251 lines
7.7 KiB
Python
251 lines
7.7 KiB
Python
"""
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SQLite下载历史管理器
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用于记录图片下载历史，不修改生产MySQL数据库
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"""
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import os
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import sqlite3
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from datetime import datetime
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from typing import List, Dict, Optional
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import sys
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# 添加父目录到路径
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sys.path.append(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
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from config import SQLITE_DB_PATH
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class SQLiteManager:
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"""SQLite下载历史管理器"""
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def __init__(self, db_path: str = SQLITE_DB_PATH):
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"""初始化SQLite连接"""
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self.db_path = db_path
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self._init_database()
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def _init_database(self):
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"""初始化数据库表结构"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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# 创建下载历史表
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cursor.execute('''
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CREATE TABLE IF NOT EXISTS download_history (
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id INTEGER PRIMARY KEY AUTOINCREMENT,
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datasource TEXT NOT NULL,
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goods_id INTEGER,
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goods_name TEXT,
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image_url TEXT NOT NULL,
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local_path TEXT NOT NULL,
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download_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
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file_size INTEGER,
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UNIQUE(datasource, image_url)
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)
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''')
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# 创建索引
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cursor.execute('''
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CREATE INDEX IF NOT EXISTS idx_datasource_goods_id
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ON download_history(datasource, goods_id)
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''')
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cursor.execute('''
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CREATE INDEX IF NOT EXISTS idx_download_time
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ON download_history(download_time)
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''')
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conn.commit()
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conn.close()
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print(f"SQLite数据库初始化成功: {self.db_path}")
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except Exception as e:
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print(f"SQLite数据库初始化失败: {e}")
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raise
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def add_download_record(
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self,
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datasource: str,
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goods_id: int,
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goods_name: str,
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image_url: str,
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local_path: str,
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file_size: int
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) -> bool:
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"""
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添加下载记录
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Returns:
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是否成功
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"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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cursor.execute('''
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INSERT OR REPLACE INTO download_history
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(datasource, goods_id, goods_name, image_url, local_path, file_size, download_time)
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VALUES (?, ?, ?, ?, ?, ?, ?)
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''', (
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datasource,
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goods_id,
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goods_name,
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image_url,
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local_path,
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file_size,
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datetime.now()
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))
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conn.commit()
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conn.close()
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return True
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except Exception as e:
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print(f"添加下载记录失败: {e}")
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return False
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def is_downloaded(self, datasource: str, image_url: str) -> bool:
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"""
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检查图片是否已下载（检查数据库记录 + 文件是否存在）
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Args:
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datasource: 数据源
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image_url: 图片URL
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Returns:
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是否已下载
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"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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cursor.execute('''
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SELECT local_path FROM download_history
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WHERE datasource = ? AND image_url = ?
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''', (datasource, image_url))
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result = cursor.fetchone()
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conn.close()
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if result:
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local_path = result[0]
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# 检查文件是否真实存在
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return os.path.exists(local_path)
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return False
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except Exception as e:
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print(f"检查下载状态失败: {e}")
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return False
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def get_download_history(
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self,
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datasource: Optional[str] = None,
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start_date: Optional[datetime] = None,
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end_date: Optional[datetime] = None,
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limit: int = 100
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) -> List[Dict]:
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"""
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获取下载历史
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Returns:
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下载记录列表
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"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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query = 'SELECT * FROM download_history WHERE 1=1'
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params = []
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if datasource:
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query += ' AND datasource = ?'
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params.append(datasource)
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if start_date:
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query += ' AND download_time >= ?'
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params.append(start_date.strftime('%Y-%m-%d %H:%M:%S'))
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if end_date:
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query += ' AND download_time <= ?'
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params.append(end_date.strftime('%Y-%m-%d %H:%M:%S'))
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query += ' ORDER BY download_time DESC LIMIT ?'
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params.append(limit)
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cursor.execute(query, params)
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columns = [desc[0] for desc in cursor.description]
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results = []
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for row in cursor.fetchall():
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results.append(dict(zip(columns, row)))
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conn.close()
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return results
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except Exception as e:
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print(f"获取下载历史失败: {e}")
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return []
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def get_download_statistics(self) -> Dict:
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"""获取下载统计信息"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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# 总下载数
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cursor.execute('SELECT COUNT(*) FROM download_history')
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total_count = cursor.fetchone()[0]
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# 各数据源下载数
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cursor.execute('''
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SELECT datasource, COUNT(*) as count
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FROM download_history
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GROUP BY datasource
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''')
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datasource_stats = {row[0]: row[1] for row in cursor.fetchall()}
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# 今日下载数
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today = datetime.now().replace(hour=0, minute=0, second=0, microsecond=0)
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cursor.execute('''
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SELECT COUNT(*) FROM download_history
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WHERE download_time >= ?
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''', (today.strftime('%Y-%m-%d %H:%M:%S'),))
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today_count = cursor.fetchone()[0]
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conn.close()
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return {
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'total_count': total_count,
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'datasource_stats': datasource_stats,
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'today_count': today_count
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}
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except Exception as e:
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print(f"获取下载统计失败: {e}")
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return {}
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def clear_invalid_records(self) -> int:
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"""清理文件不存在的下载记录"""
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try:
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conn = sqlite3.connect(self.db_path)
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cursor = conn.cursor()
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cursor.execute('SELECT id, local_path FROM download_history')
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records = cursor.fetchall()
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deleted_count = 0
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for record_id, local_path in records:
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if not os.path.exists(local_path):
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cursor.execute('DELETE FROM download_history WHERE id = ?', (record_id,))
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deleted_count += 1
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conn.commit()
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conn.close()
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print(f"已清理 {deleted_count} 条无效记录")
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return deleted_count
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except Exception as e:
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print(f"清理无效记录失败: {e}")
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return 0
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