Pascal (Lazarus/Delphi)

Isabel Connect Create Access Token given Valid Refresh Token

See more Ibanity Examples

Create (refresh) an access token given a valid refresh token. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.HttpResponse,
  Chilkat.HttpRequest,
  Chilkat.JsonObject,
  Chilkat.StringBuilder,
  Chilkat.Cert,
  Chilkat.Crypt2;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  cert: TCert;
  req: THttpRequest;
  jsonToken: TJsonObject;
  crypt: TCrypt2;
  idempotencyKey: string;
  resp: THttpResponse;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  respStatusCode: Integer;
  token_type: string;
  scope: string;
  expires_in: Integer;
  access_token: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl -X POST https://api.ibanity.com/isabel-connect/oauth2/token \
  //  --cert certificate.pem:qwertyuiop1 \
  //  --key private_key.pem  \
  //  -H "Content-Type: application/x-www-form-urlencoded" \
  //  -H "Accept: application/vnd.api+json" \
  //  -H "Ibanity-Idempotency-Key: 94c5586e-e15e-4bae-a1fe-fdbefe1f11d3"  \
  //  -d grant_type=refresh_token \
  //  -d refresh_token=valid_refresh_token \
  //  -d client_id=valid_client_id \
  //  -d client_secret=valid_client_secret

  //  Ibanity provides the certificate + private key in PFX format.  This example will use the .pfx instead of the pair of PEM files.
  //  (It is also possible to implement using Chilkat with the PEM files, but PFX is easier.)
  cert := TCert.Create;
  success := cert.LoadPfxFile('qa_data/pfx/my_ibanity_certificate.pfx','my_pfx_password');
  if (success = False) then
    begin
      WriteLn(cert.LastErrorText);
      Exit;
    end;

  success := http.SetSslClientCert(cert);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  req := THttpRequest.Create;
  req.HttpVerb := 'POST';
  req.Path := '/isabel-connect/oauth2/token';
  req.ContentType := 'application/x-www-form-urlencoded';
  req.AddParam('grant_type','refresh_token');

  //  Load the previously obtained refresh token.
  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/isabel_refresh_token.json');
  if (success = False) then
    begin
      WriteLn('No existing access token.');
      Exit;
    end;
  req.AddParam('refresh_token',jsonToken.StringOf('refresh_token'));

  //  Note: For sandbox testing, we literally want to use the strings
  //  "valid_client_id", and "valid_client_secret".
  //  For the live app, you would replace these with actual values.
  req.AddParam('client_id','valid_client_id');
  req.AddParam('client_secret','valid_client_secret');

  req.AddHeader('Accept','application/vnd.api+json');

  crypt := TCrypt2.Create;
  idempotencyKey := crypt.GenerateUuid();
  WriteLn('Ibanity-Idempotency-Key: ' + idempotencyKey);
  req.AddHeader('Ibanity-Idempotency-Key',idempotencyKey);

  resp := THttpResponse.Create;
  success := http.HttpReq('https://api.ibanity.com/isabel-connect/oauth2/token',req,resp);
  if (success = False) then
    begin
      WriteLn(http.LastErrorText);
      Exit;
    end;

  sbResponseBody := TStringBuilder.Create;
  resp.GetBodySb(sbResponseBody);
  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

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

  //  Sample JSON response:
  //  (Sample code for parsing the JSON response is shown below)

  //  Notice that we don't get a new refresh token.  The original refresh token is used each time we
  //  want to refresh.  However, we get a new access token.  This access token is to be used in Isabel API calls
  //  until we need to refresh again.
  //  {
  //    "token_type": "Bearer",
  //    "scope": "cloudconnect",
  //    "expires_in": 1799,
  //    "access_token": "access_token_1603365408"
  //  }

  //  Sample code for parsing the JSON response...
  //  Use the following online tool to generate parsing code from sample JSON:
  //  Generate Parsing Code from JSON

  token_type := jResp.StringOf('token_type');
  scope := jResp.StringOf('scope');
  expires_in := jResp.IntOf('expires_in');
  access_token := jResp.StringOf('access_token');

  //  Save this to a file so we can load in other examples to include the access token in the HTTP request.
  success := jResp.WriteFile('qa_data/tokens/isabel_access_token.json');


  http.Free;
  cert.Free;
  req.Free;
  jsonToken.Free;
  crypt.Free;
  resp.Free;
  sbResponseBody.Free;
  jResp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.