/// <summary>A 304 not modified response.</summary>
public void NotModified(CachedContent cacheEntry)
{
long age = (long)((DateTime.UtcNow - cacheEntry.SavedAt).TotalSeconds);
statusCode = 304;
responseHeaders.status = "HTTP/2.0 304 Not Modified";
responseHeaders["Age"] = age.ToString();
responseHeaders["Date"] = cacheEntry.SavedAt.ToString(Cookie.DateTimePattern);
if (cacheEntry.HasExpiry)
{
responseHeaders["Expires"] = cacheEntry.Expiry.ToString(Cookie.DateTimePattern);
}
if (!string.IsNullOrEmpty(cacheEntry.ETag))
{
responseHeaders["ETag"] = cacheEntry.ETag;
}
responseHeaders["X-Spark-Cache"] = "OK";
// Received:
byte[] data = cacheEntry.Data;
ReceivedData(data, 0, data.Length);
}
/// <summary>Gets binary data, checking the cache first.</summary>
public void OnGetData(ContentPackage package)
{
// Attempt to hit the cache:
CachedContent e = GetCached(package.location);
if (e != null)
{
if (e.Expired)
{
// Expire it!
e.Set.Entries.Remove(e.Path);
// Save the set:
e.Set.Save();
}
else
{
// Successful hit - respond with a 304 (not modified):
package.NotModified(e);
return;
}
}
// Ordinary request:
OnGetDataNow(package);
}
/// <summary>Attempts to get cached data for the given location.</summary>
public CachedContent GetCached(Dom.Location location, bool create)
{
// Get the cache domain data (never null):
DomainData domain = GetDomain(location);
if (domain.Content == null)
{
if (create)
{
// Create the content set:
domain.Content = new CachedContentSet(domain);
}
else
{
return(null);
}
}
// Get the entry:
string path = GetRelative(location);
CachedContent e;
if (!domain.Content.Entries.TryGetValue(path, out e) && create)
{
// Create the entry:
e = new CachedContent(domain.Content, path);
// Add it:
domain.Content.Add(path, e);
}
return(e);
}
/// <summary>Adds a cached file to the index.</summary>
public void Add(string url, CachedContent content)
{
Entries[url] = content;
}