sqlmap/lib/core/replication.py
2012-12-06 11:15:05 +01:00

113 lines
3.9 KiB
Python

#!/usr/bin/env python
"""
Copyright (c) 2006-2012 sqlmap developers (http://sqlmap.org/)
See the file 'doc/COPYING' for copying permission
"""
import sqlite3
from extra.safe2bin.safe2bin import safechardecode
from lib.core.common import unsafeSQLIdentificatorNaming
from lib.core.exception import sqlmapGenericException
from lib.core.exception import sqlmapValueException
class Replication(object):
"""
This class holds all methods/classes used for database
replication purposes.
"""
def __init__(self, dbpath):
self.dbpath = dbpath
self.connection = sqlite3.connect(dbpath)
self.connection.isolation_level = None
self.cursor = self.connection.cursor()
class DataType:
"""
Using this class we define auxiliary objects
used for representing sqlite data types.
"""
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
def __repr__(self):
return "<DataType: %s>" % self
class Table:
"""
This class defines methods used to manipulate table objects.
"""
def __init__(self, parent, name, columns=None, create=True, typeless=False):
self.parent = parent
self.name = unsafeSQLIdentificatorNaming(name)
self.columns = columns
if create:
self.execute('DROP TABLE IF EXISTS "%s"' % self.name)
if not typeless:
self.execute('CREATE TABLE "%s" (%s)' % (self.name, ','.join('"%s" %s' % (unsafeSQLIdentificatorNaming(colname), coltype) for colname, coltype in self.columns)))
else:
self.execute('CREATE TABLE "%s" (%s)' % (self.name, ','.join('"%s"' % unsafeSQLIdentificatorNaming(colname) for colname in self.columns)))
def insert(self, values):
"""
This function is used for inserting row(s) into current table.
"""
if len(values) == len(self.columns):
self.execute('INSERT INTO "%s" VALUES (%s)' % (self.name, ','.join(['?']*len(values))), safechardecode(values))
else:
errMsg = "wrong number of columns used in replicating insert"
raise sqlmapValueException, errMsg
def execute(self, sql, parameters=[]):
try:
self.parent.cursor.execute(sql, parameters)
except sqlite3.OperationalError, ex:
errMsg = "problem occurred ('%s') while accessing sqlite database " % ex
errMsg += "located at '%s'. Please make sure that " % self.parent.dbpath
errMsg += "it's not used by some other program"
raise sqlmapGenericException, errMsg
def beginTransaction(self):
"""
Great speed improvement can be gained by using explicit transactions around multiple inserts.
Reference: http://stackoverflow.com/questions/4719836/python-and-sqlite3-adding-thousands-of-rows
"""
self.execute('BEGIN TRANSACTION')
def endTransaction(self):
self.execute('END TRANSACTION')
def select(self, condition=None):
"""
This function is used for selecting row(s) from current table.
"""
_ = 'SELECT * FROM %s' % self.name
if condition:
_ += 'WHERE %s' % condition
return self.execute(_)
def createTable(self, tblname, columns=None, typeless=False):
"""
This function creates Table instance with current connection settings.
"""
return Replication.Table(parent=self, name=tblname, columns=columns, typeless=typeless)
def __del__(self):
self.cursor.close()
self.connection.close()
# sqlite data types
NULL = DataType('NULL')
INTEGER = DataType('INTEGER')
REAL = DataType('REAL')
TEXT = DataType('TEXT')
BLOB = DataType('BLOB')