import os import hashlib import zlib import cPickle from optparse import OptionParser from chunkifier import chunkify from cache import Cache, NS_ARCHIVES, NS_CHUNKS #from sqlitestore import SqliteStore from bandstore import BandStore CHUNK_SIZE = 55001 class Archive(object): def __init__(self, store, name=None): self.store = store self.items = [] self.chunks = [] self.chunk_idx = {} if name: self.open(name) def add_chunk(self, id, csize, osize): try: return self.chunk_idx[id] except KeyError: idx = len(self.chunks) self.chunks.append((id, csize, osize)) self.chunk_idx[id] = idx return idx def open(self, name): archive = cPickle.loads(zlib.decompress(self.store.get(NS_ARCHIVES, name))) self.items = archive['items'] self.name = archive['name'] self.chunks = archive['chunks'] for i, (id, csize, osize) in enumerate(archive['chunks']): self.chunk_idx[i] = id def save(self, name): archive = {'name': name, 'items': self.items, 'chunks': self.chunks} self.store.put(NS_ARCHIVES, name, zlib.compress(cPickle.dumps(archive))) self.store.commit() 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, csize, osize = cache.chunkmap[id] total_csize += csize if c == count: total_usize += csize 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): for item in self.items: assert item['path'][0] not in ('/', '\\', ':') print item['path'] if item['type'] == 'DIR': if not os.path.exists(item['path']): os.makedirs(item['path']) if item['type'] == 'FILE': path = item['path'] if not os.path.exists(os.path.dirname(path)): os.makedirs(os.path.dirname(path)) with open(item['path'], 'wb') as fd: for chunk in item['chunks']: id = self.chunk_idx[chunk] data = self.store.get(NS_CHUNKS, id) if hashlib.sha1(data).digest() != id: raise Exception('Invalid chunk checksum') fd.write(zlib.decompress(data)) def verify(self): for item in self.items: if item['type'] == 'FILE': print item['path'], '...', for chunk in item['chunks']: id = self.chunk_idx[chunk] data = self.store.get(NS_CHUNKS, id) if hashlib.sha1(data).digest() != id: print 'ERROR' break else: print 'OK' def delete(self, cache): self.store.delete(NS_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() cache.archives.remove(self.name) cache.save() def create(self, name, paths, cache): for path in paths: for root, dirs, files in os.walk(path): for d in dirs: p = os.path.join(root, d) print p self.items.append(self.process_dir(p, cache)) for f in files: p = os.path.join(root, f) print p self.items.append(self.process_file(p, cache)) self.save(name) cache.archives.append(name) cache.save() def process_dir(self, path, cache): path = path.lstrip('/\\:') return {'type': 'DIR', 'path': path} def process_file(self, path, cache): with open(path, 'rb') as fd: path = path.lstrip('/\\:') chunks = [] size = 0 for chunk in chunkify(fd, CHUNK_SIZE, 30): size += len(chunk) chunks.append(self.add_chunk(*cache.add_chunk(chunk))) return {'type': 'FILE', 'path': path, 'chunks': chunks, 'size': size} class Archiver(object): def pretty_size(self, v): if v > 1024 * 1024 * 1024: return '%.2f GB' % (v / 1024. / 1024. / 1024.) elif v > 1024 * 1024: return '%.2f MB' % (v / 1024. / 1024.) elif v > 1024: return '%.2f kB' % (v / 1024.) else: return str(v) def create_archive(self, name, paths): archive = Archive(self.store) archive.create(name, paths, self.cache) def delete_archive(self, archive_name): archive = Archive(self.store, archive_name) archive.delete(self.cache) def list_archives(self): print 'Archives:' for archive in sorted(self.cache.archives): print archive def list_archive(self, archive_name): archive = Archive(self.store, archive_name) archive.list() def verify_archive(self, archive_name): archive = Archive(self.store, archive_name) archive.verify() def extract_archive(self, archive_name): archive = Archive(self.store, archive_name) archive.extract() def archive_stats(self, archive_name): archive = Archive(self.store, archive_name) stats = archive.stats(self.cache) print 'Original size:', self.pretty_size(stats['osize']) print 'Compressed size:', self.pretty_size(stats['csize']) print 'Unique data:', self.pretty_size(stats['usize']) def run(self): parser = OptionParser() parser.add_option("-s", "--store", dest="store", help="path to dedupe store", metavar="STORE") parser.add_option("-c", "--create", dest="create_archive", help="create ARCHIVE", metavar="ARCHIVE") parser.add_option("-d", "--delete", dest="delete_archive", help="delete ARCHIVE", metavar="ARCHIVE") parser.add_option("-l", "--list-archives", dest="list_archives", action="store_true", default=False, help="list archives") parser.add_option("-V", "--verify", dest="verify_archive", help="verify archive consistency") parser.add_option("-e", "--extract", dest="extract_archive", help="extract ARCHIVE") parser.add_option("-L", "--list-archive", dest="list_archive", help="verify archive consistency", metavar="ARCHIVE") parser.add_option("-S", "--stats", dest="archive_stats", help="Display archive statistics", metavar="ARCHIVE") (options, args) = parser.parse_args() if options.store: self.store = BandStore(options.store) else: parser.error('No store path specified') self.cache = Cache(self.store) if options.list_archives: self.list_archives() elif options.list_archive: self.list_archive(options.list_archive) elif options.verify_archive: self.verify_archive(options.verify_archive) elif options.extract_archive: self.extract_archive(options.extract_archive) elif options.delete_archive: self.delete_archive(options.delete_archive) elif options.create_archive: self.create_archive(options.create_archive, args) elif options.archive_stats: self.archive_stats(options.archive_stats) def main(): archiver = Archiver() archiver.run() if __name__ == '__main__': main()