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Edit File: internals.py

"""
Common logging, sentry reporting and confing parsing code for such tools as

- /opt/imunify360/venv/bin/imunify360_pam.py
- /opt/imunify360/venv/bin/pam_imunify_daemon-watchdog.py
- /opt/imunify360/venv/bin/pamsock_ready_check.py
"""
from configparser import ConfigParser
from functools import lru_cache, wraps
import json
import logging.config
import os
from pathlib import Path
import subprocess
import sys
import time
from typing import Dict
import urllib.request

import sentry_sdk

CONFIG = '/etc/pam_imunify/i360.ini'
SENTRY_DSN = 'https://576732f0a25446c4b1f5b4a706e6b9d5@sentry.cloudlinux.com/52'

logger = logging.getLogger(__name__)

@lru_cache(1)
def pam_imunify_config() -> Dict[str, str]:
    try:
        with open(CONFIG) as f:
            conf = ConfigParser(default_section='-')
            conf.read_string("[-]\n" + f.read())
            return conf['-']
    except Exception:
        # Being robust!
        # Furthermore, the exception is still to be reported
        # to sentry even if it occurs before logger_init()
        logger.exception("%s parsing error", CONFIG)
        return {
            'sentry': 'https://sentry.cloudlinux.com/sentry/i360-pam-imunify/',
            }

def returnvalue_filecaching(filepath: str):
    TIMEOUT = 24*60

def decorator(fun):
        @wraps(fun)
        def wrapper():
            path = Path(filepath)
            if not path.exists() or (time.time() - TIMEOUT >=
                                     path.stat().st_mtime):
                rv = fun()
                try:
                    path.write_text(rv)
                except Exception:
                    logger.exception("%s write error", filepath)
                finally:
                    return rv
            else:
                try:
                    return path.read_text()
                except Exception:
                    logger.exception("%s read error", filepath)
                    return fun()
        return wrapper
    return decorator

class _SentryTags:

@staticmethod
    @lru_cache(1)
    def name():
        tool = Path(sys.argv[0])
        if tool.is_symlink():
            tool = Path(os.readlink(sys.argv[0]))
        return tool.name

@staticmethod
    def os_version():
        os_release = Path('/etc/os-release')
        if not os_release.exists():
            return 'CloudLinux/CentOS 6'

conf = ConfigParser(default_section='-')
        conf.read_string("[-]\n" + os_release.read_text())
        return conf['-']['PRETTY_NAME'].strip('"')

@staticmethod
    @lru_cache(1)
    def server_id():
        try:
            with open('/var/imunify360/license.json') as f:
                license = json.load(f)
                return license['id']
        except FileNotFoundError:
            return 'N/A'

@staticmethod
    @returnvalue_filecaching('/var/cache/imunify360-pam_ipify.org')
    def server_ip():
        # HTTP currenly is about 0.5 sec faster than HTTPS
        with urllib.request.urlopen("http://api.ipify.org", timeout=2) as r:
            return r.read().decode()

@classmethod
    def user(cls):
        return cls.server_id()

@staticmethod
    def version():
        for cmd in [
            ['/bin/rpm', '-q', '--queryformat=%{VERSION}-%{RELEASE}', 'imunify360-pam'],
            ['/usr/bin/dpkg-query', '--showformat=${Version}', '--show', 'imunify360-pam'],
            ]:
            try:
                return subprocess.check_output(cmd, text=True).strip()
            except (FileNotFoundError, subprocess.CalledProcessError) as e:
                last_err = str(e)
        else:
            return last_err

def getLogger():
    return logging.getLogger(_SentryTags.name())

def _sentry_init():
    # Sentry error reporting (must be an url or "off")
    if ('sentry' not in pam_imunify_config() or
            not pam_imunify_config()['sentry'].startswith('http')):
        return {
            'level': 'NOTSET',
            'class': 'logging.NullHandler',
        }

sentry_sdk.init(
        dsn=SENTRY_DSN,
        # release=config.Core.VERSION,
        attach_stacktrace='on')

with sentry_sdk.configure_scope() as scope:
        for tag in (attr for attr in dir(_SentryTags) if not attr.startswith('_')):
            try:
                value = getattr(_SentryTags, tag)()
            except Exception as e:
                # It is ok to use uninialized logger to print stderr messages
                logger.exception("sentry_init() '%s' tag error", tag)
                # Being robust!
                value = str(e)
            if tag == 'user':
                scope.user = {'id': value}
            elif tag == 'os_version':
                scope.set_tag('os.version', value)
            else:
                scope.set_tag(tag, value)

return {
        'level': 'ERROR',
        'class': 'sentry_sdk.integrations.logging.SentryHandler'
    }

def _pamlog_handler():
    rv = {
        'level': 'INFO',
        'class': 'logging.FileHandler',
        'formatter': 'pam_log',
        'filename': pam_imunify_config().get('log',
                                             '/var/log/imunify360/pam.log'),
    }
    Path(rv['filename']).parent.mkdir(mode=0o700, parents=True, exist_ok=True)
    return rv

def logger_init(console_logfmt='[%(levelname)s] %(message)s',
                console_stream='sys.stderr'):
    try:
        logging.config.dictConfig({
            'version': 1,
            'handlers': {
                # 'sentry': _sentry_init(),
                'pam_log': _pamlog_handler(),
                'console': {
                    'level': 'INFO',
                    'formatter': 'console_log',
                    'class': 'logging.StreamHandler',
                    'stream': 'ext://%s' % console_stream,
                } if console_stream is not None else {
                    'level': 'NOTSET',
                    'class': 'logging.NullHandler',
                },
            },
            'root': {
                'level': 'NOTSET',
                'handlers': [
                    'console',
                    'pam_log',
                    # 'sentry'
                ]
            },
            'formatters': {
                'console_log': {'format': console_logfmt},
                'pam_log': {
                    'format': 'time="%(asctime)s" level=%(levelname)s msg="%(message)s" '
                              'cmdline="{cmdline}" '
                              'tool={tool_name}'.format(
                                  cmdline=' '.join(sys.argv),
                                  tool_name=_SentryTags.name()
                                  ),
                    'datefmt': '%Y-%m-%dT%H:%M:%S%z',
                },
            },
            'disable_existing_loggers': False
        })
    except Exception as e:
        logger.exception("failed to initiate logger: %s", e)
        return logger

return getLogger()

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