(Delphi DLL) Moody's REST API - Get OAuth2 Token

See more Moody's Examples

Demonstrates how to get an OAuth2 access token for the Moody's REST API.

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, Http, HttpRequest, HttpResponse, FileAccess;

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
req: HCkHttpRequest;
resp: HCkHttpResponse;
responseBody: PWideChar;
fac: HCkFileAccess;

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

http := CkHttp_Create();

req := CkHttpRequest_Create();
CkHttpRequest_AddParam(req,'grant_type','password');
CkHttpRequest_AddParam(req,'scope','api/ratings api/addin rest');
CkHttpRequest_AddParam(req,'username','my_username');
CkHttpRequest_AddParam(req,'password','my_password');
// I have no idea of where to get the client_id or client_secret.
// When you create a Moody's App, it only provides an "API Key".
CkHttpRequest_AddParam(req,'client_id','my_client_id');
CkHttpRequest_AddParam(req,'client_secret','my_client_secret');

resp := CkHttp_PostUrlEncoded(http,'https://api.moodys.com/OAuth/Token',req);
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add('status code = ' + IntToStr(CkHttpResponse_getStatusCode(resp)));
responseBody := CkHttpResponse__bodyStr(resp);
Memo1.Lines.Add(responseBody);

// Save the JSON to a file for future requests.
if (CkHttpResponse_getStatusCode(resp) = 200) then
  begin
    fac := CkFileAccess_Create();
    CkFileAccess_WriteEntireTextFile(fac,'qa_data/tokens/moodys.json',CkHttpResponse__bodyStr(resp),'utf-8',False);
  end;

CkHttpResponse_Dispose(resp);

CkHttp_Dispose(http);
CkHttpRequest_Dispose(req);
    CkFileAccess_Dispose(fac);

end;