Method acquire

cli/plugins/webfetch_render.go:203–232

acquire returns a connected browser, reusing the live instance when it is still healthy and relaunching otherwise. Honors the failure cooldown.

()

// acquire returns a connected browser, reusing the live instance when it
// is still healthy and relaunching otherwise. Honors the failure cooldown.
func (s *renderSession) acquire() (*rod.Browser, error) {
	s.mu.Lock()
	defer s.mu.Unlock()

	if remaining := time.Until(s.cooldownUntil); remaining > 0 {
		return nil, fmt.Errorf("headless rendering suspended after repeated browser failures; retrying in %s", remaining.Round(time.Second))
	}
	if s.browser != nil {
		if _, err := (proto.BrowserGetVersion{}).Call(s.browser); err == nil {
			s.touchLocked()
			return s.browser, nil
		}
		// The browser died underneath us (OOM-killed, crashed): relaunch.
		s.closeLocked()
	}

	// A missing binary is a deterministic, cheap condition with an
	// actionable message — it must NOT trip the breaker.
	bin, ok, err := resolveRenderBrowser()
	if !ok {
		return nil, err
	}
	if err := s.launchLocked(bin); err != nil {
		s.registerFailureLocked()
		return nil, err
	}
	s.consecutiveFailures = 0
	s.touchLocked()
	return s.browser, nil
}

// launchLocked starts Chromium and connects CDP. Callers hold mu.
func (s *renderSession) launchLocked(bin string) error {