public void HandleCacheResponses(IRequest req, IResponse res, object response)
{
if (req.IsInProcessRequest())
return;
if (response is Exception || res.StatusCode >= 300)
return;
var cacheInfo = req.GetItem(Keywords.CacheInfo) as CacheInfo;
if (cacheInfo != null && cacheInfo.CacheKey != null)
{
if (CacheAndWriteResponse(cacheInfo, req, res, response))
return;
}
var httpResult = response as HttpResult;
if (httpResult == null)
return;
cacheInfo = httpResult.ToCacheInfo();
if ((req.Verb != HttpMethods.Get && req.Verb != HttpMethods.Head) ||
(httpResult.StatusCode != HttpStatusCode.OK && httpResult.StatusCode != HttpStatusCode.NotModified))
return;
if (httpResult.LastModified != null)
httpResult.Headers[HttpHeaders.LastModified] = httpResult.LastModified.Value.ToUniversalTime().ToString("r");
if (httpResult.ETag != null)
httpResult.Headers[HttpHeaders.ETag] = httpResult.ETag.Quoted();
if (httpResult.Expires != null)
httpResult.Headers[HttpHeaders.Expires] = httpResult.Expires.Value.ToUniversalTime().ToString("r");
if (httpResult.Age != null)
httpResult.Headers[HttpHeaders.Age] = httpResult.Age.Value.TotalSeconds.ToString(CultureInfo.InvariantCulture);
var alreadySpecifiedCacheControl = httpResult.Headers.ContainsKey(HttpHeaders.CacheControl);
if (!alreadySpecifiedCacheControl)
{
var cacheControl = BuildCacheControlHeader(cacheInfo);
if (cacheControl != null)
httpResult.Headers[HttpHeaders.CacheControl] = cacheControl;
}
if (req.ETagMatch(httpResult.ETag) || req.NotModifiedSince(httpResult.LastModified))
{
res.EndNotModified();
}
}