以前在网上下的，共享一下：
客户端：
unit UnitClient;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, IdBaseComponent, IdComponent, IdUDPBase, IdUDPClient,
IdAntiFreezeBase, IdAntiFreeze, Gauges;
type
TFormClient = class(TForm)
IdUDPClient1: TIdUDPClient;
Edit1: TEdit;
Label1: TLabel;
Button1: TButton;
OpenDialog1: TOpenDialog;
Gauge1: TGauge;
procedure Button1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
FormClient: TFormClient;
implementation
{$R *.dfm}
procedure TFormClient.Button1Click(Sender: TObject);
Var ReceivedString:String;
Mem:TFileStream;
p:Array[0..1023] of byte;
Posi,Len:Integer;
begin
if OpenDialog1.Execute then
begin
IdUDPClient1.Host:=Edit1.Text;
IdUDPClient1.Active:=True;
IdUDPClient1.Send('Send file:File Name:'+OpenDialog1.FileName);
ReceivedString := IdUDPClient1.ReceiveString();
if UpperCase(ReceivedString)='RECIVED FILE NAME OK!' then
begin
Mem:=TFileStream.Create(OpenDialog1.FileName,fmOpenRead);
try
Posi:=0;
IdUDPClient1.Send('Send File:File Length:'+IntToStr(Mem.Size));
ReceivedString := IdUDPClient1.ReceiveString();
if UpperCase(ReceivedString)='RECIVED FILE LENGTH OK!' then
begin
While Posi<Mem.Size do//一次只发1024个字节,字节数不能太多,不过应该还可以增加一些.
begin
Len:=1024;
if Mem.Size-Posi<1024 then
Len:=Mem.Size-Posi;
Mem.Read(p,Len);
IdUDPClient1.SendBuffer(P,Len);
Inc(Posi,Len);
Gauge1.Progress:=Round(Posi/Mem.Size*100);
ReceivedString := IdUDPClient1.ReceiveString();
if UpperCase(ReceivedString)<>'RECIVED FILE PACKAGE OK!' then
Break;
Application.ProcessMessages;
end;
IdUDPClient1.Send('Send File:File End!');
end else
ShowMessage('Send file cancel!');
finally
Mem.Free;
end;
end;
end;
end;
end.
服务器端：
unit UnitServer;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, IdBaseComponent, IdComponent, IdUDPBase, IdUDPServer,IdSocketHandle,
IdAntiFreezeBase, IdAntiFreeze, Gauges;
type
TFormServer = class(TForm)
IdUDPServer1: TIdUDPServer;
SaveDialog1: TSaveDialog;
Gauge1: TGauge;
procedure IdUDPServer1UDPRead(Sender: TObject; AData: TStream;ABinding: TIdSocketHandle);
procedure FormCreate(Sender: TObject);
procedure FormDestroy(Sender: TObject);
private
FileName:String;
FileSize:Integer;
Mem:TFileStream;
{ Private declarations }
public
{ Public declarations }
end;
var
FormServer: TFormServer;
implementation
{$R *.dfm}
procedure TFormServer.IdUDPServer1UDPRead(Sender: TObject; AData: TStream;
ABinding: TIdSocketHandle);
Var Str:String;
begin
AData.Seek(0,0);
SetLength(Str,AData.Size);
AData.Read(Str[1],AData.Size);
if Pos('Send file:File Name:',Str)>0 then
begin
Delete(Str,1,Length('Send file:File Name:'));
FileName:=Str;
Str:='Recived File Name OK!';
ABinding.SendTo(ABinding.PeerIP, ABinding.PeerPort, Str[1], Length(Str));
end else if Pos('Send File:File Length:',Str)>0 then
begin
Delete(Str,1,Length('Send File:File Length:'));
FileSize:=StrToIntDef(Str,0);
SaveDialog1.FileName:=FileName;
if SaveDialog1.Execute then
begin
FileName:=SaveDialog1.FileName;
if FileExists(FileName) then
DeleteFile(FileName);
if Mem<>nil then
begin
Mem.Free;
Mem:=nil;
end;
if not FileExists(FileName) then
Mem:=TFileStream.Create(FileName,fmOpenReadWrite or fmCreate)
else
Mem:=TFileStream.Create(FileName,fmOpenReadWrite);
Str:='Recived File Length OK!';
ABinding.SendTo(ABinding.PeerIP, ABinding.PeerPort, Str[1], Length(Str));
end else
begin
Str:='Recived File Length Cancel!';
ABinding.SendTo(ABinding.PeerIP, ABinding.PeerPort, Str[1], Length(Str));
end;
end else if Pos('Send File:File End!',Str)>0 then
begin
if Mem<>nil then
begin
Mem.Free;
Mem:=nil;
Str:='Recived File OK!';
ABinding.SendTo(ABinding.PeerIP, ABinding.PeerPort, Str[1], Length(Str));
end;
FileName:='';
FileSize:=0;
end
else
begin
if Mem<>nil then
begin
Mem.Seek(0,2);
AData.Seek(0,0);
Mem.CopyFrom(AData,AData.Size);
Gauge1.Progress:=Round(Mem.Size/FileSize*100);
Str:='Recived File Package OK!';
ABinding.SendTo(ABinding.PeerIP, ABinding.PeerPort, Str[1], Length(Str));
Application.ProcessMessages;
end;
end;
end;
procedure TFormServer.FormCreate(Sender: TObject);
begin
IdUDPServer1.Active:=True;
FileName:='';
FileSize:=0;
Mem:=nil;
end;
procedure TFormServer.FormDestroy(Sender: TObject);
begin
if Mem<>nil then
Mem.Free;
end;
end.
