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feat(relay): log non-429/403 upstream errors to KV for debugging #23

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feat(relay): log non-429/403 upstream errors to KV for debugging #23

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53 changes: 53 additions & 0 deletions packages/core/src/relay.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -1106,6 +1106,39 @@ function headersToObject(headers) {
return result
}

const SKIP_ERROR_LOG_STATUSES = new Set([429, 403])

async function logUpstreamError(env, ctx, upstream, meta) {
if (!upstream.status || upstream.status < 400 || SKIP_ERROR_LOG_STATUSES.has(upstream.status)) return
try {
const body = await upstream.clone().text()
const key = 'error:' + Date.now() + ':' + (meta.id || meta.affinity || 'unknown')
const entry = JSON.stringify({
ts: new Date().toISOString(),
status: upstream.status,
statusText: upstream.statusText,
transport: meta.transport,
mode: meta.mode,
affinity: meta.affinity,
id: meta.id,
bodyBytes: meta.bodyBytes,
responseBody: body.slice(0, 50000),
responseHeaders: headersToObject(upstream.headers),
})
const kvWrite = env.RELAY_STATE.put(key, entry, { expirationTtl: 604800 }).catch(() => {})
if (ctx?.waitUntil) ctx.waitUntil(kvWrite)
else void kvWrite
console.error(JSON.stringify({
relay: 'opencode-anthropic-auth',
event: 'upstream_error',
status: upstream.status,
transport: meta.transport,
affinity: String(meta.affinity || '').slice(0, 12),
responsePreview: body.slice(0, 500),
}))
} catch {}
}

async function handleRelayPayload(env, payload) {
const prepared = await prepareUpstream(env, payload)
if (prepared.error) return prepared
Expand Down Expand Up @@ -1143,6 +1176,20 @@ async function handleWebSocket(socket, env, ctx, payload, getState, setState) {
})
ctx?.waitUntil?.(result.checkpoint)
const upstream = await upstreamPromise

// Log non-429/403 errors to KV for debugging
if (upstream.status >= 400 && !SKIP_ERROR_LOG_STATUSES.has(upstream.status)) {
const errorLog = logUpstreamError(env, ctx, upstream.clone(), {
transport: 'websocket',
mode: payload.mode,
affinity: payload.affinity,
id: payload.id,
bodyBytes: result.body.length,
})
if (ctx?.waitUntil) ctx.waitUntil(errorLog)
else void errorLog
}

socket.send(JSON.stringify({
protocol: 2,
type: 'response_start',
Expand Down Expand Up @@ -1234,6 +1281,12 @@ export default {
if (result.error) return Response.json({ error: result.error }, { status: result.status })

const upstream = result.upstream
await logUpstreamError(env, ctx, upstream, {
transport: 'http',
mode: payload.mode,
affinity: payload.affinity,
bodyBytes: payload.body?.length ?? 0,
})
return new Response(upstream.body, {
status: upstream.status,
statusText: upstream.statusText,
Expand Down