#!/opt/cloudlinux/venv/bin/python3
import logging
import os
import fnmatch
import json
from dataclasses import dataclass, asdict, field
from wmt.common.const import CONFIG_PATH, PING_CONNECTIONS
from wmt.common.exceptions import WmtConfigException
from wmt.common.url_parser import parse
from clcommon.cpapi import get_admin_email
from socket import gethostname
from typing import List
@dataclass
class Cfg:
"""
Default values, in case config has not been specified yet
"""
ping_interval: int = 30
ping_timeout: int = 10
ping_connections: int = PING_CONNECTIONS
report_email: str = None
report_top: int = 4
ignore_list: List[str] = field(default_factory=list)
summary_notification_enabled: bool = True
alert_notifications_enabled: bool = False
class ConfigManager:
def __init__(self):
self.allowed_params = Cfg.__dataclass_fields__.keys()
self.from_email = f'web-monitoring-tool@{gethostname()}'
self.default_report_email = get_admin_email()
self.cfg = self._init_cfg()
# self.ignored_domains is used as cache for checking domains if it is ignored or not
self._ignored_domains = self.generate_ignored_domains()
self.target_email = self._get_target_email()
def _get_target_email(self):
"""
This function checks to see which email address to use for TO: field of smtp.
If report_email has been defined by user then report_email will be used.
By default (in case not defined by user) default_report_email will be used
"""
return self.cfg.report_email if self.cfg.report_email else self.default_report_email
def to_dict(self):
return asdict(self.cfg)
def _init_cfg(self) -> Cfg:
# if not present - use defaults
if not self.is_present():
return Cfg()
data = self.read()
cfg = Cfg()
for key, value in data.items():
if key not in self.allowed_params:
logging.warning(
f'unsupported parameter "{key}", please ensure config contains'
f' only allowed parameters: {list(self.allowed_params)}'
)
else:
setattr(cfg, key, value)
return cfg
@staticmethod
def is_present():
return os.path.isfile(CONFIG_PATH)
def modify(self, new_json: str):
"""
Changes configuration of wmt
Returns:
self.to_dict()
Raises:
WmtConfigException
Example:
wmt-api-solo --config-change {'key': 'val'}
"""
try:
new_config = json.loads(new_json)
except json.JSONDecodeError as e:
raise WmtConfigException(str(e))
if not set(new_config.keys()).issubset(self.allowed_params):
raise WmtConfigException(f'some of passed params are unsupported, '
f'only allowed parameters: {list(self.allowed_params)}')
config = {
**self.to_dict(),
**new_config
}
if config.get('ignore_list') and isinstance(config.get('ignore_list'), str):
config['ignore_list'] = config['ignore_list'].split(',')
# Write config to /etc/wmt/config.json file
with open(CONFIG_PATH, 'w') as f:
json.dump(config, f, indent=4)
self.cfg = Cfg(**config)
return self.to_dict()
@staticmethod
def read():
try:
with open(CONFIG_PATH) as f:
data = json.load(f)
except json.JSONDecodeError as e:
raise WmtConfigException(str(e))
return data
def reload(self):
self.cfg = self._init_cfg()
def is_domain_ignored(self, domain) -> bool:
"""
Check if domain is in ignored list.
If record contain *" then it will be processed as wildcard. Else as substring
"""
for pattern in self._ignored_domains:
if '*' in pattern:
# set * on the first position if it not set to allow filter without scheme (e.g. domain.com)
if not pattern.startswith('*'):
pattern = f"*{pattern}"
if fnmatch.fnmatch(domain, pattern):
return True
else:
if pattern in domain:
return True
return False
def generate_ignored_domains(self) -> set:
"""
Generates ignored domains patterns from self.ignore_list and
returns it for using as cache in self.ignored_domains set().
"""
patterns = set()
for pattern in self.cfg.ignore_list:
patterns.add(pattern)
return patterns
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