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Filename :
php_conf_reader.py
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# -*- coding: utf-8 -*- # Copyright © Cloud Linux GmbH & Cloud Linux Software, Inc 2010-2018 All Rights Reserved # # Licensed under CLOUD LINUX LICENSE AGREEMENT # http://cloudlinux.com/docs/LICENSE.TXT # import copy import re class PhpConfBaseException(Exception): """Base class for all php.conf exceptions""" def __init__(self, message): super().__init__(message) class PhpConfReadError(PhpConfBaseException): def __init__(self, message=None): if message is None: message = "File open/read error" super().__init__(message) class PhpConfLoadException(PhpConfBaseException): def __init__(self, line_num, reason): message = f"Error at line {line_num}: {reason}. Please see " \ "http://docs.cloudlinux.com/index.html?custom_php_ini_options.html" super().__init__(message) class PhpConfNoSuchAlternativeException(PhpConfBaseException): def __init__(self, version): self.php_version = version message = f'No such alternative version ({version})' super().__init__(message) # For unit tests def _open(file_name): return open(file_name, mode='rb') class PhpConfReader: """ Class for read and parse /etc/cl.selector/php.conf During read this file, its syntax check is performed Contains methods for get its data for selectoctl and cagefsctl utilities in required formats """ DIRECTIVES_LIST = ['Directive', 'Default', 'Type', 'Comment', 'Range', 'Remark'] TYPES_LIST = ['value', 'list', 'bool'] def __init__(self, phpconf_path): self.phpconf_path = phpconf_path # /etc/cl.selector/php.conf contents as dictionary # Example: # { 'safe_mode': {'Default': 'Off', 'Comment': 'Enables PHP safe mode.', # 'Remark': '<5.4.0', 'Type': 'bool'}, # 'file_uploads': {'Default': 'On', 'Comment': 'Allows uploading files over HTTP.', # 'Type': 'bool'} # } self._php_conf = None def _read_file(self): """ Reads file and returns its content :return: List of filelines """ try: f = _open(self.phpconf_path) conf_lines = f.readlines() f.close() return conf_lines except (OSError, IOError) as e: # Open/read error raise PhpConfReadError(e.strerror) from e def _php_conf_load(self): data = {} conf_lines = self._read_file() try: directive = None current_section = None # Analyze lines for line_num, line in enumerate(conf_lines, start=1): # line example: 'Directive = upload_max_filesize' line = line.strip().decode('utf-8', "ignore") # pass comments if line.startswith('#'): continue # Empty line - separator between directives if len(line) == 0: directive = None current_section = None continue if '=' not in line: # Separator = not found in line - error raise PhpConfLoadException(line_num, "Required separator = not found") line_parts = line.split('=', 1) directive_name = line_parts[0].strip() directive_value = line_parts[1].strip() if directive_name not in self.DIRECTIVES_LIST: # Invalid directive raise PhpConfLoadException(line_num, f"Unknown directive '{directive_name}' found") if not directive and directive_name != 'Directive': # No current directive and some other directive found - error raise PhpConfLoadException(line_num, f"'{directive_name}' found, but no 'Directive' before it") if directive_name == 'Directive': if directive: # 'Directive' duplicate raise PhpConfLoadException(line_num, f"Directive '{directive_name}' duplicate") # Save current directive name and create placeholder for diirective data directive = directive_value current_section = directive_value data[current_section] = {} else: if directive_name in data[current_section]: # Directive already present raise PhpConfLoadException(line_num, f"Directive '{directive_name}' duplicate") if directive_name == 'Type' and directive_value not in self.TYPES_LIST: raise PhpConfLoadException(line_num, f"Directive is Type, but it value '{directive_value}' is invalid") data[current_section][directive_name] = directive_value # Successfull end self._php_conf = data except PhpConfLoadException as e: # Parsing error raise e except Exception as e: raise PhpConfBaseException(e) from e def get_config_for_selectorctl(self, php_version, php_versions_map): """ Retrives php.conf for selectorctl needs :param php_version: PHP version to filter options :param php_versions_map: Short to full PHP version map. Example: {'4.4', '4.4.9'} :return: dict Example: {'file_uploads': {'default': 'On', 'comment': 'Allows uploading files over HTTP.', 'type': 'bool'}, 'max_execution_time': {'default': '30', 'comment': 'The maximum time in seconds a script is allowed to run ' 'before it is terminated.', 'type': 'value'}, } """ # if config not loaded - load it if not self._php_conf: self._php_conf_load() out_dict = {} for directive_name, directive_data in self._php_conf.items(): # directive_data example: # { 'Default': 'Off', 'Comment': 'Enables PHP safe mode.', # 'Remark': '<5.4.0', 'Type': 'bool'} # if directive has Remark attribute, compare version with supplied and pass if need if 'Remark' in directive_data and not self._check_version(directive_data['Remark'], php_version, php_versions_map): continue out_dict[directive_name] = {} if 'Default' in directive_data: out_dict[directive_name]['default'] = directive_data['Default'] if 'Comment' in directive_data: out_dict[directive_name]['comment'] = directive_data['Comment'] if 'Type' in directive_data: out_dict[directive_name]['type'] = directive_data['Type'] if 'Range' in directive_data: out_dict[directive_name]['range'] = directive_data['Range'] return out_dict def get_config_for_cagefsctl(self): """ Retrives php.conf for selectorctl needs :return: dict Example: {'safe_mode': {'Remark': '<5.4.0', 'Type': 'bool'}, 'file_uploads': {'Type': 'bool'} } """ # if config not loaded - load it if not self._php_conf: self._php_conf_load() out_dict = {} for directive_name, directive_data in self._php_conf.items(): out_dict[directive_name] = copy.deepcopy(directive_data) if 'Comment' in out_dict[directive_name]: del out_dict[directive_name]['Comment'] return out_dict @staticmethod def _check_version(test, version, php_versions_map): """ Compares version in use and version required by PHP feature and return true if PHP feature satisfies :param test: Condition to filter from php.conf ('Remark' option value), such as <5.4.0 :param version: PHP Verson to check filter matching, such as 5.3 :param php_versions_map: Short to full PHP version map. Example: {'4.4': '4.4.9'} :return: bool: true - condition true, false - else """ # if test has 2 section, add third if len(test.split('.')) == 2: test += '.0' patt = re.compile(r'([<>=]{1,2})?(\d+\.\d+\.\d+)\.?') m = patt.match(test) if not m: raise PhpConfNoSuchAlternativeException(test) action = m.group(1) test_int = PhpConfReader._full_version_string_to_int(m.group(2), action) version_int = PhpConfReader._full_version_string_to_int(php_versions_map[version], action) if action == r'<' and version_int < test_int: return True if action == r'<=' and version_int <= test_int: return True if action == r'>' and version_int > test_int: return True if action == r'>=' and version_int >= test_int: return True if not action or action == r'=': if version_int == test_int: return True return False @staticmethod def _full_version_string_to_int(s_ver_full, action): """ Convert version string (such as '5.3.29') to int (10653) :param s_ver_full: PHP version string. Only full, 3-section versions are allowed :param action: Compare type. If None or '=' function will not use third section from version :return: integer """ v_array = [int(x) for x in s_ver_full.split('.')] ver_int = v_array[0] << 11 | v_array[1] << 7 if not action or action == r'=': return ver_int return ver_int | v_array[2]