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Viewing / Editing File: wmt-api.py

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#!/opt/alt/python37/bin/python3

import json
import fcntl
import os
import time
import sys
import psutil
import signal
from argparse import ArgumentParser
from datetime import datetime, timedelta

from wmt.common.const import (
    WMT_SCANNER_SERVICE_SOLO,
    WMT_LOCK_FILE,
    CONFIG_PATH
)

from wmt.common.report import generate_report, report_dict
from wmt.db import setup_database
from wmt.common.service import set_service_state
from wmt.common.notification import Notifier, SupportedNotificationTypes
from wmt.common import cfg

from cllicense import CloudlinuxLicenseLib
from wmt.common.utils import send_report_to_clickhouse


def print_result_and_exit(result='success', exit_code=0, **extra):
    message = {
        'result': result,
        'timestamp': time.time()
    }
    message.update(extra)
    print(json.dumps(message,
                     indent=2,
                     sort_keys=True))
    sys.exit(exit_code)


def get_status():
    if not os.path.exists(WMT_LOCK_FILE):
        return 'stopped'
    with open(WMT_LOCK_FILE) as f:
        try:
            fcntl.flock(f.fileno(), fcntl.LOCK_EX | fcntl.LOCK_NB)
        # locked
        except OSError:
            return 'started'
    return 'stopped'


def get_scanner_pid():
    if not os.path.exists(WMT_LOCK_FILE):
        return
    with open(WMT_LOCK_FILE) as f:
        pid = int(f.read().strip())
    return pid if psutil.pid_exists(pid) else None


def get_config():
    return cfg.to_dict()


def change_config(new_json_config):
    config = cfg.modify(new_json_config)
    scanner_pid = get_scanner_pid()
    if scanner_pid is not None:
        os.kill(scanner_pid, signal.SIGUSR1)
    return config


def run():
    args = ArgumentParser()
    args.add_argument('--config-get', action='store_true')
    args.add_argument('--config-change', type=str)

    args.add_argument('--report-get', action='store_true')
    args.add_argument('--send-clickhouse', action='store_true')
    # just for 24h report by mail executed by cron
    args.add_argument('--send-email', action='store_true')

    args.add_argument('--status', action='store_true')
    args.add_argument('--start', action='store_true')
    args.add_argument('--stop', action='store_true')

    opts = args.parse_args()

    if opts.config_get:
        config = get_config()
        config['default_report_email'] = cfg.default_report_email

        if config.get("ignore_list"):
            tmp_val = ",".join(config.get("ignore_list"))
            config['ignore_list'] = tmp_val
        print_result_and_exit(config=config)

    elif opts.config_change:
        config = change_config(opts.config_change)
        config['default_report_email'] = cfg.default_report_email
        print_result_and_exit(config=config)

    elif opts.report_get:
        engine = setup_database(readonly=True)
        # 24h back from NOW
        start, end = datetime.now() - timedelta(days=1), datetime.now()
        report = report_dict(generate_report(engine, start, end))
        print_result_and_exit(report=report, date=datetime.now().strftime('%Y-%m-%d %H:%M'))
    elif opts.send_clickhouse:
        engine = setup_database(readonly=True)
        # for the day before
        start, end = datetime.now().date() - timedelta(days=1), datetime.now().date()
        send_report_to_clickhouse(report_dict(generate_report(engine, start, end)))
        print_result_and_exit()
    elif opts.send_email:
        is_scanner_running = get_status() == 'started'
        if is_scanner_running and cfg.cfg.summary_notification_enabled:
            if not CloudlinuxLicenseLib().get_license_status():
                print_result_and_exit('CloudLinux license is expired. '
                                      'You may buy new license here: https://lp.cloudlinux.com/cloudlinux-os-solo',
                                      exit_code=1)
            engine = setup_database()
            start, end = datetime.now().date() - timedelta(days=1), datetime.now().date()
            report = generate_report(engine, start, end)
            Notifier(
                target_email=cfg.target_email,
                from_email=cfg.from_email,
                report=report, notification_type=SupportedNotificationTypes.REPORT,
            ).notify()
            print_result_and_exit()
        else:
            print_result_and_exit('Summary report email will not be sent! '
                                  f'Please, ensure "{WMT_SCANNER_SERVICE_SOLO}" service is running and '
                                  f'alert_notifications is enabled in "{CONFIG_PATH}"', exit_code=1)
    elif opts.status:
        status = get_status()
        print_result_and_exit(status=status)
    elif opts.start:
        set_service_state(WMT_SCANNER_SERVICE_SOLO, 'start')
        print_result_and_exit()
    elif opts.stop:
        set_service_state(WMT_SCANNER_SERVICE_SOLO, 'stop')
        print_result_and_exit()
    else:
        args.print_help()


def main():
    try:
        run()
    except Exception as e:
        print_result_and_exit(result='error', exit_code=1, context=str(e))


if __name__ == '__main__':
    main()
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