| private static FormatBytes ( byte value ) : string | ||
| value | byte | |
| return | string | |
/// <summary>
/// Generates a unique hash from byte[]
/// </summary>
/// <param name="buffer"></param>
/// <returns></returns>
protected static string ComputeHash(byte[] value)
{
byte[] hash;
lock (HashProvider)
{
// generate hash
hash = HashProvider.ComputeHash(value);
}
// convert hash to string
return(ETag.FormatBytes(hash));
}
/// <summary>
/// Sets ETag.Value
/// </summary>
/// <param name="Entity"></param>
protected virtual string CalculateETag()
{
bool isHash;
object metaData = this.GetMetaData(out isHash);
string etag;
if (metaData is Guid)
{
etag = ((Guid)metaData).ToString("N");
}
else if (metaData is string)
{
if (isHash)
{
etag = (string)metaData;
}
else
{
etag = ETag.ComputeHash((string)metaData);
}
}
else if (metaData is byte[])
{
if (isHash)
{
etag = ETag.FormatBytes((byte[])metaData);
}
else
{
etag = ETag.ComputeHash((byte[])metaData);
}
}
else if (metaData is Stream)
{
etag = ETag.ComputeHash((Stream)metaData);
}
else
{
throw new NotSupportedException("GetMetaData must return Guid, String, Byte[], or Stream");
}
return("\"" + etag + "\"");
}
