public CachedAssetEntry InsertAsset(string virtualPath, IEnumerable <string> virtualPathDependencies, string content, params string[] processorCodes)
{
if (!_isEnabled)
{
return(null);
}
Guard.NotEmpty(virtualPath, nameof(virtualPath));
Guard.NotEmpty(content, nameof(content));
var cacheDirectoryName = ResolveCacheDirectoryName(virtualPath, out string themeName, out int storeId);
using (KeyedLock.Lock(BuildLockKey(cacheDirectoryName)))
{
CacheFolder.CreateDirectory(cacheDirectoryName);
try
{
// Save main content file
// TODO: determine correct file extension
CreateFileFromEntries(cacheDirectoryName, "asset.css", new[] { content });
// Save dependencies file
var deps = ResolveVirtualPathDependencies(virtualPath, virtualPathDependencies, themeName);
CreateFileFromEntries(cacheDirectoryName, "asset.dependencies", deps);
// Save hash file
var currentHash = BundleTable.VirtualPathProvider.GetFileHash(virtualPath, deps);
CreateFileFromEntries(cacheDirectoryName, "asset.hash", new[] { currentHash });
// Save codes file
CreateFileFromEntries(cacheDirectoryName, "asset.pcodes", processorCodes);
var entry = new CachedAssetEntry
{
Content = content,
HashCode = currentHash,
OriginalVirtualPath = virtualPath,
VirtualPathDependencies = deps,
PhysicalPath = CacheFolder.MapPath(cacheDirectoryName),
ThemeName = themeName,
StoreId = storeId,
ProcessorCodes = processorCodes
};
SetupEvictionObserver(entry);
Logger.DebugFormat("Succesfully inserted asset '{0}' to cache.", virtualPath);
return(entry);
}
catch (Exception ex)
{
Logger.ErrorFormat(ex, "Error while inserting asset '{0}' to the asset cache.", virtualPath);
InvalidateAssetInternal(cacheDirectoryName, themeName, storeId);
}
}
return(null);
}
/// <summary>
/// Invalidates a cached asset when any themevar was changed or the theme was touched on file system
/// </summary>
/// <param name="entry"></param>
private static void SetupEvictionObserver(CachedAssetEntry entry)
{
if (entry.ThemeName == null)
{
return;
}
var cacheKey = CacheKeyPrefix + "{0}:{1}".FormatInvariant(entry.ThemeName, entry.StoreId);
var cacheDependency = new CacheDependency(
new string[0],
new[] { FrameworkCacheConsumer.BuildThemeVarsCacheKey(entry.ThemeName, entry.StoreId) },
DateTime.UtcNow);
HttpRuntime.Cache.Insert(
cacheKey,
entry.PhysicalPath,
cacheDependency,
Cache.NoAbsoluteExpiration,
Cache.NoSlidingExpiration,
CacheItemPriority.Default,
OnCacheItemRemoved);
}
public CachedAssetEntry GetAsset(string virtualPath)
{
if (!_isEnabled)
{
return(null);
}
Guard.NotEmpty(virtualPath, nameof(virtualPath));
var cacheDirectoryName = ResolveCacheDirectoryName(virtualPath, out string themeName, out int storeId);
if (CacheFolder.DirectoryExists(cacheDirectoryName))
{
try
{
var deps = CacheFolder.ReadFile(CacheFolder.Combine(cacheDirectoryName, "asset.dependencies"));
var hash = CacheFolder.ReadFile(CacheFolder.Combine(cacheDirectoryName, "asset.hash"));
if (!TryValidate(virtualPath, deps, hash, out IEnumerable <string> parsedDeps, out string currentHash))
{
Logger.DebugFormat("Invalidating cached asset for '{0}' because it is not valid anymore.", virtualPath);
InvalidateAssetInternal(cacheDirectoryName, themeName, storeId);
return(null);
}
// TODO: determine correct file extension
var content = CacheFolder.ReadFile(CacheFolder.Combine(cacheDirectoryName, "asset.css"));
if (content == null)
{
using (KeyedLock.Lock(BuildLockKey(cacheDirectoryName)))
{
InvalidateAssetInternal(cacheDirectoryName, themeName, storeId);
return(null);
}
}
var codes = ParseFileContent(CacheFolder.ReadFile(CacheFolder.Combine(cacheDirectoryName, "asset.pcodes")));
var entry = new CachedAssetEntry
{
Content = content,
HashCode = currentHash,
OriginalVirtualPath = virtualPath,
VirtualPathDependencies = parsedDeps,
PhysicalPath = CacheFolder.MapPath(cacheDirectoryName),
ThemeName = themeName,
StoreId = storeId,
ProcessorCodes = codes.ToArray()
};
SetupEvictionObserver(entry);
Logger.DebugFormat("Succesfully read asset '{0}' from cache.", virtualPath);
return(entry);
}
catch (Exception ex)
{
Logger.ErrorFormat(ex, "Error while resolving asset '{0}' from the asset cache.", virtualPath);
}
}
return(null);
}