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fix: improve message validation and logging in chat completions

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This commit is contained in:
Han Xiao 2025-06-11 23:23:03 -07:00
parent 161bb2f964
commit 5eec6a1860
1 changed files with 14 additions and 9 deletions
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23
src/app.ts
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@ -402,18 +402,11 @@ app.post('/v1/chat/completions', (async (req: Request, res: Response) => {
});
const body = req.body as ChatCompletionRequest;
if (!body.messages?.length) {
return res.status(400).json({ error: 'Messages array is required and must not be empty' });
}
const lastMessage = body.messages[body.messages.length - 1];
if (lastMessage.role !== 'user') {
return res.status(400).json({ error: 'Last message must be from user' });
}
logDebug('Input messages', { messages: body.messages });
// clean <think> from all assistant messages
body.messages = body.messages?.filter(message => {
if (!message || !message.content) return false;
if (message.role === 'assistant') {
// 2 cases message.content can be a string or an array
if (typeof message.content === 'string') {
@ -456,6 +449,18 @@ app.post('/v1/chat/completions', (async (req: Request, res: Response) => {
return true; // Keep other messages
});
if (!body.messages?.length) {
logError('[chat/completions] Messages array is required and must not be empty', { messages: body.messages });
return res.status(400).json({ error: 'Messages array is required and must not be empty' });
}
const lastMessage = body.messages[body.messages.length - 1];
if (lastMessage.role !== 'user') {
logError('[chat/completions] Last message must be from user', { messages: body.messages });
return res.status(400).json({ error: 'Last message must be from user' });
}
logDebug('Input messages', { messages: body.messages });
let { tokenBudget, maxBadAttempts } = getTokenBudgetAndMaxAttempts(
body.reasoning_effort,
body.max_completion_tokens