[DELPHI] - Download Files

UPDATED WITH NEW METHOD

Code:

---

unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls, WinInet;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

function GetInetFile(const fileURL, FileName: String): boolean;
const BufferSize = 1024;
var
  hSession, hURL: HInternet;
  Buffer: array[1..BufferSize] of Byte;
  BufferLen: DWORD;
  f: File;
  sAppName: string;
begin
Result:=False;
sAppName := ExtractFileName(Application.ExeName);
hSession := InternetOpen(PChar(sAppName),
                INTERNET_OPEN_TYPE_PRECONFIG,
              nil, nil, 0);
try
  hURL := InternetOpenURL(hSession,
            PChar(fileURL),
            nil,0,0,0);
  try
  AssignFile(f, FileName);
  Rewrite(f,1);
  repeat
    InternetReadFile(hURL, @Buffer,
                    SizeOf(Buffer), BufferLen);
    BlockWrite(f, Buffer, BufferLen)
  until BufferLen = 0;
  CloseFile(f);
  Result:=True;
  finally
  InternetCloseHandle(hURL)
  end
finally
  InternetCloseHandle(hSession)
end
end;

procedure TForm1.Button1Click(Sender: TObject);
var
  InternetFile,LocalFile: string;
begin
InternetFile:='http://www.vbforums.com/images/icons/icon6.gif';
LocalFile:='D:/Cool.gif';

if GetInetFile(InternetFile,LocalFile)=True then
  ShowMessage('download')
else
  ShowMessage('Can not download the files');
end;

end.

---

Code:

---

Uses

URLMon, ShellApi;

function DownloadFile(SourceFile, DestFile: string): Boolean;
begin
  try
    Result := UrlDownloadToFile(nil, PChar(SourceFile), PChar(DestFile), 0, nil) = 0;
  except
    Result := False;
  end;
end;

procedure TForm1.Button1Click(Sender: TObject);
const
  // URL Location
  SourceFile = 'http://www.vbforums.com/member.php?u=45760';
  // Where to save the file
  DestFile = 'C:\Image.gif';
begin
  if DownloadFile(SourceFile, DestFile) then
    ShowMessage('Download succesful!');
  else
    ShowMessage('Error while downloading ' + SourceFile)
end;

---

First, thx for posting this code...
but i have a problem using it..When i run the program they give me this error:

[Error] Unit1.pas(25): Undeclared identifier: 'HInternet'

did you include the ShellAPI in the uses clause?

If it doesnt work ill rebuild an example project for you

Quote:

---

Originally Posted by Madboy

did you include the ShellAPI in the uses clause?

---

No, I'm Sorry i am still learning Delphi (I was a VB programmer) and i start working in Delphi in almost 2 months.
Do you mean something like that

uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, ShellAPI;

Cause this didn't work :confused:

Edit:Oh, do you mean the ShellExecute API..
No i didn't..Can you tell me how to add it :confused:

well the ShellAPI was in the right place, ill have a look in a bit, i think the HInternet may need to be stored as a integer or something, ill have a look through

Try the code in the first post, i updated it, tested, and it works ok for me :)

PS: The WinInet needed declaring in the Uses section, my mistake it wasnt ShellAPI :eek:

Quote:

---

Originally Posted by Madboy

Try the code in the first post, i updated it, tested, and it works ok for me :)

PS: The WinInet needed declaring in the Uses section, my mistake it wasnt ShellAPI :eek:

---

Allright!! :)
Thx alot man :D

If you get stuck im happy to try and help again, as i think im the only Delphi programmer here. Though VisualAd and CoronaBeer have helped in the past, they are not full timer Delphiers :)

where is the download progress?!

bad code.

Quote:

---

Originally Posted by kakablack

where is the download progress?!

bad code.

---

If you don't like the code why don't you just write it yourself?