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ssa
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configuration
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# -*- coding: utf-8 -*- # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2021 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENSE.TXT """ This module contains validation schema for config file loaded values """ import re from schema import Schema, And, Optional, Use, SchemaError from ..internal.exceptions import SSAError _MAX_IGNORE_LIST_LENGTH = 10000 _MAX_IGNORE_PATTERNS = 100 # URLs in ssa.db can contain UTF-8 (the agent regex only blocks control chars # and a few HTTP metacharacters), and fnmatch handles UTF-8 fine, so the # validator only rejects the concrete risk: control characters in patterns. _DISALLOWED_CHARS_RE = re.compile(r'[\x00-\x1f\x7f]') _WILDCARD_ONLY_CHARS = {'*', '?'} def _validate_ignore_list(s): s = str(s) if len(s) > _MAX_IGNORE_LIST_LENGTH: raise SchemaError( f'ignore_list exceeds maximum length of {_MAX_IGNORE_LIST_LENGTH}') patterns = [p.strip() for p in s.split(',') if p.strip()] if len(patterns) > _MAX_IGNORE_PATTERNS: raise SchemaError( f'ignore_list exceeds maximum of {_MAX_IGNORE_PATTERNS} patterns') for p in patterns: # Reject any pattern composed solely of fnmatch wildcards # (*, **, ?*, *?*, ?, ??, ...) — they all match everything or any # fixed-length string and would silence the entire report. if set(p) <= _WILDCARD_ONLY_CHARS: raise SchemaError( f'ignore_list pattern must not be wildcards-only: {p!r}') if _DISALLOWED_CHARS_RE.search(p): raise SchemaError( f'ignore_list pattern contains control characters: {p!r}') return s configuration_schema = Schema({ Optional('domains_number'): And(int, lambda n: n >= 0, error='number of domains should be a positive integer'), Optional('urls_number'): And(int, lambda n: n > 0, error='number of URLs should be a positive integer'), Optional('requests_duration'): And(Use(lambda n: float(n)), lambda n: n > 0.0, error='request duration should be positive'), Optional('request_number'): And(int, lambda n: n > 0, error='number of requests should be a positive integer'), Optional('time'): And(int, lambda n: 0 <= n <= 12, error='time should be a positive integer between 1 and 12, or 0'), Optional('correlation'): And(bool, error='bad correlation value, should be On or Off'), Optional('correlation_coefficient'): And(Use(lambda n: float(n)), lambda n: 0.0 < n <= 1.0, error='correlation coefficient could not be negative or greater than 1'), Optional('ignore_list'): Use(_validate_ignore_list), Optional('summary_notification_enabled'): And(bool, error='bad notification value, should be On or Off'), }) def validate(data: dict, scheme: Schema = configuration_schema) -> dict: """ Validate given data. Returns validated data """ try: return scheme.validate(data) except SchemaError as e: raise SSAError(f'Invalid configuration: {str(e)}')
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