import json import os import requests from langchain.text_splitter import RecursiveCharacterTextSplitter, TokenTextSplitter from typing import List, Dict SUBTITLE_DOWNLOADER_URL = 'https://savesubs.com' def fetchYoutubeSubtitleUrls(video_id): headers = { 'accept': 'application/json, text/plain, */*', 'accept-language': 'en-US,en;q=0.9,zh-CN;q=0.8,zh;q=0.7', 'cache-control': 'no-cache', 'Content-Type': 'application/json; charset=UTF-8', 'pragma': 'no-cache', 'User-Agent': 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36', 'x-auth-token': os.environ.get('SAVESUBS_X_AUTH_TOKEN', ''), 'x-requested-domain': 'savesubs.com', 'X-requested-with': 'xmlhttprequest', 'sec-ch-ua': '"Google Chrome";v="111", "Not(A:Brand";v="8", "Chromium";v="111"', 'sec-ch-ua-mobile': '?0', 'sec-ch-ua-platform': 'Linux', 'sec-fetch-dest': 'empty', 'sec-fetch-mode': 'cors', 'sec-fetch-site': 'same-origin', 'authority': 'savesubs.com', 'origin': 'https://savesubs.com', 'referer': f'https://savesubs.com/process?url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3D{video_id}' } data = { 'data': {'url': f'https://www.youtube.com/watch?v={video_id}'} } session = requests.Session() proxy = os.environ.get('PROXY', None) if proxy: session.proxies = { "http": proxy, "https": proxy, } response = session.post(SUBTITLE_DOWNLOADER_URL + '/action/extract', json=data, headers=headers) if not response.ok: logger.error(headers, "request header") logger.error(response.headers.raw()) return {'title': None, 'subtitleList': None, 'error': response.statusText} else: try: json = response.json().get('response', {}) logger.info(json, 'subtitle url') return {'title': json.get('title'), 'subtitleList': json.get('formats')} except Exception as error: logger.error(error) return {'title': None, 'subtitleList': None, 'error': str(error)} async def find(subtitleList: List[Dict], args: Dict) -> Dict: key = list(args.keys())[0] return next((item for item in subtitleList if item[key] == args[key]), None) async def fetchYoutubeSubtitle(videoId: str) -> Dict: subtitle_url = "" betterSubtitle = {} subtitleList = [] title = "" error = "" result = await fetchYoutubeSubtitleUrls(videoId) title, subtitleList, error = result["title"], result["subtitleList"], result["error"] if not subtitleList or len(subtitleList) <= 0: return {"title": title, "docs": None, "error": error} betterSubtitle = ( await find(subtitleList, {"quality": "English"}) or await find(subtitleList, {"quality": "English (auto"}) or await find(subtitleList, {"quality": "zh-CN"}) or subtitleList[0] ) subtitleUrl = f"{SUBTITLE_DOWNLOADER_URL}{betterSubtitle['url']}?ext=srt" session = requests.Session() proxy = os.environ.get('PROXY', None) if proxy: session.proxies = { "http": proxy, "https": proxy, } response = session.get(url) loader = SRTLoader(await response.blob()) splitter = TokenTextSplitter( encodingName="cl100k_base", chunkSize=2048, ) docs = await loader.loadAndSplit(splitter) return {"title": title, "docs": docs}