Get Chat history when open up the window

[szana8]

Hi,

I started to use this tool, and it is awesome. But one thing which iI can figure out is how can I get back the chat history when the user open up the chat window. I am using the langflow-chat component, and I tried to add a session id manually, but no luck.
Could you please help me what am I miss?

`<langflow-chat
chat_position="top-left"
style="position: fixed; bottom: 50px; right: 50px;"
window_title="Test agent"
flow_id="1d084a7f-c92d-44b3-89c3-49f537ccec11"
host_url="http://localhost:7860"
session_id="123"

`

Thanks,

[dosubot[bot]]

Hey @szana8! I'm here to help you with your tech questions and bug fixes. Let's figure this out together!

To retrieve the chat history when a user opens the chat window using the langflow-chat component, you need to ensure that the session ID is correctly set and that the chat history is being fetched from the server. The get_history method from the ChatHistory class is used to retrieve the chat history for a specific client ID. Here's a brief overview of how it works:

1. Session ID: Make sure the session_id is correctly set in your component. The session ID is crucial for associating the chat history with the correct session.

2. WebSocket Connection: When the chat window is opened, a WebSocket connection is established. During this connection, the chat history is retrieved and sent to the client. Ensure that your server-side implementation correctly handles this WebSocket connection and sends the chat history.

3. Server-Side Code: On the server side, in the handle_websocket method of the ChatService class, the chat history is retrieved and sent to the client when a WebSocket connection is established:

   async def handle_websocket(self, client_id: str, websocket: WebSocket):
       await self.connect(client_id, websocket)
   
       try:
           chat_history = self.chat_history.get_history(client_id)
           chat_history = [chat.model_dump() for chat in chat_history]
           await websocket.send_json(chat_history)
           ...

   This code snippet shows that when a WebSocket connection is opened, the chat history for the given client_id is retrieved, converted to a JSON-serializable format, and sent to the client ^[1].

Ensure that your server is correctly configured to handle these WebSocket connections and that the session_id is properly set and used to retrieve the chat history.

To continue talking to Dosu, mention @dosu.

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[szana8]

So as I understand correctly, the langflow chat is not capable of get the messages which are belongs to the session when I pop up the chat window?

[dosubot[bot]]

The langflow-chat component is indeed capable of retrieving messages associated with a session when the chat window is opened. This is done through a WebSocket connection that fetches the chat history for the specified session_id. If the chat history is not being retrieved, ensure that the session_id is correctly set and that the server-side implementation is properly handling the WebSocket connection to send the chat history to the client ^[1].

To continue talking to Dosu, mention @dosu.

---

^{Help Dosu learn! Give it feedback: Great Response | Irrelevant Answer | Incorrect Sources | Too Verbose | Hallucination | Bug Report | Other}