Delphi ActiveX Requires Chilkat v11.0.0+

Azure OAuth2 Client Credentials Grant Flow

See more OAuth2 Examples

Demonstrates how to get an OAuth2 access token for an Azure Registered App using the Client Credentials Grant Flow.

Note: Your Azure app must be registered as a single-tenant app to use client credentials.

Delphi ActiveX

var
success: Integer;
http: TChilkatHttp;
req: TChilkatHttpRequest;
url: WideString;
resp: TChilkatHttpResponse;
statusCode: Integer;
json: TChilkatJsonObject;

begin
success := 0;

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

http := TChilkatHttp.Create(Self);

req := TChilkatHttpRequest.Create(Self);
req.AddParam('client_secret','CLIENT_SECRET');
req.AddParam('client_id','CLIENT_ID');

//  See Understanding Scopes in Azure OAuth2 Client Credentials Flow
req.AddParam('scope','https://graph.microsoft.com/.default');

req.AddParam('grant_type','client_credentials');

//  Note: Your Azure app must be registered as a single-tenant app to use client credentials.
//  Use your own tenant ID, for example 4d8fdd66-66d1-43b0-ae5c-e31b4b7de5cd
url := 'https://login.microsoftonline.com/TENANT_ID/oauth2/v2.0/token';

req.HttpVerb := 'POST';
req.ContentType := 'application/x-www-form-urlencoded';

resp := TChilkatHttpResponse.Create(Self);
success := http.HttpReq(url,req.ControlInterface,resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

statusCode := resp.StatusCode;
Memo1.Lines.Add('Response status code = ' + IntToStr(statusCode));

json := TChilkatJsonObject.Create(Self);
json.Load(resp.BodyStr);

json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());

//  Sample successful output:

//  {
//    "token_type": "Bearer",
//    "expires_in": 3599,
//    "ext_expires_in": 3599,
//    "access_token": "eyJ0eX...K0jOERg"
//  }

if (statusCode = 200) then
  begin
    json.WriteFile('qa_data/tokens/azureClientCredentialsToken.json');
    Memo1.Lines.Add('Success.');
  end
else
  begin
    Memo1.Lines.Add('Failed.');
  end;