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

Downloads a text file (such as XML, JSON, plain-text, HTML, etc.) into a StringBuilder object.

Note: This example requires Chilkat v9.5.0.68 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_v9_5_0_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
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.

http := TChilkatHttp.Create(Self);

// Use your previously obtained access token here:
// See the following examples for getting an access token:
//    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
//    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
//    Refresh Access Token (Azure AD v2.0 Endpoint).
//    Refresh Access Token (Azure AD Endpoint).

// (Make sure your token was obtained with the FilesRead or Files.ReadWrite scope.)
http.AuthToken := 'MICROSOFT_GRAPH_ACCESS_TOKEN';

// Sends the following GET request:
// GET https://graph.microsoft.com/v1.0/me/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');

sbXml := TChilkatStringBuilder.Create(Self);
expectedCharset := 'utf-8';
url := 'https://graph.microsoft.com/v1.0/me/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;