private void OnUpdateRequestCache(object sender, EdgeCacheEventArgs e)
{
EdgeCacheRule rule = (EdgeCacheRule)sender;
HttpContext context = e.Context;
HttpResponse response = context.Response;
HttpRequest request = context.Request;
OutputCacheKeyBuilder keyBuilder = new OutputCacheKeyBuilder(context);
if (response.StatusCode != 200)
{
return;
}
DynamicInvoke invoker = new DynamicInvoke(response);
if (!(bool)invoker.Call("IsBuffered"))
{
return;
}
if (rule.Debug)
{
response.Write("\r\n<!--Served from edge at " + TimeStamp + " by rule " + rule.Name + "-->");
response.AddHeader("X-Edge-Modified", TimeStamp);
response.AddHeader("X-Edge-Rule", rule.Name);
}
object rawResponse = invoker.Call("GetSnapshot");
string cacheKey = keyBuilder.GetResponseCacheKey(rule.CacheKeyStamp(context));
CacheDependency dependency = new CacheDependency(null, new string[] { DependencyKeyFromRule(rule) });
OutputCacheSnapshot snapshot = new OutputCacheSnapshot(rawResponse);
DateTime expiry = rule.AbsoluteExpiry;
HttpRuntime.Cache.Add(cacheKey, snapshot, dependency, expiry, Cache.NoSlidingExpiration, CacheItemPriority.Normal, null);
}
private void OnResolveRequestCache(object sender, EdgeCacheEventArgs e)
{
EdgeCacheRule rule = (EdgeCacheRule)sender;
HttpContext context = e.Context;
HttpResponse response = context.Response;
HttpRequest request = context.Request;
OutputCacheKeyBuilder keyBuilder = new OutputCacheKeyBuilder(context);
OutputCacheSnapshot snapshot = null;
foreach (string cacheKey in keyBuilder.EnumerateRequestCacheKeys(rule.CacheKeyStamp(context)))
{
snapshot = (OutputCacheSnapshot)HttpRuntime.Cache[cacheKey];
if (snapshot != null)
{
break;
}
}
if (snapshot != null && snapshot.Response != null)
{
bool sendBody = !String.Equals(request.HttpMethod, "HEAD", StringComparison.InvariantCultureIgnoreCase);
new DynamicInvoke(response)
.Call("UseSnapshot", snapshot.Response, sendBody);
response.AddHeader("X-Edge", snapshot.Description);
OnPreSendSnapshot(new EdgeCacheRuleEventArgs(e.Context, rule));
context.ApplicationInstance.CompleteRequest();
}
}
