Pascal (Lazarus/Delphi)

List Google Photos Albums

See more Google Photos Examples

Demonstrates how to get a list of Google Photos albums. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  http: THttp;
  resp: THttpResponse;
  json: TJsonObject;
  i: Integer;
  count_i: Integer;
  id: string;
  title: string;
  productUrl: string;
  mediaItemsCount: string;
  coverPhotoBaseUrl: string;
  coverPhotoMediaItemId: string;
  isWriteable: Boolean;

begin
  success := False;

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

  //  Get the previously obtained access token.
  //  See Get Google Photos Access Token.

  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/googlePhotos.json');
  if (success = False) then
    begin
      WriteLn(jsonToken.LastErrorText);
      Exit;
    end;

  http := THttp.Create;

  http.AuthToken := jsonToken.StringOf('access_token');

  resp := THttpResponse.Create;
  success := http.HttpNoBody('GET','https://photoslibrary.googleapis.com/v1/albums',resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  //  Examine the response status code.  Success is indicated by a status code of 200.
  WriteLn('response status code: ' + resp.StatusCode);

  json := TJsonObject.Create;
  json.Load(resp.BodyStr);

  //  Sample response:
  json.EmitCompact := False;
  WriteLn(json.Emit());

  //  {
  //    "albums": [
  //      {
  //        "id": "AKcbugFJDPVIW3w4JMTV9hWpjnvK-iHkZwS_FRuIm_jtqektmP7bTpvx27eETfLHOZrSznkt0bR3",
  //        "title": "April 23, 2016",
  //        "productUrl": "https://photos.google.com/lr/album/AKcbugFJDPVIW3w4JMTV9hWpjnvK-iHkZwS_FRuIm_jtqektmP7bTpvx27eETfLHOZrSznkt0bR3",
  //        "mediaItemsCount": "1",
  //        "coverPhotoBaseUrl": "https://lh3.googleusercontent.com/lr/AGWb-e6L7ecrCQmp ... uXVvAoTeMwJg",
  //        "coverPhotoMediaItemId": "AKcbugHEVyTFgIYb7GzhRFP5KvhBRIIsRcb6Cd4-2ByHzad2oqZnWF2aMPoXY-vfrXmefdTlyF3yZ22Odz6IFLs8pnJlOoVBUg"
  //      },
  //      {
  //        "id": "AKcbugHJ4Zip9WHj_rpS9it133uu753VFffiNg9s0aapPSFAEzEwFxOuCG84OXYgJGclgnt1WqG1",
  //        "title": "April 23, 2016",
  //        "productUrl": "https://photos.google.com/lr/album/AKcbugHJ4Zip9WHj_rpS9it133uu753VFffiNg9s0aapPSFAEzEwFxOuCG84OXYgJGclgnt1WqG1",
  //        "mediaItemsCount": "1",
  //        "coverPhotoBaseUrl": "https://lh3.googleusercontent.com/lr/AGWb-e5h7xK6G_baGN6KuuBHG5veLD49Xiaiix0GuTjii ... 7rkIexZj3AAdCA",
  //        "coverPhotoMediaItemId": "AKcbugHEVyTFgIYb7GzhRFP5KvhBRIIsRcb6Cd4-2ByHzad2oqZnWF2aMPoXY-vfrXmefdTlyF3yZ22Odz6IFLs8pnJlOoVBUg"
  //      },
  //      {
  //        "id": "AKcbugHaQTvUKSi3M2RQxOhxhdEaLc5mfUcqFoIU_kpQaROyUD70BcFt7_mnz5PcwwsjPKeKnLHN",
  //        "title": "animals",
  //        "productUrl": "https://photos.google.com/lr/album/AKcbugHaQTvUKSi3M2RQxOhxhdEaLc5mfUcqFoIU_kpQaROyUD70BcFt7_mnz5PcwwsjPKeKnLHN",
  //        "isWriteable": true,
  //        "coverPhotoBaseUrl": "https://lh3.googleusercontent.com/mL8RRbd0pjFIhHc0A4En4y7ZftwyjZTSp5YWX5j1EyPxX5GepHML"
  //      }
  //    ]
  //  }

  //  Use this online tool to generate parsing code from sample JSON: 
  //  Generate Parsing Code from JSON

  i := 0;
  count_i := json.SizeOfArray('albums');
  while i < count_i do
    begin
      json.I := i;
      id := json.StringOf('albums[i].id');
      title := json.StringOf('albums[i].title');
      productUrl := json.StringOf('albums[i].productUrl');
      mediaItemsCount := json.StringOf('albums[i].mediaItemsCount');
      coverPhotoBaseUrl := json.StringOf('albums[i].coverPhotoBaseUrl');
      coverPhotoMediaItemId := json.StringOf('albums[i].coverPhotoMediaItemId');
      isWriteable := json.BoolOf('albums[i].isWriteable');
      i := i + 1;
    end;



  jsonToken.Free;
  http.Free;
  resp.Free;
  json.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.