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Remove feed parsing for now since youtube doesn't honor If-Modified-Since header

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This commit is contained in:
James Taylor 2019-06-03 02:05:30 -07:00
parent af9c4e0554
commit 1807bfac49
1 changed files with 4 additions and 67 deletions
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71
youtube/subscriptions.py
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@ -10,12 +10,6 @@ import time
import urllib
import socks, sockshandler
# so as to not completely break on people who have updated but don't know of new dependency
try:
import atoma
except ModuleNotFoundError:
print('Error: atoma not installed, subscriptions will not work')
with open('yt_subscriptions_template.html', 'r', encoding='utf-8') as f:
subscriptions_template = Template(f.read())
@ -132,72 +126,15 @@ def youtube_timestamp_to_posix(dumb_timestamp):
unit = unit[:-1] # remove s from end
return now - number*units[unit]
weekdays = ('Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun')
months = ('Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep', 'Oct', 'Nov', 'Dec')
def _get_upstream_videos(channel_id, time_last_checked):
feed_url = "https://www.youtube.com/feeds/videos.xml?channel_id=" + channel_id
headers = {}
# randomly change time_last_checked up to one day earlier to make tracking harder
time_last_checked = time_last_checked - secrets.randbelow(24*3600)
if time_last_checked < 0: # happens when time_last_checked is initialized to 0 when checking for first time
time_last_checked = 0
# If-Modified-Since header: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/If-Modified-Since
struct_time = time.gmtime(time_last_checked)
weekday = weekdays[struct_time.tm_wday] # dumb requirement
month = months[struct_time.tm_mon - 1]
headers['If-Modified-Since'] = time.strftime(weekday + ', %d ' + month + ' %Y %H:%M:%S GMT', struct_time)
print(headers['If-Modified-Since'])
headers['User-Agent'] = 'Python-urllib' # Don't leak python version
headers['Accept-Encoding'] = 'gzip, br'
req = urllib.request.Request(feed_url, headers=headers)
if settings.route_tor:
opener = urllib.request.build_opener(sockshandler.SocksiPyHandler(socks.PROXY_TYPE_SOCKS5, "127.0.0.1", 9150))
else:
opener = urllib.request.build_opener()
response = opener.open(req, timeout=15)
if response.getcode == '304':
print('No new videos for ' + channel_id)
return []
content = response.read()
print('Retrieved videos for ' + channel_id)
content = util.decode_content(content, response.getheader('Content-Encoding', default='identity'))
feed = atoma.parse_atom_bytes(content)
atom_videos = {}
for entry in feed.entries:
video_id = entry.id_[9:] # example of id_: yt:video:q6EoRBvdVPQ
atom_videos[video_id] = {
'title': entry.title.value,
#'description': '', # Not supported by atoma
#'duration': '', # Youtube's atom feeds don't provide it.. very frustrating
'time_published': int(entry.published.timestamp()),
}
# final list
def _get_upstream_videos(channel_id):
videos = []
# Now check channel page to retrieve missing information for videos
json_channel_videos = channel.get_grid_items(channel.get_channel_tab(channel_id)[1]['response'])
for json_video in json_channel_videos:
info = yt_data_extract.renderer_info(json_video['gridVideoRenderer'])
if 'description' not in info:
info['description'] = ''
if info['id'] in atom_videos:
info.update(atom_videos[info['id']])
else:
info['time_published'] = youtube_timestamp_to_posix(info['published'])
info['time_published'] = youtube_timestamp_to_posix(info['published'])
videos.append(info)
return videos
@ -231,8 +168,8 @@ def post_subscriptions_page(env, start_response):
connection = open_database()
try:
cursor = connection.cursor()
for uploader_id, channel_id, time_last_checked in cursor.execute('''SELECT id, channel_id, time_last_checked FROM subscribed_channels'''):
db_videos = ( (uploader_id, info['id'], info['title'], info['duration'], info['time_published'], info['description']) for info in _get_upstream_videos(channel_id, time_last_checked) )
for uploader_id, channel_id in cursor.execute('''SELECT id, channel_id FROM subscribed_channels'''):
db_videos = ( (uploader_id, info['id'], info['title'], info['duration'], info['time_published'], info['description']) for info in _get_upstream_videos(channel_id) )
cursor.executemany('''INSERT INTO videos (uploader_id, video_id, title, duration, time_published, description) VALUES (?, ?, ?, ?, ?, ?)''', db_videos)
cursor.execute('''UPDATE subscribed_channels SET time_last_checked = ?''', ( int(time.time()), ) )