insistence
7 months ago
3 changed files with 179 additions and 162 deletions
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import re |
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from datetime import datetime |
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class CronUtil: |
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""" |
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Cron表达式工具类 |
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""" |
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@classmethod |
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def __valid_range(cls, search_str: str, start_range: int, end_range: int): |
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match = re.match(r'^(\d+)-(\d+)$', search_str) |
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if match: |
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start, end = int(match.group(1)), int(match.group(2)) |
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return start_range <= start < end <= end_range |
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return False |
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@classmethod |
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def __valid_sum( |
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cls, search_str: str, start_range_a: int, start_range_b: int, end_range_a: int, end_range_b: int, sum_range: int |
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): |
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match = re.match(r'^(\d+)/(\d+)$', search_str) |
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if match: |
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start, end = int(match.group(1)), int(match.group(2)) |
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return ( |
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start_range_a <= start <= start_range_b |
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and end_range_a <= end <= end_range_b |
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and start + end <= sum_range |
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) |
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return False |
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@classmethod |
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def validate_second_or_minute(cls, second_or_minute: str): |
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""" |
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校验秒或分钟值是否正确 |
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:param second_or_minute: 秒或分钟值 |
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:return: 校验结果 |
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""" |
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if ( |
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second_or_minute == '*' |
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or ('-' in second_or_minute and cls.__valid_range(second_or_minute, 0, 59)) |
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or ('/' in second_or_minute and cls.__valid_sum(second_or_minute, 0, 58, 1, 59)) |
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or re.match(r'^(?:[0-5]?\d|59)(?:,[0-5]?\d|59)*$', second_or_minute) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_hour(cls, hour: str): |
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""" |
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校验小时值是否正确 |
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:param hour: 小时值 |
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:return: 校验结果 |
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""" |
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if ( |
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hour == '*' |
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or ('-' in hour and cls.__valid_range(hour, 0, 23)) |
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or ('/' in hour and cls.__valid_sum(hour, 0, 22, 1, 23, 23)) |
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or re.match(r'^(?:0|[1-9]|1\d|2[0-3])(?:,(?:0|[1-9]|1\d|2[0-3]))*$', hour) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_day(cls, day: str): |
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""" |
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校验日值是否正确 |
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:param day: 日值 |
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:return: 校验结果 |
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""" |
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if ( |
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day in ['*', '?', 'L'] |
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or ('-' in day and cls.__valid_range(day, 1, 31)) |
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or ('/' in day and cls.__valid_sum(day, 1, 30, 1, 30, 31)) |
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or ('W' in day and re.match(r'^(?:[1-9]|1\d|2\d|3[01])W$', day)) |
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or re.match(r'^(?:0|[1-9]|1\d|2[0-9]|3[0-1])(?:,(?:0|[1-9]|1\d|2[0-9]|3[0-1]))*$', day) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_month(cls, month: str): |
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""" |
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校验月值是否正确 |
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:param month: 月值 |
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:return: 校验结果 |
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""" |
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if ( |
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month == '*' |
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or ('-' in month and cls.__valid_range(month, 1, 12)) |
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or ('/' in month and cls.__valid_sum(month, 1, 11, 1, 11, 12)) |
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or re.match(r'^(?:0|[1-9]|1[0-2])(?:,(?:0|[1-9]|1[0-2]))*$', month) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_week(cls, week: str): |
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""" |
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校验周值是否正确 |
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:param week: 周值 |
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:return: 校验结果 |
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""" |
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if ( |
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week in ['*', '?'] |
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or ('-' in week and cls.__valid_range(week, 1, 7)) |
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or re.match(r'^[1-7]#[1-4]$', week) |
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or re.match(r'^[1-7]L$', week) |
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or re.match(r'^[1-7](?:(,[1-7]))*$', week) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_year(cls, year: str): |
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""" |
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校验年值是否正确 |
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:param year: 年值 |
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:return: 校验结果 |
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""" |
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current_year = int(datetime.now().year) |
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future_years = [current_year + i for i in range(9)] |
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if ( |
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year == '*' |
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or ('-' in year and cls.__valid_range(year, current_year, 2099)) |
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or ('/' in year and cls.__valid_sum(year, current_year, 2098, 1, 2099 - current_year, 2099)) |
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or re.match(r'^[1-7]#[1-4]$', year) |
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or re.match(r'^[1-7]L$', year) |
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or ( |
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(len(year) == 4 or ',' in year) |
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and all(int(item) in future_years and current_year <= int(item) <= 2099 for item in year.split(',')) |
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) |
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): |
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return True |
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return False |
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@classmethod |
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def validate_cron_expression(cls, cron_expression: str): |
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""" |
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校验Cron表达式是否正确 |
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:param cron_expression: Cron表达式 |
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:return: 校验结果 |
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""" |
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values = cron_expression.split() |
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if len(values) != 6 and len(values) != 7: |
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return False |
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second_validation = cls.validate_second_or_minute(values[0]) |
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minute_validation = cls.validate_second_or_minute(values[1]) |
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hour_validation = cls.validate_hour(values[2]) |
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day_validation = cls.validate_day(values[3]) |
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month_validation = cls.validate_month(values[4]) |
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week_validation = cls.validate_week(values[5]) |
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validation = ( |
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second_validation |
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and minute_validation |
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and hour_validation |
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and day_validation |
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and month_validation |
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and week_validation |
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) |
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if len(values) == 6: |
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return validation |
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if len(values) == 7: |
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year_validation = cls.validate_year(values[6]) |
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return validation and year_validation |
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