Files
multica/server/cmd/multica/cmd_setup_test.go
Bohan Jiang b51d1c4dc3 fix(cli): make browser-login work from a machine that isn't the server (#1556)
* fix(cli): make browser-login work from a machine that isn't the server

The #923 callback host fix only worked when the CLI and the self-hosted
server ran on the same box. In a cross-machine setup — `multica login`
from a laptop against a self-hosted server on a NAS — the flow silently
wedged on two issues:

1. The callback host was derived from `--app-url`, so the `cli_callback`
   URL pointed at the server's IP and the browser could never reach
   the CLI's local listener on the laptop. The OAuth token never came
   back and subsequent `/api/workspaces` calls 401'd on stale state.

2. `net.Listen("tcp", ...)` on macOS can produce an IPv6-only socket.
   Browsers and `curl` resolve `localhost`/`127.0.0.1` to IPv4 first and
   get "connection refused" even when the URL is otherwise correct.

Changes:

- Derive the callback host from the CLI's own outbound interface by
  dialing the server (UDP, no packets sent — just asks the kernel which
  source IP it would use). Falls back to loopback for public app URLs
  and to the app IP for offline detection.
- Add `--callback-host` flag on `login` and `setup self-host` so
  reverse-proxy / FQDN users can override auto-detection — this is the
  follow-up @hassaanz asked for on #923.
- Pin the callback listener to `tcp4` so macOS never lands on an
  IPv6-only socket.
- `multica setup self-host`: when the user explicitly passes a remote
  `--server-url` but omits `--app-url`, infer app URL from the server
  host and warn instead of silently defaulting to `localhost:3000`.

Unit tests cover the binding-decision matrix (public, localhost, same-
machine LAN, cross-machine LAN, outbound-detect failure, flag override)
and the new setup helpers.

Reported by @RafeRoberts in #1494 with very clear repro details.

* fix(cli): prompt for app_url instead of guessing on remote server_url

Per GPT-Boy's review on MUL-1260: deriving app_url as
http://<server-host>:3000 breaks for the common api.example.com +
app.example.com split and for https-fronted deploys — the setup flow
would still open a broken login URL, just slightly later.

Replace the guess with an interactive prompt. If the user hits enter
(or stdin is unavailable), fail loudly with a clear usage hint instead
of proceeding with bad data.
2026-04-23 16:41:29 +08:00

28 lines
661 B
Go

package main
import "testing"
func TestServerHostIsLocal(t *testing.T) {
cases := []struct {
name string
server string
want bool
}{
{"localhost", "http://localhost:8080", true},
{"127.0.0.1", "http://127.0.0.1:8080", true},
{"IPv6 loopback", "http://[::1]:8080", true},
{"LAN IP", "http://192.168.0.28:8080", false},
{"public FQDN", "https://api.internal.co", false},
{"unparseable", "://bad", false},
}
for _, tc := range cases {
tc := tc
t.Run(tc.name, func(t *testing.T) {
if got := serverHostIsLocal(tc.server); got != tc.want {
t.Errorf("serverHostIsLocal(%q) = %v, want %v", tc.server, got, tc.want)
}
})
}
}