lbry-sdk/lbrynet/stream/managed_stream.py

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import os
import asyncio
import typing
import logging
from lbrynet.extras.daemon.mime_types import guess_media_type
from lbrynet.stream.downloader import StreamDownloader
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from lbrynet.stream.descriptor import StreamDescriptor
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if typing.TYPE_CHECKING:
from lbrynet.extras.daemon.storage import StoredStreamClaim
from lbrynet.blob.blob_manager import BlobFileManager
log = logging.getLogger(__name__)
class ManagedStream:
STATUS_RUNNING = "running"
STATUS_STOPPED = "stopped"
STATUS_FINISHED = "finished"
def __init__(self, loop: asyncio.BaseEventLoop, blob_manager: 'BlobFileManager', descriptor: 'StreamDescriptor',
download_directory: str, file_name: str, downloader: typing.Optional[StreamDownloader] = None,
status: typing.Optional[str] = STATUS_STOPPED, claim: typing.Optional['StoredStreamClaim'] = None):
self.loop = loop
self.blob_manager = blob_manager
self.download_directory = download_directory
self.file_name = file_name
self.descriptor = descriptor
self.downloader = downloader
self.stream_hash = descriptor.stream_hash
self.stream_claim_info = claim
self._status = status
self._store_after_finished: asyncio.Task = None
@property
def status(self) -> str:
return self._status
def update_status(self, status: str):
assert status in [self.STATUS_RUNNING, self.STATUS_STOPPED, self.STATUS_FINISHED]
self._status = status
@property
def finished(self) -> bool:
return self.status == self.STATUS_FINISHED
@property
def running(self) -> bool:
return self.status == self.STATUS_RUNNING
@property
def claim_id(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.claim_id
@property
def txid(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.txid
@property
def nout(self) -> typing.Optional[int]:
return None if not self.stream_claim_info else self.stream_claim_info.nout
@property
def outpoint(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.outpoint
@property
def claim_height(self) -> typing.Optional[int]:
return None if not self.stream_claim_info else self.stream_claim_info.height
@property
def channel_claim_id(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.channel_claim_id
@property
def channel_name(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.channel_name
@property
def claim_name(self) -> typing.Optional[str]:
return None if not self.stream_claim_info else self.stream_claim_info.claim_name
@property
def metadata(self) ->typing.Optional[typing.Dict]:
return None if not self.stream_claim_info else self.stream_claim_info.claim.claim_dict['stream']['metadata']
@property
def blobs_completed(self) -> int:
return sum([1 if self.blob_manager.get_blob(b.blob_hash).get_is_verified() else 0
for b in self.descriptor.blobs[:-1]])
@property
def blobs_in_stream(self) -> int:
return len(self.descriptor.blobs) - 1
@property
def sd_hash(self):
return self.descriptor.sd_hash
def as_dict(self) -> typing.Dict:
full_path = os.path.join(self.download_directory, self.file_name)
if not os.path.exists(full_path):
full_path = None
mime_type = guess_media_type(os.path.basename(self.file_name))
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if self.downloader:
written_bytes = self.downloader.written_bytes
elif full_path:
written_bytes = os.stat(full_path).st_size
else:
written_bytes = None
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return {
'completed': self.finished,
'file_name': self.file_name,
'download_directory': self.download_directory,
'points_paid': 0.0,
'stopped': not self.running,
'stream_hash': self.stream_hash,
'stream_name': self.descriptor.stream_name,
'suggested_file_name': self.descriptor.suggested_file_name,
'sd_hash': self.descriptor.sd_hash,
'download_path': full_path,
'mime_type': mime_type,
'key': self.descriptor.key,
'total_bytes_lower_bound': self.descriptor.lower_bound_decrypted_length(),
'total_bytes': self.descriptor.upper_bound_decrypted_length(),
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'written_bytes': written_bytes,
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'blobs_completed': self.blobs_completed,
'blobs_in_stream': self.blobs_in_stream,
'status': self.status,
'claim_id': self.claim_id,
'txid': self.txid,
'nout': self.nout,
'outpoint': self.outpoint,
'metadata': self.metadata,
'channel_claim_id': self.channel_claim_id,
'channel_name': self.channel_name,
'claim_name': self.claim_name
}
@classmethod
async def create(cls, loop: asyncio.BaseEventLoop, blob_manager: 'BlobFileManager',
file_path: str) -> 'ManagedStream':
descriptor = await StreamDescriptor.create_stream(
loop, blob_manager.blob_dir, file_path
)
sd_blob = blob_manager.get_blob(descriptor.sd_hash)
await blob_manager.blob_completed(sd_blob)
await blob_manager.storage.store_stream(
blob_manager.get_blob(descriptor.sd_hash), descriptor
)
return cls(loop, blob_manager, descriptor, os.path.dirname(file_path), os.path.basename(file_path),
status=cls.STATUS_FINISHED)
async def stop_download(self):
if self.downloader:
await self.downloader.stop()
if not self.finished:
self.update_status(self.STATUS_STOPPED)