mirror of https://github.com/morpheus65535/bazarr
205 lines
6.7 KiB
Python
205 lines
6.7 KiB
Python
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# Cork - Authentication module for the Bottle web framework
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# Copyright (C) 2013 Federico Ceratto and others, see AUTHORS file.
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# Released under LGPLv3+ license, see LICENSE.txt
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"""
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.. module:: sqlalchemy_backend
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:synopsis: SQLAlchemy storage backend.
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"""
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import sys
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from logging import getLogger
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from . import base_backend
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log = getLogger(__name__)
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is_py3 = (sys.version_info.major == 3)
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try:
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from sqlalchemy import create_engine, delete, select, \
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Column, ForeignKey, Integer, MetaData, String, Table, Unicode
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sqlalchemy_available = True
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except ImportError: # pragma: no cover
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sqlalchemy_available = False
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class SqlRowProxy(dict):
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def __init__(self, sql_dict, key, *args, **kwargs):
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dict.__init__(self, *args, **kwargs)
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self.sql_dict = sql_dict
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self.key = key
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def __setitem__(self, key, value):
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dict.__setitem__(self, key, value)
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if self.sql_dict is not None:
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self.sql_dict[self.key] = {key: value}
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class SqlTable(base_backend.Table):
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"""Provides dictionary-like access to an SQL table."""
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def __init__(self, engine, table, key_col_name):
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self._engine = engine
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self._table = table
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self._key_col = table.c[key_col_name]
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def _row_to_value(self, row):
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row_key = row[self._key_col]
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row_value = SqlRowProxy(self, row_key,
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((k, row[k]) for k in row.keys() if k != self._key_col.name))
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return row_key, row_value
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def __len__(self):
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query = self._table.count()
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c = self._engine.execute(query).scalar()
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return int(c)
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def __contains__(self, key):
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query = select([self._key_col], self._key_col == key)
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row = self._engine.execute(query).fetchone()
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return row is not None
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def __setitem__(self, key, value):
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if key in self:
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values = value
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query = self._table.update().where(self._key_col == key)
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else:
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values = {self._key_col.name: key}
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values.update(value)
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query = self._table.insert()
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self._engine.execute(query.values(**values))
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def __getitem__(self, key):
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query = select([self._table], self._key_col == key)
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row = self._engine.execute(query).fetchone()
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if row is None:
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raise KeyError(key)
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return self._row_to_value(row)[1]
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def __iter__(self):
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"""Iterate over table index key values"""
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query = select([self._key_col])
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result = self._engine.execute(query)
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for row in result:
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key = row[0]
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yield key
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def iteritems(self):
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"""Iterate over table rows"""
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query = select([self._table])
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result = self._engine.execute(query)
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for row in result:
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key = row[0]
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d = self._row_to_value(row)[1]
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yield (key, d)
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def pop(self, key):
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query = select([self._table], self._key_col == key)
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row = self._engine.execute(query).fetchone()
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if row is None:
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raise KeyError
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query = delete(self._table, self._key_col == key)
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self._engine.execute(query)
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return row
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def insert(self, d):
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query = self._table.insert(d)
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self._engine.execute(query)
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log.debug("%s inserted" % repr(d))
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def empty_table(self):
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query = self._table.delete()
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self._engine.execute(query)
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log.info("Table purged")
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class SqlSingleValueTable(SqlTable):
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def __init__(self, engine, table, key_col_name, col_name):
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SqlTable.__init__(self, engine, table, key_col_name)
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self._col_name = col_name
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def _row_to_value(self, row):
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return row[self._key_col], row[self._col_name]
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def __setitem__(self, key, value):
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SqlTable.__setitem__(self, key, {self._col_name: value})
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class SqlAlchemyBackend(base_backend.Backend):
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def __init__(self, db_full_url, users_tname='users', roles_tname='roles',
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pending_reg_tname='register', initialize=False):
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if not sqlalchemy_available:
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raise RuntimeError("The SQLAlchemy library is not available.")
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self._metadata = MetaData()
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if initialize:
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# Create new database if needed.
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db_url, db_name = db_full_url.rsplit('/', 1)
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if is_py3 and db_url.startswith('mysql'):
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print("WARNING: MySQL is not supported under Python3")
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self._engine = create_engine(db_url, encoding='utf-8')
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try:
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self._engine.execute("CREATE DATABASE %s" % db_name)
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except Exception as e:
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log.info("Failed DB creation: %s" % e)
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# SQLite in-memory database URL: "sqlite://:memory:"
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if db_name != ':memory:' and not db_url.startswith('postgresql'):
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self._engine.execute("USE %s" % db_name)
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else:
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self._engine = create_engine(db_full_url, encoding='utf-8')
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self._users = Table(users_tname, self._metadata,
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Column('username', Unicode(128), primary_key=True),
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Column('role', ForeignKey(roles_tname + '.role')),
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Column('hash', String(256), nullable=False),
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Column('email_addr', String(128)),
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Column('desc', String(128)),
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Column('creation_date', String(128), nullable=False),
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Column('last_login', String(128), nullable=False)
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)
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self._roles = Table(roles_tname, self._metadata,
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Column('role', String(128), primary_key=True),
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Column('level', Integer, nullable=False)
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)
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self._pending_reg = Table(pending_reg_tname, self._metadata,
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Column('code', String(128), primary_key=True),
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Column('username', Unicode(128), nullable=False),
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Column('role', ForeignKey(roles_tname + '.role')),
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Column('hash', String(256), nullable=False),
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Column('email_addr', String(128)),
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Column('desc', String(128)),
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Column('creation_date', String(128), nullable=False)
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)
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self.users = SqlTable(self._engine, self._users, 'username')
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self.roles = SqlSingleValueTable(self._engine, self._roles, 'role', 'level')
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self.pending_registrations = SqlTable(self._engine, self._pending_reg, 'code')
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if initialize:
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self._initialize_storage(db_name)
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log.debug("Tables created")
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def _initialize_storage(self, db_name):
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self._metadata.create_all(self._engine)
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def _drop_all_tables(self):
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for table in reversed(self._metadata.sorted_tables):
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log.info("Dropping table %s" % repr(table.name))
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self._engine.execute(table.delete())
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def save_users(self): pass
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def save_roles(self): pass
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def save_pending_registrations(self): pass
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