195 lines
6.7 KiB
Python
195 lines
6.7 KiB
Python
import hashlib
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import os
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import stat
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import time
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import traceback
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from queue import Empty
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from threading import Thread
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from libretime_api_client import version2 as api_client
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from loguru import logger
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from requests.exceptions import ConnectionError, Timeout
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class PypoFile(Thread):
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def __init__(self, schedule_queue):
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Thread.__init__(self)
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self.media_queue = schedule_queue
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self.media = None
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self.api_client = api_client.AirtimeApiClient()
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def copy_file(self, media_item):
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"""
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Copy media_item from local library directory to local cache directory.
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"""
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src = media_item["uri"]
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dst = media_item["dst"]
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src_size = media_item["filesize"]
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dst_exists = True
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try:
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dst_size = os.path.getsize(dst)
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if dst_size == 0:
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dst_exists = False
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except Exception as e:
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dst_exists = False
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do_copy = False
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if dst_exists:
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# TODO: Check if the locally cached variant of the file is sane.
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# This used to be a filesize check that didn't end up working.
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# Once we have watched folders updated files from them might
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# become an issue here... This needs proper cache management.
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# https://github.com/libretime/libretime/issues/756#issuecomment-477853018
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# https://github.com/libretime/libretime/pull/845
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logger.debug(
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"file %s already exists in local cache as %s, skipping copying..."
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% (src, dst)
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)
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else:
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do_copy = True
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media_item["file_ready"] = not do_copy
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if do_copy:
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logger.info(f"copying from {src} to local cache {dst}")
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try:
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with open(dst, "wb") as handle:
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logger.info(media_item)
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response = self.api_client.services.file_download_url(
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id=media_item["id"]
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)
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if not response.ok:
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logger.error(response)
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raise Exception(
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"%s - Error occurred downloading file"
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% response.status_code
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)
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for chunk in response.iter_content(chunk_size=1024):
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handle.write(chunk)
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# make file world readable and owner writable
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os.chmod(dst, stat.S_IRUSR | stat.S_IWUSR | stat.S_IRGRP | stat.S_IROTH)
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if media_item["filesize"] == 0:
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file_size = self.report_file_size_and_md5_to_api(
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dst, media_item["id"]
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)
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media_item["filesize"] = file_size
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media_item["file_ready"] = True
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except Exception as e:
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logger.error(f"Could not copy from {src} to {dst}")
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logger.error(e)
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def report_file_size_and_md5_to_api(self, file_path, file_id):
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try:
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file_size = os.path.getsize(file_path)
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with open(file_path, "rb") as fh:
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m = hashlib.md5()
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while True:
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data = fh.read(8192)
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if not data:
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break
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m.update(data)
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md5_hash = m.hexdigest()
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except OSError as e:
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file_size = 0
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logger.error(
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"Error getting file size and md5 hash for file id %s" % file_id
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)
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logger.error(e)
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# Make PUT request to LibreTime to update the file size and hash
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error_msg = (
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"Could not update media file %s with file size and md5 hash:" % file_id
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)
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try:
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payload = {"filesize": file_size, "md5": md5_hash}
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response = self.api_client.update_file(file_id, payload)
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except (ConnectionError, Timeout):
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logger.error(error_msg)
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except Exception as e:
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logger.error(error_msg)
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logger.error(e)
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return file_size
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def get_highest_priority_media_item(self, schedule):
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"""
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Get highest priority media_item in the queue. Currently the highest
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priority is decided by how close the start time is to "now".
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"""
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if schedule is None or len(schedule) == 0:
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return None
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sorted_keys = sorted(schedule.keys())
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if len(sorted_keys) == 0:
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return None
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highest_priority = sorted_keys[0]
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media_item = schedule[highest_priority]
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logger.debug("Highest priority item: %s" % highest_priority)
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"""
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Remove this media_item from the dictionary. On the next iteration
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(from the main function) we won't consider it for prioritization
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anymore. If on the next iteration we have received a new schedule,
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it is very possible we will have to deal with the same media_items
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again. In this situation, the worst possible case is that we try to
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copy the file again and realize we already have it (thus aborting the copy).
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"""
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del schedule[highest_priority]
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return media_item
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def main(self):
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while True:
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try:
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if self.media is None or len(self.media) == 0:
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"""
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We have no schedule, so we have nothing else to do. Let's
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do a blocked wait on the queue
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"""
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self.media = self.media_queue.get(block=True)
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else:
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"""
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We have a schedule we need to process, but we also want
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to check if a newer schedule is available. In this case
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do a non-blocking queue.get and in either case (we get something
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or we don't), get back to work on preparing getting files.
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"""
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try:
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self.media = self.media_queue.get_nowait()
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except Empty as e:
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pass
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media_item = self.get_highest_priority_media_item(self.media)
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if media_item is not None:
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self.copy_file(media_item)
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except Exception as e:
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import traceback
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top = traceback.format_exc()
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logger.error(str(e))
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logger.error(top)
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raise
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def run(self):
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"""
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Entry point of the thread
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"""
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try:
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self.main()
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except Exception as e:
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top = traceback.format_exc()
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logger.error("PypoFile Exception: %s", top)
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time.sleep(5)
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logger.info("PypoFile thread exiting")
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