private static byte[] GetChecksumAndSizeFromUri(Uri uri, out long size)
{
size = 0;
var groups = ChecksumRegex.Match(uri.ToString()).Groups;
if (groups.Count != 3)
{
return(null);
}
size = long.Parse(groups[1].Value);
var checksumAsString = groups[2].Value;
var result = new byte[20];
for (var i = 0; i < result.Length; i++)
{
result[i] = byte.Parse(new string(new[] { checksumAsString[2 * i], checksumAsString[2 * i + 1] }), NumberStyles.HexNumber);
}
return(result);
}
private static bool TryGetChecksumAndSizeFromUri(Uri uri, out byte[] checksum, out long size)
{
size = 0;
checksum = null;
var groups = ChecksumRegex.Match(uri.ToString()).Groups;
if (groups.Count != 3)
{
return(false);
}
// regex check above ensures that all the data below is parsable
size = long.Parse(groups[1].Value);
var checksumAsString = groups[2].Value;
checksum = new byte[20];
for (var i = 0; i < checksum.Length; i++)
{
checksum[i] = byte.Parse(checksumAsString.Substring(2 * i, 2), NumberStyles.HexNumber);
}
return(true);
}
