Delphi 목마 파일 전송 코드 구현 실례
서버측 코드:
unit ServerFrm;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ComCtrls, StdCtrls, ExtCtrls,WinSock;
type
TfrmMain = class(TForm)
Panel1: TPanel;
Label1: TLabel;
edtPort: TEdit;
Panel2: TPanel;
stabar: TStatusBar;
SaveDialog: TSaveDialog;
btnListen: TButton;
btnReceive: TButton;
btnStop: TButton;
btnExit: TButton;
procedure FormCreate(Sender: TObject);
procedure btnExitClick(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure btnListenClick(Sender: TObject);
procedure btnReceiveClick(Sender: TObject);
procedure btnStopClick(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
StopTrans:Boolean; //
InTrans:Boolean; //
Server:TSocket; // socket
//
procedure RecvFile(FileName:String);
end;
var
frmMain: TfrmMain;
const
BlockLen=1024*4;
implementation
{$R *.dfm}
procedure tfrmmain.RecvFile(FileName:String);
var
Ftrans:file of Byte;
Recelen:Integer;
Blockbuf:array[0..BlockLen-1] of Byte;
RecvSocket:TSocket;
ra:Sockaddr_in;
ra_len:integer;
begin
ra_len:=sizeof(ra);
Recvsocket:=accept(server,@ra,@ra_len);
assignFile(Ftrans,filename);
rewrite(ftrans);
stoptrans:=false;
intrans:=true;
recelen:=recv(recvsocket,Blockbuf,BlockLen,0);
while (recelen>0) and (not StopTrans) do
begin
BlockWrite(Ftrans,Blockbuf[0],BlockLen);
application.ProcessMessages;
recelen:=recv(recvsocket,Blockbuf,Blocklen,0);
if stoptrans then
begin
CloseFile(Ftrans);
CloseSocket(RecvSocket);
InTrans:=False;
MessageBox(Handle,' !',' ',MB_OK);
EXIT;
END;
END;
// , SOCKET
CloseFile(Ftrans);
Closesocket(recvsocket);
InTrans:=False;
if (Recelen=SOCKET_ERROR) then
messagebox(handle,' !',' ',MB_OK)
ELSE
MESSAGEBOX(HANDLE,' 1, !',' ',MB_OK);
end;
procedure TfrmMain.FormCreate(Sender: TObject);
var
aWSAData:TWSAData;
begin
if WSAStartup($0101,aWSAData)<>0 then
raise Exception.Create(' WinSock ');
messageBox(Handle,aWSAdata.szDescription ,'WinSock ',mb_ok);
end;
procedure TfrmMain.btnExitClick(Sender: TObject);
begin
Close;
end;
procedure TfrmMain.FormClose(Sender: TObject; var Action: TCloseAction);
begin
if InTrans then
if MessageBox(handle,' , ?',' ',MB_YESNO)=IDNO then
abort;
IF SERVER<>INVALID_SOCKET THEN
CLOSESOCKET(SERVER);
// winsock
if WSACleanup<>0 then
messagebox(handle,' Winsock !',' ',MB_OK)
ELSE
messagebox(handle,' Winsock !',' ',MB_OK);
end;
procedure TfrmMain.btnListenClick(Sender: TObject);
var
ca:SOCKADDR_IN;
begin
// SOCKET
Server:=Socket(PF_INET,SOCK_STREAM,IPPROTO_IP);
IF server=invalid_socket then
begin
stabar.SimpleText :=' SOCKET 1';
exit;
end;
// SOCKET
ca.sin_family :=PF_INET;
CA.sin_port :=htons(strtoint(trim(edtPort.Text )));
ca.sin_addr.S_addr :=INADDR_ANY;
if bind(server,ca,sizeof(ca))=socket_error then
begin
stabar.SimpleText :=' socket , ';
closeSocket(server);
exit;
end
else
stabar.SimpleText :=' socket !';
//
listen(server,5);
btnlisten.Enabled :=False;
btnstop.Enabled :=true;
end;
procedure TfrmMain.btnReceiveClick(Sender: TObject);
begin
if (server=INVALID_SOCKET) THEN
BEGIN
MESSAGEBOX(HANDLE,' , !',' ',MB_OK);
EXIT;
END;
IF SaveDialog.Execute THEN
RECVFILE(SaveDialog.FileName );
end;
procedure TfrmMain.btnStopClick(Sender: TObject);
begin
STOPTRANS:=TRUE;
IF SERVER<>INVALID_SOCKET THEN cLOSESOCKET(SERVER);
//
server:=INVALID_SOCKET;
bTNSTOP.Enabled :=fALSE;
BTNlISTEN.Enabled :=TRUE;
end;
end.
클라이언트 코드:
unit ClientFrm;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ComCtrls,WinSock;
type
TfrmMain = class(TForm)
opendfile: TOpenDialog;
Label1: TLabel;
edtIP: TEdit;
Label2: TLabel;
edtPort: TEdit;
StatusBar: TStatusBar;
btnConnect: TButton;
btnSend: TButton;
btnStop: TButton;
btnExit: TButton;
ProgressBar: TProgressBar;
procedure FormCreate(Sender: TObject);
procedure btnExitClick(Sender: TObject);
procedure FormClose(Sender: TObject; var Action: TCloseAction);
procedure btnConnectClick(Sender: TObject);
procedure btnSendClick(Sender: TObject);
procedure btnStopClick(Sender: TObject);
private
{ Private declarations }
Client:TSocket;
public
{ Public declarations }
StopTrans:Boolean; //
InTrans:Boolean; //
procedure TransFile(FileName:String); //
end;
const BlockLen=1024*4; //
var frmMain: TfrmMain;
implementation{$R *.dfm}
procedure TfrmMain.TransFile(FileName:String); //
var
Ftrans:file of Byte;
Flen:integer;
BlockNum,RemainLen:integer;
BlockBuf:array[0..BlockLen-1] of Byte;
i:integer;
SendLen:Integer;
begin
assignFile(Ftrans,filename);
reset(Ftrans);
Flen:=FileSize(Ftrans);
BlockNum:=Flen div BlockLen;
progressBar.Max :=1+BlockNum;
RemainLen:=Flen mod BlockLen;
StopTrans:=False;
InTrans:=True;
SendLen:=1;
for i:=0 to BlockNum-1 do
begin
if (StopTrans) or (SendLen<=0) then Break;
BlockRead(Ftrans,Blockbuf[0],BlockLen);
SendLen:=Send(Client,Blockbuf,BlockLen,0);
ProgressBar.Position :=i;
Application.processMessages;
end;
if StopTrans then
begin
CloseFile(Ftrans);
InTrans:=False;
StatusBar.SimpleText :='';
MessageBox(Handle,' !',' ',mb_ok);
progressbar.Position :=0;
exit;
end;
if (SendLen<=0) then
begin
CloseFile(Ftrans);
InTrans:=False;
StatusBar.SimpleText :='';
messagebox(handle,' !',' ',MB_OK);
progressBar.Position :=0;
exit;
end;
if remainLen>0 then
begin
BlockRead(Ftrans,BlockBuf[0],RemainLen);
SendLen:=send(client,BlockBuf,Remainlen,0);
if (sendLen<=0) then
begin
closeFile(Ftrans);
InTrans:=False;
StatusBar.SimpleText :='';
messagebox(handle,' !',' ',mb_ok);
progressBar.Position :=0;
exit;
end;
end;
progressBar.Position :=ProgressBar.Max ;
CloseFile(Ftrans);
InTrans:=False;
StatusBar.SimpleText :='';
messagebox(handle,' !',' ',mb_ok);
progressbar.Position :=0;
end;
procedure TfrmMain.FormCreate(Sender: TObject);
var
aWSAData:TWSAData;
begin
if WSAStartup($0101,aWSAData)<>0 then
raise Exception.Create(' WinSock ');
messageBox(Handle,aWSAdata.szDescription ,'WinSock ',mb_ok);
end;
procedure TfrmMain.btnExitClick(Sender: TObject);
begin
Close;
end;
procedure TfrmMain.FormClose(Sender: TObject; var Action: TCloseAction);
begin
if InTrans then
if MessageBox(handle,' , ?',' ',MB_YESNO)=IDNO then
abort;
// winsock
if WSACleanup<>0 then
messagebox(handle,' Winsock !',' ',MB_OK)
ELSE
messagebox(handle,' Winsock !',' ',MB_OK);
CloseSocket(Client);
end;
procedure TfrmMain.btnConnectClick(Sender: TObject);
var
ca:SOCKADDR_IN;
hostaddr:u_long;
begin
Client:=Socket(PF_INET,SOCK_STREAM,IPPROTO_IP);
IF CLIENT=INVALID_SOCKET THEN
BEGIN
StatusBar.SimpleText :=' COSKET !';
exit;
end;
ca.sin_family :=PF_INET;
CA.sin_port :=HTONS(STRTOINT(TRIM(EDTpORT.Text )));
HOSTADDR:=INET_ADDR(PCHAR(TRIM(EDTIP.Text )));
// IP
if (hostaddr= -1) then
begin
StatusBar.SimpleText :=' IP :'+trim(edtip.Text )+' ';
exit;
end
else
ca.sin_addr.S_addr :=hostaddr;
//
if connect(Client,ca,sizeof(ca))<>0 then
begin
StatusBar.SimpleText :=' SOCKET !';
exit;
end
else
StatusBar.SimpleText :=' SOCKET !';
end;
procedure TfrmMain.btnSendClick(Sender: TObject);
begin
if (opendfile.Execute ) and (FileExists(opendfile.FileName )) then
transFile(opendfile.FileName );
end;
procedure TfrmMain.btnStopClick(Sender: TObject);
begin
Stoptrans:=True;
end;
end.
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