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fix: address second round code review feedback

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Issues found by Claude Opus 4.5 + Gemini 3 Pro:

HIGH PRIORITY FIXES:
- Mark account rate-limited when 429 occurs during retry (was losing resetMs)
- Add exponential backoff between retries (500ms, 1000ms, 2000ms)
- Fix 5xx handling: don't pass error response to streamer, refetch instead
- Use recognizable error messages (429/401) for isRateLimitError/isAuthError

MEDIUM PRIORITY FIXES:
- Refactor while loop to for loop for clearer retry semantics
- Simplify logic flow with early returns

Code review by: Claude Opus 4.5 + Gemini 3 Pro Preview

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This commit is contained in:
BrunoMarc
2026-01-07 18:21:25 -03:00
parent 05cd80ebb5
commit 1c80c8ba52
1 changed files with 59 additions and 43 deletions
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62
src/cloudcode/streaming-handler.js
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@@ -145,18 +145,31 @@ export async function* sendMessageStream(anthropicRequest, accountManager, fallb
}
// Stream the response with retry logic for empty responses
let emptyRetries = 0;
// Uses a for-loop for clearer retry semantics
let currentResponse = response;
while (emptyRetries <= MAX_EMPTY_RESPONSE_RETRIES) {
for (let emptyRetries = 0; emptyRetries <= MAX_EMPTY_RESPONSE_RETRIES; emptyRetries++) {
try {
yield* streamSSEResponse(currentResponse, anthropicRequest.model);
logger.debug('[CloudCode] Stream completed');
return;
} catch (streamError) {
if (isEmptyResponseError(streamError) && emptyRetries < MAX_EMPTY_RESPONSE_RETRIES) {
emptyRetries++;
logger.warn(`[CloudCode] Empty response, retry ${emptyRetries}/${MAX_EMPTY_RESPONSE_RETRIES}...`);
// Only retry on EmptyResponseError
if (!isEmptyResponseError(streamError)) {
throw streamError;
}
// Check if we have retries left
if (emptyRetries >= MAX_EMPTY_RESPONSE_RETRIES) {
logger.error(`[CloudCode] Empty response after ${MAX_EMPTY_RESPONSE_RETRIES} retries`);
yield* emitEmptyResponseFallback(anthropicRequest.model);
return;
}
// Exponential backoff: 500ms, 1000ms, 2000ms
const backoffMs = 500 * Math.pow(2, emptyRetries);
logger.warn(`[CloudCode] Empty response, retry ${emptyRetries + 1}/${MAX_EMPTY_RESPONSE_RETRIES} after ${backoffMs}ms...`);
await sleep(backoffMs);
// Refetch the response
currentResponse = await fetch(url, {
@@ -169,39 +182,42 @@ export async function* sendMessageStream(anthropicRequest, accountManager, fallb
if (!currentResponse.ok) {
const retryErrorText = await currentResponse.text();
// Re-throw rate limit errors to trigger account switch
// Rate limit error - mark account and throw to trigger account switch
if (currentResponse.status === 429) {
const resetMs = parseResetTime(currentResponse, retryErrorText);
throw new Error(`Rate limited during retry: ${retryErrorText}`);
accountManager.markRateLimited(account.email, resetMs, model);
throw new Error(`429 RESOURCE_EXHAUSTED during retry: ${retryErrorText}`);
}
// Re-throw auth errors for proper handling
// Auth error - clear caches and throw with recognizable message
if (currentResponse.status === 401) {
accountManager.clearTokenCache(account.email);
accountManager.clearProjectCache(account.email);
throw new Error(`Auth error during retry: ${retryErrorText}`);
throw new Error(`401 AUTH_INVALID during retry: ${retryErrorText}`);
}
// For 5xx errors, continue to next retry attempt
// For 5xx errors, don't pass to streamer - just continue to next retry
if (currentResponse.status >= 500) {
logger.warn(`[CloudCode] Retry got ${currentResponse.status}, continuing...`);
logger.warn(`[CloudCode] Retry got ${currentResponse.status}, will retry...`);
// Don't continue here - let the loop increment and refetch
// Set currentResponse to null to force refetch at loop start
emptyRetries--; // Compensate for loop increment since we didn't actually try
await sleep(1000);
continue;
// Refetch immediately for 5xx
currentResponse = await fetch(url, {
method: 'POST',
headers: buildHeaders(token, model, 'text/event-stream'),
body: JSON.stringify(payload)
});
if (currentResponse.ok) {
continue; // Try streaming with new response
}
// If still failing, let it fall through to throw
}
throw new Error(`Empty response retry failed: ${currentResponse.status} - ${retryErrorText}`);
}
continue;
}
// After max retries, emit fallback message
if (isEmptyResponseError(streamError)) {
logger.error(`[CloudCode] Empty response after ${MAX_EMPTY_RESPONSE_RETRIES} retries`);
yield* emitEmptyResponseFallback(anthropicRequest.model);
return;
}
throw streamError;
// Response is OK, loop will continue to try streamSSEResponse
}
}