// From : https://github.com/confluentinc/confluent-kafka-dotnet/issues/1307
static string DecodeMemberAssignment(byte[] b)
{
/*
* https://kafka.apache.org/protocol
* STRING Represents a sequence of characters. First the length N is given as an INT16. Then N bytes follow which are the UTF-8 encoding of the character sequence. Length must not be negative.
* INT16 Represents an integer between -2^15 and 2^15-1 inclusive. The values are encoded using two bytes in network byte order (big-endian).
* INT32 Represents an integer between -2^31 and 2^31-1 inclusive. The values are encoded using four bytes in network byte order (big-endian).
* BYTES Represents a raw sequence of bytes. First the length N is given as an INT32. Then N bytes follow.
*
* https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol
* MemberAssignment => Version PartitionAssignment
* Version => int16
* PartitionAssignment => [Topic [Partition]]
* Topic => string
* Partition => int32
* UserData => bytes
*
* Note: [] probably denotes a sequence of same type items, begining with Int32 of the # of such items
*/
UTF8Encoding enc = new UTF8Encoding();
StringBuilder s = new StringBuilder();
try
{
short version = SwapEndianness(BitConverter.ToInt16(b, 0));
int num_topic_assignments = SwapEndianness(BitConverter.ToInt32(b, 2));
int i = 6;
for (int t = 0; t < num_topic_assignments; t++)
{
short topic_len = SwapEndianness(BitConverter.ToInt16(b, i));
byte[] str = new byte[topic_len];
Array.Copy(b, i + 2, str, 0, topic_len);
string topic = enc.GetString(str);
i += (topic_len + 2);
int num_partition = SwapEndianness(BitConverter.ToInt32(b, i));
if (s.Length > 0)
{
s.Append($"; ");
}
s.Append($"{topic}: ");
for (int j = 0; j < num_partition; j++)
{
i += 4;
s.Append(
$"{SwapEndianness(BitConverter.ToInt32(b, i))}{(j < num_partition - 1 ? "," : "")}");
}
}
return(s.ToString());
}
catch
{
return("");
}
}
public void ReadableSwap_GivenUint_ReturnUintWithSwappedEndianness(uint value, uint expected)
{
// Arrange
var swapEndianness = new SwapEndianness();
// Act
var result = swapEndianness.ReadableSwap(value);
// Assert
result.Should().Be(expected);
}