入语句字段和参数
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fields = [
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'PathID', 'ParentID', 'NameHash', 'PathHash',
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'ExtendNameID', 'DirLayer', 'GroupID', 'UserID',
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'FileSize', 'FileMode', 'FileHash', 'ExtentCount'
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]
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values = [
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path_id, parent_id, name_hash, '', # PathHash 待填
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extend_name_id, dir_layer, group_id, user_id,
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file_size, 'default', file_hash, extent_count
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]
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# 查询 PathHash（与 db_path.PathHash 一致）
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cursor.execute("SELECT PathHash FROM db_path WHERE ID = ?", (path_id,))
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path_hash_result = cursor.fetchone()
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path_hash = path_hash_result[0] if path_hash_result else ""
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values[3] = path_hash # 替换 PathHash
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# 处理 Extent 片段字段
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extent_data = []
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for i in range(1, 5):
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if i <= extent_count:
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location = GetRandomLocation()
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length = GetRandomLength()
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extent_data.extend([device_id, location, length])
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else:
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extent_data.extend([None, None, None])
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# 拼接字段和值
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extent_fields = [
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"extent1_DeviceID", "extent1_Location", "extent1_Length",
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"extent2_DeviceID", "extent2_Location", "extent2_Length",
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"extent3_DeviceID", "extent3_Location", "extent3_Length",
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"extent4_DeviceID", "extent4_Location", "extent4_Length"
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]
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fields += extent_fields
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values += extent_data
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# 构建 SQL 插入语句
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placeholders = ', '.join('?' * len(values))
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insert_sql = f"INSERT INTO db_node ({', '.join(fields)}) VALUES ({placeholders})"
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# 执行插入
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cursor.execute(insert_sql, values)
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conn.commit()
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conn.close()
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print("✅ db_path 数据已成功迁移到 db_node 表")
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if __name__ == '__main__':
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MigratePathToNode()
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