Pascal (Lazarus/Delphi)

Upload Media for Google Photos

See more Google Photos Examples

Demonstrates how to upload a media file (such as a JPG image) that will be placed in a Google Photos album. Uploading is a two-step process:

1. Upload the raw bytes to a Google Server. This doesn't result in any media items being created in the user’s Google Photos account. Instead, it returns an upload token which identifies the uploaded bytes.
2. Use the upload token to create the media item in the user’s Google Photos account. You can choose whether the media should be also added to a specific album.

This example shows step 1.

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.BinData,
  Chilkat.HttpResponse,
  Chilkat.JsonObject;

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

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  http: THttp;
  bdMedia: TBinData;
  url: string;
  resp: THttpResponse;

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');

  //  This is the HTTPS POST we'll be sending:
  //  POST https://photoslibrary.googleapis.com/v1/uploads
  //  Authorization: Bearer OAUTH2_TOKEN
  //  Content-type: application/octet-stream
  //  X-Goog-Upload-File-Name: FILENAME
  //  X-Goog-Upload-Protocol: raw

  http.SetRequestHeader('X-Goog-Upload-File-Name','penguins.jpg');
  http.SetRequestHeader('X-Goog-Upload-Protocol','raw');

  //  Assuming the media isn't super large, we'll just read it into memory and send.
  //  (Another example exists for streaming a large media file directly from the filesystem.)

  //  Load the media file into memory.
  bdMedia := TBinData.Create;
  success := bdMedia.LoadFile('qa_data/jpg/penguins.jpg');

  url := 'https://photoslibrary.googleapis.com/v1/uploads';
  resp := THttpResponse.Create;
  success := http.HttpBd('POST',url,bdMedia,'application/octet-stream',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);

  //  Show the response body.
  if (resp.StatusCode = 200) then
    begin
      //  Success.
      WriteLn('Upload token: ' + resp.BodyStr);
    end
  else
    begin
      WriteLn('Error:');
      WriteLn(resp.BodyStr);
    end;

  //  Clear headers such as X-Goog-Upload-File-Name for subsequent HTTP requests sent on this object..
  http.ClearHeaders();


  jsonToken.Free;
  http.Free;
  bdMedia.Free;
  resp.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.