Deploying PDF Version v9

app.py

@@ -72,7 +72,9 @@ def process_file(file: AskFileResponse):
 
 
 @cl.on_chat_start
-async def on_chat_start():
+async def start():
+    await cl.Message("Welcome! Chat session started. You can now ask questions about the uploaded PDF.").send()
+    
     files = None
 
     # Wait for the user to upload a file
@@ -142,14 +144,13 @@ async def main(message):
     print(debug_info)
     
     try:
-        # If message is a string, wrap it in a cl.Message object
-        if isinstance(message, str):
-            message = cl.Message(content=message)
+        # If message is a string, use it directly
+        message_content = message if isinstance(message, str) else message.content
         
         chain = cl.user_session.get("chain")  # type: ConversationalRetrievalChain
         cb = cl.AsyncLangchainCallbackHandler()
         
-        res = await chain.acall(message.content, callbacks=[cb])
+        res = await chain.acall(message_content, callbacks=[cb])
         answer = res["answer"]
         source_documents = res["source_documents"]  # type: List[Document]