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import datetime
import os
import sys
from contextlib import contextmanager
from sqlalchemy import (Boolean, Column, Date, Integer, String, Text,
create_engine, text)
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
Base = declarative_base()
metadata = Base.metadata
class Log(Base):
__tablename__ = "log"
id = Column(Integer, primary_key=True, server_default=text(
"nextval('log_id_seq'::regclass)"))
name = Column(Text, nullable=False)
level = Column(Text, nullable=False)
msg = Column(Text, nullable=False)
func = Column(Text, nullable=True)
def as_dict(self):
"""Return JSON serializable dict."""
d = {}
for col in self.__table__.columns:
value = getattr(self, col.name)
if issubclass(value.__class__, Base):
continue
elif issubclass(value.__class__, datetime.datetime):
value = str(value)
d[col.name] = value
return d
@classmethod
def add(cls, name, level, msg, func=""):
try:
with sqla_session() as session:
logentry = Log()
logentry.name = name
logentry.level = level
logentry.msg = msg
logentry.func = func
session.add(logentry)
except Exception as e:
print(f"Failed to add logentry: {e}")
class Scanner(Base):
__tablename__ = 'scanner'
id = Column(Integer, primary_key=True, server_default=text(
"nextval('scanner_id_seq'::regclass)"))
runner = Column(Text, server_default=text("'*'::text"))
name = Column(String(128), nullable=False)
active = Column(Boolean, nullable=False)
interval = Column(Integer, nullable=False,
server_default=text("300"))
starttime = Column(Date)
endtime = Column(Date)
maxruns = Column(Integer, server_default=text("1"))
hostname = Column(String(128), nullable=False)
port = Column(Integer, nullable=False)
def as_dict(self):
d = {}
for col in self.__table__.columns:
value = getattr(self, col.name)
if issubclass(value.__class__, Base):
continue
elif issubclass(value.__class__, datetime.datetime):
value = str(value)
d[col.name] = value
return d
@classmethod
def add(cls, name, hostname, port, active=False, interval=0,
starttime=None,
endtime=None,
maxruns=1):
errors = list()
if starttime and endtime:
if starttime > endtime:
errors.append("Endtime must be after the starttime.")
if interval < 0:
errors.append("Interval must be > 0")
if maxruns < 0:
errors.append("Max runs must be > 0")
with sqla_session() as session:
scanentry = Scanner()
scanentry.name = name
scanentry.active = active
scanentry.interval = interval
if starttime:
scanentry.starttime = starttime
if endtime:
scanentry.endtime = endtime
scanentry.maxruns = maxruns
scanentry.hostname = hostname
scanentry.port = port
session.add(scanentry)
return errors
@classmethod
def get(cls, name):
results = list()
with sqla_session() as session:
scanners = session.query(Scanner).all()
if not scanners:
return None
for scanner in scanners:
if scanner.runner == "*":
results.append(scanner.as_dict())
elif scanner.runner == name:
results.append(scanner.as_dict())
return results
@classmethod
def edit(cls, name, active):
with sqla_session() as session:
scanners = session.query(Scanner).filter(
Scanner.name == name).all()
if not scanners:
return None
for scanner in scanners:
scanner.active = active
return True
def get_sqlalchemy_conn_str(**kwargs) -> str:
try:
if "SQL_HOSTNAME" in os.environ:
hostname = os.environ["SQL_HOSTNAME"]
else:
hostname = "localhost"
print("SQL_HOSTNAME not set, falling back to localhost.")
if "SQL_PORT" in os.environ:
port = os.environ["SQL_PORT"]
else:
print("SQL_PORT not set, falling back to 5432.")
port = 5432
username = os.environ["SQL_USERNAME"]
password = os.environ["SQL_PASSWORD"]
database = os.environ["SQL_DATABASE"]
except KeyError:
print("SQL_DATABASE, SQL_USERNAME, SQL_PASSWORD must be set.")
sys.exit(-2)
return (
f"postgresql://{username}:{password}@{hostname}:{port}/{database}"
)
def get_session(conn_str=""):
if conn_str == "":
conn_str = get_sqlalchemy_conn_str()
engine = create_engine(conn_str, pool_size=50, max_overflow=0)
Session = sessionmaker(bind=engine)
return Session()
@contextmanager
def sqla_session(conn_str="", **kwargs):
session = get_session(conn_str)
try:
yield session
session.commit()
except Exception:
session.rollback()
raise
finally:
session.close()
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