rob thijssen
0f00f72b47
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Two coupled bugs surfaced after 9b0ed0b:
1. url::Url::parse("http://host:port").to_string() normalises the
empty path to "/", so rewrite_loopback_host was returning
"http://beast:13131/". Downstream callers then did
format!("{endpoint}/v1/chat/completions") and produced a
double-slash path that neuron's axum router 404'd with an empty
body. Strip the trailing slash in the rewriter so the endpoint is
a clean base string for concatenation.
2. The anthropic_messages handler returned the upstream's empty body
to the API caller as `"upstream error: "` with no journal log on
the cortex side. Operators had no way to see what happened. Add
warn-level tracing on both upstream failure paths (network error
and non-2xx) with model, node, target URL, status, and a 512-char
body snippet. The API response now carries just `"upstream
returned <status>"` — the implementation detail lives in the log.
Updates the two existing rewrite tests for the no-trailing-slash
output.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>