(Delphi ActiveX) QuickGetBd Example

The QuickGetBd method is called to send a GET request to download a binary target, such as PDF, zip, image file, etc. into a Chilkat BinData object.

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
bd: TChilkatBinData;
success: Integer;
statusCode: Integer;

begin
// This example assumes the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);
bd := TChilkatBinData.Create(Self);

// Download the contents of a PDF file into the bd object.
success := http.QuickGetBd('https://www.chilkatsoft.com/hello.pdf',bd.ControlInterface);
if (success = 0) then
  begin
    // This will happen if the response status code was 400 or greater,
    // or if the request could not be sent, or if no response was received.
    // 
    // In other words, success will only be 1 if bd contains the desired content at the URL (not an error response).
    statusCode := http.LastStatus;
    Memo1.Lines.Add('Response status: ' + IntToStr(statusCode));

    if (statusCode = 0) then
      begin
        // There was an error in communications.  
        Memo1.Lines.Add(http.LastErrorText);
      end
    else
      begin
        // We received a response status code indicating failure.
        // Examine the response body.
        Memo1.Lines.Add(http.LastResponseBody);
      end;

    Exit;
  end;

// Save the contents of bd to a file.
// Note: This is only for the sake of this example.
// It's better to call the Download method to download directly to a file.
success := bd.WriteFile('qa_output/hello.pdf');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to write output file.');
  end
else
  begin
    Memo1.Lines.Add('Wrote hello.pdf');
  end;
end;