[Bug]: Using a port other than 3000 on the client breaks LLM setup on :main

[jriff]

Is there an existing issue for the same bug?

• [X] I have checked the existing issues.

Describe the bug and reproduction steps

When running the docker command with eg. -p 3001:3000, the LLM setup breaks as seen on this screenshot:

I can't choose anything in the drop-downs. I just see "verified" and "others" but none of them are clickable. I don't know if this is a known issue. It happens both in Safari and Chrome on Mac.

OpenHands Installation

Docker command in README

OpenHands Version

main

Operating System

MacOS

Logs, Errors, Screenshots, and Additional Context

No response

[amanape]

If hostname is localhost, the server fallback URL to communicate with the backend is always localhost:3000. This is incorrect in your scenario since the server is now running on localhost:3001.

https://github.com/All-Hands-AI/OpenHands/blob/caa77cf7a6c1a94ea2b51357967c4646d00edad8/frontend/src/utils/get-valid-fallback-host.ts#L12-L20

For now, you can run OpenHands locally (pull and run make build && make run). Feel free to set the environment variable to whichever URL you need here: https://github.com/All-Hands-AI/OpenHands/blob/caa77cf7a6c1a94ea2b51357967c4646d00edad8/frontend/.env.sample#L1

Note that in this mode, the frontend is expected to be served on localhost:3001, another limitation but its because: https://github.com/All-Hands-AI/OpenHands/blob/caa77cf7a6c1a94ea2b51357967c4646d00edad8/openhands/server/listen.py#L79

Will create an issue for this soon, feel free to submit a PR to fix these if you're up for it 😃

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