mirror of
https://github.com/janeczku/calibre-web
synced 2024-12-11 10:40:32 +00:00
263 lines
8.5 KiB
Python
263 lines
8.5 KiB
Python
# mysql/oursql.py
|
|
# Copyright (C) 2005-2013 the SQLAlchemy authors and contributors <see AUTHORS file>
|
|
#
|
|
# This module is part of SQLAlchemy and is released under
|
|
# the MIT License: http://www.opensource.org/licenses/mit-license.php
|
|
|
|
"""
|
|
|
|
.. dialect:: mysql+oursql
|
|
:name: OurSQL
|
|
:dbapi: oursql
|
|
:connectstring: mysql+oursql://<user>:<password>@<host>[:<port>]/<dbname>
|
|
:url: http://packages.python.org/oursql/
|
|
|
|
Unicode
|
|
-------
|
|
|
|
oursql defaults to using ``utf8`` as the connection charset, but other
|
|
encodings may be used instead. Like the MySQL-Python driver, unicode support
|
|
can be completely disabled::
|
|
|
|
# oursql sets the connection charset to utf8 automatically; all strings come
|
|
# back as utf8 str
|
|
create_engine('mysql+oursql:///mydb?use_unicode=0')
|
|
|
|
To not automatically use ``utf8`` and instead use whatever the connection
|
|
defaults to, there is a separate parameter::
|
|
|
|
# use the default connection charset; all strings come back as unicode
|
|
create_engine('mysql+oursql:///mydb?default_charset=1')
|
|
|
|
# use latin1 as the connection charset; all strings come back as unicode
|
|
create_engine('mysql+oursql:///mydb?charset=latin1')
|
|
"""
|
|
|
|
import re
|
|
|
|
from .base import (BIT, MySQLDialect, MySQLExecutionContext)
|
|
from ... import types as sqltypes, util
|
|
|
|
|
|
class _oursqlBIT(BIT):
|
|
def result_processor(self, dialect, coltype):
|
|
"""oursql already converts mysql bits, so."""
|
|
|
|
return None
|
|
|
|
|
|
class MySQLExecutionContext_oursql(MySQLExecutionContext):
|
|
|
|
@property
|
|
def plain_query(self):
|
|
return self.execution_options.get('_oursql_plain_query', False)
|
|
|
|
|
|
class MySQLDialect_oursql(MySQLDialect):
|
|
driver = 'oursql'
|
|
# Py2K
|
|
supports_unicode_binds = True
|
|
supports_unicode_statements = True
|
|
# end Py2K
|
|
|
|
supports_native_decimal = True
|
|
|
|
supports_sane_rowcount = True
|
|
supports_sane_multi_rowcount = True
|
|
execution_ctx_cls = MySQLExecutionContext_oursql
|
|
|
|
colspecs = util.update_copy(
|
|
MySQLDialect.colspecs,
|
|
{
|
|
sqltypes.Time: sqltypes.Time,
|
|
BIT: _oursqlBIT,
|
|
}
|
|
)
|
|
|
|
@classmethod
|
|
def dbapi(cls):
|
|
return __import__('oursql')
|
|
|
|
def do_execute(self, cursor, statement, parameters, context=None):
|
|
"""Provide an implementation of *cursor.execute(statement, parameters)*."""
|
|
|
|
if context and context.plain_query:
|
|
cursor.execute(statement, plain_query=True)
|
|
else:
|
|
cursor.execute(statement, parameters)
|
|
|
|
def do_begin(self, connection):
|
|
connection.cursor().execute('BEGIN', plain_query=True)
|
|
|
|
def _xa_query(self, connection, query, xid):
|
|
# Py2K
|
|
arg = connection.connection._escape_string(xid)
|
|
# end Py2K
|
|
# Py3K
|
|
# charset = self._connection_charset
|
|
# arg = connection.connection._escape_string(xid.encode(charset)).decode(charset)
|
|
arg = "'%s'" % arg
|
|
connection.execution_options(_oursql_plain_query=True).execute(query % arg)
|
|
|
|
# Because mysql is bad, these methods have to be
|
|
# reimplemented to use _PlainQuery. Basically, some queries
|
|
# refuse to return any data if they're run through
|
|
# the parameterized query API, or refuse to be parameterized
|
|
# in the first place.
|
|
def do_begin_twophase(self, connection, xid):
|
|
self._xa_query(connection, 'XA BEGIN %s', xid)
|
|
|
|
def do_prepare_twophase(self, connection, xid):
|
|
self._xa_query(connection, 'XA END %s', xid)
|
|
self._xa_query(connection, 'XA PREPARE %s', xid)
|
|
|
|
def do_rollback_twophase(self, connection, xid, is_prepared=True,
|
|
recover=False):
|
|
if not is_prepared:
|
|
self._xa_query(connection, 'XA END %s', xid)
|
|
self._xa_query(connection, 'XA ROLLBACK %s', xid)
|
|
|
|
def do_commit_twophase(self, connection, xid, is_prepared=True,
|
|
recover=False):
|
|
if not is_prepared:
|
|
self.do_prepare_twophase(connection, xid)
|
|
self._xa_query(connection, 'XA COMMIT %s', xid)
|
|
|
|
# Q: why didn't we need all these "plain_query" overrides earlier ?
|
|
# am i on a newer/older version of OurSQL ?
|
|
def has_table(self, connection, table_name, schema=None):
|
|
return MySQLDialect.has_table(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
table_name,
|
|
schema
|
|
)
|
|
|
|
def get_table_options(self, connection, table_name, schema=None, **kw):
|
|
return MySQLDialect.get_table_options(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
table_name,
|
|
schema=schema,
|
|
**kw
|
|
)
|
|
|
|
def get_columns(self, connection, table_name, schema=None, **kw):
|
|
return MySQLDialect.get_columns(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
table_name,
|
|
schema=schema,
|
|
**kw
|
|
)
|
|
|
|
def get_view_names(self, connection, schema=None, **kw):
|
|
return MySQLDialect.get_view_names(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
schema=schema,
|
|
**kw
|
|
)
|
|
|
|
def get_table_names(self, connection, schema=None, **kw):
|
|
return MySQLDialect.get_table_names(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
schema
|
|
)
|
|
|
|
def get_schema_names(self, connection, **kw):
|
|
return MySQLDialect.get_schema_names(
|
|
self,
|
|
connection.connect().execution_options(_oursql_plain_query=True),
|
|
**kw
|
|
)
|
|
|
|
def initialize(self, connection):
|
|
return MySQLDialect.initialize(
|
|
self,
|
|
connection.execution_options(_oursql_plain_query=True)
|
|
)
|
|
|
|
def _show_create_table(self, connection, table, charset=None,
|
|
full_name=None):
|
|
return MySQLDialect._show_create_table(
|
|
self,
|
|
connection.contextual_connect(close_with_result=True).
|
|
execution_options(_oursql_plain_query=True),
|
|
table, charset, full_name
|
|
)
|
|
|
|
def is_disconnect(self, e, connection, cursor):
|
|
if isinstance(e, self.dbapi.ProgrammingError):
|
|
return e.errno is None and 'cursor' not in e.args[1] and e.args[1].endswith('closed')
|
|
else:
|
|
return e.errno in (2006, 2013, 2014, 2045, 2055)
|
|
|
|
def create_connect_args(self, url):
|
|
opts = url.translate_connect_args(database='db', username='user',
|
|
password='passwd')
|
|
opts.update(url.query)
|
|
|
|
util.coerce_kw_type(opts, 'port', int)
|
|
util.coerce_kw_type(opts, 'compress', bool)
|
|
util.coerce_kw_type(opts, 'autoping', bool)
|
|
util.coerce_kw_type(opts, 'raise_on_warnings', bool)
|
|
|
|
util.coerce_kw_type(opts, 'default_charset', bool)
|
|
if opts.pop('default_charset', False):
|
|
opts['charset'] = None
|
|
else:
|
|
util.coerce_kw_type(opts, 'charset', str)
|
|
opts['use_unicode'] = opts.get('use_unicode', True)
|
|
util.coerce_kw_type(opts, 'use_unicode', bool)
|
|
|
|
# FOUND_ROWS must be set in CLIENT_FLAGS to enable
|
|
# supports_sane_rowcount.
|
|
opts.setdefault('found_rows', True)
|
|
|
|
ssl = {}
|
|
for key in ['ssl_ca', 'ssl_key', 'ssl_cert',
|
|
'ssl_capath', 'ssl_cipher']:
|
|
if key in opts:
|
|
ssl[key[4:]] = opts[key]
|
|
util.coerce_kw_type(ssl, key[4:], str)
|
|
del opts[key]
|
|
if ssl:
|
|
opts['ssl'] = ssl
|
|
|
|
return [[], opts]
|
|
|
|
def _get_server_version_info(self, connection):
|
|
dbapi_con = connection.connection
|
|
version = []
|
|
r = re.compile('[.\-]')
|
|
for n in r.split(dbapi_con.server_info):
|
|
try:
|
|
version.append(int(n))
|
|
except ValueError:
|
|
version.append(n)
|
|
return tuple(version)
|
|
|
|
def _extract_error_code(self, exception):
|
|
return exception.errno
|
|
|
|
def _detect_charset(self, connection):
|
|
"""Sniff out the character set in use for connection results."""
|
|
|
|
return connection.connection.charset
|
|
|
|
def _compat_fetchall(self, rp, charset=None):
|
|
"""oursql isn't super-broken like MySQLdb, yaaay."""
|
|
return rp.fetchall()
|
|
|
|
def _compat_fetchone(self, rp, charset=None):
|
|
"""oursql isn't super-broken like MySQLdb, yaaay."""
|
|
return rp.fetchone()
|
|
|
|
def _compat_first(self, rp, charset=None):
|
|
return rp.first()
|
|
|
|
|
|
dialect = MySQLDialect_oursql
|