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# Copyright (c) 2018 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.
import io
import os
import re
import shutil
from zipfile import ZipFile, ZIP_DEFLATED, BadZipfile
from typing import Dict, Optional, TYPE_CHECKING
from UM import i18nCatalog
from UM.Logger import Logger
from UM.Message import Message
from UM.Platform import Platform
from UM.Resources import Resources
if TYPE_CHECKING:
from cura.CuraApplication import CuraApplication
class Backup:
"""The back-up class holds all data about a back-up.
It is also responsible for reading and writing the zip file to the user data folder.
"""
IGNORED_FILES = [r"cura\.log", r"plugins\.json", r"cache", r"__pycache__", r"\.qmlc", r"\.pyc"]
"""These files should be ignored when making a backup."""
catalog = i18nCatalog("cura")
"""Re-use translation catalog"""
def __init__(self, application: "CuraApplication", zip_file: bytes = None, meta_data: Dict[str, str] = None) -> None:
self._application = application
self.zip_file = zip_file # type: Optional[bytes]
self.meta_data = meta_data # type: Optional[Dict[str, str]]
def makeFromCurrent(self) -> None:
"""Create a back-up from the current user config folder."""
cura_release = self._application.getVersion()
version_data_dir = Resources.getDataStoragePath()
Logger.log("d", "Creating backup for Cura %s, using folder %s", cura_release, version_data_dir)
# Ensure all current settings are saved.
self._application.saveSettings()
# We copy the preferences file to the user data directory in Linux as it's in a different location there.
# When restoring a backup on Linux, we move it back.
if Platform.isLinux(): #TODO: This should check for the config directory not being the same as the data directory, rather than hard-coding that to Linux systems.
preferences_file_name = self._application.getApplicationName()
preferences_file = Resources.getPath(Resources.Preferences, "{}.cfg".format(preferences_file_name))
backup_preferences_file = os.path.join(version_data_dir, "{}.cfg".format(preferences_file_name))
if os.path.exists(preferences_file) and (not os.path.exists(backup_preferences_file) or not os.path.samefile(preferences_file, backup_preferences_file)):
Logger.log("d", "Copying preferences file from %s to %s", preferences_file, backup_preferences_file)
shutil.copyfile(preferences_file, backup_preferences_file)
# Create an empty buffer and write the archive to it.
buffer = io.BytesIO()
archive = self._makeArchive(buffer, version_data_dir)
if archive is None:
return
files = archive.namelist()
# Count the metadata items. We do this in a rather naive way at the moment.
machine_count = max(len([s for s in files if "machine_instances/" in s]) - 1, 0) # If people delete their profiles but not their preferences, it can still make a backup, and report -1 profiles. Server crashes on this.
material_count = max(len([s for s in files if "materials/" in s]) - 1, 0)
profile_count = max(len([s for s in files if "quality_changes/" in s]) - 1, 0)
plugin_count = len([s for s in files if "plugin.json" in s])
# Store the archive and metadata so the BackupManager can fetch them when needed.
self.zip_file = buffer.getvalue()
self.meta_data = {
"cura_release": cura_release,
"machine_count": str(machine_count),
"material_count": str(material_count),
"profile_count": str(profile_count),
"plugin_count": str(plugin_count)
}
def _makeArchive(self, buffer: "io.BytesIO", root_path: str) -> Optional[ZipFile]:
"""Make a full archive from the given root path with the given name.
:param root_path: The root directory to archive recursively.
:return: The archive as bytes.
"""
ignore_string = re.compile("|".join(self.IGNORED_FILES))
try:
archive = ZipFile(buffer, "w", ZIP_DEFLATED)
for root, folders, files in os.walk(root_path):
for item_name in folders + files:
absolute_path = os.path.join(root, item_name)
if ignore_string.search(absolute_path):
continue
archive.write(absolute_path, absolute_path[len(root_path) + len(os.sep):])
archive.close()
return archive
except (IOError, OSError, BadZipfile) as error:
Logger.log("e", "Could not create archive from user data directory: %s", error)
self._showMessage(
self.catalog.i18nc("@info:backup_failed",
"Could not create archive from user data directory: {}".format(error)))
return None
def _showMessage(self, message: str) -> None:
"""Show a UI message."""
Message(message, title=self.catalog.i18nc("@info:title", "Backup"), lifetime=30).show()
def restore(self) -> bool:
"""Restore this back-up.
:return: Whether we had success or not.
"""
if not self.zip_file or not self.meta_data or not self.meta_data.get("cura_release", None):
# We can restore without the minimum required information.
Logger.log("w", "Tried to restore a Cura backup without having proper data or meta data.")
self._showMessage(
self.catalog.i18nc("@info:backup_failed",
"Tried to restore a Cura backup without having proper data or meta data."))
return False
current_version = self._application.getVersion()
version_to_restore = self.meta_data.get("cura_release", "master")
if current_version < version_to_restore:
# Cannot restore version newer than current because settings might have changed.
Logger.log("d", "Tried to restore a Cura backup of version {version_to_restore} with cura version {current_version}".format(version_to_restore = version_to_restore, current_version = current_version))
self._showMessage(
self.catalog.i18nc("@info:backup_failed",
"Tried to restore a Cura backup that is higher than the current version."))
return False
version_data_dir = Resources.getDataStoragePath()
archive = ZipFile(io.BytesIO(self.zip_file), "r")
extracted = self._extractArchive(archive, version_data_dir)
# Under Linux, preferences are stored elsewhere, so we copy the file to there.
if Platform.isLinux():
preferences_file_name = self._application.getApplicationName()
preferences_file = Resources.getPath(Resources.Preferences, "{}.cfg".format(preferences_file_name))
backup_preferences_file = os.path.join(version_data_dir, "{}.cfg".format(preferences_file_name))
Logger.log("d", "Moving preferences file from %s to %s", backup_preferences_file, preferences_file)
shutil.move(backup_preferences_file, preferences_file)
return extracted
@staticmethod
def _extractArchive(archive: "ZipFile", target_path: str) -> bool:
"""Extract the whole archive to the given target path.
:param archive: The archive as ZipFile.
:param target_path: The target path.
:return: Whether we had success or not.
"""
# Implement security recommendations: Sanity check on zip files will make it harder to spoof.
from cura.CuraApplication import CuraApplication
config_filename = CuraApplication.getInstance().getApplicationName() + ".cfg" # Should be there if valid.
if config_filename not in [file.filename for file in archive.filelist]:
Logger.logException("e", "Unable to extract the backup due to corruption of compressed file(s).")
return False
Logger.log("d", "Removing current data in location: %s", target_path)
Resources.factoryReset()
Logger.log("d", "Extracting backup to location: %s", target_path)
try:
archive.extractall(target_path)
except (PermissionError, EnvironmentError):
Logger.logException("e", "Unable to extract the backup due to permission or file system errors.")
return False
return True
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