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feat(api): structured X-Routing-Fallback-Reason header for relay routing (#6872) (#7262)

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This commit is contained in:
Diego Rodrigues de Sa e Souza
2026-07-17 10:41:30 -03:00
committed by GitHub
parent 29bb59e18d
commit 6bb3207912
5 changed files with 66 additions and 1 deletions
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27
tests/unit/api/v1/relay-routing-backend.test.ts
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@@ -4,6 +4,7 @@ import { readFileSync } from "node:fs";
import {
getBifrostRoutingConfig,
getRoutingFallbackHeader,
getRoutingFallbackReasonHeader,
resolveRelayRoutingBackend,
shouldTryBifrost,
shouldTryBifrostForRequest,
@@ -176,3 +177,29 @@ test("automatic relay keeps the Bifrost timeout active until an SSE stream final
assert.match(streamBranch, /error && backend === "auto"/);
assert.match(streamBranch, /recordBifrostFailure\(/);
});
test("relay routing fallback reason header strips dynamic cooldown detail to the stable code", () => {
assert.equal(
getRoutingFallbackReasonHeader("bifrost-cooldown; remaining=1500"),
"bifrost-cooldown"
);
});
test("relay routing fallback reason header passes already-stable reasons through unchanged", () => {
assert.equal(getRoutingFallbackReasonHeader("bifrost-error"), "bifrost-error");
assert.equal(getRoutingFallbackReasonHeader("bifrost-ineligible"), "bifrost-ineligible");
assert.equal(
getRoutingFallbackReasonHeader("bifrost-provider-unknown"),
"bifrost-provider-unknown"
);
});
test("relay routing fallback reason header stays unset for the bare static legacy value", () => {
assert.equal(getRoutingFallbackReasonHeader("bifrost"), undefined);
});
test("relay routing fallback reason header stays unset for null/undefined/unrecognized input", () => {
assert.equal(getRoutingFallbackReasonHeader(null), undefined);
assert.equal(getRoutingFallbackReasonHeader(undefined), undefined);
assert.equal(getRoutingFallbackReasonHeader("something-unrecognized"), undefined);
});