697 lines
20 KiB
Python
697 lines
20 KiB
Python
# Copyright (c) 2015, Frappe Technologies Pvt. Ltd. and Contributors
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# License: MIT. See LICENSE
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import contextlib
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# imports - standard imports
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import gzip
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import os
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import sys
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from calendar import timegm
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from datetime import datetime
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from glob import glob
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from shutil import which
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# imports - third party imports
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import click
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from cryptography.fernet import Fernet
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# imports - module imports
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import frappe
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import frappe.utils
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from frappe import _, conf
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from frappe.utils import cint, get_file_size, get_url, now, now_datetime
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# backup variable for backwards compatibility
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verbose = False
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compress = False
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_verbose = verbose
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base_tables = ["__Auth", "__global_search", "__UserSettings"]
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BACKUP_ENCRYPTION_CONFIG_KEY = "backup_encryption_key"
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class BackupGenerator:
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"""
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This class contains methods to perform On Demand Backup
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To initialize, specify (db_name, user, password, db_file_name=None, db_host="127.0.0.1")
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If specifying db_file_name, also append ".sql.gz"
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"""
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def __init__(
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self,
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db_name,
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user,
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password,
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backup_path=None,
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backup_path_db=None,
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backup_path_files=None,
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backup_path_private_files=None,
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db_host=None,
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db_port=None,
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db_type=None,
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backup_path_conf=None,
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ignore_conf=False,
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compress_files=False,
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include_doctypes="",
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exclude_doctypes="",
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verbose=False,
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old_backup_metadata=False,
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):
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global _verbose
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self.compress_files = compress_files or compress
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self.db_host = db_host
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self.db_port = db_port
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self.db_name = db_name
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self.db_type = db_type
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self.user = user
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self.password = password
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self.backup_path = backup_path
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self.backup_path_conf = backup_path_conf
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self.backup_path_db = backup_path_db
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self.backup_path_files = backup_path_files
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self.backup_path_private_files = backup_path_private_files
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self.ignore_conf = ignore_conf
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self.include_doctypes = include_doctypes
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self.exclude_doctypes = exclude_doctypes
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self.partial = False
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self.old_backup_metadata = old_backup_metadata
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site = frappe.local.site or frappe.generate_hash(length=8)
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self.site_slug = site.replace(".", "_")
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self.verbose = verbose
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self.setup_backup_directory()
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self.setup_backup_tables()
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_verbose = verbose
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def setup_backup_directory(self):
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specified = (
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self.backup_path
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or self.backup_path_db
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or self.backup_path_files
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or self.backup_path_private_files
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or self.backup_path_conf
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)
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if not specified:
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backups_folder = get_backup_path()
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if not os.path.exists(backups_folder):
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os.makedirs(backups_folder, exist_ok=True)
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else:
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if self.backup_path:
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os.makedirs(self.backup_path, exist_ok=True)
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for file_path in {
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self.backup_path_files,
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self.backup_path_db,
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self.backup_path_private_files,
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self.backup_path_conf,
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}:
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if file_path:
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dir = os.path.dirname(file_path)
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os.makedirs(dir, exist_ok=True)
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def setup_backup_tables(self):
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"""Sets self.backup_includes, self.backup_excludes based on passed args"""
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existing_tables = frappe.db.get_tables()
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def get_tables(doctypes):
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tables = []
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for doctype in doctypes:
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if not doctype:
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continue
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table = frappe.utils.get_table_name(doctype)
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if table in existing_tables:
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tables.append(table)
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return tables
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passed_tables = {
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"include": get_tables(self.include_doctypes.strip().split(",")),
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"exclude": get_tables(self.exclude_doctypes.strip().split(",")),
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}
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specified_tables = get_tables(frappe.conf.get("backup", {}).get("includes", []))
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include_tables = (specified_tables + base_tables) if specified_tables else []
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conf_tables = {
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"include": include_tables,
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"exclude": get_tables(frappe.conf.get("backup", {}).get("excludes", [])),
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}
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self.backup_includes = passed_tables["include"]
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self.backup_excludes = passed_tables["exclude"]
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if not self.backup_includes and not self.backup_excludes and not self.ignore_conf:
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self.backup_includes = self.backup_includes or conf_tables["include"]
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self.backup_excludes = self.backup_excludes or conf_tables["exclude"]
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self.partial = (self.backup_includes or self.backup_excludes) and not self.ignore_conf
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@property
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def site_config_backup_path(self):
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# For backwards compatibility
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click.secho(
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"BackupGenerator.site_config_backup_path has been deprecated in favour of"
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" BackupGenerator.backup_path_conf",
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fg="yellow",
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)
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return getattr(self, "backup_path_conf", None)
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def get_backup(self, older_than=24, ignore_files=False, force=False):
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"""
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Takes a new dump if existing file is old
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and sends the link to the file as email
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"""
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# Check if file exists and is less than a day old
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# If not Take Dump
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if not force:
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(
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last_db,
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last_file,
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last_private_file,
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site_config_backup_path,
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) = self.get_recent_backup(older_than)
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else:
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last_db, last_file, last_private_file, site_config_backup_path = (
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False,
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False,
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False,
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False,
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)
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if not (
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self.backup_path_conf
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and self.backup_path_db
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and self.backup_path_files
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and self.backup_path_private_files
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):
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self.set_backup_file_name()
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if not (last_db and last_file and last_private_file and site_config_backup_path):
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self.take_dump()
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self.copy_site_config()
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if not ignore_files:
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self.backup_files()
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if frappe.get_system_settings("encrypt_backup"):
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self.backup_encryption()
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else:
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self.backup_path_files = last_file
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self.backup_path_db = last_db
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self.backup_path_private_files = last_private_file
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self.backup_path_conf = site_config_backup_path
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def set_backup_file_name(self):
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partial = "-partial" if self.partial else ""
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ext = "tgz" if self.compress_files else "tar"
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enc = "-enc" if frappe.get_system_settings("encrypt_backup") else ""
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self.todays_date = now_datetime().strftime("%Y%m%d_%H%M%S")
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for_conf = f"{self.todays_date}-{self.site_slug}-site_config_backup{enc}.json"
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for_db = f"{self.todays_date}-{self.site_slug}{partial}-database{enc}.sql.gz"
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for_public_files = f"{self.todays_date}-{self.site_slug}-files{enc}.{ext}"
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for_private_files = f"{self.todays_date}-{self.site_slug}-private-files{enc}.{ext}"
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backup_path = self.backup_path or get_backup_path()
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if not self.backup_path_conf:
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self.backup_path_conf = os.path.join(backup_path, for_conf)
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if not self.backup_path_db:
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self.backup_path_db = os.path.join(backup_path, for_db)
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if not self.backup_path_files:
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self.backup_path_files = os.path.join(backup_path, for_public_files)
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if not self.backup_path_private_files:
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self.backup_path_private_files = os.path.join(backup_path, for_private_files)
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def backup_encryption(self):
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"""
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Encrypt all the backups created using gpg.
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"""
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if which("gpg") is None:
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click.secho("Please install `gpg` and ensure its available in your PATH", fg="red")
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sys.exit(1)
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paths = (self.backup_path_db, self.backup_path_files, self.backup_path_private_files)
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for path in paths:
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if os.path.exists(path):
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cmd_string = "gpg --yes --passphrase {passphrase} --pinentry-mode loopback -c {filelocation}"
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try:
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command = cmd_string.format(
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passphrase=get_or_generate_backup_encryption_key(),
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filelocation=path,
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)
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frappe.utils.execute_in_shell(command)
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os.rename(path + ".gpg", path)
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except Exception as err:
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print(err)
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click.secho(
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"Error occurred during encryption. Files are stored without encryption.", fg="red"
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)
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def get_recent_backup(self, older_than, partial=False):
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backup_path = get_backup_path()
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if not frappe.get_system_settings("encrypt_backup"):
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file_type_slugs = {
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"database": "*-{{}}-{}database.sql.gz".format("*" if partial else ""),
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"public": "*-{}-files.tar",
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"private": "*-{}-private-files.tar",
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"config": "*-{}-site_config_backup.json",
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}
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else:
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file_type_slugs = {
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"database": "*-{{}}-{}database.enc.sql.gz".format("*" if partial else ""),
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"public": "*-{}-files.enc.tar",
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"private": "*-{}-private-files.enc.tar",
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"config": "*-{}-site_config_backup.json",
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}
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def backup_time(file_path):
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file_name = file_path.split(os.sep)[-1]
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file_timestamp = file_name.split("-", 1)[0]
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return timegm(datetime.strptime(file_timestamp, "%Y%m%d_%H%M%S").utctimetuple())
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def get_latest(file_pattern):
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file_pattern = os.path.join(backup_path, file_pattern.format(self.site_slug))
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file_list = glob(file_pattern)
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if file_list:
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return max(file_list, key=backup_time)
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def old_enough(file_path):
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if file_path:
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if not os.path.isfile(file_path) or is_file_old(file_path, older_than):
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return None
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return file_path
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latest_backups = {
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file_type: get_latest(pattern) for file_type, pattern in file_type_slugs.items()
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}
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recent_backups = {
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file_type: old_enough(file_name) for file_type, file_name in latest_backups.items()
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}
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return (
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recent_backups.get("database"),
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recent_backups.get("public"),
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recent_backups.get("private"),
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recent_backups.get("config"),
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)
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def zip_files(self):
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# For backwards compatibility - pre v13
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click.secho(
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"BackupGenerator.zip_files has been deprecated in favour of" " BackupGenerator.backup_files",
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fg="yellow",
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)
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return self.backup_files()
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def get_summary(self):
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summary = {
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"config": {
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"path": self.backup_path_conf,
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"size": get_file_size(self.backup_path_conf, format=True),
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},
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"database": {
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"path": self.backup_path_db,
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"size": get_file_size(self.backup_path_db, format=True),
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},
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}
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if os.path.exists(self.backup_path_files) and os.path.exists(self.backup_path_private_files):
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summary.update(
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{
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"public": {
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"path": self.backup_path_files,
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"size": get_file_size(self.backup_path_files, format=True),
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},
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"private": {
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"path": self.backup_path_private_files,
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"size": get_file_size(self.backup_path_private_files, format=True),
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},
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}
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)
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return summary
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def print_summary(self):
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backup_summary = self.get_summary()
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print(f"Backup Summary for {frappe.local.site} at {now()}")
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title = max(len(x) for x in backup_summary)
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path = max(len(x["path"]) for x in backup_summary.values())
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for _type, info in backup_summary.items():
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template = f"{{0:{title}}}: {{1:{path}}} {{2}}"
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print(template.format(_type.title(), os.path.abspath(info["path"]), info["size"]))
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def backup_files(self):
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for folder in ("public", "private"):
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files_path = frappe.get_site_path(folder, "files")
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backup_path = self.backup_path_files if folder == "public" else self.backup_path_private_files
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if self.compress_files:
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cmd_string = "set -o pipefail; tar cf - {1} | gzip > {0}"
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else:
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cmd_string = "tar -cf {0} {1}"
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frappe.utils.execute_in_shell(
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cmd_string.format(backup_path, files_path),
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verbose=self.verbose,
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low_priority=True,
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check_exit_code=True,
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)
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def copy_site_config(self):
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site_config_backup_path = self.backup_path_conf
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site_config_path = os.path.join(frappe.get_site_path(), "site_config.json")
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with open(site_config_backup_path, "w") as n, open(site_config_path) as c:
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n.write(c.read())
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def take_dump(self):
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import shlex
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import frappe.utils
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from frappe.utils.change_log import get_app_branch
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gzip_exc = which("gzip")
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if not gzip_exc:
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frappe.throw(
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_("gzip not found in PATH! This is required to take a backup."), exc=frappe.ExecutableNotFound
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)
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if self.old_backup_metadata:
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database_header_content = [
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f"Backup generated by Frappe {frappe.__version__} on branch {get_app_branch('frappe') or 'N/A'}",
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"",
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]
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else:
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database_header_content = [
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"begin frappe metadata",
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"[frappe]",
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f"version = {frappe.__version__}",
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f"branch = {get_app_branch('frappe') or 'N/A'}",
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"end frappe metadata",
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"",
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]
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if self.backup_includes:
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backup_info = ("Backing Up Tables: ", ", ".join(self.backup_includes))
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elif self.backup_excludes:
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backup_info = ("Skipping Tables: ", ", ".join(self.backup_excludes))
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if self.partial:
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if self.verbose:
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print("".join(backup_info), "\n")
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database_header_content.extend(
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[
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f"Partial Backup of Frappe Site {frappe.local.site}",
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("Backup contains: " if self.backup_includes else "Backup excludes: ") + backup_info[1],
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"",
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]
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)
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generated_header = "\n".join(f"-- {x}" for x in database_header_content) + "\n"
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with gzip.open(self.backup_path_db, "wt") as f:
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f.write(generated_header)
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cmd = []
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extra = []
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if self.db_type == "mariadb":
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if self.backup_includes:
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extra.extend(self.backup_includes)
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elif self.backup_excludes:
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extra.extend([f"--ignore-table={self.db_name}.{table}" for table in self.backup_excludes])
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elif self.db_type == "postgres":
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if self.backup_includes:
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extra.extend([f'--table=public."{table}"' for table in self.backup_includes])
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elif self.backup_excludes:
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extra.extend([f'--exclude-table-data=public."{table}"' for table in self.backup_excludes])
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from frappe.database import get_command
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bin, args, bin_name = get_command(
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host=self.db_host,
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port=self.db_port,
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user=self.user,
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password=self.password,
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db_name=self.db_name,
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extra=extra,
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dump=True,
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)
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if not bin:
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frappe.throw(
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_("{} not found in PATH! This is required to take a backup.").format(bin_name),
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exc=frappe.ExecutableNotFound,
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)
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cmd.append(bin)
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cmd.append(shlex.join(args))
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command = " ".join(["set -o pipefail;"] + cmd + ["|", gzip_exc, ">>", self.backup_path_db])
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if self.verbose:
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print(command.replace(shlex.quote(self.password), "*" * 10) + "\n")
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frappe.utils.execute_in_shell(command, low_priority=True, check_exit_code=True)
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def send_email(self):
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"""
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Sends the link to backup file located at erpnext/backups
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"""
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from frappe.email import get_system_managers
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recipient_list = get_system_managers()
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db_backup_url = get_url(os.path.join("backups", os.path.basename(self.backup_path_db)))
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files_backup_url = get_url(os.path.join("backups", os.path.basename(self.backup_path_files)))
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msg = """Hello,
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Your backups are ready to be downloaded.
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1. [Click here to download the database backup]({db_backup_url})
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2. [Click here to download the files backup]({files_backup_url})
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This link will be valid for 24 hours. A new backup will be available for
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download only after 24 hours.""".format(
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db_backup_url=db_backup_url,
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files_backup_url=files_backup_url,
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)
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datetime_str = datetime.fromtimestamp(os.stat(self.backup_path_db).st_ctime)
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subject = datetime_str.strftime("%d/%m/%Y %H:%M:%S") + """ - Backup ready to be downloaded"""
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frappe.sendmail(recipients=recipient_list, message=msg, subject=subject)
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return recipient_list
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@frappe.whitelist()
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def fetch_latest_backups(partial=False) -> dict:
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"""Fetch paths of the latest backup taken in the last 30 days.
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Note: Only for System Managers
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|
Return:
|
|
dict: relative Backup Paths
|
|
"""
|
|
frappe.only_for("System Manager")
|
|
odb = BackupGenerator(
|
|
frappe.conf.db_name,
|
|
frappe.conf.db_user,
|
|
frappe.conf.db_password,
|
|
db_host=frappe.conf.db_host,
|
|
db_port=frappe.conf.db_port,
|
|
db_type=frappe.conf.db_type,
|
|
)
|
|
database, public, private, config = odb.get_recent_backup(older_than=24 * 30, partial=partial)
|
|
|
|
return {"database": database, "public": public, "private": private, "config": config}
|
|
|
|
|
|
def scheduled_backup(
|
|
older_than=6,
|
|
ignore_files=False,
|
|
backup_path=None,
|
|
backup_path_db=None,
|
|
backup_path_files=None,
|
|
backup_path_private_files=None,
|
|
backup_path_conf=None,
|
|
ignore_conf=False,
|
|
include_doctypes="",
|
|
exclude_doctypes="",
|
|
compress=False,
|
|
force=False,
|
|
verbose=False,
|
|
old_backup_metadata=False,
|
|
):
|
|
"""this function is called from scheduler
|
|
deletes backups older than 7 days
|
|
takes backup"""
|
|
return new_backup(
|
|
older_than=older_than,
|
|
ignore_files=ignore_files,
|
|
backup_path=backup_path,
|
|
backup_path_db=backup_path_db,
|
|
backup_path_files=backup_path_files,
|
|
backup_path_private_files=backup_path_private_files,
|
|
backup_path_conf=backup_path_conf,
|
|
ignore_conf=ignore_conf,
|
|
include_doctypes=include_doctypes,
|
|
exclude_doctypes=exclude_doctypes,
|
|
compress=compress,
|
|
force=force,
|
|
verbose=verbose,
|
|
old_backup_metadata=old_backup_metadata,
|
|
)
|
|
|
|
|
|
def new_backup(
|
|
older_than=6,
|
|
ignore_files=False,
|
|
backup_path=None,
|
|
backup_path_db=None,
|
|
backup_path_files=None,
|
|
backup_path_private_files=None,
|
|
backup_path_conf=None,
|
|
ignore_conf=False,
|
|
include_doctypes="",
|
|
exclude_doctypes="",
|
|
compress=False,
|
|
force=False,
|
|
verbose=False,
|
|
old_backup_metadata=False,
|
|
):
|
|
delete_temp_backups()
|
|
odb = BackupGenerator(
|
|
frappe.conf.db_name,
|
|
frappe.conf.db_user,
|
|
frappe.conf.db_password,
|
|
db_host=frappe.conf.db_host,
|
|
db_port=frappe.conf.db_port,
|
|
db_type=frappe.conf.db_type,
|
|
backup_path=backup_path,
|
|
backup_path_db=backup_path_db,
|
|
backup_path_files=backup_path_files,
|
|
backup_path_private_files=backup_path_private_files,
|
|
backup_path_conf=backup_path_conf,
|
|
ignore_conf=ignore_conf,
|
|
include_doctypes=include_doctypes,
|
|
exclude_doctypes=exclude_doctypes,
|
|
verbose=verbose,
|
|
compress_files=compress,
|
|
old_backup_metadata=old_backup_metadata,
|
|
)
|
|
odb.get_backup(older_than, ignore_files, force=force)
|
|
return odb
|
|
|
|
|
|
def delete_temp_backups(older_than=24):
|
|
"""
|
|
Cleans up the backup_link_path directory by deleting older files
|
|
"""
|
|
older_than = cint(frappe.conf.keep_backups_for_hours) or older_than
|
|
backup_path = get_backup_path()
|
|
if os.path.exists(backup_path):
|
|
file_list = os.listdir(get_backup_path())
|
|
for this_file in file_list:
|
|
this_file_path = os.path.join(get_backup_path(), this_file)
|
|
if is_file_old(this_file_path, older_than):
|
|
os.remove(this_file_path)
|
|
|
|
|
|
def is_file_old(file_path, older_than=24) -> bool:
|
|
"""Return True if file exists and is older than specified hours."""
|
|
if os.path.isfile(file_path):
|
|
from datetime import timedelta
|
|
|
|
# Get timestamp of the file
|
|
file_datetime = datetime.fromtimestamp(os.stat(file_path).st_ctime)
|
|
if datetime.today() - file_datetime >= timedelta(hours=older_than):
|
|
if _verbose:
|
|
print(f"File {file_path} is older than {older_than} hours")
|
|
return True
|
|
else:
|
|
if _verbose:
|
|
print(f"File {file_path} is recent")
|
|
return False
|
|
else:
|
|
if _verbose:
|
|
print(f"File {file_path} does not exist")
|
|
return True
|
|
|
|
|
|
def get_backup_path():
|
|
return frappe.utils.get_site_path(conf.get("backup_path", "private/backups"))
|
|
|
|
|
|
@frappe.whitelist()
|
|
def get_backup_encryption_key():
|
|
frappe.only_for("System Manager")
|
|
return get_or_generate_backup_encryption_key()
|
|
|
|
|
|
def get_or_generate_backup_encryption_key():
|
|
from frappe.installer import update_site_config
|
|
|
|
key = frappe.conf.get(BACKUP_ENCRYPTION_CONFIG_KEY)
|
|
if key:
|
|
return key
|
|
|
|
key = Fernet.generate_key().decode()
|
|
update_site_config(BACKUP_ENCRYPTION_CONFIG_KEY, key)
|
|
|
|
return key
|
|
|
|
|
|
@contextlib.contextmanager
|
|
def decrypt_backup(file_path: str, passphrase: str):
|
|
if which("gpg") is None:
|
|
click.secho("Please install `gpg` and ensure its available in your PATH", fg="red")
|
|
sys.exit(1)
|
|
if not os.path.exists(file_path):
|
|
print("Invalid path: ", file_path)
|
|
return
|
|
else:
|
|
file_path_with_ext = file_path + ".gpg"
|
|
os.rename(file_path, file_path_with_ext)
|
|
|
|
cmd_string = "gpg --yes --passphrase {passphrase} --pinentry-mode loopback -o {decrypted_file} -d {file_location}"
|
|
command = cmd_string.format(
|
|
passphrase=passphrase,
|
|
file_location=file_path_with_ext,
|
|
decrypted_file=file_path,
|
|
)
|
|
frappe.utils.execute_in_shell(command)
|
|
try:
|
|
yield
|
|
finally:
|
|
if os.path.exists(file_path_with_ext):
|
|
if os.path.exists(file_path):
|
|
os.remove(file_path)
|
|
if os.path.exists(file_path.rstrip(".gz")):
|
|
os.remove(file_path.rstrip(".gz"))
|
|
os.rename(file_path_with_ext, file_path)
|
|
|
|
|
|
def backup(
|
|
with_files=False,
|
|
backup_path_db=None,
|
|
backup_path_files=None,
|
|
backup_path_private_files=None,
|
|
backup_path_conf=None,
|
|
):
|
|
"Backup"
|
|
odb = scheduled_backup(
|
|
ignore_files=not with_files,
|
|
backup_path_db=backup_path_db,
|
|
backup_path_files=backup_path_files,
|
|
backup_path_private_files=backup_path_private_files,
|
|
backup_path_conf=backup_path_conf,
|
|
force=True,
|
|
)
|
|
return {
|
|
"backup_path_db": odb.backup_path_db,
|
|
"backup_path_files": odb.backup_path_files,
|
|
"backup_path_private_files": odb.backup_path_private_files,
|
|
}
|