(Delphi ActiveX) OneDrive -- Download Text File to Memory

See more OneDrive Examples

Note: This example requires Chilkat v9.5.0.97 or greater.

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

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
json: TChilkatJsonObject;
http: TChilkatHttp;
sbXml: TChilkatStringBuilder;
expectedCharset: WideString;
url: WideString;
success: Integer;

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

// This example uses the OAuth client credentials flow.
// See How to Create an Azure App Registration for OAuth 2.0 Client Credentials

// Use your client ID, client secret, and tenant ID in the following lines
json := TChilkatJsonObject.Create(Self);
json.UpdateString('client_id','2871da2c-8176-4b7f-869b-2311aa82e743');
json.UpdateString('client_secret','2hu9Q~r5QuryUcEkNbg1btLtnfU1VUXzhSCG6brH');
json.UpdateString('scope','https://graph.microsoft.com/.default');
json.UpdateString('token_endpoint','https://login.microsoftonline.com/114d7ed6-71bf-4dbe-a866-748364121bf2/oauth2/v2.0/token');

http := TChilkatHttp.Create(Self);
http.AuthToken := json.Emit();

// Sends the following GET request:
// GET https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{item-path}:/content

// Make sure to automatically follow redirects
http.FollowRedirects := 1;

// This example will download /Misc/hamlet.xml
http.SetUrlVar('item_path','Misc/hamlet.xml');
http.SetUrlVar('user_id','4fe732c3-322e-4a6b-b729-2fd1eb5c6104');

sbXml := TChilkatStringBuilder.Create(Self);
expectedCharset := 'utf-8';
url := 'https://graph.microsoft.com/v1.0/users/{$user_id}/drive/root:/{$item_path}:/content';
success := http.DownloadSb(url,expectedCharset,sbXml.ControlInterface);
if (http.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// If the response status code was not 200, then it failed.
if (http.LastStatus <> 200) then
  begin
    Memo1.Lines.Add('Response Status Code = ' + IntToStr(http.LastStatus));
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// If we got here, then the file was successfully downloaded.
Memo1.Lines.Add('Download from OneDrive successful.');
Memo1.Lines.Add('The file is contained in sbXml.');
end;