projectdiscovery/katana · error

could not get page info

Error message

could not get page info

What it means

Wrapper error from FindNavigations when b.Info() fails. Info fetches page metadata (URL, title) from the browser; the error means the CDP call behind it failed, so anchor hrefs cannot be resolved against the page URL. It aborts the rest of navigation discovery.

Source

Thrown at pkg/engine/headless/browser/element.go:118

		if _, found := unique[hash]; found {
			continue
		}
		unique[hash] = struct{}{}
		navigations = append(navigations, &types.Action{
			Type:    types.ActionTypeLeftClick,
			Element: button,
		})
	}

	scopeValidator := b.launcher.ScopeValidator()
	links, err := b.GetAllElements(linksCSSSelector)
	if err != nil {
		return nil, errors.Wrap(err, "could not get links")
	}
	info, err := b.Info()
	if err != nil {
		return nil, errors.Wrap(err, "could not get page info")
	}
	for _, link := range links {
		href := link.Attributes["href"]
		if href == "" {
			continue
		}

		resolvedHref, err := resolveURL(info.URL, href)
		if err != nil {
			continue
		}

		u, err := url.Parse(resolvedHref)
		if err != nil {
			continue
		}
		if u.Scheme != "http" && u.Scheme != "https" {
			continue

View on GitHub (pinned to e3e742739c)

Solutions

1. Re-acquire the page after navigation instead of reusing a stale BrowserPage handle
2. Verify the browser process is alive; restart headless Chrome on repeated failures
3. Check Info() before running the full discovery and skip dead pages early
4. Update katana/chromedp; older versions leak detached-frame errors

Example fix

// before
info, err := page.Info()
if err != nil { panic(err) }
// after
info, err := page.Info()
if err != nil {
    logger.Warn("page info unavailable, skipping page", slog.String("error", err.Error()))
    return nil
}

info, err := page.Info()
if err != nil || info.URL == "" || info.URL == "about:blank" {
    return // page not ready for discovery
}

func hasValidTarget(p *browser.BrowserPage) bool {
    info, err := p.Info()
    return err == nil && info.URL != "" && info.URL != "about:blank"
}

navs, err := page.FindNavigations()
if err != nil {
    logger.Debug("page info failed; dropping page", slog.String("error", err.Error()))
    return
}

When it happens

Trigger: 1) The page or its target (frame) was closed before Info() ran. 2) The CDP session dropped (browser crash, transport failure). 3) Calling after navigation completed and the frame is detached. 4) A hooked page navigation replaced the target mid-discovery.

Common situations: Crawling fast-redirecting sites; long crawls where a tab dies and stale page handles are reused; concurrent crawling exceeding browser limits.

Related errors

• could not get forms
• could not get buttons
• could not get links
• could not get event listeners
• could not get page state

AI-assisted analysis of projectdiscovery/katana@e3e742739c (2026-09-03). Data as JSON: /api/errors/97aec4e8146f5577. Report an issue: GitHub.