Getting 405 Method not allowed when connecting to LangServe

[krlng]

I am very unexpierienced with building react frontends, so forgive me if this is an error on my side.

I setup an langserve server using this code: https://github.com/langchain-ai/langserve/blob/main/examples/agent_custom_streaming/server.py

When I connect the AiChat to a locally run server, the server returns
"OPTIONS /stream HTTP/1.1" 405 Method Not Allowed

The normal POST route on the server does work. Using most recent langserve 0.2.2 as well as a freshly installed nlux.

[somebodyawesome-dev]

Hey @krlng,

OPTIONS reqeust method is usually sent by the browser as way to verify if the resource is accessbile from different origin, hence it is mostly a CORS problem, can you kindly try to enable CORS and see if it resolves your issues.
Here's some resources:
https://developer.mozilla.org/en-US/docs/Web/HTTP/Methods/OPTIONS#preflighted_requests_in_cors

if you still have same problem i will happily check with you and we can figure it out

[krlng]

Thanks you very much for the answer. To be honest, after some evaluation we settled on building the Chat Interface ourself. So I will close the issue here.