/// <summary>
/// Retrieves blob object from database.
/// </summary>
/// <param name="key"></param>
/// <returns>
/// null when no blob found
/// </returns>
public static Blob RetrieveBlob(HashKey key)
{
string fileName = key.ToString();
string fileContent = ReadFileContent(fileName);
if (fileContent == null)
{
return(null);
}
return(Blob.ParseFromString(fileContent));
}