(Delphi DLL) Delete File

Permanently deletes a file owned by the user without moving it to the trash. If the target is a folder, all descendants owned by the user are also deleted.

See Google Drive Files delete for more information.

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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
gAuth: HCkAuthGoogle;
rest: HCkRest;
bAutoReconnect: Boolean;
fileId: PWideChar;
sbPath: HCkStringBuilder;
jsonResponse: PWideChar;

begin
success := True;

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

// This example uses a previously obtained access token having permission for the 
// Google Drive scope.

gAuth := CkAuthGoogle_Create();
CkAuthGoogle_putAccessToken(gAuth,'GOOGLE-DRIVE-ACCESS-TOKEN');

rest := CkRest_Create();

// Connect using TLS.
bAutoReconnect := True;
success := CkRest_Connect(rest,'www.googleapis.com',443,True,bAutoReconnect);

// Provide the authentication credentials (i.e. the access token)
CkRest_SetAuthGoogle(rest,gAuth);

// To delete a file, we must use the fileId.
// This must've been obtained by listing or searching for the file
// to get the metadata.
// Assume we already did that an have the fileId
fileId := '0B53Q6OSTWYoldUprZVU1ZVQ5Z0k';

sbPath := CkStringBuilder_Create();
CkStringBuilder_Append(sbPath,'/drive/v3/files/');
CkStringBuilder_Append(sbPath,fileId);

jsonResponse := CkRest__fullRequestNoBody(rest,'DELETE',CkStringBuilder__getAsString(sbPath));
if (CkRest_getLastMethodSuccess(rest) <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

// A successful response will have a status code equal to 204 and the response body is empty.
// (If not successful, then there should be a JSON response body with information..)
if (CkRest_getResponseStatusCode(rest) <> 204) then
  begin
    Memo1.Lines.Add('response status code = ' + IntToStr(CkRest_getResponseStatusCode(rest)));
    Memo1.Lines.Add('response status text = ' + CkRest__responseStatusText(rest));
    Memo1.Lines.Add('response header: ' + CkRest__responseHeader(rest));
    Memo1.Lines.Add('response JSON: ' + jsonResponse);
    Exit;
  end;

Memo1.Lines.Add('File deleted.');

CkAuthGoogle_Dispose(gAuth);
CkRest_Dispose(rest);
CkStringBuilder_Dispose(sbPath);

end;