ports

Demonstrates sb.proxy(): start an HTTP server inside a sandbox and send requests to it from the host process via the OpenSandbox server proxy.

Setup

bunx alineo-cli init   # starts OpenSandbox in Docker (one-time setup)

Run

bun install
bun start

What it does

1. Creates a node:22 sandbox and writes a simple HTTP server to /server.js
2. Starts the server on port 3000 in the background
3. Calls sb.proxy(3000) to get a proxy URL and auth headers
4. Sends two requests from the host process and prints the JSON responses

Notes

With useServerProxy: true (the default), sb.proxy() returns a URL that routes through the OpenSandbox server (http://127.0.0.1:8080/sandboxes/{id}/proxy/3000). This works regardless of Docker networking because the server relays the request to the container on your behalf.