(Delphi ActiveX) AzureWebsites OAuth2 Password Flow

Demonstrates how to do OAuth 2.0 password flow for azurewebsites.net.

Note: This example requires Chilkat v11.0.0 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
success: Integer;
http: TChilkatHttp;
req: TChilkatHttpRequest;
tokenEndpoint: WideString;
resp: TChilkatHttpResponse;
sbResponseBody: TChilkatStringBuilder;
jResp: TChilkatJsonObject;
respStatusCode: Integer;
sbXml: TChilkatStringBuilder;
destUrl: WideString;

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.HttpVerb := 'POST';
req.Path := '/token';
req.ContentType := 'application/x-www-form-urlencoded';
req.AddParam('grant_type','password');
req.AddParam('username','your_username');
req.AddParam('password','your_password');

tokenEndpoint := 'https://your_api.azurewebsites.net/token';

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

sbResponseBody := TChilkatStringBuilder.Create(Self);
resp.GetBodySb(sbResponseBody.ControlInterface);
jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);
jResp.EmitCompact := 0;

Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jResp.Emit());

// Sample JSON response:

// {
//   "access_token": "NQGHn ... xTS",
//   "token_type": "bearer",
//   "expires_in": 1209599,
//   "userName": "your_username",
//   ".issued": "Mon, 27 Apr 2020 23:49:35 GMT",
//   ".expires": "Mon, 11 May 2020 23:49:35 GMT"
// }

respStatusCode := resp.StatusCode;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(resp.Header);
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// ----------------------------------
// Use the OAuth2 token in a request.
// For example...

sbXml := TChilkatStringBuilder.Create(Self);
success := sbXml.LoadFile('c:/someDir/someXmlFile.xml','utf-8');
if (success = 0) then
  begin
    Memo1.Lines.Add('Failed to load the XML file.');
    Exit;
  end;

// Get the OAuth2 token and use it for authentication
http.AuthToken := jResp.StringOf('token');

destUrl := 'https://your_api.azurewebsites.net/destinationUrl';
resp := http.PostXml(destUrl,sbXml.GetAsString(),'utf-8');
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

respStatusCode := resp.StatusCode;
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode >= 400) then
  begin
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(resp.Header);
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

// Examine the response body
Memo1.Lines.Add(resp.BodyStr);
end;