protected void SetClientCacheHeader(DateTime?LastModified, string Etag, HttpCacheability CacheKind, bool ReValidate = true)
{
if (!EnableClientCache || LastModified == null && Etag == null)
{
return;
}
HttpCachePolicyBase cp = Response.Cache;
cp.AppendCacheExtension("max-age=" + 3600 * MaxClientCacheAgeInHours);
if (ReValidate)
{
cp.AppendCacheExtension("must-revalidate");
cp.AppendCacheExtension("proxy-revalidate");
}
cp.SetCacheability(CacheKind);
cp.SetOmitVaryStar(false);
if (LastModified != null)
{
cp.SetLastModified(LastModified.Value);
}
cp.SetExpires(DateTime.UtcNow.AddHours(MaxClientCacheAgeInHours));
if (Etag != null)
{
cp.SetETag(Etag);
}
}
public void Apply(HttpCachePolicyBase policy)
{
policy.ThrowIfNull("policy");
if (!_hasPolicy)
{
return;
}
switch (_cacheability)
{
case HttpCacheability.NoCache:
policy.SetCacheability(_allowsServerCaching == true ? HttpCacheability.ServerAndNoCache : HttpCacheability.NoCache);
break;
case HttpCacheability.Private:
policy.SetCacheability(_allowsServerCaching == true ? HttpCacheability.ServerAndPrivate : HttpCacheability.Private);
break;
case HttpCacheability.Public:
policy.SetCacheability(HttpCacheability.Public);
break;
}
if (_noStore == true)
{
policy.SetNoStore();
}
if (_noTransforms == true)
{
policy.SetNoTransforms();
}
if (_clientCacheExpirationUtcTimestamp != null)
{
policy.SetExpires(_clientCacheExpirationUtcTimestamp.Value);
}
if (_clientCacheMaxAge != null)
{
policy.SetMaxAge(_clientCacheMaxAge.Value);
}
if (_allowResponseInBrowserHistory != null)
{
policy.SetAllowResponseInBrowserHistory(_allowResponseInBrowserHistory.Value);
}
if (_eTag != null)
{
policy.SetETag(_eTag);
}
if (_omitVaryStar != null)
{
policy.SetOmitVaryStar(_omitVaryStar.Value);
}
if (_proxyMaxAge != null)
{
policy.SetProxyMaxAge(_proxyMaxAge.Value);
}
if (_revalidation != null)
{
policy.SetRevalidation(_revalidation.Value);
}
}
private void HandleCaching(HttpCachePolicyBase cache, string etag)
{
cache.SetCacheability(System.Web.HttpCacheability.Public);
//cache.SetExpires(DateTime.Now.AddDays(7));
cache.SetMaxAge(TimeSpan.FromDays(7));
cache.SetETag(etag);
//cache.SetValidUntilExpires(false);
cache.VaryByParams["id"] = true;
cache.VaryByParams["size"] = true;
//cache.SetLastModified(DateTime.SpecifyKind(picture.UpdatedOnUtc, DateTimeKind.Utc));
}
protected override void SendMediaHeaders(Media media, HttpContextBase context)
{
GetResponseCacheHeadersArgs args = new GetResponseCacheHeadersArgs(media.MediaData.MediaItem.InnerItem, new ResponseCacheHeaders()
{
Vary = this.GetVaryHeader(media, context)
})
{
RequestType = new RequestTypes?(RequestTypes.Media)
};
GetResponseCacheHeadersPipeline.Run(args);
HttpCachePolicyBase cache = context.Response.Cache;
if (args.CacheHeaders.LastModifiedDate.HasValue)
{
cache.SetLastModified(args.CacheHeaders.LastModifiedDate.Value);
}
if (!string.IsNullOrEmpty(args.CacheHeaders.ETag))
{
cache.SetETag(args.CacheHeaders.ETag);
}
if (args.CacheHeaders.Cacheability.HasValue)
{
cache.SetCacheability(args.CacheHeaders.Cacheability.Value);
}
if (args.CacheHeaders.MaxAge.HasValue)
{
cache.SetMaxAge(args.CacheHeaders.MaxAge.Value);
}
if (args.CacheHeaders.ExpirationDate.HasValue)
{
cache.SetExpires(args.CacheHeaders.ExpirationDate.Value);
}
if (!string.IsNullOrEmpty(args.CacheHeaders.CacheExtension))
{
cache.AppendCacheExtension(args.CacheHeaders.CacheExtension);
}
if (string.IsNullOrEmpty(args.CacheHeaders.Vary))
{
return;
}
context.Response.AppendHeader("vary", args.CacheHeaders.Vary);
}
protected void SendOuptToClient(HttpContextBase context)
{
HttpResponseBase response = context.Response;
HttpCachePolicyBase cache = context.Response.Cache;
cache.SetETag(_etagCacheKey);
cache.SetLastModified(_lastModify);
cache.SetExpires(NetworkTime.Now.AddDays(_durationInDays)); // For HTTP 1.0 browsers
cache.SetOmitVaryStar(true);
cache.SetMaxAge(TimeSpan.FromDays(_durationInDays));
//cache.SetLastModified(NetworkTime.Now);
cache.SetValidUntilExpires(true);
cache.SetCacheability(HttpCacheability.Public);
cache.SetRevalidation(HttpCacheRevalidation.AllCaches);
cache.VaryByHeaders["Accept-Encoding"] = true;// Tell proxy to cache different versions depending on Accept-Encoding
response.ContentType = "application/json";
if (response.IsClientConnected)
{
response.Flush();
}
}
public static void Apply(this HttpCacheOptions options, HttpCachePolicyBase policy)
{
if (policy == null)
{
return;
}
policy.SetCacheability(options.IsPublic ? HttpCacheability.Public : HttpCacheability.Private);
if (options.LastModified.HasValue)
{
policy.SetLastModified(options.LastModified.Value);
}
if (!string.IsNullOrEmpty(options.ETag))
{
policy.SetETag(options.QuotedETag);
}
if (options.MaxAge.HasValue)
{
policy.SetMaxAge(options.MaxAge.Value);
}
}
public void ProcessRequest(HttpContextBase context)
{
this._context = context;
HttpRequestBase request = context.Request;
HttpResponseBase response = context.Response;
Uri url = request.Url;
string str = !(url == (Uri)null) ? url.LocalPath : throw new HttpException(500, BundleTransformer.Core.Resources.Strings.Common_ValueIsNull);
if (string.IsNullOrWhiteSpace(str))
{
throw new HttpException(500, BundleTransformer.Core.Resources.Strings.Common_ValueIsEmpty);
}
if (!this._virtualFileSystemWrapper.FileExists(str))
{
throw new HttpException(404, string.Format(BundleTransformer.Core.Resources.Strings.Common_FileNotExist, (object)str));
}
string bundleVirtualPath = request.QueryString[Common.BundleVirtualPathQueryStringParameterName];
if (string.IsNullOrWhiteSpace(bundleVirtualPath) && this.IsStaticAsset)
{
AssetHandlerBase.ProcessStaticAssetRequest(context);
}
else
{
string processedAssetContent;
try
{
processedAssetContent = this.GetProcessedAssetContent(str, bundleVirtualPath);
}
catch (HttpException ex)
{
throw;
}
catch (AssetTranslationException ex)
{
throw new HttpException(500, ex.Message, (Exception)ex);
}
catch (AssetPostProcessingException ex)
{
throw new HttpException(500, ex.Message, (Exception)ex);
}
catch (FileNotFoundException ex)
{
throw new HttpException(500, string.Format(BundleTransformer.Core.Resources.Strings.AssetHandler_DependencyNotFound, (object)ex.Message, (object)ex));
}
catch (Exception ex)
{
throw new HttpException(500, string.Format(BundleTransformer.Core.Resources.Strings.AssetHandler_UnknownError, (object)ex.Message, (object)ex));
}
HttpCachePolicyBase cache = response.Cache;
if (this._assetHandlerConfig.DisableClientCache)
{
response.StatusCode = 200;
response.StatusDescription = "OK";
cache.SetCacheability(HttpCacheability.NoCache);
cache.SetExpires(DateTime.UtcNow.AddYears(-1));
cache.SetValidUntilExpires(false);
cache.SetNoStore();
cache.SetNoServerCaching();
response.ContentType = this.ContentType;
response.Write(processedAssetContent);
}
else
{
string assetEtag = AssetHandlerBase.GenerateAssetETag(processedAssetContent);
int num = AssetHandlerBase.IsETagHeaderChanged(request, assetEtag) ? 1 : 0;
if (num != 0)
{
response.StatusCode = 200;
response.StatusDescription = "OK";
}
else
{
response.StatusCode = 304;
response.StatusDescription = "Not Modified";
response.AddHeader("Content-Length", "0");
}
response.AddHeader("X-Asset-Transformation-Powered-By", "Bundle Transformer");
cache.SetCacheability(HttpCacheability.Public);
cache.SetExpires(DateTime.UtcNow.AddYears(-1));
cache.SetValidUntilExpires(true);
cache.AppendCacheExtension("must-revalidate");
cache.SetNoServerCaching();
cache.VaryByHeaders["If-None-Match"] = true;
cache.SetETag(assetEtag);
if (num != 0)
{
response.ContentType = this.ContentType;
response.Write(processedAssetContent);
}
}
context.ApplicationInstance.CompleteRequest();
}
}
/// <summary>
/// 设置内容标识
/// </summary>
/// <param name="etag">用于标识内容的哈希值</param>
public override void SetETag(string etag)
{
_cachePolicy.SetETag(etag);
}
void SetLongLivedCacheHeaders(HttpCachePolicyBase cache, string serverETag)
{
cache.SetCacheability(HttpCacheability.Public);
cache.SetETag(serverETag);
cache.SetExpires(DateTime.UtcNow.AddYears(1));
}
