xpzouying/xiaohongshu-mcp · error

按下方向键失败

Error message

按下方向键失败

What it means

This error wraps a failure when executing the ArrowDown key press (ka.Type(input.ArrowDown).Do()) inside inputTags' 20-iteration caret navigation loop. KeyActions() succeeded but dispatching the key event via CDP failed — usually a browser-side issue: page crashed, navigation interrupted, or input dispatch rejected.

Source

Thrown at xiaohongshu/publish.go:700

	}

	return findTextboxByPlaceholder(page)
}

func inputTags(ctx context.Context, contentElem *rod.Element, tags []string) error {
	if len(tags) == 0 {
		return nil
	}

	time.Sleep(1 * time.Second)

	for i := 0; i < 20; i++ {
		ka, err := contentElem.KeyActions()
		if err != nil {
			return errors.Wrap(err, "创建键盘操作失败")
		}
		if err := ka.Type(input.ArrowDown).Do(); err != nil {
			return errors.Wrap(err, "按下方向键失败")
		}
		time.Sleep(10 * time.Millisecond)
	}

	ka, err := contentElem.KeyActions()
	if err != nil {
		return errors.Wrap(err, "创建键盘操作失败")
	}
	if err := ka.Press(input.Enter).Press(input.Enter).Do(); err != nil {
		return errors.Wrap(err, "按下回车键失败")
	}

	time.Sleep(1 * time.Second)

	for _, tag := range tags {
		tag = strings.TrimLeft(tag, "#")
		if err := inputTag(ctx, contentElem, tag); err != nil {
			return errors.Wrapf(err, "输入标签[%s]失败", tag)

View on GitHub (pinned to 332d196854)

Solutions

1. Retry the publish flow — transient input dispatch failures usually clear on a fresh run.
2. Verify the page stays stable (no auto-navigation/modals) during tag input.
3. Check browser health (memory, crash logs) if it recurs; restart the browser.
4. Replace keyboard caret navigation with mouse/caret API (e.g. click at end of text) for robustness.

Example fix

// before
if err := ka.Type(input.ArrowDown).Do(); err != nil {
    return errors.Wrap(err, "按下方向键失败")
}
// after
if err := ka.Type(input.ArrowDown).Do(); err != nil {
    if isTransient(err) {
        time.Sleep(500 * time.Millisecond)
        continue // retry this key press
    }
    return errors.Wrap(err, "按下方向键失败")
}

// confirm the page is stable (same URL, no dialog) before keyboard input
if cur := page.Info().URL; cur != publishURL {
    return fmt.Errorf("页面已跳转: %s", cur)
}

err := publisher.Publish(ctx, opts)
if err != nil && strings.Contains(err.Error(), "按下方向键失败") {
    // transient input dispatch failure: retry with backoff
    time.Sleep(time.Second)
    err = publisher.Publish(ctx, opts)
}

When it happens

Trigger: inputTags (called by submitPublish/submitPublishVideo) is stepping the caret down with ArrowDown; the Do() call on the key action returns an error from the browser (page navigating/crashed, input domain failure).

Common situations: Tab navigated away mid-loop; browser under heavy load dropping input events; editor captured key events and triggered navigation; CDP connection instability.

Related errors

• 按下回车键失败
• 查找正文输入框失败: %s
• 创建键盘操作失败
• 未找到评论 %s，它可能不在「评论和@」里或已被清理
• 回复未确认成功：发送后输入框仍未收起（可能被限制或发送失败）

AI-assisted analysis of xpzouying/xiaohongshu-mcp@332d196854 (2026-09-05). Data as JSON: /api/errors/664846e716e8d367. Report an issue: GitHub.