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Downloader

时间:2015-07-14 23:53:17      阅读:175      评论:0      收藏:0      [点我收藏+]

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unit Downloader;

interface

uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
  Vcl.Controls, Vcl.Forms, Vcl.Dialogs, IdAntiFreezeBase, Vcl.IdAntiFreeze,
  IdBaseComponent, IdComponent, IdTCPConnection, IdTCPClient, IdHTTP,
  Vcl.StdCtrls, Vcl.ComCtrls, Vcl.Buttons;

type
  TMainFrm = 
class(TForm)
    idhtp1: TIdHTTP;
    idntfrz1: TIdAntiFreeze;
    dlgSave1: TSaveDialog;
    edt1: TEdit;
    edt2: TEdit;
    lbl1: TLabel;
    lbl2: TLabel;
    btn1: TBitBtn;
    pb1: TProgressBar;
    
procedure btn1Click(Sender: TObject);
  
private
    
{ Private declarations }
  
public
    
{ Public declarations }
  
end;

var
  MainFrm: TMainFrm;

implementation

{$R *.dfm}

procedure TMainFrm.btn1Click(Sender: TObject);
var
Mystream:TMemoryStream;
begin
      
if dlgSave1.Execute then
      edt2.
Text := dlgSave1.FileName;
      idntfrz1.OnlyWhenIdle :=
False;
      Mystream:=TMemoryStream.Create;

      
try
        idhtp1.Get(edt1.
Text, Mystream);
      
except
             ShowMessage(
‘Network Error‘);
             Mystream.Free;
             Exit;

      
end;
      Mystream.SaveToFile(edt2.
Text);
      Mystream.Free;
      ShowMessage(
‘OK‘);
end;

end.

Downloader

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原文地址:http://www.cnblogs.com/kivin/p/4646931.html

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