private long CalculateExpiry(URLConnection urlConnection, long request_time, UrlConnectionExpiryCalculator urlConnectionExpiryCalculator)
{
if ("no-cache".Equals(urlConnection.GetHeaderField("Pragma")))
{
return 0L;
}
string cacheControl = urlConnection.GetHeaderField("Cache-Control");
if (cacheControl != null)
{
if (cacheControl.IndexOf("no-cache") != -1)
{
return 0L;
}
int max_age = GetMaxAge(cacheControl);
if (-1 != max_age)
{
long response_time = Runtime.CurrentTimeMillis();
long apparent_age = Math.Max(0, response_time - urlConnection.GetDate());
long corrected_received_age = Math.Max(apparent_age, urlConnection.GetHeaderFieldInt("Age", 0) * 1000L);
long response_delay = response_time - request_time;
long corrected_initial_age = corrected_received_age + response_delay;
long creation_time = response_time - corrected_initial_age;
return max_age * 1000L + creation_time;
}
}
long explicitExpiry = urlConnection.GetHeaderFieldDate("Expires", -1L);
if (explicitExpiry != -1L)
{
return explicitExpiry;
}
return urlConnectionExpiryCalculator == null ? 0L : urlConnectionExpiryCalculator.CalculateExpiry(urlConnection);
}
