Create fetchYoutubeSubtitle.py

fetchYoutubeSubtitle.py

@@ -0,0 +1,102 @@
+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}