Delphi ActiveX

REST Download Binary File to Memory

See more REST Examples

Download a binary file to a Chilkat BinData object. Delphi ActiveX

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
success: Integer;
rest: TChilkatRest;
pathPartOfUrl: WideString;
domain: WideString;
bTls: Integer;
port: Integer;
bAutoReconnect: Integer;
bd: TChilkatBinData;
sbErrorText: TChilkatStringBuilder;

begin
success := 0;

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

rest := TChilkatRest.Create(Self);

// We're going to download a sample MS-Word doc file.
// The URLs of our MS-Word sample documents are:

// https://www.chilkatdownload.com/sample_data/sample.doc
// https://www.chilkatdownload.com/sample_data/sample.docx

pathPartOfUrl := '/sample_data/sample.doc';
domain := 'chilkatdownload.com';

bTls := 1;
port := 443;
bAutoReconnect := 1;
success := rest.Connect(domain,port,bTls,bAutoReconnect);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

bd := TChilkatBinData.Create(Self);
success := rest.FullRequestNoBodyBd('GET',pathPartOfUrl,bd.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// A 200 response is expected for actual success.
// If we don't get a 200 response, then the response body was not actually
// the file data, but it was text containing error information.
if (rest.ResponseStatusCode <> 200) then
  begin
    sbErrorText := TChilkatStringBuilder.Create(Self);
    sbErrorText.AppendBd(bd.ControlInterface,'utf-8',0,0);
    Memo1.Lines.Add(sbErrorText.GetAsString());
    Memo1.Lines.Add('-- Failed.');
    Exit;
  end;

// Save to a local file.
// Change the file path based on your operating system or needs...
success := bd.WriteFile('c:/temp/qa_output/sample.doc');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to save to local file.');
    Exit;
  end;

Memo1.Lines.Add('REST Download of MS-Word File was successful.');
end;