#!/usr/bin/env python # -*- coding: utf-8 -*- import os import magic import hashlib import shutil from twiggy import quick_setup, log import argparse class KittenGroomerError(Exception): def __init__(self, message): ''' Base KittenGroomer exception handler. ''' super(KittenGroomerError, self).__init__(message) self.message = message class ImplementationRequired(KittenGroomerError): ''' Implementation required error ''' pass class FileBase(object): def __init__(self, src_path, dst_path): ''' Contains base information for a file on the source USB key, initialised with expected src and dest path ''' self.src_path = src_path self.dst_path = dst_path self.log_details = {'filepath': self.src_path} self.log_string = '' a, self.extension = os.path.splitext(self.src_path) if os.path.islink(self.src_path): # magic will throw an IOError on a broken symlink self.mimetype = 'inode/symlink' else: mt = magic.from_file(self.src_path, mime=True) try: self.mimetype = mt.decode("utf-8") except: self.mimetype = mt if self.mimetype and '/' in self.mimetype: self.main_type, self.sub_type = self.mimetype.split('/') else: self.main_type = '' self.sub_type = '' def has_mimetype(self): if not self.main_type or not self.sub_type: self.log_details.update({'broken_mime': True}) return False return True def has_extension(self): if not self.extension: self.log_details.update({'no_extension': True}) return False return True def is_dangerous(self): if self.log_details.get('dangerous'): return True return False def is_symlink(self): if self.has_mimetype() and self.main_type == 'inode' and self.sub_type == 'symlink': self.log_details.update({'symlink': os.readlink(self.src_path)}) return True return False def add_log_details(self, key, value): ''' Add an entry in the log dictionary ''' self.log_details[key] = value def make_dangerous(self): ''' This file should be considered as dangerous and never run. Prepending and appending DANGEROUS to the destination file name avoid double-click of death ''' if self.is_dangerous(): # Already marked as dangerous, do nothing return self.log_details['dangerous'] = True path, filename = os.path.split(self.dst_path) self.dst_path = os.path.join(path, 'DANGEROUS_{}_DANGEROUS'.format(filename)) def make_unknown(self): ''' This file has an unknown type and it was not possible to take a decision. Theuser will have to decide what to do. Prepending UNKNOWN ''' if self.is_dangerous() or self.log_details.get('binary'): # Already marked as dangerous or binary, do nothing return self.log_details['unknown'] = True path, filename = os.path.split(self.dst_path) self.dst_path = os.path.join(path, 'UNKNOWN_{}'.format(filename)) def make_binary(self): ''' This file is a binary, and should probably not be run. Appending .bin avoir double click of death but the user will have to decide by itself. ''' if self.is_dangerous(): # Already marked as dangerous, do nothing return self.log_details['binary'] = True path, filename = os.path.split(self.dst_path) self.dst_path = os.path.join(path, '{}.bin'.format(filename)) def force_ext(self, ext): if not self.dst_path.endswith(ext): self.log_details['force_ext'] = True self.dst_path += ext class KittenGroomerBase(object): def __init__(self, root_src, root_dst, debug=False): ''' Setup the base options of the copy/convert setup ''' self.src_root_dir = root_src self.dst_root_dir = root_dst self.log_root_dir = os.path.join(self.dst_root_dir, 'logs') self._safe_rmtree(self.log_root_dir) self._safe_mkdir(self.log_root_dir) self.log_processing = os.path.join(self.log_root_dir, 'processing.log') self.log_content = os.path.join(self.log_root_dir, 'content.log') self.tree(self.src_root_dir) quick_setup(file=self.log_processing) self.log_name = log.name('files') self.ressources_path = os.path.join(os.path.abspath(os.path.dirname(__file__)), 'data') os.environ["PATH"] += os.pathsep + self.ressources_path self.cur_file = None self.debug = debug if self.debug: self.log_debug_err = os.path.join(self.log_root_dir, 'debug_stderr.log') self.log_debug_out = os.path.join(self.log_root_dir, 'debug_stdout.log') else: self.log_debug_err = os.devnull self.log_debug_out = os.devnull def _computehash(self, path): s = hashlib.sha1() with open(path, 'rb') as f: while True: buf = f.read(0x100000) if not buf: break s.update(buf) return s.hexdigest() def tree(self, base_dir, padding=' '): with open(self.log_content, 'a') as lf: lf.write('#' * 80 + '\n') lf.write('{}+- {}/\n'.format(padding, os.path.basename(os.path.abspath(base_dir)))) padding += '| ' files = sorted(os.listdir(base_dir)) for f in files: curpath = os.path.join(base_dir, f) if os.path.islink(curpath): lf.write('{}+-- {}\t- Symbolic link to {}\n'.format(padding, f, os.readlink(curpath))) elif os.path.isdir(curpath): self.tree(curpath, padding) elif os.path.isfile(curpath): lf.write('{}+-- {}\t- {}\n'.format(padding, f, self._computehash(curpath))) # ##### Helpers ##### def _safe_rmtree(self, directory): '''Remove a directory tree if it exists''' if os.path.exists(directory): shutil.rmtree(directory) def _safe_remove(self, filepath): '''Remove a file if it exists''' if os.path.exists(filepath): os.remove(filepath) def _safe_mkdir(self, directory): '''Make a directory if it does not exist''' if not os.path.exists(directory): os.makedirs(directory) def _safe_copy(self, src=None, dst=None): ''' Copy a file and create directory if needed''' if src is None: src = self.cur_file.src_path if dst is None: dst = self.cur_file.dst_path try: dst_path, filename = os.path.split(dst) self._safe_mkdir(dst_path) shutil.copy(src, dst) return True except Exception as e: # TODO: Logfile print(e) return False def _safe_metadata_split(self, ext): '''Create a separate file to hold this file's metadata''' dst = self.cur_file.dst_path try: if os.path.exists(self.cur_file.src_path+ext): raise KittenGroomerError("Cannot create split metadata file for \"" + self.cur_file.dst_path + "\", type '" + ext + "': File exists.") dst_path, filename = os.path.split(dst) self._safe_mkdir(dst_path) return open(dst+ext, 'w+') except Exception as e: # TODO: Logfile print(e) return False def _list_all_files(self, directory): ''' Generate an iterator over all the files in a directory tree''' for root, dirs, files in os.walk(directory): for filename in files: filepath = os.path.join(root, filename) yield filepath def _print_log(self): ''' Print log, should be called after each file. You probably want to reimplement it in the subclass ''' tmp_log = self.log_name.fields(**self.cur_file.log_details) tmp_log.info('It did a thing.') ####################### def processdir(self, src_dir=None, dst_dir=None): ''' Main function doing the work, you have to implement it yourself. ''' raise ImplementationRequired('You have to implement the result processdir.') def main(kg_implementation, description='Call the KittenGroomer implementation to do things on files present in the source directory to the destination directory'): parser = argparse.ArgumentParser(prog='KittenGroomer', description=description) parser.add_argument('-s', '--source', type=str, help='Source directory') parser.add_argument('-d', '--destination', type=str, help='Destination directory') args = parser.parse_args() kg = kg_implementation(args.source, args.destination) kg.processdir()