ycdl/frontends/ycdl_flask/backend/ycdl_flask.py
2020-03-28 16:53:39 -07:00

279 lines
9 KiB
Python

'''
Do not execute this file directly.
Use ycdl_launch.py to start the server with gevent.
'''
import logging
logging.getLogger('googleapicliet.discovery_cache').setLevel(logging.ERROR)
import datetime
import flask; from flask import request
import json
import mimetypes
import os
import threading
import time
import traceback
import bot
import ycdl
from voussoirkit import pathclass
from . import jinja_filters
from . import jsonify
root_dir = pathclass.Path(__file__).parent.parent
TEMPLATE_DIR = root_dir.with_child('templates')
STATIC_DIR = root_dir.with_child('static')
FAVICON_PATH = STATIC_DIR.with_child('favicon.png')
youtube_core = ycdl.ytapi.Youtube(bot.get_youtube_key())
ycdldb = ycdl.ycdldb.YCDLDB(youtube_core)
site = flask.Flask(
__name__,
template_folder=TEMPLATE_DIR.absolute_path,
static_folder=STATIC_DIR.absolute_path,
)
site.config.update(
SEND_FILE_MAX_AGE_DEFAULT=180,
TEMPLATES_AUTO_RELOAD=True,
)
site.jinja_env.add_extension('jinja2.ext.do')
site.jinja_env.filters['seconds_to_hms'] = jinja_filters.seconds_to_hms
site.debug = True
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def send_file(filepath):
'''
Range-enabled file sending.
'''
try:
file_size = os.path.getsize(filepath)
except FileNotFoundError:
flask.abort(404)
outgoing_headers = {}
mimetype = mimetypes.guess_type(filepath)[0]
if mimetype is not None:
if 'text/' in mimetype:
mimetype += '; charset=utf-8'
outgoing_headers['Content-Type'] = mimetype
if 'range' in request.headers:
desired_range = request.headers['range'].lower()
desired_range = desired_range.split('bytes=')[-1]
int_helper = lambda x: int(x) if x.isdigit() else None
if '-' in desired_range:
(desired_min, desired_max) = desired_range.split('-')
range_min = int_helper(desired_min)
range_max = int_helper(desired_max)
else:
range_min = int_helper(desired_range)
if range_min is None:
range_min = 0
if range_max is None:
range_max = file_size
# because ranges are 0-indexed
range_max = min(range_max, file_size - 1)
range_min = max(range_min, 0)
range_header = 'bytes {min}-{max}/{outof}'.format(
min=range_min,
max=range_max,
outof=file_size,
)
outgoing_headers['Content-Range'] = range_header
status = 206
else:
range_max = file_size - 1
range_min = 0
status = 200
outgoing_headers['Accept-Ranges'] = 'bytes'
outgoing_headers['Content-Length'] = (range_max - range_min) + 1
if request.method == 'HEAD':
outgoing_data = bytes()
else:
outgoing_data = ycdl.helpers.read_filebytes(filepath, range_min=range_min, range_max=range_max)
response = flask.Response(
outgoing_data,
status=status,
headers=outgoing_headers,
)
return response
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@site.route('/')
def root():
return flask.render_template('root.html')
@site.route('/favicon.ico')
@site.route('/favicon.png')
def favicon():
return flask.send_file(FAVICON_PATH.absolute_path)
@site.route('/channels')
def get_channels():
channels = ycdldb.get_channels()
for channel in channels:
channel['has_pending'] = ycdldb.channel_has_pending(channel['id'])
return flask.render_template('channels.html', channels=channels)
@site.route('/videos')
@site.route('/watch')
@site.route('/videos/<download_filter>')
@site.route('/channel/<channel_id>')
@site.route('/channel/<channel_id>/<download_filter>')
def get_channel(channel_id=None, download_filter=None):
if channel_id is not None:
try:
ycdldb.add_channel(channel_id)
except Exception:
traceback.print_exc()
channel = ycdldb.get_channel(channel_id)
else:
channel = None
orderby = request.args.get('orderby', None)
video_id = request.args.get('v', '')
if video_id:
ycdldb.insert_video(video_id)
videos = [ycdldb.get_video(video_id)]
else:
videos = ycdldb.get_videos(
channel_id=channel_id,
download_filter=download_filter,
orderby=orderby,
)
search_terms = request.args.get('q', '').lower().strip().replace('+', ' ').split()
if search_terms:
videos = [v for v in videos if all(term in v['title'].lower() for term in search_terms)]
limit = request.args.get('limit', None)
if limit is not None:
try:
limit = int(limit)
videos = videos[:limit]
except ValueError:
pass
for video in videos:
published = video['published']
published = datetime.datetime.utcfromtimestamp(published)
published = published.strftime('%Y %m %d')
video['_published_str'] = published
all_states = ycdldb.get_all_states()
return flask.render_template(
'channel.html',
all_states=all_states,
channel=channel,
download_filter=download_filter,
query_string='?' + request.query_string.decode('utf-8'),
videos=videos,
)
@site.route('/mark_video_state', methods=['POST'])
def post_mark_video_state():
if 'video_ids' not in request.form or 'state' not in request.form:
flask.abort(400)
video_ids = request.form['video_ids']
state = request.form['state']
try:
video_ids = video_ids.split(',')
for video_id in video_ids:
ycdldb.mark_video_state(video_id, state, commit=False)
ycdldb.sql.commit()
except ycdl.exceptions.NoSuchVideo:
ycdldb.rollback()
traceback.print_exc()
flask.abort(404)
except ycdl.exceptions.InvalidVideoState:
ycdldb.rollback()
flask.abort(400)
return jsonify.make_json_response({'video_ids': video_ids, 'state': state})
@site.route('/refresh_all_channels', methods=['POST'])
def post_refresh_all_channels():
force = request.form.get('force', False)
force = ycdl.helpers.truthystring(force)
ycdldb.refresh_all_channels(force=force)
return jsonify.make_json_response({})
@site.route('/refresh_channel', methods=['POST'])
def post_refresh_channel():
if 'channel_id' not in request.form:
flask.abort(400)
channel_id = request.form['channel_id']
channel_id = channel_id.strip()
if not channel_id:
flask.abort(400)
if not (len(channel_id) == 24 and channel_id.startswith('UC')):
# It seems they have given us a username instead.
try:
channel_id = ycdldb.youtube.get_user_id(username=channel_id)
except IndexError:
flask.abort(404)
force = request.form.get('force', False)
force = ycdl.helpers.truthystring(force)
ycdldb.add_channel(channel_id, commit=False)
ycdldb.refresh_channel(channel_id, force=force)
return jsonify.make_json_response({})
@site.route('/start_download', methods=['POST'])
def post_start_download():
if 'video_ids' not in request.form:
flask.abort(400)
video_ids = request.form['video_ids']
try:
video_ids = video_ids.split(',')
for video_id in video_ids:
ycdldb.download_video(video_id, commit=False)
ycdldb.sql.commit()
except ycdl.ytapi.VideoNotFound:
ycdldb.rollback()
flask.abort(404)
return jsonify.make_json_response({'video_ids': video_ids, 'state': 'downloaded'})
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def refresher_thread(rate):
while True:
time.sleep(rate)
print('Starting refresh job.')
thread_kwargs = {'force': False, 'skip_failures': True}
refresh_job = threading.Thread(target=ycdldb.refresh_all_channels, kwargs=thread_kwargs, daemon=True)
refresh_job.start()
def start_refresher_thread(rate):
print(f'Starting refresher thread, once per {rate} seconds.')
refresher = threading.Thread(target=refresher_thread, args=[rate], daemon=True)
refresher.start()