/// <summary>
/// 解析
/// </summary>
/// <param name="header"></param>
/// <param name="br"></param>
/// <param name="srcEndPoint"></param>
public ResourceRequestMessage(CommonHeader header, BinaryReader br, System.Net.IPEndPoint srcEndPoint)
: base(header, srcEndPoint)
{
this.ContextId = br.ReadInt32();
this.Position = br.ReadInt64();
this.Size = br.ReadInt32();
}
/// <summary>
/// 解析
/// </summary>
/// <param name="header"></param>
/// <param name="br"></param>
/// <param name="srcEndPoint"></param>
public ResourceResponseMessage(CommonHeader header, BinaryReader br, System.Net.IPEndPoint srcEndPoint)
: base(header, srcEndPoint)
{
this.ContextId = br.ReadInt32();
this.Position = br.ReadInt64();
this.Size = br.ReadInt32();
//此处不再拷贝数据,在写数据时指定位置写,减少拷贝次数
//if (this.Size > 0)
//{
// this.Data = new byte[this.Size];
// br.Read(this.Data, 0, this.Data.Length);
//}
}
/// <summary>
/// 解析
/// </summary>
/// <param name="header"></param>
/// <param name="br"></param>
/// <param name="srcEndPoint"></param>
public SendDataNotifyMessage(CommonHeader header, BinaryReader br, System.Net.IPEndPoint srcEndPoint)
: base(header, srcEndPoint)
{
this.Priority = br.ReadInt16();
this.ResourceType = br.ReadByte();
this.Timeout = br.ReadInt32();
Int16 fileNameLen = br.ReadInt16();
if (fileNameLen > 0)
{
byte[] fileNameBuf = new byte[fileNameLen];
br.Read(fileNameBuf, 0, fileNameBuf.Length);
this.FileName = Encoding.UTF8.GetString(fileNameBuf);
}
this.Size = br.ReadInt64();
if (this.ResourceType == ResourceTypeConstant.Message)
{
this.Data = new byte[this.Size];
br.Read(this.Data, 0, this.Data.Length);
}
}
/// <summary>
/// 解析
/// </summary>
/// <param name="header"></param>
/// <param name="br"></param>
/// <param name="srcEndPoint"></param>
public TransferCompletedAckMessage(CommonHeader header, BinaryReader br, System.Net.IPEndPoint srcEndPoint)
: base(header, srcEndPoint)
{
}
/// <summary>
/// 解析收到的数据队列线程方法
/// </summary>
/// <param name="receiveDatagramInfo">要解析的数据</param>
private void ProReceiveData(ReceiveDatagramInfo receiveDatagramInfo)
{
try
{
var data = receiveDatagramInfo.Data;
if (data == null)
{
return;
}
if (data.Length < TransferConstant.COMMON_HEADER_SIZE)
{
Loger.Warn($"收到的数据长度[{data.Length}]小于公共头[{TransferConstant.COMMON_HEADER_SIZE}],忽略...");
return;
}
var srcEndPoint = receiveDatagramInfo.SrcEndPoint;
using (var ms = new MemoryStream(data))
{
var br = new BinaryReader(ms);
#region 数据验证
Int32 sync = br.ReadInt32();// 同步字
if (sync != TransferConstant.SYNC)
{
throw new Exception($"收到数据的同步头:{sync}与期望的同步头:{TransferConstant.SYNC}不一致,忽略");
}
Int32 packageLen = br.ReadInt32();// 本次传输数据总长度
if (packageLen != data.Length)
{
throw new Exception($"收到数据的长度:{data.Length}与期望的数据长度:{packageLen}不一致,忽略");
}
var p = br.BaseStream.Position;
Int32 validCode = br.ReadInt32();//校验码,以后再验证
//重置校验码为填充值
byte[] validCodeBuf = BitConverter.GetBytes(TransferConstant.VALID_CODE_FILL);
br.BaseStream.Seek(p, SeekOrigin.Begin);
br.BaseStream.Write(validCodeBuf, 0, validCodeBuf.Length);
//校验数据传输正确性
bool parseResult = ProtocolParser.ValidData(validCode, data);
if (!parseResult)
{
Loger.Warn("数据正确性校验不通过");
return;
}
#endregion
var header = new CommonHeader(br);
switch (header.Cmd)
{
case TransferCommands.SendNotify:
this._receiver.ProSendNotify(new SendDataNotifyMessage(header, br, srcEndPoint));
break;
case TransferCommands.ResourceResponse:
this._receiver.ProResourceResponse(new ResourceResponseMessage(header, br, srcEndPoint), data);
break;
case TransferCommands.TransferCompletedAck:
this._receiver.ProTransferCompletedAck(new TransferCompletedAckMessage(header, br, srcEndPoint));
break;
case TransferCommands.ResourceRequest:
this.ProResourceRequest(new ResourceRequestMessage(header, br, srcEndPoint));
break;
case TransferCommands.TransferCompleted:
this.ProTransferCompleted(new TransferCompletedMessage(header, br, srcEndPoint));
break;
default:
throw new Exception($"未知命令{header.Cmd}");
}
}
}
catch (Exception ex)
{
Loger.Error(ex, "解析收到的数据异常");
}
}
/// <summary>
/// 解析
/// </summary>
/// <param name="header"></param>
/// <param name="srcEndPoint"></param>
public MessageBase(CommonHeader header, IPEndPoint srcEndPoint)
{
this.Header = header;
this.SrcEndPoint = srcEndPoint;
}
/// <summary>
/// 创建
/// </summary>
/// <param name="header"></param>
public MessageBase(CommonHeader header)
{
this.Header = header;
}
