Temporary debugging: Write out last 10 media playlists after fetching each segment

mike/playlist-debug
Mike Lang 2 years ago
parent 090a0af7e6
commit a1a6e4a020

@ -347,12 +347,15 @@ class StreamWorker(object):
def _run(self):
first = True
history = []
HISTORY_SIZE = 10
while not self.stopping.is_set():
self.logger.debug("Getting media playlist {}".format(self.url))
try:
with soft_hard_timeout(self.logger, "getting media playlist", self.FETCH_TIMEOUTS, self.trigger_new_worker):
playlist = self.manager.provider.get_media_playlist(self.url, session=self.session)
playlist_time = datetime.datetime.utcnow()
raw_playlist, playlist = self.manager.provider.get_media_playlist(self.url, session=self.session)
except Exception as e:
self.logger.warning("Failed to fetch media playlist {}".format(self.url), exc_info=True)
self.trigger_new_worker()
@ -368,6 +371,8 @@ class StreamWorker(object):
# We successfully got the playlist at least once
first = False
history = [(playlist_time, raw_playlist)] + history[:HISTORY_SIZE]
# Start any new segment getters
date = None # tracks date in case some segment doesn't include it
for segment in playlist.segments:
@ -393,6 +398,7 @@ class StreamWorker(object):
segment,
date,
self.map_cache,
history,
)
gevent.spawn(self.getters[segment.uri].run)
if date is not None:
@ -448,7 +454,7 @@ class SegmentGetter(object):
# or so, to be paranoid we set it to considerably longer than that.
GIVE_UP_TIMEOUT = 20 * 60
def __init__(self, parent_logger, session, base_dir, channel, quality, segment, date, map_cache):
def __init__(self, parent_logger, session, base_dir, channel, quality, segment, date, map_cache, history):
self.logger = parent_logger.getChild("SegmentGetter@{:x}".format(id(self)))
self.base_dir = base_dir
self.channel = channel
@ -461,6 +467,7 @@ class SegmentGetter(object):
self.done = gevent.event.Event() # set when file exists or we give up
# Our parent's connection pool, but we'll replace it if there's any issues
self.session = session
self.history = history
def run(self):
try:
@ -612,6 +619,16 @@ class SegmentGetter(object):
stat = latest_segment.labels(channel=self.channel, quality=self.quality)
timestamp = (self.date - datetime.datetime(1970, 1, 1)).total_seconds()
stat.set(max(stat._value.get(), timestamp)) # NOTE: not thread-safe but is gevent-safe
self.write_history(full_path)
def write_history(self, segment_path):
segment_path = os.path.relpath(segment_path, self.base_dir)
history_path = os.path.join(self.base_dir, "playlist-debug", segment_path)
os.makedirs(history_path)
for n, (timestamp, playlist) in enumerate(self.history):
filename = "{}_{}".format(n, timestamp.strftime("%Y-%m-%dT%H:%M:%S.%f"))
path = os.path.join(history_path, filename)
common.atomic_write(path, playlist)
def parse_channel(channel):

@ -29,7 +29,8 @@ class Provider:
session = InstrumentedSession()
resp = session.get(uri, metric_name='get_media_playlist')
resp.raise_for_status()
return hls_playlist.load(resp.text, base_uri=resp.url)
playlist = resp.text
return playlist, hls_playlist.load(playlist, base_uri=resp.url)
class URLProvider(Provider):

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