public void ReadAndPositionTest()
{
ReceiveBuffer target = new ReceiveBuffer(); // TODO: 初始化为适当的值
var bytes = new byte[] {
1,
3,
0, 1,
0, 0, 0, 1,
0, 0, 0, 0, 0, 0, 0, 5,
255,
255, 255
};
target.Add(bytes, 0, bytes.Length);
target.Position = 0;
Assert.IsTrue(target.ReadBoolean() && target.Position == 1);
Assert.IsTrue(target.ReadByte() == 3 && target.Position == 1 + 1);
Assert.IsTrue(target.ReadInt16() == 1 && target.Position == 1 + 1 + 2);
Assert.IsTrue(target.ReadInt32() == 1 && target.Position == 1 + 1 + 2 + 4);
Assert.IsTrue(target.ReadInt64() == 5 && target.Position == 1 + 1 + 2 + 4 + 8);
Assert.IsTrue(target.ReadArray(1)[0] == 255 && target.Position == 1 + 1 + 2 + 4 + 8 + 1);
Assert.IsTrue(target.ReadArray().Length == 2 && target.Position == 1 + 1 + 2 + 4 + 8 + 1 + 2);
}
/// <summary>
/// 解析一个数据包
/// 不足一个封包时返回null
/// </summary>
/// <param name="buffer">接收到的历史数据</param>
/// <exception cref="ProtocolException"></exception>
/// <returns></returns>
public static FastPacket From(ReceiveBuffer buffer)
{
if (buffer.Length < 4)
{
return(null);
}
buffer.Position = 0;
var totalBytes = buffer.ReadInt32();
const int packegMaxSize = 10 * 1204 * 1024; // 10M
if (totalBytes > packegMaxSize)
{
throw new ProtocolException();
}
// 少于15字节是异常数据，清除收到的所有数据
const int packetMinSize = 15;
if (totalBytes < packetMinSize)
{
throw new ProtocolException();
}
// 数据包未接收完整
if (buffer.Length < totalBytes)
{
return(null);
}
// api名称数据长度
var apiNameLength = buffer.ReadByte();
if (totalBytes < apiNameLength + packetMinSize)
{
throw new ProtocolException();
}
// api名称数据
var apiNameBytes = buffer.ReadArray(apiNameLength);
// 标识符
var id = buffer.ReadInt64();
// 是否为客户端封包
var isFromClient = buffer.ReadBoolean();
// 是否异常
var isException = buffer.ReadBoolean();
// 实体数据
var body = buffer.ReadArray(totalBytes - buffer.Position);
// 清空本条数据
buffer.Clear(totalBytes);
var apiName = Encoding.UTF8.GetString(apiNameBytes);
var packet = new FastPacket(apiName, id, isFromClient)
{
TotalBytes = totalBytes,
ApiNameLength = apiNameLength,
IsException = isException,
Body = body
};
return(packet);
}
/// <summary>
/// 解析一个数据包
/// 不足一个封包时返回null
/// </summary>
/// <param name="buffer">接收到的历史数据</param>
/// <exception cref="ProtocolException"></exception>
/// <returns></returns>
public static FastPacket From(ReceiveBuffer buffer)
{
if (buffer.Length < 4)
{
return null;
}
buffer.Position = 0;
var totalBytes = buffer.ReadInt32();
const int packegMaxSize = 10 * 1204 * 1024; // 10M
if (totalBytes > packegMaxSize)
{
throw new ProtocolException();
}
// 少于15字节是异常数据，清除收到的所有数据
const int packetMinSize = 15;
if (totalBytes < packetMinSize)
{
throw new ProtocolException();
}
// 数据包未接收完整
if (buffer.Length < totalBytes)
{
return null;
}
// api名称数据长度
var apiNameLength = buffer.ReadByte();
if (totalBytes < apiNameLength + packetMinSize)
{
throw new ProtocolException();
}
// api名称数据
var apiNameBytes = buffer.ReadArray(apiNameLength);
// 标识符
var id = buffer.ReadInt64();
// 是否为客户端封包
var isFromClient = buffer.ReadBoolean();
// 是否异常
var isException = buffer.ReadBoolean();
// 实体数据
var body = buffer.ReadArray(totalBytes - buffer.Position);
// 清空本条数据
buffer.Clear(totalBytes);
var apiName = Encoding.UTF8.GetString(apiNameBytes);
var packet = new FastPacket(apiName, id, isFromClient)
{
TotalBytes = totalBytes,
ApiNameLength = apiNameLength,
IsException = isException,
Body = body
};
return packet;
}
