serversocket控件的异常处理

[yangxb923329]

请问，在serversocket的onserverclienterror事件中，如何处理各种错误。是直接关闭socket还是将errorcode置为0.

谢谢

[aigo_1984]

你贴代码吧，帮你看看

[SQLDebug_Fan]

TServerSocket只是把WinSock API进行了封装，而且使用的是TCP协议，从TCP协议角度看，报文重传是否和客户端有关？TCP能保证发送的数据包是顺序而且准确的。

另外楼主：报文重传是通过截包实现的？

[bdmh]

根据errorcode做自己的处理

[yangxb923329]

procedure TServerSockMaster.gOnAccept(Socket: TCustomWinSocket);
var
  SocketExt: TSocketExt;
  ABuffer: TSockBuffer;
begin
  Lock;
  try
  {$IFDEF DEBUG_SOCKET_MASTER}
    LogDebug(Format('SockMaster: Accept socket from IP: %s, Port: %u', [Socket.RemoteAddress, Socket.RemotePort]));
  {$ENDIF}

    if FSocketList.Count >= FSocketMax then
    begin
    {$IFDEF DEBUG_SOCKET_MASTER}
      LogDebug(Format('SockMaster: Socket count over %u, close it.', [FSocketMax]));
    {$ENDIF}

      Socket.Close;
      Exit;     
    end;

    // Use idle sokcet.
    if FIdleSocket.Count <> 0 then
    begin
      SocketExt := FIdleSocket.Items[0];
      FIdleSocket.Delete(0);

      SocketExt.FSocket := Socket;
      SocketExt.FCreateTime := Now;
      SocketExt.FLastRecv := 0;
    end else
      SocketExt := TSocketExt.Create(Socket);
    
    if SocketExt <> nil then
    begin
      FSocketList.Add(SocketExt);

      // Post message to main form to notify socket connected.
      ABuffer := FBufferMaster.GetBuf;
      Assert(ABuffer <> nil);

      ABuffer.FSocketHanlde := Socket.Handle;
      ABuffer.FRemoteIP := Socket.RemoteAddress;
      ABuffer.FRemotePort := Socket.RemotePort;
      PostMessage(FHD_RECV, FWM_MSG_STATE, Integer(True), Integer(ABuffer));

  {$IFDEF DEBUG_SOCKET_MASTER}
      LogDebug(Format('SockMaster: SocketExt Count is %u', [FSocketList.Count]));
  {$ENDIF}    
    end
    else
    begin
  {$IFDEF DEBUG_SOCKET_MASTER}
      LogDebug('SockMaster: Create SocketExt failed, Close it');
  {$ENDIF}
      Socket.Close;
    end;
  finally
    Unlock;
  end;
end;

procedure TServerSockMaster.gOnDisconnect(Socket: TCustomWinSocket);
var
  ASocketExt: TSocketExt;
  Index: Integer;
  ABuffer: TSockBuffer;
begin
  Lock;
  try
  {$IFDEF DEBUG_SOCKET_MASTER}
    LogDebug(Format('SockMaster: Disconnect socket from IP: %s, Port: %u', [Socket.RemoteAddress, Socket.RemotePort]));
  {$ENDIF}

    ASocketExt := Lookup(Socket.Handle);
    if ASocketExt = nil then
    begin
      {$IFDEF DEBUG_SOCKET_MASTER}
      LogDebug(Format('SockMaster: Socket from IP: %s, Port: %u Disconnect, but can''t find it in local',
        [Socket.RemoteAddress, Socket.RemotePort]));
      {$ENDIF}
    
      Exit;
    end;

    // Delete socketext from working-socket list.
    Index := FSocketList.IndexOf(ASocketExt);
    Assert(Index <> -1);
    FSocketList.Delete(Index);

    Assert(ASocketExt <> nil);
    
    // Add socketext to idle list.
    ASocketExt.FSocket := nil;
    ASocketExt.FCreateTime := 0;
    FIdleSocket.Add(ASocketExt);

    // Post message to main form to notify socket disconnected.
    ABuffer := FBufferMaster.GetBuf;
    Assert(ABuffer <> nil);
    
    ABuffer.FSocketHanlde := Socket.Handle;
    ABuffer.FRemoteIP := Socket.RemoteAddress;
    ABuffer.FRemotePort := Socket.RemotePort;
    PostMessage(FHD_RECV, FWM_MSG_STATE, Integer(False), Integer(ABuffer));
  finally
    Unlock;
  end;
end;

procedure TServerSockMaster.gOnClientError(Socket: TCustomWinSocket;
  ErrorEvent: TErrorEvent; var ErrorCode: Integer);
begin
  Lock;

  LogWarn(Format('Socket(%s:%d) ErrorEvent %u, ErrorCode = %u', [
    Socket.RemoteAddress, Socket.RemotePort, Integer(ErrorEvent), ErrorCode]));

  try
    ErrorCode := 0;
    Socket.Close;
  finally
    Unlock;
  end;
end;

procedure TServerSockMaster.gOnRead(Socket: TCustomWinSocket);
var
  ABuffer: TSockBuffer;
  RecvLength: Integer;
  ASocketExt: TSocketExt;
  Buf: array[0..BUFFER_SIZE-1] of Byte;
begin
  Lock;
  try 
    ASocketExt := Lookup(Socket.Handle);
    if ASocketExt <> nil then
      ASocketExt.FLastRecv := Now;

    if FSockMode = SOCK_MSG_MOD_PCK then
    begin
      RecvLength := Socket.ReceiveLength;
      if RecvLength = 0 then
        Exit;
     
      ABuffer := FBufferMaster.GetBuf;
      Assert(ABuffer <> nil);

      if RecvLength > SizeOf(ABuffer.FBuffer) then
      begin
        {$IFDEF DEBUG_SOCKET_MASTER}
          LogError(Format('SockMaster: Recv Data from (%s:%u), Length is %u over %u, close it',
            [Socket.RemoteAddress, Socket.RemotePort, RecvLength, SizeOf(ABuffer.FBuffer)]));
        {$ENDIF}

        // TODO: 必须释放缓冲区
        FBufferMaster.PutBuf(ABuffer);
    
        Socket.Close;
        Exit;
      end; 

      ABuffer.FLength := RecvLength;
      Socket.ReceiveBuf(ABuffer.FBuffer, RecvLength);
      ABuffer.FRemoteIP := Socket.RemoteAddress;
      ABuffer.FRemotePort := Socket.RemotePort;
      ABuffer.FSocketHanlde := Socket.Handle;

      {$IFDEF DEBUG_SOCKET_MASTER}
        LogDebug(Format('SockMaster: Recv Data from (%s:%u), Length is %u',
          [Socket.RemoteAddress, Socket.RemotePort, RecvLength]));
      {$ENDIF}

      {$IFDEF DEBUG_DUMP}
        dump(PChar(@ABuffer.FBuffer[0]), ABuffer.FLength);
      {$ENDIF}
      
      // 向接收句柄发送消息
      Assert(FHD_RECV <> 0);
      Assert(FWM_MSG_RECV <> 0);
  
      if (FHD_RECV <> 0) and (FWM_MSG_RECV <> 0) then
        PostMessage(FHD_RECV, FWM_MSG_RECV, 0, Integer(ABuffer));
    end
    else if FSockMode = SOCK_MSG_MOD_STREAM then
    begin
      if ASocketExt <> nil then
      begin
        if Socket.ReceiveLength > 0 then
        begin
          RecvLength := Socket.ReceiveBuf(Buf, SizeOf(buf));
          ASocketExt.FRingBuffer.WriteBuffer(Buf, RecvLength);
          
          recvParse(ASocketExt);
        end;
      end;
    end;
  finally
    Unlock;
  end;
end;

[yangxb923329]

上面的代码是对serversocket控件的几个重要事件的响应函数。
包括
1. gOnAccept响应ssAccept事件
2. gOnDisconnect响应ssClientDisconnect事件
3. gOnClientError响应ssClientError事件
4. gOnRead响应ssClientRead事件

请大侠看看。

提供另外个几个信息：
1. 终端通过gprs同服务器建立tcp连接。
2. 终端数目为150个。
3. 客户现场的gprs网络不太稳定。终端在30分钟内未收到来自服务器的数据，就会重新建立连接。
4. 使用老版本的服务器程序，运行正常。
5. 使用我新开发的服务器，运行不正常。通过dede，发现，老版本使用的也是serversocket控件，但是却属于scktcomp_6文件，应该是之前的开发人员自己改进的或者引用别人的文件。

[yangxb923329]

首先感谢你的回复。

现在面临的问题是，服务器运行几个小时后，客户端仍然可以建立tcp连接，但是报文重传比较厉害。几分钟后连接就会断开。怀疑是不是由于在关闭客户端socket时，没有释放相关资源所致。

请大侠明示。