Source code for langchain_community.document_loaders.bilibili

import json
import re
import warnings
from typing import List, Tuple

import requests
from langchain_core.documents import Document

from langchain_community.document_loaders.base import BaseLoader

# Pre-compile regular expressions for video ID extraction
BV_PATTERN = re.compile(r"BV\w+")
AV_PATTERN = re.compile(r"av[0-9]+")

[docs]class BiliBiliLoader(BaseLoader): """ Load fetching transcripts from BiliBili videos. """
[docs] def __init__( self, video_urls: List[str], sessdata: str = "", bili_jct: str = "", buvid3: str = "", ): """ Initialize the loader with BiliBili video URLs and authentication cookies. if no authentication cookies are provided, the loader can't get transcripts and will only fetch videos info. Args: video_urls (List[str]): List of BiliBili video URLs. sessdata (str): SESSDATA cookie value for authentication. bili_jct (str): BILI_JCT cookie value for authentication. buvid3 (str): BUVI3 cookie value for authentication. """ self.video_urls = video_urls self.credential = None try: from bilibili_api import video except ImportError: raise ImportError( "requests package not found, please install it with " "`pip install bilibili-api-python`" ) if sessdata and bili_jct and buvid3: self.credential = video.Credential( sessdata=sessdata, bili_jct=bili_jct, buvid3=buvid3 )
[docs] def load(self) -> List[Document]: """ Load and return a list of documents containing video transcripts. Returns: List[Document]: List of Document objects transcripts and metadata. """ results = [] for url in self.video_urls: transcript, video_info = self._get_bilibili_subs_and_info(url) doc = Document(page_content=transcript, metadata=video_info) results.append(doc) return results
def _get_bilibili_subs_and_info(self, url: str) -> Tuple[str, dict]: """ Retrieve video information and transcript for a given BiliBili URL. """ bvid = try: from bilibili_api import sync, video except ImportError: raise ImportError( "requests package not found, please install it with " "`pip install bilibili-api-python`" ) if bvid: v = video.Video(, credential=self.credential) else: aid = if aid: v = video.Video(aid=int([2:]), credential=self.credential) else: raise ValueError(f"Unable to find a valid video ID in URL: {url}") video_info = sync(v.get_info()) video_info.update({"url": url}) # Return if no credential is provided if not self.credential: return "", video_info # Fetching and processing subtitles sub = sync(v.get_subtitle(video_info["cid"])) sub_list = sub.get("subtitles", []) if sub_list: sub_url = sub_list[0].get("subtitle_url", "") if not sub_url.startswith("http"): sub_url = "https:" + sub_url response = requests.get(sub_url) if response.status_code == 200: raw_sub_titles = json.loads(response.content).get("body", []) raw_transcript = " ".join([c["content"] for c in raw_sub_titles]) raw_transcript_with_meta_info = ( f"Video Title: {video_info['title']}, " f"description: {video_info['desc']}\n\n" f"Transcript: {raw_transcript}" ) return raw_transcript_with_meta_info, video_info else: warnings.warn( f"Failed to fetch subtitles for {url}. " f"HTTP Status Code: {response.status_code}" ) else: warnings.warn( f"No subtitles found for video: {url}. Returning empty transcript." ) # Return empty transcript if no subtitles are found return "", video_info