public void Set(string key, CacheItem cacheItem)
{
_workContext.HttpContext.Cache.Add(
key,
cacheItem,
null,
cacheItem.ValidUntilUtc,
System.Web.Caching.Cache.NoSlidingExpiration,
System.Web.Caching.CacheItemPriority.Normal,
null);
}
public void Set(string key, CacheItem cacheItem) {
var record = _repository.Table.FirstOrDefault(x => x.CacheKey == key);
if (record == null) {
record = new CacheItemRecord();
Convert(cacheItem, record);
_repository.Create(record);
return;
}
Convert(cacheItem, record);
}
private void Convert(CacheItem cacheItem, CacheItemRecord record) {
record.CacheKey = cacheItem.CacheKey;
record.CachedOnUtc = cacheItem.CachedOnUtc;
record.ContentType = cacheItem.ContentType;
record.InvariantCacheKey = cacheItem.InvariantCacheKey;
record.Output = cacheItem.Output;
record.QueryString = cacheItem.QueryString;
record.StatusCode = cacheItem.StatusCode;
record.Tags = String.Join(";", cacheItem.Tags);
record.Tenant = cacheItem.Tenant;
record.Url = cacheItem.Url;
record.ValidUntilUtc = cacheItem.ValidUntilUtc;
}
private CacheItem Convert(CacheItemRecord record) {
var cacheItem = new CacheItem();
cacheItem.CacheKey = record.CacheKey;
cacheItem.CachedOnUtc = record.CachedOnUtc;
cacheItem.ContentType = record.ContentType;
cacheItem.InvariantCacheKey = record.InvariantCacheKey;
cacheItem.Output = record.Output;
cacheItem.QueryString = record.QueryString;
cacheItem.StatusCode = record.StatusCode;
cacheItem.Tags = record.Tags.Split(';');
cacheItem.Tenant = record.Tenant;
cacheItem.Url = record.Url;
cacheItem.ValidUntilUtc = record.ValidUntilUtc;
return cacheItem;
}
/// <summary>
/// Define valid cache control values
/// </summary>
private void ApplyCacheControl(CacheItem cacheItem, HttpResponseBase response, string content)
{
if (_maxAge > 0) {
var maxAge = new TimeSpan(0, 0, 0, _maxAge); //cacheItem.ValidUntilUtc - _clock.UtcNow;
if (maxAge.TotalMilliseconds < 0) {
maxAge = TimeSpan.FromSeconds(0);
}
response.Cache.SetCacheability(HttpCacheability.Public);
response.Cache.SetMaxAge(maxAge);
}
response.Cache.SetETag(content.GetHashCode().ToString(CultureInfo.InvariantCulture));
response.Cache.SetOmitVaryStar(true);
// different tenants with the same urls have different entries
response.Cache.VaryByHeaders["HOST"] = true;
// Set the Vary: Accept-Encoding response header.
// This instructs the proxies to cache two versions of the resource: one compressed, and one uncompressed.
// The correct version of the resource is delivered based on the client request header.
// This is a good choice for applications that are singly homed and depend on public proxies for user locality.
response.Cache.VaryByHeaders["Accept-Encoding"] = true;
// create a unique cache per browser, in case a Theme is rendered differently (e.g., mobile)
// c.f. http://msdn.microsoft.com/en-us/library/aa478965.aspx
// c.f. http://stackoverflow.com/questions/6007287/outputcache-varybyheader-user-agent-or-varybycustom-browser
response.Cache.SetVaryByCustom("browser");
// enabling this would create an entry for each different browser sub-version
// response.Cache.VaryByHeaders.UserAgent = true;
}
public void OnResultExecuted(ResultExecutedContext filterContext)
{
var response = filterContext.HttpContext.Response;
// save the result only if the content can be intercepted
if (_filter == null) return;
// only for ViewResult right now, as we don't want to handle redirects, HttpNotFound, ...
if (filterContext.Result as ViewResultBase == null) {
Logger.Debug("Ignoring none ViewResult response");
return;
}
// check if there is a specific rule not to cache the whole route
var configurations = _cacheService.GetRouteConfigurations();
var route = filterContext.Controller.ControllerContext.RouteData.Route;
var key = _cacheService.GetRouteDescriptorKey(filterContext.HttpContext, route);
var configuration = configurations.FirstOrDefault(c => c.RouteKey == key);
// do not cache ?
if (configuration != null && configuration.Duration == 0)
{
return;
}
// ignored url ?
if (IsIgnoredUrl(filterContext.RequestContext.HttpContext.Request.AppRelativeCurrentExecutionFilePath, _ignoredUrls))
{
return;
}
// get contents
response.Flush();
var output = _filter.GetContents(response.ContentEncoding);
if (String.IsNullOrWhiteSpace(output))
{
return;
}
var tokenIndex = output.IndexOf(AntiforgeryTag, StringComparison.Ordinal);
// substitute antiforgery token by a beacon
if (tokenIndex != -1)
{
var tokenEnd = output.IndexOf(">", tokenIndex, StringComparison.Ordinal);
var sb = new StringBuilder();
sb.Append(output.Substring(0, tokenIndex));
sb.Append(AntiforgeryBeacon);
sb.Append(output.Substring(tokenEnd + 1));
output = sb.ToString();
}
// default duration of specific one ?
var cacheDuration = configuration != null && configuration.Duration.HasValue ? configuration.Duration.Value : _cacheDuration;
// include each of the content item ids as tags for the cache entry
var contentItemIds = _displayedContentItemHandler.GetDisplayed().Select(x => x.ToString(CultureInfo.InvariantCulture)).ToArray();
var cacheItem = new CacheItem
{
ContentType = response.ContentType,
StatusCode = response.StatusCode,
CachedOnUtc = _now,
ValidUntilUtc = _now.AddSeconds(cacheDuration),
QueryString = filterContext.HttpContext.Request.Url.Query,
Output = output,
CacheKey = _cacheKey,
InvariantCacheKey = _invariantCacheKey,
Tenant = _shellSettings.Name,
Url = filterContext.HttpContext.Request.Url.AbsolutePath,
Tags = new[] { _invariantCacheKey }.Union(contentItemIds).ToArray()
};
ApplyCacheControl(cacheItem, response, output);
Logger.Debug("Cache item added: " + cacheItem.CacheKey);
// remove old cache data
_cacheService.RemoveByTag(_invariantCacheKey);
// add data to cache
_cacheStorageProvider.Set(_cacheKey, cacheItem);
// add to the tags index
foreach (var tag in cacheItem.Tags) {
_tagCache.Tag(tag, _cacheKey);
}
}
public void OnResultExecuted(ResultExecutedContext filterContext)
{
var response = filterContext.HttpContext.Response;
// save the result only if the content can be intercepted
if (_filter == null) return;
// only for ViewResult right now, as we don't want to handle redirects, HttpNotFound, ...
if (filterContext.Result as ViewResultBase == null) {
Logger.Debug("Ignoring none ViewResult response");
return;
}
// check if there is a specific rule not to cache the whole route
var configurations = _cacheService.GetRouteConfigurations();
var route = filterContext.Controller.ControllerContext.RouteData.Route;
var key = _cacheService.GetRouteDescriptorKey(filterContext.HttpContext, route);
var configuration = configurations.FirstOrDefault(c => c.RouteKey == key);
// do not cache ?
if (configuration != null && configuration.Duration == 0)
{
return;
}
// ignored url ?
if (IsIgnoredUrl(filterContext.RequestContext.HttpContext.Request.AppRelativeCurrentExecutionFilePath, _ignoredUrls))
{
return;
}
// get contents
response.Flush();
var output = _filter.GetContents(response.ContentEncoding);
if (String.IsNullOrWhiteSpace(output))
{
return;
}
var tokenIndex = output.IndexOf(AntiforgeryTag, StringComparison.Ordinal);
// substitute antiforgery token by a beacon
if (tokenIndex != -1)
{
var tokenEnd = output.IndexOf(">", tokenIndex, StringComparison.Ordinal);
var sb = new StringBuilder();
sb.Append(output.Substring(0, tokenIndex));
sb.Append(AntiforgeryBeacon);
sb.Append(output.Substring(tokenEnd + 1));
output = sb.ToString();
}
// default duration of specific one ?
var cacheDuration = configuration != null && configuration.Duration.HasValue ? configuration.Duration.Value : _cacheDuration;
var cacheItem = new CacheItem
{
ContentType = response.ContentType,
StatusCode = response.StatusCode,
CachedOnUtc = _now,
ValidUntilUtc = _now.AddSeconds(cacheDuration),
QueryString = filterContext.HttpContext.Request.Url.Query,
Output = output,
CacheKey = _cacheKey,
InvariantCacheKey = _invariantCacheKey,
Tenant = _shellSettings.Name,
Url = filterContext.HttpContext.Request.Url.AbsolutePath
};
ApplyCacheControl(cacheItem, response, output);
Logger.Debug("Cache item added: " + cacheItem.CacheKey);
// remove old cache data
RemoveFromCache(filterContext.HttpContext, item => item.InvariantCacheKey.Equals(_invariantCacheKey, StringComparison.OrdinalIgnoreCase));
// add data to cache
filterContext.HttpContext.Cache.Add(
_cacheKey,
cacheItem,
null,
cacheItem.ValidUntilUtc,
System.Web.Caching.Cache.NoSlidingExpiration,
System.Web.Caching.CacheItemPriority.Normal,
null);
}