lbry-sdk/lbrynet/extras/daemon/migrator/migrate8to9.py

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import sqlite3
import logging
import os
from lbrynet.p2p.Error import InvalidStreamDescriptorError
from lbrynet.p2p.StreamDescriptor import EncryptedFileStreamType, format_sd_info, format_blobs, validate_descriptor
from lbrynet.cryptstream.CryptBlob import CryptBlobInfo
log = logging.getLogger(__name__)
def do_migration(db_dir):
db_path = os.path.join(db_dir, "lbrynet.sqlite")
blob_dir = os.path.join(db_dir, "blobfiles")
connection = sqlite3.connect(db_path)
cursor = connection.cursor()
query = "select stream_name, stream_key, suggested_filename, sd_hash, stream_hash from stream"
streams = cursor.execute(query).fetchall()
blobs = cursor.execute("select s.stream_hash, s.position, s.iv, b.blob_hash, b.blob_length from stream_blob s "
"left outer join blob b ON b.blob_hash=s.blob_hash order by s.position").fetchall()
blobs_by_stream = {}
for stream_hash, position, iv, blob_hash, blob_length in blobs:
blobs_by_stream.setdefault(stream_hash, []).append(CryptBlobInfo(blob_hash, position, blob_length or 0, iv))
for stream_name, stream_key, suggested_filename, sd_hash, stream_hash in streams:
sd_info = format_sd_info(
EncryptedFileStreamType, stream_name, stream_key,
suggested_filename, stream_hash, format_blobs(blobs_by_stream[stream_hash])
)
try:
validate_descriptor(sd_info)
except InvalidStreamDescriptorError as err:
log.warning("Stream for descriptor %s is invalid (%s), cleaning it up",
sd_hash, err.message)
blob_hashes = [blob.blob_hash for blob in blobs_by_stream[stream_hash]]
delete_stream(cursor, stream_hash, sd_hash, blob_hashes, blob_dir)
connection.commit()
connection.close()
def delete_stream(transaction, stream_hash, sd_hash, blob_hashes, blob_dir):
transaction.execute("delete from content_claim where stream_hash=? ", (stream_hash,))
transaction.execute("delete from file where stream_hash=? ", (stream_hash, ))
transaction.execute("delete from stream_blob where stream_hash=?", (stream_hash, ))
transaction.execute("delete from stream where stream_hash=? ", (stream_hash, ))
transaction.execute("delete from blob where blob_hash=?", (sd_hash, ))
for blob_hash in blob_hashes:
transaction.execute("delete from blob where blob_hash=?", (blob_hash, ))
file_path = os.path.join(blob_dir, blob_hash)
if os.path.isfile(file_path):
os.unlink(file_path)