开始程序:
写一个最简单的,主要用于讲解方法。
定义协议:
Const
MP_QUERY ='1';
MP_REFUSE ='2';
MP_ACCEPT ='3';
MP_NEXTWILLBEDATA='4';
MP_DATA ='5';
MP_ABORT ='6';
MP_OVER ='7';
MP_CHAT ='8';
协议简介:
首先由Client发送MP_QUERY,Server接受到后发送MP_ACCEPT或MP_FEFUESE;
Client接受到MP_ACCEPT发送MP_FILEPROPERTY,Server接受到后发送MP_NEXTWILLBEDATA;
Client接受到发送MP_NEXTWILLBEDATA,Server接受到后发送MP_DATA;
Client接受到MP_DATA,发送数据,Server接受数据,并发送MP_NEXTWILLBEDATA;
循环,直到Client发送MP_OVER;
中间可以互相发送MP_CHAT+String;
Server程序:
放上以下控件:SaveDialog1,btnStartServer,
ss,(TServerSocket)
btnStartServer.OnClick(Sender:TObject);
begin
ss.Port:=2000;
ss.Open;
end;
ss.OnClientRead(Sender: TObject;Socket: TCustomWinSocket);
var
sTemp:string;
bufRecv
ointer;
iRecvLength:integer;
begin
if bReadText then
begin
sTemp:=Socket.ReceiveText;
case sTemp[1] of
MP_QUERY:begin
//在这里拒绝
SaveDialog1.FileName:=Copy(sTemp,2,Length(STemp));
if SaveDialog1.Execute then
begin
Socket.SendText(MP_ACCEPT);
fsRecv:=TFileStream.Create(SaveDialog1.FileName,fmCreate);
end
else Socket.SendText(MP_REFUSE+'去死');
end;
MP_FILEPROPERTY:begin
//要发送StrToInt(Copy(sTemp,2,Length(sTemp))) 次
//时间进度显示。。。
Socket.SendText(MP_NEXTWILLBEDATA);
end;
MP_NEXTWILLBEDATA:begin
Socket.SendText(MP_DATA);
bReadText:=false;
end;
MP_END:begin
fsRecv.Free
bReadText:=true;
end;
MP_ABORT:begin
fsRecv.Free;
bReadText:=true;
end;
MP_CHAT:begin
//Chat Msg
end;
end;{of case}
end
else begin
try
GetMem(bufRecv,2000);//2000 must >iBYTESEND
Socket.ReceiveBuf(bufRecv^,iRecvLength);
fsRecv.WriteBuffer(bufRecv^,iRecvLength);
finally
FreeMem(bufRecv,2000);
end;{of try}
bReadText:=true;
Socket.SendText(MP_NEXTWILLBEDATA);
end;
end;
Client程序:
放上以下控件:edtIPAddress,OpenDialog1,btnConnect,btnSendFile,
cs. (TClientSocket)
btnConnect.OnClick(Sender:TObject);
begin
cs.Address:=edtIPAddress.Text;
cs.Port:=2000;
cs.Connect;
end;
btnSendFile.OnClick(Sender:TObject);
begin
if OpenDialog1.Execute then
Begin
cs.Socket.SendText(MP_QUERY+OpenDialog1.FileName);//FileSize