修复db客户端无法推日志的问题

db/view_db.py

@@ -0,0 +1,85 @@
+#!/usr/bin/env python3
+"""查看 database.db 各表数据 (非交互式)"""
+
+import argparse
+import sqlite3
+import os
+import sys
+
+DB_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "database.db")
+
+
+def get_tables(cur):
+    cur.execute("SELECT name FROM sqlite_master WHERE type='table' AND name NOT LIKE 'sqlite_%' ORDER BY name")
+    return [r[0] for r in cur.fetchall()]
+
+
+def print_rows(cols, rows):
+    if not rows:
+        print("(空)")
+        return
+    widths = [len(c) for c in cols]
+    str_rows = []
+    for row in rows:
+        str_row = [str(v) if v is not None else "NULL" for v in row]
+        str_rows.append(str_row)
+        for i, v in enumerate(str_row):
+            widths[i] = max(widths[i], min(len(v), 50))
+    print(" | ".join(c.ljust(widths[i]) for i, c in enumerate(cols)))
+    print("-+-".join("-" * w for w in widths))
+    for str_row in str_rows:
+        print(" | ".join(v[:50].ljust(widths[i]) for i, v in enumerate(str_row)))
+    print(f"\n({len(rows)} 行)")
+
+
+def main():
+    parser = argparse.ArgumentParser(description="查看 database.db")
+    parser.add_argument("table", nargs="?", help="要查看的表名 (不指定则列出所有表)")
+    parser.add_argument("-n", "--limit", type=int, default=50, help="最多显示行数 (默认 50)")
+    parser.add_argument("-w", "--where", help="WHERE 条件, 如: \"level='ERROR'\"")
+    parser.add_argument("-s", "--sql", help="自由 SQL 查询 (忽略 table/where/limit)")
+    args = parser.parse_args()
+
+    if not os.path.exists(DB_PATH):
+        print(f"数据库不存在: {DB_PATH}", file=sys.stderr)
+        sys.exit(1)
+
+    conn = sqlite3.connect(DB_PATH)
+    cur = conn.cursor()
+    tables = get_tables(cur)
+
+    # 自由 SQL
+    if args.sql:
+        cur.execute(args.sql)
+        cols = [d[0] for d in cur.description]
+        print_rows(cols, cur.fetchall())
+        conn.close()
+        return
+
+    # 列出所有表
+    if not args.table:
+        print(f"数据库: {DB_PATH}\n")
+        for t in tables:
+            cur.execute(f"SELECT COUNT(*) FROM [{t}]")
+            print(f"  {t} ({cur.fetchone()[0]} 行)")
+        conn.close()
+        return
+
+    # 查看指定表
+    if args.table not in tables:
+        print(f"表 '{args.table}' 不存在, 可用: {', '.join(tables)}", file=sys.stderr)
+        sys.exit(1)
+
+    sql = f"SELECT * FROM [{args.table}]"
+    if args.where:
+        sql += f" WHERE {args.where}"
+    sql += f" LIMIT {args.limit}"
+
+    cur.execute(sql)
+    cols = [d[0] for d in cur.description]
+    print_rows(cols, cur.fetchall())
+    conn.close()
+
+
+if __name__ == "__main__":
+    main()