| import sqlite3 |
| import zlib |
| import os |
|
|
| OLD_DB = 'posts.db' |
| NEW_DB = 'posts_uncompressed.db' |
|
|
| def decompress_text(blob_data): |
| if not blob_data: |
| return None |
| if isinstance(blob_data, str): |
| return blob_data |
| try: |
| return zlib.decompress(blob_data).decode('utf-8') |
| except zlib.error: |
| return blob_data.decode('utf-8', errors='replace') |
|
|
| def restore_database(): |
| if not os.path.exists(OLD_DB): |
| print(f"База данных {OLD_DB} не найдена.") |
| return |
|
|
| if os.path.exists(NEW_DB): |
| os.remove(NEW_DB) |
|
|
| conn_old = sqlite3.connect(OLD_DB) |
| conn_old.row_factory = sqlite3.Row |
| cursor_old = conn_old.cursor() |
|
|
| conn_new = sqlite3.connect(NEW_DB) |
| cursor_new = conn_new.cursor() |
|
|
| cursor_new.execute(''' |
| CREATE TABLE IF NOT EXISTS posts ( |
| id TEXT PRIMARY KEY, |
| channel_id TEXT, |
| html TEXT, |
| text TEXT, |
| views_count INTEGER, |
| reactions_count INTEGER, |
| created_at TEXT, |
| image_url TEXT, |
| content_type TEXT, |
| forward_from_chat_name TEXT, |
| forward_from_chat_link TEXT, |
| forward_from_icon_url TEXT, |
| er REAL, |
| err REAL, |
| reactions TEXT, |
| id_full TEXT, |
| comments_count INTEGER, |
| link TEXT, |
| views_total INTEGER, |
| views_1h INTEGER, |
| views_24h INTEGER, |
| channel_name TEXT, |
| channel_image_url TEXT, |
| attaches TEXT, |
| elements TEXT |
| ) |
| ''') |
|
|
| cursor_new.execute(''' |
| CREATE TABLE IF NOT EXISTS scraped_channels ( |
| channel_id TEXT PRIMARY KEY, |
| target_count INTEGER, |
| fetched_count INTEGER, |
| total_available INTEGER, |
| is_completed INTEGER |
| ) |
| ''') |
|
|
| print("Чтение сжатых данных...") |
| cursor_old.execute("SELECT * FROM posts") |
| rows = cursor_old.fetchall() |
|
|
| if not rows: |
| print("Таблица posts пуста.") |
| else: |
| print(f"Найдено {len(rows)} постов. Начинаю распаковку...") |
| |
| columns = rows[0].keys() |
| placeholders = ",".join(["?"] * len(columns)) |
| fields_to_decompress = {'html', 'text', 'reactions', 'attaches', 'elements'} |
| |
| new_records = [] |
| for row in rows: |
| new_row = [] |
| for col in columns: |
| if col in fields_to_decompress: |
| new_row.append(decompress_text(row[col])) |
| else: |
| new_row.append(row[col]) |
| new_records.append(tuple(new_row)) |
|
|
| cursor_new.executemany(f"INSERT INTO posts VALUES ({placeholders})", new_records) |
|
|
| cursor_old.execute("SELECT * FROM scraped_channels") |
| channels = cursor_old.fetchall() |
| if channels: |
| ch_columns = len(channels[0].keys()) |
| ch_placeholders = ",".join(["?"] * ch_columns) |
| |
| ch_records = [tuple(row) for row in channels] |
| cursor_new.executemany(f"INSERT INTO scraped_channels VALUES ({ch_placeholders})", ch_records) |
|
|
| conn_new.commit() |
| conn_old.close() |
| conn_new.close() |
|
|
| old_size = os.path.getsize(OLD_DB) / (1024 * 1024) |
| new_size = os.path.getsize(NEW_DB) / (1024 * 1024) |
| |
| print("\nБаза данных успешно распакована.") |
| print(f"Размер сжатой БД ({OLD_DB}): {old_size:.2f} MB") |
| print(f"Размер распакованной БД ({NEW_DB}): {new_size:.2f} MB") |
|
|
| if __name__ == '__main__': |
| restore_database() |
