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#!/opt/alt/python37/bin/python3 -bb
# coding=utf-8
#
# Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2020 All Rights Reserved
#
# Licensed under CLOUD LINUX LICENSE AGREEMENT
# http://cloudlinux.com/docs/LICENCE.TXT
#
import os
import contextlib
import sqlite3
from datetime import datetime, timedelta
from sqlalchemy import (
Column,
Boolean,
DateTime,
Integer,
String,
create_engine,
event
)
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.engine.reflection import Inspector
from sqlalchemy.orm import Session
from wmt.common.const import WMT_DB, RETENTION_TIME_DAYS
Base = declarative_base()
class ScrapeResult(Base):
"""
created_date is saved in local TZ format
"""
__tablename__ = 'scrape_result'
id = Column(Integer, primary_key=True)
website = Column(String)
create_date = Column(DateTime, default=lambda: datetime.now(), index=True)
is_finished = Column(Boolean)
response_code = Column(Integer, nullable=True)
response_time_ms = Column(Integer, nullable=True)
class DomainAlerts(Base):
"""
alert_time is saved in local TZ format
"""
__tablename__ = 'domain_alerts'
id = Column(Integer, primary_key=True)
website = Column(String, index=True)
alert_time = Column(DateTime, default=lambda: datetime.now(), index=True)
is_resolved = Column(Boolean, default=False)
def cleanup_old_data(engine):
n_days_ago = datetime.today() - timedelta(days=RETENTION_TIME_DAYS)
with session_scope(engine) as session:
session.query(ScrapeResult)\
.filter(ScrapeResult.create_date < n_days_ago)\
.delete()
session.query(DomainAlerts)\
.filter(DomainAlerts.alert_time < n_days_ago)\
.delete()
def create_db_if_not_exist(engine):
if not is_db_present(engine):
Base.metadata.create_all(engine)
def is_db_present(engine):
if not os.path.isfile(WMT_DB):
return False
database_inspection = Inspector.from_engine(engine)
tables = [table for table in database_inspection.get_table_names()]
return len(tables) > 0
def setup_wal_mode(dbapi_con, con_record):
dbapi_con.execute('PRAGMA journal_mode = WAL')
def setup_database(readonly=False):
connection_string = f'file:{WMT_DB}'
if readonly:
connection_string = f'{connection_string}?mode=ro'
creator = lambda: sqlite3.connect(connection_string, uri=True)
engine = create_engine(
'sqlite:////', creator=creator, echo=False,
)
event.listen(engine, 'connect', setup_wal_mode)
create_db_if_not_exist(engine)
return engine
@contextlib.contextmanager
def session_scope(engine) -> Session:
"""Provide a transactional scope around a series of operations."""
session = Session(bind=engine)
try:
yield session
session.commit()
except:
session.rollback()
raise
finally:
session.close()
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