(Delphi DLL) 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 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, Http;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
sbXml: HCkStringBuilder;
expectedCharset: PWideChar;
url: PWideChar;
success: Boolean;

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

http := CkHttp_Create();

// 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.)
CkHttp_putAuthToken(http,'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
CkHttp_putFollowRedirects(http,True);

// This example will download /Misc/hamlet.xml
CkHttp_SetUrlVar(http,'item_path','Misc/hamlet.xml');

sbXml := CkStringBuilder_Create();
expectedCharset := 'utf-8';
url := 'https://graph.microsoft.com/v1.0/me/drive/root:/{$item_path}:/content';
success := CkHttp_DownloadSb(http,url,expectedCharset,sbXml);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

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

CkHttp_Dispose(http);
CkStringBuilder_Dispose(sbXml);

end;