128 lines
4.6 KiB
Python
128 lines
4.6 KiB
Python
import hashlib
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import string
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from datetime import datetime, timedelta
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import unicodedata
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def md5(s):
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'''
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MD5摘要
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:param str: 字符串
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:return: 经MD5以后的字符串
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'''
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h = hashlib.md5(s.encode(encoding='utf-8'))
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return h.hexdigest()
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# import model.user after the defination of md5(s) to avoid circular import
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from model.user import get_user_by_username, insert_user, update_password_by_username
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path_prefix = '/var/www/wordfreq/wordfreq/'
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path_prefix = './' # comment this line in deployment
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def verify_user(username, password):
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user = get_user_by_username(username)
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encoded_password = md5(username + password)
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return user is not None and user.password == encoded_password
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def add_user(username, password):
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start_date = datetime.now().strftime('%Y%m%d')
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expiry_date = (datetime.now() + timedelta(days=30)).strftime('%Y%m%d') # will expire after 30 days
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# 将用户名和密码一起加密，以免暴露不同用户的相同密码
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password = md5(username + password)
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insert_user(username=username, password=password, start_date=start_date, expiry_date=expiry_date)
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def check_username_availability(username):
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existed_user = get_user_by_username(username)
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return existed_user is None
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def change_password(username, old_password, new_password):
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'''
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修改密码
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:param username: 用户名
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:param old_password: 旧的密码
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:param new_password: 新密码
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:return: 修改成功:True 否则:False
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'''
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if not verify_user(username, old_password): # 旧密码错误
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return {'error':'Old password is wrong.', 'username':username}
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# 将用户名和密码一起加密，以免暴露不同用户的相同密码
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if new_password == old_password: #新旧密码一致
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return {'error':'New password cannot be the same as the old password.', 'username':username}
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update_password_by_username(username, new_password)
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return {'success':'Password changed', 'username':username}
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def get_expiry_date(username):
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user = get_user_by_username(username)
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if user is None:
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return '20191024'
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else:
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return user.expiry_date
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class UserName:
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def __init__(self, username):
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self.username = username
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def contains_chinese(self):
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for char in self.username:
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# Check if the character is in the CJK (Chinese, Japanese, Korean) Unicode block
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if unicodedata.name(char).startswith('CJK UNIFIED IDEOGRAPH'):
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return True
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return False
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def validate(self):
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if len(self.username) > 20:
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return f'{self.username} is too long. The user name cannot exceed 20 characters.'
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if self.username.startswith('.'): # a user name must not start with a dot
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return 'Period (.) is not allowed as the first letter in the user name.'
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if ' ' in self.username: # a user name must not include a whitespace
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return 'Whitespace is not allowed in the user name.'
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for c in self.username: # a user name must not include special characters, except non-leading periods or underscores
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if c in string.punctuation and c != '.' and c != '_':
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return f'{c} is not allowed in the user name.'
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if self.username in ['signup', 'login', 'logout', 'reset', 'mark', 'back', 'unfamiliar', 'familiar', 'del',
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'admin']:
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return 'You used a restricted word as your user name. Please come up with a better one.'
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if self.contains_chinese():
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return 'Chinese characters are not allowed in the user name.'
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return 'OK'
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class Password:
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def __init__(self, password):
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self.password = password
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def contains_chinese(self):
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for char in self.password:
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# Check if the character is in the CJK (Chinese, Japanese, Korean) Unicode block
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if unicodedata.name(char).startswith('CJK UNIFIED IDEOGRAPH'):
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return True
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return False
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def validate(self):
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if len(self.password) < 4:
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return 'Password must be at least 4 characters long.'
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if ' ' in self.password:
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return 'Password cannot contain spaces.'
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if self.contains_chinese():
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return 'Chinese characters are not allowed in the password.'
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return 'OK'
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class WarningMessage:
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def __init__(self, s, type='username'):
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self.s = s
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self.type = type
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def __str__(self):
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if self.type == 'username':
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return UserName(self.s).validate()
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if self.type == 'password':
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return Password(self.s).validate()
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