Delphi ActiveX

WhatsApp - Download/Retrieve Media

Demonstrates how to download media previously uploaded to the WhatsApp Business API client 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;
http: TChilkatHttp;
bdResponseBody: TChilkatBinData;
respStatusCode: Integer;

begin
success := 0;

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

http := TChilkatHttp.Create(Self);

// Implements the following CURL command:

// curl -X GET \
//   https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f \
//   -H 'Authorization: Bearer your-auth-token' \
//   -o path/filename

// Use the following online tool to generate HTTP code from a CURL command
// Convert a cURL Command to HTTP Source Code

// Adds the "Authorization: Bearer your-auth-token" header.
http.AuthToken := 'your-auth-token';

bdResponseBody := TChilkatBinData.Create(Self);
success := http.QuickGetBd('https://your-webapp-hostname:your-webapp-port/v1/media/4b5bf27b-8672-4d55-bc21-d096dc200d0f',bdResponseBody.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;
respStatusCode := http.LastStatus;
Memo1.Lines.Add('response status code = ' + IntToStr(respStatusCode));
Memo1.Lines.Add('response header = ' + http.LastResponseHeader);

if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Error response body:');
    Memo1.Lines.Add(bdResponseBody.GetString('utf-8'));
    Exit;
  end;
success := bdResponseBody.WriteFile('path/filename');
end;