172 lines
4.5 KiB
Python
172 lines
4.5 KiB
Python
import httpx
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import json
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import re
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import time
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from httpx import ConnectError, NetworkError
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from .. import config
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from ..exceptions import InvalidVideoIdException, PatternUnmatchError, UnknownConnectionError
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from ..util.extract_video_id import extract_video_id
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headers = config.headers
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pattern = re.compile(r"'PLAYER_CONFIG': ({.*}}})")
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item_channel_id = [
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"videoDetails",
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"embeddedPlayerOverlayVideoDetailsRenderer",
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"channelThumbnailEndpoint",
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"channelThumbnailEndpoint",
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"urlEndpoint",
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"urlEndpoint",
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"url"
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]
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item_renderer = [
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"embedPreview",
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"thumbnailPreviewRenderer"
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]
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item_response = [
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"args",
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"embedded_player_response"
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]
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item_author_image = [
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"videoDetails",
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"embeddedPlayerOverlayVideoDetailsRenderer",
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"channelThumbnail",
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"thumbnails",
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0,
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"url"
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]
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item_thumbnail = [
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"defaultThumbnail",
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"thumbnails",
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2,
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"url"
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]
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item_channel_name = [
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"videoDetails",
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"embeddedPlayerOverlayVideoDetailsRenderer",
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"expandedRenderer",
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"embeddedPlayerOverlayVideoDetailsExpandedRenderer",
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"title",
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"runs",
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0,
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"text"
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]
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item_moving_thumbnail = [
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"movingThumbnail",
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"thumbnails",
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0,
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"url"
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]
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class VideoInfo:
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'''
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VideoInfo object retrieves YouTube video information.
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Parameter
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---------
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video_id : str
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Exception
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---------
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InvalidVideoIdException :
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Occurs when video_id does not exist on YouTube.
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'''
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def __init__(self, video_id):
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self.video_id = extract_video_id(video_id)
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text = self._get_page_text(self.video_id)
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self._parse(text)
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def _get_page_text(self, video_id):
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url = f"https://www.youtube.com/embed/{video_id}"
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err = None
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for _ in range(3):
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try:
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resp = httpx.get(url, headers=headers)
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resp.raise_for_status()
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break
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except (ConnectError, NetworkError) as e:
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err = e
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time.sleep(3)
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else:
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raise UnknownConnectionError(str(err))
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return resp.text
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def _parse(self, text):
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result = re.search(pattern, text)
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if result is None:
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raise PatternUnmatchError(text)
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decoder = json.JSONDecoder()
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res = decoder.raw_decode(result.group(1)[:-1])[0]
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response = self._get_item(res, item_response)
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if response is None:
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self._check_video_is_private(res.get("args"))
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self._renderer = self._get_item(json.loads(response), item_renderer)
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if self._renderer is None:
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raise InvalidVideoIdException(
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f"No renderer found in video_id: [{self.video_id}].")
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def _check_video_is_private(self, args):
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if args and args.get("video_id"):
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raise InvalidVideoIdException(
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f"video_id [{self.video_id}] is private or deleted.")
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raise InvalidVideoIdException(
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f"video_id [{self.video_id}] is invalid.")
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def _get_item(self, dict_body, items: list):
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for item in items:
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if dict_body is None:
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break
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if isinstance(dict_body, dict):
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dict_body = dict_body.get(item)
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continue
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if isinstance(item, int) and \
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isinstance(dict_body, list) and \
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len(dict_body) > item:
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dict_body = dict_body[item]
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continue
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return None
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return dict_body
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def get_duration(self):
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duration_seconds = self._renderer.get("videoDurationSeconds")
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if duration_seconds:
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'''Fetched value is string, so cast to integer.'''
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return int(duration_seconds)
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'''When key is not found, explicitly returns None.'''
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return None
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def get_title(self):
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if self._renderer.get("title"):
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return [''.join(run["text"])
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for run in self._renderer["title"]["runs"]][0]
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return None
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def get_channel_id(self):
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channel_url = self._get_item(self._renderer, item_channel_id)
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if channel_url:
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return channel_url[9:]
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return None
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def get_author_image(self):
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return self._get_item(self._renderer, item_author_image)
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def get_thumbnail(self):
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return self._get_item(self._renderer, item_thumbnail)
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def get_channel_name(self):
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return self._get_item(self._renderer, item_channel_name)
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def get_moving_thumbnail(self):
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return self._get_item(self._renderer, item_moving_thumbnail)
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