static bool canUseResponse(ResourceResponse& response, double responseTimestamp)
{
if (response.isNull())
return false;
// FIXME: Why isn't must-revalidate considered a reason we can't use the response?
if (response.cacheControlContainsNoCache() || response.cacheControlContainsNoStore())
return false;
if (response.httpStatusCode() == 303) {
// Must not be cached.
return false;
}
if (response.httpStatusCode() == 302 || response.httpStatusCode() == 307) {
// Default to not cacheable unless explicitly allowed.
bool hasMaxAge = std::isfinite(response.cacheControlMaxAge());
bool hasExpires = std::isfinite(response.expires());
// TODO: consider catching Cache-Control "private" and "public" here.
if (!hasMaxAge && !hasExpires)
return false;
}
return currentAge(response, responseTimestamp) <= freshnessLifetime(response, responseTimestamp);
}
bool CachedResource::isExpired() const
{
if (m_response.isNull())
return false;
return currentAge() > freshnessLifetime();
}