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#!/usr/bin/env python3
import os
import sys
import subprocess
import datetime
import sqlite3
import tempfile
from pathlib import Path
from huggingface_hub import HfApi, hf_hub_download
# Set up path to include the application module
SCRIPT_DIR = Path(__file__).parent.resolve()
BACKEND_DIR = SCRIPT_DIR.parent
sys.path.append(str(BACKEND_DIR))
# Database path (actual application database)
DATA_DIR = os.environ.get("DATA_DIR", "/app/backend/data")
DB_FILE_PATH = os.path.join(DATA_DIR, "webui.db")
# Hugging Face repo paths (virtual paths in HF storage)
REPO_DB_GPG_FILE = "db_backup/webui.db.gpg"
REPO_TIMESTAMP_FILE = "db_backup/last_backup_time.txt"
def check_gpg():
"""Verify GPG is available."""
try:
subprocess.run(["gpg", "--version"], check=True, capture_output=True)
return True
except (subprocess.CalledProcessError, FileNotFoundError):
print("Error: gpg is not installed or not in PATH")
return False
def validate_environment():
"""Verify all required environment variables are set."""
required = ["BACKUP_PASSPHRASE", "HF_TOKEN", "SPACE_ID"]
missing = [var for var in required if not os.environ.get(var)]
if missing:
print(f"Error: Missing environment variables: {', '.join(missing)}")
return False
return True
def ensure_data_dir():
"""Ensure the database directory exists."""
try:
os.makedirs(DATA_DIR, mode=0o755, exist_ok=True)
return True
except Exception as e:
print(f"Error creating data directory: {e}")
return False
def get_latest_backup_info(repo_id, hf_token):
"""Check if backup exists and get its timestamp."""
api = HfApi()
try:
files = api.list_repo_files(repo_id=repo_id, repo_type="space", token=hf_token)
if REPO_DB_GPG_FILE not in files:
print("No backup file found in repository")
return False, None
if REPO_TIMESTAMP_FILE in files:
try:
timestamp_file = hf_hub_download(
repo_id=repo_id,
repo_type="space",
filename=REPO_TIMESTAMP_FILE,
token=hf_token
)
with open(timestamp_file, "r", encoding="utf-8") as f:
timestamp_str = f.read().strip()
timestamp = datetime.datetime.fromisoformat(timestamp_str)
print(f"Found backup from: {timestamp} UTC")
return True, timestamp
except Exception as e:
print(f"Could not read timestamp: {e}")
return True, None
return True, None
except Exception as e:
print(f"Error checking repository: {e}")
return False, None
def decrypt_database_from_memory(encrypted_data, passphrase):
"""Decrypt database directly from memory."""
try:
# Create a secure temporary directory for GPG operations
with tempfile.TemporaryDirectory(prefix='gpg_home_') as gpg_home:
os.chmod(gpg_home, 0o700)
# Create a temporary file for the encrypted data
with tempfile.NamedTemporaryFile(mode='wb', suffix='.gpg', delete=False) as temp_encrypted:
temp_encrypted.write(encrypted_data)
temp_encrypted_path = temp_encrypted.name
try:
print(f"Decrypting database ({len(encrypted_data)} bytes)...")
decrypt_cmd = [
"gpg",
"--batch",
"--yes",
"--homedir", gpg_home,
"--passphrase", passphrase,
"--pinentry-mode", "loopback",
"-d",
"-o", DB_FILE_PATH,
temp_encrypted_path
]
result = subprocess.run(decrypt_cmd, capture_output=True, check=True)
if os.path.exists(DB_FILE_PATH) and os.path.getsize(DB_FILE_PATH) > 0:
print(f"Database decrypted successfully ({os.path.getsize(DB_FILE_PATH)} bytes)")
return True
else:
print("Error: Decrypted database is missing or empty")
return False
finally:
# Clean up the temporary encrypted file
if os.path.exists(temp_encrypted_path):
os.unlink(temp_encrypted_path)
except subprocess.CalledProcessError as e:
print(f"Decryption failed: {e.stderr.decode()}")
return False
except Exception as e:
print(f"Decryption error: {e}")
return False
def verify_database():
"""Verify the restored database integrity."""
if not os.path.exists(DB_FILE_PATH):
print(f"Error: Database file not found at {DB_FILE_PATH}")
return False
try:
print("Verifying database integrity...")
with sqlite3.connect(DB_FILE_PATH) as conn:
cursor = conn.cursor()
cursor.execute("PRAGMA integrity_check;")
result = cursor.fetchone()[0]
cursor.execute("SELECT name FROM sqlite_master WHERE type='table';")
tables = cursor.fetchall()
if result.lower() == "ok" and len(tables) > 0:
print(f"Database verified: {len(tables)} tables found")
return True
print("Database verification failed")
return False
except Exception as e:
print(f"Database verification error: {e}")
return False
def restore_db():
"""Main restore function using in-memory approach."""
if not check_gpg() or not validate_environment() or not ensure_data_dir():
return False
passphrase = os.environ["BACKUP_PASSPHRASE"]
hf_token = os.environ["HF_TOKEN"]
space_id = os.environ["SPACE_ID"]
backup_exists, timestamp = get_latest_backup_info(space_id, hf_token)
if not backup_exists:
print("No backup found - starting with fresh database")
return True
try:
print("Downloading encrypted database...")
encrypted_file = hf_hub_download(
repo_id=space_id,
repo_type="space",
filename=REPO_DB_GPG_FILE,
token=hf_token
)
# Read encrypted data into memory
with open(encrypted_file, 'rb') as f:
encrypted_data = f.read()
print(f"Downloaded encrypted data: {len(encrypted_data)} bytes")
if not decrypt_database_from_memory(encrypted_data, passphrase):
print("Failed to decrypt database")
return False
if not verify_database():
print("Failed to verify database")
if os.path.exists(DB_FILE_PATH):
os.unlink(DB_FILE_PATH)
return False
print("Database restore completed successfully!")
return True
except Exception as e:
print(f"Restore error: {e}")
if os.path.exists(DB_FILE_PATH):
os.unlink(DB_FILE_PATH)
return False
if __name__ == "__main__":
success = restore_db()
sys.exit(0 if success else 1)
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