197 lines
6.8 KiB
Python
197 lines
6.8 KiB
Python
import hashlib
|
|
import logging
|
|
import os
|
|
import stat
|
|
import time
|
|
from queue import Empty, Queue
|
|
from threading import Thread
|
|
from typing import Optional
|
|
|
|
from libretime_api_client.v2 import ApiClient
|
|
from requests.exceptions import ConnectionError, HTTPError, Timeout
|
|
|
|
from .events import FileEvent, FileEvents
|
|
|
|
logger = logging.getLogger(__name__)
|
|
|
|
|
|
class PypoFile(Thread):
|
|
name = "file"
|
|
daemon = True
|
|
|
|
file_events_queue: Queue[FileEvents]
|
|
file_events: FileEvents
|
|
|
|
def __init__(
|
|
self,
|
|
file_queue: Queue[FileEvents],
|
|
api_client: ApiClient,
|
|
):
|
|
Thread.__init__(self)
|
|
self.file_events_queue = file_queue
|
|
self.file_events = {}
|
|
self.api_client = api_client
|
|
|
|
def copy_file(self, file_event: FileEvent):
|
|
"""
|
|
Copy file_event from local library directory to local cache directory.
|
|
"""
|
|
file_id = file_event["id"]
|
|
dst = file_event["dst"]
|
|
|
|
dst_exists = True
|
|
try:
|
|
dst_size = os.path.getsize(dst)
|
|
if dst_size == 0:
|
|
dst_exists = False
|
|
except Exception:
|
|
dst_exists = False
|
|
|
|
do_copy = False
|
|
if dst_exists:
|
|
# TODO: Check if the locally cached variant of the file is sane.
|
|
# This used to be a filesize check that didn't end up working.
|
|
# Once we have watched folders updated files from them might
|
|
# become an issue here... This needs proper cache management.
|
|
# https://github.com/libretime/libretime/issues/756#issuecomment-477853018
|
|
# https://github.com/libretime/libretime/pull/845
|
|
logger.debug("found file %s in cache %s, skipping copy...", file_id, dst)
|
|
else:
|
|
do_copy = True
|
|
|
|
file_event["file_ready"] = not do_copy
|
|
|
|
if do_copy:
|
|
logger.info("copying file %s to cache %s", file_id, dst)
|
|
try:
|
|
with open(dst, "wb") as handle:
|
|
logger.info(file_event)
|
|
try:
|
|
response = self.api_client.download_file(file_id, stream=True)
|
|
for chunk in response.iter_content(chunk_size=2048):
|
|
handle.write(chunk)
|
|
|
|
except HTTPError as exception:
|
|
raise RuntimeError(
|
|
f"could not download file {file_event['id']}"
|
|
) from exception
|
|
|
|
# make file world readable and owner writable
|
|
os.chmod(dst, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
|
|
|
|
if file_event["filesize"] == 0:
|
|
file_size = self.report_file_size_and_md5_to_api(
|
|
dst, file_event["id"]
|
|
)
|
|
file_event["filesize"] = file_size
|
|
|
|
file_event["file_ready"] = True
|
|
except Exception as exception:
|
|
logger.exception(
|
|
"could not copy file %s to %s: %s",
|
|
file_id,
|
|
dst,
|
|
exception,
|
|
)
|
|
|
|
def report_file_size_and_md5_to_api(self, file_path: str, file_id: int) -> int:
|
|
try:
|
|
file_size = os.path.getsize(file_path)
|
|
|
|
with open(file_path, "rb") as fh:
|
|
hasher = hashlib.md5(usedforsecurity=False)
|
|
while True:
|
|
data = fh.read(8192)
|
|
if not data:
|
|
break
|
|
hasher.update(data)
|
|
md5_hash = hasher.hexdigest()
|
|
except OSError as exception:
|
|
file_size = 0
|
|
logger.exception(
|
|
"Error getting file size and md5 hash for file id %s: %s",
|
|
file_id,
|
|
exception,
|
|
)
|
|
|
|
# Make PUT request to LibreTime to update the file size and hash
|
|
error_msg = f"Could not update media file {file_id} with file size and md5 hash"
|
|
try:
|
|
self.api_client.update_file(
|
|
file_id,
|
|
json={"filesize": file_size, "md5": md5_hash},
|
|
)
|
|
except (ConnectionError, Timeout):
|
|
logger.exception(error_msg)
|
|
except Exception as exception:
|
|
logger.exception("%s: %s", error_msg, exception)
|
|
|
|
return file_size
|
|
|
|
def get_highest_priority_file_event(
|
|
self,
|
|
file_events: FileEvents,
|
|
) -> Optional[FileEvent]:
|
|
"""
|
|
Get highest priority file event in the queue. Currently the highest
|
|
priority is decided by how close the start time is to "now".
|
|
"""
|
|
if file_events is None or len(file_events) == 0:
|
|
return None
|
|
|
|
sorted_keys = sorted(file_events.keys())
|
|
|
|
if len(sorted_keys) == 0:
|
|
return None
|
|
|
|
highest_priority = sorted_keys[0]
|
|
file_event = file_events[highest_priority]
|
|
|
|
logger.debug("Highest priority item: %s", highest_priority)
|
|
|
|
# Remove this media_item from the dictionary. On the next iteration
|
|
# (from the main function) we won't consider it for prioritization
|
|
# anymore. If on the next iteration we have received a new schedule,
|
|
# it is very possible we will have to deal with the same media_items
|
|
# again. In this situation, the worst possible case is that we try to
|
|
# copy the file again and realize we already have it (thus aborting the copy).
|
|
del file_events[highest_priority]
|
|
|
|
return file_event
|
|
|
|
def main(self):
|
|
while True:
|
|
try:
|
|
if self.file_events is None or len(self.file_events) == 0:
|
|
# We have no schedule, so we have nothing else to do. Let's
|
|
# do a blocked wait on the queue
|
|
self.file_events = self.file_events_queue.get(block=True)
|
|
else:
|
|
# We have a schedule we need to process, but we also want
|
|
# to check if a newer schedule is available. In this case
|
|
# do a non-blocking queue.get and in either case (we get something
|
|
# or we don't), get back to work on preparing getting files.
|
|
try:
|
|
self.file_events = self.file_events_queue.get_nowait()
|
|
except Empty:
|
|
pass
|
|
|
|
file_event = self.get_highest_priority_file_event(self.file_events)
|
|
if file_event is not None:
|
|
self.copy_file(file_event)
|
|
except Exception as exception:
|
|
logger.exception(exception)
|
|
raise exception
|
|
|
|
def run(self):
|
|
"""
|
|
Entry point of the thread
|
|
"""
|
|
try:
|
|
self.main()
|
|
except Exception as exception:
|
|
logger.exception(exception)
|
|
time.sleep(5)
|
|
|
|
logger.info("PypoFile thread exiting")
|