proxy added

app.py

@@ -16,7 +16,26 @@ from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain_core.messages import HumanMessage
 from langchain_google_genai import GoogleGenerativeAIEmbeddings
 
-
+# Load proxy credentials from Hugging Face Secrets
+PROXY_USER = os.environ.get("PROXY_USER")
+PROXY_PASS = os.environ.get("PROXY_PASS")
+PROXY_HOST = os.environ.get("PROXY_HOST")
+PROXY_PORT = os.environ.get("PROXY_PORT")
+
+if not all([PROXY_USER, PROXY_PASS, PROXY_HOST, PROXY_PORT]):
+    raise RuntimeError("Proxy credentials not fully set in Hugging Face Secrets.")
+
+PROXY_URL = f"http://{PROXY_USER}:{PROXY_PASS}@{PROXY_HOST}:{PROXY_PORT}"
+
+# Create a session with proxy
+proxy_session = requests.Session()
+proxy_session.proxies = {
+    "http": PROXY_URL,
+    "https": PROXY_URL
+}
+
+# Patch youtube_transcript_api to use this proxy session
+TranscriptListFetcher._session = proxy_session
 
 # Initialize the text splitter
 text_splitter = RecursiveCharacterTextSplitter(