RedisChatMessageHistory with SSL

[sjadlakha]

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Example Code

from langchain_community.chat_message_histories import RedisChatMessageHistory

history = RedisChatMessageHistory(session_id="foo", url="rediss://myhost:8001", ssl_certfile=ssl_cert, ssl_keyfile=ssl_key, ssl_cipher_default=True)

Description

This is throwing a type error:
RedisChatMessageHistory.init() got an unexpected keyword argument 'ssl_certfile'

How can I fix this error. I want to connect to the redis instance with ssl certs for message history

System Info

linux

[dosubot[bot]]

It looks like the RedisChatMessageHistory class doesn't directly support SSL parameters like ssl_certfile or ssl_keyfile in its constructor. To establish a secure connection to Redis with SSL certificates, you should use the get_client function from the redis utility module in LangChain, which is designed to handle such configurations.

Here's a quick guide on how to do it:

1. Use the get_client function to create a Redis client with SSL parameters.
2. Ensure your Redis URL starts with rediss:// to indicate an SSL connection.
3. Specify your SSL certificate files and requirements in the function call.

Example code snippet:

from langchain_community.utilities.redis import get_client

# Replace the following with your actual SSL files and Redis credentials
ssl_cert_reqs = 'required'
ssl_ca_certs = '/path/to/ca_cert.pem'
ssl_certfile = '/path/to/client_cert.pem'
ssl_keyfile = '/path/to/client_key.pem'

redis_client = get_client(
    redis_url="rediss://username:password@your_redis_host:6379",
    ssl_cert_reqs=ssl_cert_reqs,
    ssl_ca_certs=ssl_ca_certs,
    ssl_certfile=ssl_certfile,
    ssl_keyfile=ssl_keyfile
)

Make sure to replace placeholders with your actual Redis credentials and paths to your SSL certificate files. This approach should help you bypass the TypeError and securely connect to your Redis instance with SSL for message history.

For further details, you might want to check the source code of the get_client function and the RedisChatMessageHistory class in the LangChain framework. If you need more assistance or have additional questions, feel free to ask.

Sources

• libs/community/langchain_community/utilities/redis.py
• libs/community/langchain_community/chat_message_histories/redis.py

About Dosu

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[sjadlakha]

@dosu-bot
how can I use this client in the RedisChatMessageHistory class?

[dosubot[bot]]

To use a custom Redis client with SSL in the RedisChatMessageHistory class, you'll need to modify the class to accept a Redis client instance as an initialization parameter. This modification allows you to create a client with SSL parameters externally and pass it to the RedisChatMessageHistory upon instantiation.

Here's a simplified example of how you could adjust the RedisChatMessageHistory class:

class RedisChatMessageHistory(BaseChatMessageHistory):
    def __init__(self, session_id: str, redis_client=None, key_prefix: str = "message_store:", ttl: Optional[int] = None):
        super().__init__(session_id)
        self.redis_client = redis_client if redis_client else get_client(redis_url="redis://localhost:6379/0")
        self.key_prefix = key_prefix
        self.ttl = ttl

With this adjustment, you can now pass your SSL-configured Redis client when creating an instance of RedisChatMessageHistory:

chat_history = RedisChatMessageHistory(session_id="your_session_id", redis_client=redis_client)

Ensure you replace "your_session_id" with your actual session ID and redis_client with your SSL-configured Redis client instance. This approach allows you to bypass the limitations of the original class design and securely connect to Redis with SSL for message history.

Remember, this is a hypothetical solution and requires modifying the LangChain library's source code. Always test your changes thoroughly to ensure they work as expected.

Sources

• Redis Client connection with Langchain
• libs/langchain/langchain/memory/chat_message_histories/redis.py
• libs/community/langchain_community/chat_message_histories/redis.py

About Dosu

This response is meant to be useful and save you time. It is not meant to be a precise solution, but rather a starting point for your own research.

Help me be more useful! Please leave a 👍 if this is helpful and 👎 if it is irrelevant.

If you want to continue the conversation, start your reply with @dosu-bot.

[paololazzari]

+1