private static void ServeSitemapContent(
string domainDataCode, DateTime lastModDate, bool isModified)
{
var response = HttpContext.Current.Response;
var maxAge = new TimeSpan(24, 0, 0); // 24 hours -- used in headers
var expiration = DateTime.UtcNow + maxAge;
response.Cache.SetCacheability(HttpCacheability.Public);
response.Cache.SetETag(
'"' + lastModDate.Ticks.ToString(CultureInfo.InvariantCulture) + '"');
response.Cache.SetLastModified(lastModDate);
response.Cache.SetMaxAge(maxAge);
response.Cache.SetExpires(expiration);
response.Cache.SetSlidingExpiration(false);
if (isModified) // serve actual sitemap
{
var sitemap = Sitemap.GetSitemapXml(domainDataCode);
if (sitemap == null || sitemap.Length == 0)
{
throw new VoteException("No sitemap for {0}", domainDataCode);
}
response.ContentType = "text/xml";
response.ContentEncoding = Encoding.UTF8;
response.BinaryWrite(sitemap);
}
else // tell client to use cached version
{
response.StatusCode = 304;
// Explicitly set the Content-Length header so the client doesn't wait for
// content but keeps the connection open for other requests
response.AddHeader("Content-Length", "0");
}
}
