import sqlite3 import os import json import logging from lbryschema.decode import smart_decode from lbrynet import conf log = logging.getLogger(__name__) download_directory = conf.settings['download_directory'] CREATE_TABLES_QUERY = """ pragma foreign_keys=on; pragma journal_mode=WAL; create table if not exists blob ( blob_hash char(96) primary key not null, blob_length integer not null, next_announce_time integer not null, should_announce integer not null default 0, status text not null ); create table if not exists stream ( stream_hash char(96) not null primary key, sd_hash char(96) not null references blob, stream_key text not null, stream_name text not null, suggested_filename text not null ); create table if not exists stream_blob ( stream_hash char(96) not null references stream, blob_hash char(96) references blob, position integer not null, iv char(32) not null, primary key (stream_hash, blob_hash) ); create table if not exists claim ( claim_outpoint text not null primary key, claim_id char(40) not null, claim_name text not null, amount integer not null, height integer not null, serialized_metadata blob not null, channel_claim_id text, address text not null, claim_sequence integer not null ); create table if not exists file ( stream_hash text primary key not null references stream, file_name text not null, download_directory text not null, blob_data_rate real not null, status text not null ); create table if not exists content_claim ( stream_hash text unique not null references file, claim_outpoint text not null references claim, primary key (stream_hash, claim_outpoint) ); create table if not exists support ( support_outpoint text not null primary key, claim_id text not null, amount integer not null, address text not null ); """ def run_operation(db): def _decorate(fn): def _wrapper(*args): cursor = db.cursor() try: result = fn(cursor, *args) db.commit() return result except sqlite3.IntegrityError: db.rollback() raise return _wrapper return _decorate def verify_sd_blob(sd_hash, blob_dir): with open(os.path.join(blob_dir, sd_hash), "r") as sd_file: data = sd_file.read() sd_length = len(data) decoded = json.loads(data) assert set(decoded.keys()) == { 'stream_name', 'blobs', 'stream_type', 'key', 'suggested_file_name', 'stream_hash' }, "invalid sd blob" for blob in sorted(decoded['blobs'], key=lambda x: int(x['blob_num']), reverse=True): if blob['blob_num'] == len(decoded['blobs']) - 1: assert {'length', 'blob_num', 'iv'} == set(blob.keys()), 'invalid stream terminator' assert blob['length'] == 0, 'non zero length stream terminator' else: assert {'blob_hash', 'length', 'blob_num', 'iv'} == set(blob.keys()), 'invalid stream blob' assert blob['length'] > 0, 'zero length stream blob' return decoded, sd_length def do_migration(db_dir): new_db_path = os.path.join(db_dir, "lbrynet.sqlite") connection = sqlite3.connect(new_db_path) metadata_db = sqlite3.connect(os.path.join(db_dir, "blockchainname.db")) lbryfile_db = sqlite3.connect(os.path.join(db_dir, 'lbryfile_info.db')) blobs_db = sqlite3.connect(os.path.join(db_dir, 'blobs.db')) name_metadata_cursor = metadata_db.cursor() lbryfile_cursor = lbryfile_db.cursor() blobs_db_cursor = blobs_db.cursor() old_rowid_to_outpoint = { rowid: (txid, nout) for (rowid, txid, nout) in lbryfile_cursor.execute("select * from lbry_file_metadata").fetchall() } old_sd_hash_to_outpoint = { sd_hash: (txid, nout) for (txid, nout, sd_hash) in name_metadata_cursor.execute("select txid, n, sd_hash from name_metadata").fetchall() } sd_hash_to_stream_hash = { sd_hash: stream_hash for (sd_hash, stream_hash) in lbryfile_cursor.execute("select sd_blob_hash, stream_hash from lbry_file_descriptors").fetchall() } stream_hash_to_stream_blobs = {} for (blob_hash, stream_hash, position, iv, length) in lbryfile_db.execute( "select * from lbry_file_blobs").fetchall(): stream_blobs = stream_hash_to_stream_blobs.get(stream_hash, []) stream_blobs.append((blob_hash, length, position, iv)) stream_hash_to_stream_blobs[stream_hash] = stream_blobs claim_outpoint_queries = {} for claim_query in metadata_db.execute( "select distinct c.txid, c.n, c.claimId, c.name, claim_cache.claim_sequence, claim_cache.claim_address, " "claim_cache.height, claim_cache.amount, claim_cache.claim_pb " "from claim_cache inner join claim_ids c on claim_cache.claim_id=c.claimId"): txid, nout = claim_query[0], claim_query[1] if (txid, nout) in claim_outpoint_queries: continue claim_outpoint_queries[(txid, nout)] = claim_query @run_operation(connection) def _populate_blobs(transaction, blob_infos): transaction.executemany( "insert into blob values (?, ?, ?, ?, ?)", [(blob_hash, blob_length, int(next_announce_time), should_announce, "finished") for (blob_hash, blob_length, _, next_announce_time, should_announce) in blob_infos] ) @run_operation(connection) def _import_file(transaction, sd_hash, stream_hash, key, stream_name, suggested_file_name, data_rate, status, stream_blobs): try: transaction.execute( "insert or ignore into stream values (?, ?, ?, ?, ?)", (stream_hash, sd_hash, key, stream_name, suggested_file_name) ) except sqlite3.IntegrityError: # failed because the sd isn't a known blob, we'll try to read the blob file and recover it return sd_hash # insert any stream blobs that were missing from the blobs table transaction.executemany( "insert or ignore into blob values (?, ?, ?, ?, ?)", [ (blob_hash, length, 0, 0, "pending") for (blob_hash, length, position, iv) in stream_blobs ] ) # insert the stream blobs for blob_hash, length, position, iv in stream_blobs: transaction.execute( "insert or ignore into stream_blob values (?, ?, ?, ?)", (stream_hash, blob_hash, position, iv) ) # insert the file transaction.execute( "insert or ignore into file values (?, ?, ?, ?, ?)", (stream_hash, stream_name, download_directory.encode('hex'), data_rate, status) ) @run_operation(connection) def _add_recovered_blobs(transaction, blob_infos, sd_hash, sd_length): transaction.execute( "insert or replace into blob values (?, ?, ?, ?, ?)", (sd_hash, sd_length, 0, 1, "finished") ) for blob in sorted(blob_infos, key=lambda x: x['blob_num'], reverse=True): if blob['blob_num'] < len(blob_infos) - 1: transaction.execute( "insert or ignore into blob values (?, ?, ?, ?, ?)", (blob['blob_hash'], blob['length'], 0, 0, "pending") ) @run_operation(connection) def _make_db(new_db): # create the new tables new_db.executescript(CREATE_TABLES_QUERY) # first migrate the blobs blobs = blobs_db_cursor.execute("select * from blobs").fetchall() _populate_blobs(blobs) # pylint: disable=no-value-for-parameter log.info("migrated %i blobs", new_db.execute("select count(*) from blob").fetchone()[0]) # used to store the query arguments if we need to try re-importing the lbry file later file_args = {} # : args tuple file_outpoints = {} # : sd_hash # get the file and stream queries ready for (rowid, sd_hash, stream_hash, key, stream_name, suggested_file_name, data_rate, status) in \ lbryfile_db.execute( "select distinct lbry_files.rowid, d.sd_blob_hash, lbry_files.*, o.blob_data_rate, o.status " "from lbry_files " "inner join lbry_file_descriptors d on lbry_files.stream_hash=d.stream_hash " "inner join lbry_file_options o on lbry_files.stream_hash=o.stream_hash"): # this is try to link the file to a content claim after we've imported all the files if rowid in old_rowid_to_outpoint: file_outpoints[old_rowid_to_outpoint[rowid]] = sd_hash elif sd_hash in old_sd_hash_to_outpoint: file_outpoints[old_sd_hash_to_outpoint[sd_hash]] = sd_hash sd_hash_to_stream_hash[sd_hash] = stream_hash if stream_hash in stream_hash_to_stream_blobs: file_args[sd_hash] = ( sd_hash, stream_hash, key, stream_name, suggested_file_name, data_rate or 0.0, status, stream_hash_to_stream_blobs.pop(stream_hash) ) # used to store the query arguments if we need to try re-importing the claim claim_queries = {} # : claim query tuple # get the claim queries ready, only keep those with associated files for outpoint, sd_hash in file_outpoints.iteritems(): if outpoint in claim_outpoint_queries: claim_queries[sd_hash] = claim_outpoint_queries[outpoint] # insert the claims new_db.executemany( "insert or ignore into claim values (?, ?, ?, ?, ?, ?, ?, ?, ?)", [ ( "%s:%i" % (claim_arg_tup[0], claim_arg_tup[1]), claim_arg_tup[2], claim_arg_tup[3], claim_arg_tup[7], claim_arg_tup[6], claim_arg_tup[8], smart_decode(claim_arg_tup[8]).certificate_id, claim_arg_tup[5], claim_arg_tup[4] ) for sd_hash, claim_arg_tup in claim_queries.iteritems() if claim_arg_tup ] # sd_hash, (txid, nout, claim_id, name, sequence, address, height, amount, serialized) ) log.info("migrated %i claims", new_db.execute("select count(*) from claim").fetchone()[0]) damaged_stream_sds = [] # import the files and get sd hashes of streams to attempt recovering for sd_hash, file_query in file_args.iteritems(): failed_sd = _import_file(*file_query) if failed_sd: damaged_stream_sds.append(failed_sd) # recover damaged streams if damaged_stream_sds: blob_dir = os.path.join(db_dir, "blobfiles") damaged_sds_on_disk = [] if not os.path.isdir(blob_dir) else list({p for p in os.listdir(blob_dir) if p in damaged_stream_sds}) for damaged_sd in damaged_sds_on_disk: try: decoded, sd_length = verify_sd_blob(damaged_sd, blob_dir) blobs = decoded['blobs'] _add_recovered_blobs(blobs, damaged_sd, sd_length) # pylint: disable=no-value-for-parameter _import_file(*file_args[damaged_sd]) damaged_stream_sds.remove(damaged_sd) except (OSError, ValueError, TypeError, IOError, AssertionError, sqlite3.IntegrityError): continue log.info("migrated %i files", new_db.execute("select count(*) from file").fetchone()[0]) # associate the content claims to their respective files for claim_arg_tup in claim_queries.values(): if claim_arg_tup and (claim_arg_tup[0], claim_arg_tup[1]) in file_outpoints \ and file_outpoints[(claim_arg_tup[0], claim_arg_tup[1])] in sd_hash_to_stream_hash: try: new_db.execute( "insert or ignore into content_claim values (?, ?)", ( sd_hash_to_stream_hash.get(file_outpoints.get((claim_arg_tup[0], claim_arg_tup[1]))), "%s:%i" % (claim_arg_tup[0], claim_arg_tup[1]) ) ) except sqlite3.IntegrityError: continue log.info("migrated %i content claims", new_db.execute("select count(*) from content_claim").fetchone()[0]) try: _make_db() # pylint: disable=no-value-for-parameter except sqlite3.OperationalError as err: if err.message == "table blob has 7 columns but 5 values were supplied": log.warning("detected a failed previous migration to revision 6, repairing it") connection.close() os.remove(new_db_path) return do_migration(db_dir) raise err connection.close() blobs_db.close() lbryfile_db.close() metadata_db.close() # os.remove(os.path.join(db_dir, "blockchainname.db")) # os.remove(os.path.join(db_dir, 'lbryfile_info.db')) # os.remove(os.path.join(db_dir, 'blobs.db'))