forked from LBRYCommunity/lbry-sdk
85 lines
3.4 KiB
Python
85 lines
3.4 KiB
Python
import typing
|
|
import asyncio
|
|
import logging
|
|
from sqlite3 import IntegrityError
|
|
from lbrynet.extras.daemon.storage import SQLiteStorage
|
|
from lbrynet.blob.blob_file import BlobFile
|
|
from lbrynet.stream.descriptor import StreamDescriptor
|
|
|
|
if typing.TYPE_CHECKING:
|
|
from lbrynet.dht.protocol.data_store import DictDataStore
|
|
|
|
log = logging.getLogger(__name__)
|
|
|
|
|
|
class BlobFileManager:
|
|
def __init__(self, loop: asyncio.BaseEventLoop, blob_dir: str, storage: SQLiteStorage,
|
|
node_data_store: typing.Optional['DictDataStore'] = None):
|
|
"""
|
|
This class stores blobs on the hard disk
|
|
|
|
blob_dir - directory where blobs are stored
|
|
storage - SQLiteStorage object
|
|
"""
|
|
self.loop = loop
|
|
self.blob_dir = blob_dir
|
|
self.storage = storage
|
|
self._node_data_store = node_data_store
|
|
self.completed_blob_hashes: typing.Set[str] = set() if not self._node_data_store\
|
|
else self._node_data_store.completed_blobs
|
|
self.blobs: typing.Dict[str, BlobFile] = {}
|
|
|
|
async def setup(self) -> bool:
|
|
raw_blob_hashes = await self.get_all_verified_blobs()
|
|
self.completed_blob_hashes.update(raw_blob_hashes)
|
|
return True
|
|
|
|
def get_blob(self, blob_hash, length: typing.Optional[int] = None):
|
|
if blob_hash in self.blobs:
|
|
if length and self.blobs[blob_hash].length is None:
|
|
self.blobs[blob_hash].set_length(length)
|
|
else:
|
|
self.blobs[blob_hash] = BlobFile(self.loop, self.blob_dir, blob_hash, length, self.blob_completed)
|
|
return self.blobs[blob_hash]
|
|
|
|
def get_stream_descriptor(self, sd_hash):
|
|
return StreamDescriptor.from_stream_descriptor_blob(self.loop, self.blob_dir, self.get_blob(sd_hash))
|
|
|
|
async def blob_completed(self, blob: BlobFile):
|
|
if blob.blob_hash is None:
|
|
raise Exception("Blob hash is None")
|
|
if not blob.length:
|
|
raise Exception("Blob has a length of 0")
|
|
if blob.blob_hash not in self.completed_blob_hashes:
|
|
self.completed_blob_hashes.add(blob.blob_hash)
|
|
await self.storage.add_completed_blob(blob.blob_hash)
|
|
|
|
def check_completed_blobs(self, blob_hashes: typing.List[str]) -> typing.List[str]:
|
|
"""Returns of the blobhashes_to_check, which are valid"""
|
|
blobs = [self.get_blob(b) for b in blob_hashes]
|
|
return [blob.blob_hash for blob in blobs if blob.get_is_verified()]
|
|
|
|
async def get_all_verified_blobs(self) -> typing.List[str]:
|
|
blob_hashes = await self.storage.get_all_blob_hashes()
|
|
return self.check_completed_blobs(blob_hashes)
|
|
|
|
async def delete_blobs(self, blob_hashes: typing.List[str]):
|
|
bh_to_delete_from_db = []
|
|
for blob_hash in blob_hashes:
|
|
if not blob_hash:
|
|
continue
|
|
try:
|
|
blob = self.get_blob(blob_hash)
|
|
await blob.delete()
|
|
bh_to_delete_from_db.append(blob_hash)
|
|
except Exception as e:
|
|
log.warning("Failed to delete blob file. Reason: %s", e)
|
|
if blob_hash in self.completed_blob_hashes:
|
|
self.completed_blob_hashes.remove(blob_hash)
|
|
if blob_hash in self.blobs:
|
|
del self.blobs[blob_hash]
|
|
try:
|
|
await self.storage.delete_blobs_from_db(bh_to_delete_from_db)
|
|
except IntegrityError as err:
|
|
if str(err) != "FOREIGN KEY constraint failed":
|
|
raise err
|