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https://github.com/diegosouzapw/OmniRoute.git
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5be61dbcd6
* feat(sse): selective upstream 4xx error passthrough util * feat(sse): relay upstream 4xx error bodies verbatim on the Anthropic request path createErrorResult() gains an opt-in 7th param opts.passthrough; when set and the upstream body is eligible (per shouldPassthroughUpstreamError), the returned response body is the upstream 4xx body verbatim instead of the sanitized wrapper. Internal classification fields (error/rawMessage/ errorType/errorCode) are never affected. Wired into chatCore.ts's 7 upstream-error createErrorResult call sites (model_unavailable / context_overflow / generic upstream-error branches), gated on sourceFormat === FORMATS.CLAUDE so only /v1/messages requests get the verbatim body — OpenAI-format paths are unchanged. * test(quality): register upstream-error-passthrough in stryker tap.testFiles `tests/unit/upstream-error-passthrough.test.ts` covers `open-sse/utils/error.ts`, an instrumented module, so `check:mutation-test-coverage --strict` requires it in `tap.testFiles` — the gate flagged the drift on this PR.
39 lines
1.7 KiB
TypeScript
39 lines
1.7 KiB
TypeScript
/**
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* Selective upstream 4xx error passthrough (Claude Code auto-recover contract).
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*
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* Claude Code matches the upstream error WORDING to auto-disable capabilities
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* (thinking / output_config) for the rest of the conversation. Wrapping the body
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* via buildErrorBody() truncates the message and breaks that recovery. For
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* upstream-originated 4xx errors the body is the provider's public API message —
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* not our internals — so it is safe and required to relay it verbatim.
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* OmniRoute-generated errors MUST keep using buildErrorBody() (Hard Rule #12).
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*/
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const PASSTHROUGH_MIN = 400;
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const PASSTHROUGH_MAX = 499;
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// 401/403/407: auth-adjacent — our own credential context may leak via provider
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// echoes; keep those sanitized. 400/404/408/413/422/429 carry the capability and
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// quota wording the client needs.
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const EXCLUDED_STATUSES = new Set([401, 403, 407]);
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const INTERNAL_LEAK_RE = /\sat\s\/|node_modules|omniroute\//i;
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export function shouldPassthroughUpstreamError(statusCode: number, upstreamBody: unknown): boolean {
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if (statusCode < PASSTHROUGH_MIN || statusCode > PASSTHROUGH_MAX) return false;
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if (EXCLUDED_STATUSES.has(statusCode)) return false;
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if (!upstreamBody || typeof upstreamBody !== "object") return false;
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const text = JSON.stringify(upstreamBody);
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if (INTERNAL_LEAK_RE.test(text)) return false;
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return true;
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}
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export function buildPassthroughErrorResponse(
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statusCode: number,
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upstreamBody: unknown,
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headers?: Record<string, string>
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): Response | null {
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if (!shouldPassthroughUpstreamError(statusCode, upstreamBody)) return null;
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return new Response(JSON.stringify(upstreamBody), {
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status: statusCode,
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headers: { "Content-Type": "application/json", ...(headers || {}) },
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});
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}
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