private void GenerateCacheIfNeed(string domain)
{
if (!hmacFuncCache.ContainsKey(domain))
{
var hmac = new HMACSHA256(Encoding.UTF8.GetBytes(domain));
Func <string, string> onHash = (string input) =>
{
var rawBytes = hmac.ComputeHash(Encoding.UTF8.GetBytes(input));
return(Convert.ToBase64String(rawBytes).Replace("/", "_").Replace("+", "_").Replace("=", "_"));
};
hmacFuncCache[domain] = onHash;
}
if (!onMemoryHeadCountCache.ContainsKey(domain))
{
onMemoryHeadCountCache[domain] = new Dictionary <Char, int>();
}
if (onMemoryHeadCountCache[domain].Count == 0)
{
// オンメモリキャッシュが空なので、ファイルがあればそこから生成する。
var folderPaths = filePersist.DirectoryNamesInDomain(domain);
foreach (var folderPath in folderPaths)
{
var initial = folderPath[folderPath.Length - 1];
var fileCount = filePersist.FileNamesInDomain(folderPath).Length;
onMemoryHeadCountCache[domain][initial] = fileCount;
}
return;
}
}
public void PurgeCache(string storePath, string urlWithoutHash)
{
var deleteTargetPath = Path.Combine(storePath, GenerateFolderAndFilePath(urlWithoutHash, string.Empty, storePath).url);
var filePaths = filePersist.FileNamesInDomain(deleteTargetPath);
if (filePaths.Any())
{
// remove from hard cache.
filePersist.DeleteByDomain(deleteTargetPath);
// remove from on memory cache.
var filePath = Path.Combine(deleteTargetPath, Path.GetFileName(filePaths[0]));
if (pathObjectCache.ContainsKey(filePath))
{
pathObjectCache.Remove(filePath);
}
}
}