add rag model

app.py

@@ -1,4 +1,5 @@
 import chainlit as cl
+import requests
 
 import os
 from dotenv import load_dotenv
@@ -6,6 +7,24 @@ load_dotenv()
 
 @cl.on_message
 async def main(message: cl.Message):
+    response = call_backend(message.content)
     await cl.Message(
-        content = "response"
+        content = response
     ).send()
+
+def call_backend(user_message):
+    try:
+        url = os.environ.get("RAG_MODEL")
+        headers = {"Content-Type": "application/json"}
+        data = {"query": user_message}
+        response = requests.post(url, json=data, headers=headers, timeout=(5, 50))
+        response.raise_for_status()
+        backend_response = response.json()
+        print(backend_response)
+        return backend_response['respuesta']
+    except requests.exceptions.RequestException as e:
+        print(f"Error al llamar al backend: {e}")
+        return {"error": str(e)}
+    except requests.exceptions.Timeout as e:
+        print(f"Error de timeout: {e}")
+        return {"error": str(e)}