Update app.py

app.py

@@ -13,6 +13,9 @@ from fastrtc import AsyncStreamHandler, Stream, get_twilio_turn_credentials, wai
 from pydantic import BaseModel
 import uvicorn
 
+# --- Import get_space to detect Hugging Face Spaces ---
+from gradio.utils import get_space
+
 # --- Document processing and RAG libraries ---
 import PyPDF2
 import docx
@@ -195,15 +198,18 @@ class RAGVoiceHandler(AsyncStreamHandler):
         self.quit.set()
 
 # ====================================================
-# 4. Twilio Voice Streaming Setup & FastAPI Endpoints
+# 4. Voice Streaming Setup & FastAPI Endpoints
 # ====================================================
 
-# Create a Stream instance using our RAGVoiceHandler and Twilio TURN credentials
+# When running on Hugging Face Spaces, we bypass the Twilio TURN credentials by setting rtc_configuration to None.
+rtc_config = get_twilio_turn_credentials() if not get_space() else None
+
+# Create a Stream instance using our RAGVoiceHandler.
 stream = Stream(
     modality="audio",
     mode="send-receive",
     handler=RAGVoiceHandler(),
-    rtc_configuration=get_twilio_turn_credentials(),
+    rtc_configuration=rtc_config,
     concurrency_limit=5,
     time_limit=90,
 )
@@ -220,18 +226,17 @@ async def input_hook(body: InputData):
     stream.set_input(body.webrtc_id)
     return {"status": "ok"}
 
-# Endpoint to handle WebRTC offer from the client (Twilio voice calls)
+# Endpoint to handle WebRTC offer from the client (for voice calls)
 @app.post("/webrtc/offer")
 async def webrtc_offer(offer: dict):
     # This uses fastrtc's built-in handling of the offer to set up the connection.
     return await stream.handle_offer(offer)
 
-# Serve your existing HTML file (which contains your Twilio/WebRTC voice UI)
+# Serve your existing HTML file (which contains your voice UI)
 @app.get("/")
 async def index():
     index_path = current_dir / "index.html"
     html_content = index_path.read_text()
-    # If needed, replace any placeholders (for example, RTC configuration)
     return HTMLResponse(content=html_content)
 
 # ====================================================
@@ -248,7 +253,7 @@ if __name__ == "__main__":
         iface = gr.Interface(fn=gradio_chat, inputs="text", outputs="text", title="Customer Support Chatbot")
         iface.launch(server_port=7860)
     elif mode == "PHONE":
-        # Run the FastAPI app so that callers can use the Twilio phone number to speak to the bot.
+        # Run the FastAPI app so that callers can use the voice functionality.
         uvicorn.run(app, host="0.0.0.0", port=7860)
     else:
         uvicorn.run(app, host="0.0.0.0", port=7860)