254 lines
8.3 KiB
Python
254 lines
8.3 KiB
Python
import io
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import os
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from datetime import datetime
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import re
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import tempfile
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import mgzip as gzip
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import tarfile
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import sqlite3
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import pathlib
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from crypt import *
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class Backup:
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key = None
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tarball_size = "50M"
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save_location = None
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def __init__(self, key, bdd):
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self.key = key
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self.bdd = DataBase(bdd)
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def recurse(self, path):
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tarball_size = parse_size(self.tarball_size)
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files = []
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for f in os.listdir(path):
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uri = os.path.join(path, f)
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if os.path.isfile(uri):
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size = os.path.getsize(uri)
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m_date = datetime.fromtimestamp(os.path.getmtime(uri)).strftime("%Y-%m-%d %H:%M:%S.%f")
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c_date = datetime.fromtimestamp(os.path.getctime(uri)).strftime("%Y-%m-%d %H:%M:%S.%f")
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if size > tarball_size:
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crypt_name = self.bdd.add([{'name': f,
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'path': path,
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'size': size,
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'm_date': m_date,
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'c_date': c_date}],
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compress_mode="gz")
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if crypt_name is not None:
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print("Proceed", uri)
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enc = crypt(compress(uri), self.key)
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save(enc, os.path.join(self.save_location, crypt_name))
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else:
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files.append({'name': f,
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'path': path,
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'size': size,
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'm_date': m_date,
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'c_date': c_date})
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elif os.path.isdir(uri):
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self.recurse(uri)
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if len(files) > 0:
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crypt_name = self.bdd.add(files, compress_mode="tar.gz")
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if crypt_name is not None:
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print("Proceed", path, ":", [file['name'] for file in files])
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tarball = tar(files)
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enc = crypt(compress(tarball), self.key)
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save(enc, os.path.join(self.save_location, crypt_name))
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def tar(files):
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tarball = tempfile.SpooledTemporaryFile()
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with tarfile.open(fileobj=tarball, mode='w') as zipfile:
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for file in files:
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zipfile.add(file['path'])
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return tarball
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def untar(tar_file, files, save_path):
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if type(tar_file) is io.BufferedRandom or tempfile.SpooledTemporaryFile:
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tar_file.seek(0)
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zipfile = tarfile.open(fileobj=tar_file, mode='r')
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else:
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zipfile = tarfile.open(tar_file, 'r')
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for file in files:
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zipfile.extract(file['path'], path=save_path)
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zipfile.close()
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def compress(file):
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if type(file) is str:
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infile = open(file, 'rb')
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elif type(file) is io.BufferedRandom or tempfile.SpooledTemporaryFile:
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file.seek(0)
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infile = file
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compressed_file = tempfile.SpooledTemporaryFile()
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with gzip.open(compressed_file, 'wb') as zipfile:
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while chunk := infile.read(64 * 1024):
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zipfile.write(chunk)
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return compressed_file
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def uncompress(file):
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if type(file) is io.BufferedRandom or tempfile.SpooledTemporaryFile:
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file.seek(0)
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decompressed_file = tempfile.SpooledTemporaryFile()
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with gzip.open(file, 'rb') as zipfile:
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while chunk := zipfile.read(64 * 1024):
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decompressed_file.write(chunk)
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return decompressed_file
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def crypt(file, key):
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encrypted_file = tempfile.SpooledTemporaryFile()
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encrypt_file(key, file, encrypted_file)
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return encrypted_file
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def uncrypt(file, key):
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decrypted_file = tempfile.SpooledTemporaryFile()
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decrypt_file(key, file, decrypted_file)
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return decrypted_file
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def save(file, save_path):
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if not os.path.isdir(os.path.dirname(save_path)):
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os.mkdir(os.path.dirname(save_path))
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if type(file) is io.BufferedRandom or tempfile.SpooledTemporaryFile:
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file.seek(0)
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with open(save_path, 'wb') as save:
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while chunk := file.read(64 * 1024):
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save.write(chunk)
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else:
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print("Unable to save " + str(file) + " of type " + str(type(file)))
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return
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class DataBase:
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def __init__(self, base_file):
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self.conn = sqlite3.connect(base_file)
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self.__create_table()
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def __del__(self):
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self.conn.commit()
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self.conn.close()
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def __create_table(self):
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cursor = self.conn.cursor()
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS files(
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id INTEGER PRIMARY KEY UNIQUE NOT NULL,
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name TEXT,
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path TEXT,
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size INTEGER,
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m_date DATE,
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c_date DATE,
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crypt_id INTEGER,
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CONSTRAINT files_crypt_FK FOREIGN KEY (crypt_id) REFERENCES crypt(id)
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)
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""")
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cursor.execute("""
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CREATE TABLE IF NOT EXISTS crypt(
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id INTEGER PRIMARY KEY UNIQUE NOT NULL,
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compress_mode TEXT
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)
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""")
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self.conn.row_factory = dict_factory
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self.conn.commit()
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def get_crypt_id(self, list_file):
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cursor = self.conn.cursor()
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crypt_id_list = []
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for file in list_file:
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cursor.execute("""SELECT crypt_id FROM files WHERE name=? AND path=?""",
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(file['name'], file['path']))
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try:
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crypt_id_list.append(cursor.fetchone()['crypt_id'])
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except TypeError:
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pass
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if len(crypt_id_list) > 0:
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return most_frequent(crypt_id_list)
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else:
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return None
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def exist(self, file):
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cursor = self.conn.cursor()
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cursor.execute("""SELECT EXISTS (SELECT 1 FROM files WHERE name=? AND path=?) as exist""",
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(file['name'], file['path']))
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return cursor.fetchone()['exist']
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def modified(self, file):
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cursor = self.conn.cursor()
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cursor.execute("""SELECT name, path, size, m_date, c_date FROM files WHERE name=? AND path=?""",
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(file['name'], file['path']))
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bdd_file = cursor.fetchone()
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# for key in ['m_date', 'c_date']:
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# bdd_file[key] = datetime.strptime(bdd_file[key], "%Y-%m-%d %H:%M:%S.%f")
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# bdd_file['size'] = int(bdd_file['size'])
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if file == bdd_file:
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return False
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else:
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return True
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def add(self, list_file, compress_mode=None):
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cursor = self.conn.cursor()
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crypt_id = self.get_crypt_id(list_file)
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if crypt_id is None:
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cursor.execute("""SELECT IFNULL(max(id) + 1, 0) as crypt_id FROM crypt""")
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crypt_id = cursor.fetchone()['crypt_id']
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cursor.execute("""SELECT IFNULL(max(id) + 1, 0) as files_id FROM files""")
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file_id = cursor.fetchone()['files_id']
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proceed = False
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for file in list_file:
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if self.exist(file):
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if self.modified(file):
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cursor.execute("""UPDATE files SET size=?, m_date=?, c_date=?, crypt_id=? WHERE name=? AND path=?""",
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(file['size'], file['m_date'], file['c_date'], crypt_id, file['name'], file['path']))
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proceed = True
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else:
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cursor.execute("""INSERT INTO files VALUES({id}, '{name}', '{path}', '{size}', '{m_date}', '{c_date}', {crypt_id})""".format(
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id=file_id, crypt_id=crypt_id, **file))
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file_id += 1
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proceed = True
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if proceed:
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cursor.execute("""INSERT OR IGNORE INTO crypt VALUES(?, ?)""", (crypt_id, compress_mode))
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self.conn.commit()
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return str(crypt_id).zfill(5)
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else:
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return None
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def human_size(size, decimal_places=0):
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for unit in ['B', 'K', 'M', 'G', 'T']:
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if size < 1024.0:
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break
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size /= 1024.0
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return f"{size:.{decimal_places}f}{unit}"
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def parse_size(size):
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units = {"B": 1, "K": 2**10, "M": 2**20, "G": 2**30, "T": 2**40}
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if size[-1].isdigit():
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size = size + 'K'
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number, unit = re.match(r"([0-9]+)([BKMGT])", size, re.I).groups()
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return int(float(number)*units[unit])
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def most_frequent(list):
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return max(set(list), key=list.count)
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def dict_factory(cursor, row):
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d = {}
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for idx, col in enumerate(cursor.description):
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d[col[0]] = row[idx]
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return d
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