private CacheEntry GetCacheEntry(string key)
{
try
{
_memoryCache.TryGetValue(key, out CacheEntry cacheEntry);
string fileName = null;
if (cacheEntry == null)
{
fileName = GetFileName(key);
if (!File.Exists(fileName))
{
return(null);
}
byte[] file = File.ReadAllBytes(fileName);
cacheEntry = CacheEntry.Deserialize(file);
_memoryCache[key] = cacheEntry;
_esimatedUsedMemoryBytes += (cacheEntry as ResponseCacheEntry)?.Body?.Length ?? 0;
PurgeExcessMemoryAsync();
}
if (cacheEntry.Created.Add(cacheEntry.ValidFor) < DateTime.UtcNow || cacheEntry.ServerVersion != _versionIdentifier)
{
_memoryCache[key] = null;
_esimatedUsedMemoryBytes -= (cacheEntry as ResponseCacheEntry)?.Body?.Length ?? 0;
if (fileName != null)
{
File.Delete(fileName);
}
return(null);
}
cacheEntry.LastAccessed = DateTime.UtcNow;
return(cacheEntry);
}
catch
{
}
return(null);
}