_COOKBOOK_BASE was hardcoded to http://localhost:7000 with no env-var
override anywhere in the codebase. Tools that do an internal HTTP
loopback (app_api, trigger_research, cookbook state read/write) silently
fail with "All connection attempts failed" whenever the running uvicorn
isn't on port 7000 — which is most non-default deployments and any
side-by-side multi-instance setup. The misleading "Task triggered"
message from manage_tasks during a research request hides that the
underlying research never starts.
Resolution order, lowest to highest priority:
1. Fallback http://127.0.0.1:7000 (preserves legacy default).
2. APP_PORT — derive http://127.0.0.1:$APP_PORT (matches docker-compose
which already reads APP_PORT).
3. ODYSSEUS_INTERNAL_BASE — explicit override (e.g. behind a TLS proxy
where loopback isn't 127.0.0.1).
127.0.0.1 instead of "localhost" avoids IPv6/DNS ambiguity for a
strictly-local call.
No API or schema change. Defaults preserved: existing setups on port
7000 are unaffected.
Caught by #2752.
Co-authored-by: pewdiepie-archdaemon <pewdiepie-archdaemon@users.noreply.github.com>
PewDiePie
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