import os import hashlib import logging import zlib import argparse import sys import stat from datetime import datetime import msgpack from .chunkifier import chunkify from .cache import Cache, NS_ARCHIVES, NS_CHUNKS from .bandstore import BandStore from .helpers import location_validator, pretty_size, LevelFilter, \ uid2user, user2uid, gid2group, group2gid CHUNK_SIZE = 55001 class Archive(object): def __init__(self, store, cache, name=None): self.store = store self.cache = cache self.items = [] self.chunks = [] self.chunk_idx = {} if name: self.open(name) def open(self, name): id = self.cache.archives[name] data = self.store.get(NS_ARCHIVES, id) if hashlib.sha256(data).digest() != id: raise Exception('Archive hash did not match') archive = msgpack.unpackb(zlib.decompress(data)) self.items = archive['items'] self.name = archive['name'] self.chunks = archive['chunks'] for i, chunk in enumerate(archive['chunks']): self.chunk_idx[i] = chunk[0] def save(self, name): archive = { 'name': name, 'ts': datetime.utcnow().isoformat(), 'items': self.items, 'chunks': self.chunks } data = zlib.compress(msgpack.packb(archive)) self.id = hashlib.sha256(data).digest() self.store.put(NS_ARCHIVES, self.id, data) self.store.commit() def add_chunk(self, id, size): try: return self.chunk_idx[id] except KeyError: idx = len(self.chunks) self.chunks.append((id, size)) self.chunk_idx[id] = idx return idx def stats(self, cache): total_osize = 0 total_csize = 0 total_usize = 0 chunk_count = {} for item in self.items: if item['type'] == 'FILE': total_osize += item['size'] for idx in item['chunks']: id = self.chunk_idx[idx] chunk_count.setdefault(id, 0) chunk_count[id] += 1 for id, c in chunk_count.items(): count, size = cache.chunkmap[id] total_csize += size if c == count: total_usize += size return dict(osize=total_osize, csize=total_csize, usize=total_usize) def list(self): for item in self.items: print item['path'] def extract(self, dest=None): dest = dest or os.getcwdu() for item in self.items: assert item['path'][0] not in ('/', '\\', ':') path = os.path.join(dest, item['path'].decode('utf-8')) if item['type'] == 'DIRECTORY': logging.info(path) if not os.path.exists(path): os.makedirs(path) elif item['type'] == 'SYMLINK': logging.info('%s => %s', path, item['source']) if not os.path.exists(os.path.dirname(path)): os.makedirs(os.path.dirname(path)) os.symlink(item['source'], path) elif item['type'] == 'FILE': logging.info(path) if not os.path.exists(os.path.dirname(path)): os.makedirs(os.path.dirname(path)) with open(path, 'wb') as fd: for chunk in item['chunks']: id = self.chunk_idx[chunk] data = self.store.get(NS_CHUNKS, id) cid = data[:32] data = data[32:] if hashlib.sha256(data).digest() != cid: raise Exception('Invalid chunk checksum') data = zlib.decompress(data) fd.write(data) os.chmod(path, item['mode']) uid = user2uid(item['user']) or item['uid'] gid = group2gid(item['group']) or item['gid'] try: os.chown(path, uid, gid) except OSError: pass os.utime(path, (item['ctime'], item['mtime'])) def verify(self): for item in self.items: if item['type'] == 'FILE': item['path'] = item['path'].decode('utf-8') for chunk in item['chunks']: id = self.chunk_idx[chunk] data = self.store.get(NS_CHUNKS, id) data = self.store.get(NS_CHUNKS, id) cid = data[:32] data = data[32:] if (hashlib.sha256(data).digest() != cid): logging.error('%s ... ERROR', item['path']) break else: logging.info('%s ... OK', item['path']) def delete(self, cache): self.store.delete(NS_ARCHIVES, self.cache.archives[self.name]) for item in self.items: if item['type'] == 'FILE': for c in item['chunks']: id = self.chunk_idx[c] cache.chunk_decref(id) self.store.commit() del cache.archives[self.name] cache.save() def walk(self, path): st = os.lstat(path) if stat.S_ISDIR(st.st_mode): for f in os.listdir(path): for x in self.walk(os.path.join(path, f)): yield x else: yield path, st def create(self, name, paths, cache): if name in cache.archives: raise NameError('Archive already exists') for path in paths: for path, st in self.walk(unicode(path)): if stat.S_ISDIR(st.st_mode): self.process_dir(path, st) elif stat.S_ISLNK(st.st_mode): self.process_link(path, st) elif stat.S_ISREG(st.st_mode): self.process_file(path, st) else: logging.error('Unknown file type: %s', path) self.save(name) cache.archives[name] = self.id cache.save() def process_dir(self, path, st): path = path.lstrip('/\\:') logging.info(path) self.items.append({'type': 'DIRECTORY', 'path': path}) def process_link(self, path, st): source = os.readlink(path) path = path.lstrip('/\\:') logging.info('%s => %s', path, source) self.items.append({'type': 'SYMLINK', 'path': path, 'source': source}) def process_file(self, path, st): try: fd = open(path, 'rb') except IOError, e: logging.error(e) return with fd: path = path.lstrip('/\\:') logging.info(path) chunks = [] size = 0 for chunk in chunkify(fd, CHUNK_SIZE, 30): size += len(chunk) chunks.append(self.add_chunk(*self.cache.add_chunk(chunk))) self.items.append({ 'type': 'FILE', 'path': path, 'chunks': chunks, 'size': size, 'mode': st.st_mode, 'uid': st.st_uid, 'user': uid2user(st.st_uid), 'gid': st.st_gid, 'group': gid2group(st.st_gid), 'ctime': st.st_ctime, 'mtime': st.st_mtime, }) class Archiver(object): def open_store(self, location): store = BandStore(location.path) cache = Cache(store) return store, cache def exit_code_from_logger(self): if not self.level_filter.count.get('ERROR'): return 0 else: return 1 def do_create(self, args): store, cache = self.open_store(args.archive) archive = Archive(store, cache) archive.create(args.archive.archive, args.paths, cache) return self.exit_code_from_logger() def do_extract(self, args): store, cache = self.open_store(args.archive) archive = Archive(store, cache, args.archive.archive) archive.extract(args.dest) return self.exit_code_from_logger() def do_delete(self, args): store, cache = self.open_store(args.archive) archive = Archive(store, cache, args.archive.archive) archive.delete(cache) return self.exit_code_from_logger() def do_list(self, args): store, cache = self.open_store(args.src) if args.src.archive: archive = Archive(store, cache, args.src.archive) archive.list() else: for archive in sorted(cache.archives): print archive return self.exit_code_from_logger() def do_verify(self, args): store, cache = self.open_store(args.archive) archive = Archive(store, cache, args.archive.archive) archive.verify() return self.exit_code_from_logger() def do_info(self, args): store, cache = self.open_store(args.archive) archive = Archive(store, cache, args.archive.archive) stats = archive.stats(cache) print 'Original size:', pretty_size(stats['osize']) print 'Compressed size:', pretty_size(stats['csize']) print 'Unique data:', pretty_size(stats['usize']) return self.exit_code_from_logger() def run(self, args=None): parser = argparse.ArgumentParser(description='Dedupestore') parser.add_argument('-v', '--verbose', dest='verbose', action='store_true', default=False, help='Verbose output') subparsers = parser.add_subparsers(title='Available subcommands') subparser = subparsers.add_parser('create') subparser.set_defaults(func=self.do_create) subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True), help='Archive to create') subparser.add_argument('paths', metavar='PATH', nargs='+', type=str, help='Paths to add to archive') subparser = subparsers.add_parser('extract') subparser.set_defaults(func=self.do_extract) subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True), help='Archive to create') subparser.add_argument('dest', metavar='DEST', type=str, nargs='?', help='Where to extract files') subparser = subparsers.add_parser('delete') subparser.set_defaults(func=self.do_delete) subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True), help='Archive to delete') subparser = subparsers.add_parser('list') subparser.set_defaults(func=self.do_list) subparser.add_argument('src', metavar='SRC', type=location_validator(), help='Store/Archive to list contents of') subparser= subparsers.add_parser('verify') subparser.set_defaults(func=self.do_verify) subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True), help='Archive to verity integrity of') subparser= subparsers.add_parser('info') subparser.set_defaults(func=self.do_info) subparser.add_argument('archive', metavar='ARCHIVE', type=location_validator(archive=True), help='Archive to display information about') args = parser.parse_args(args) if args.verbose: logging.basicConfig(level=logging.INFO, format='%(message)s') else: logging.basicConfig(level=logging.WARNING, format='%(message)s') self.level_filter = LevelFilter() logging.getLogger('').addFilter(self.level_filter) return args.func(args) def main(): archiver = Archiver() sys.exit(archiver.run()) if __name__ == '__main__': main()