Delphi ActiveX Requires Chilkat v10.1.2+

Salesforce OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get a Salesforce OAuth2 access token from a desktop application or script. Delphi ActiveX

var
success: Integer;
oauth2: TChilkatOAuth2;
url: WideString;
numMsWaited: Integer;
sbJson: TChilkatStringBuilder;

begin
success := 0;

//  To further clarify, see OAuth 2.0 Authorization Flow

oauth2 := TChilkatOAuth2.Create(Self);

//  This should be the port in the localhost callback URL for your connected app.  
//  The callback URL would look like "http://localhost:3017/" if the port number is 3017.
oauth2.ListenPort := 3017;

oauth2.AuthorizationEndpoint := 'https://login.salesforce.com/services/oauth2/authorize';
oauth2.TokenEndpoint := 'https://login.salesforce.com/services/oauth2/token';

//  Replace this with your actual client ID (Consumer Key)
oauth2.ClientId := 'CLIENT_ID';

//  We don't have to include the client secret.
//  See the screenshot of our Connected App below..

//  This is for Require Proof Key for Code Exchange (PKCE)
//  See OAuth2 PKCE Explained
oauth2.CodeChallenge := 1;
oauth2.CodeChallengeMethod := 'S256';

//  To force the OAuth consent screen to reappear (even if previously granted), use:
oauth2.AddAuthQueryParam('prompt','consent');

//  Begin the OAuth2 authorization flow.  This returns a URL that should be loaded in a browser.
url := oauth2.StartAuth();
if (oauth2.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(oauth2.LastErrorText);
    Exit;
  end;

//  Launch the default browser on the system and navigate to the url.
//  The LaunchBrowser method was added in Chilkat v10.1.2.
success := oauth2.LaunchBrowser(url);
if (success = 0) then
  begin
    Memo1.Lines.Add(oauth2.LastErrorText);
    Exit;
  end;

//  Wait for the user to approve or deny authorization in the browser.
numMsWaited := 0;
while (numMsWaited < 90000) and (oauth2.AuthFlowState < 3) do
  begin
    oauth2.SleepMs(100);
    numMsWaited := numMsWaited + 100;
  end;

//  If the browser does not respond within the specified time, AuthFlowState will be:
//  
//  1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
//  2: Waiting for Final Response – The thread is awaiting the final access token response.
//  In either case, cancel the background task initiated by StartAuth.

if (oauth2.AuthFlowState < 3) then
  begin
    oauth2.Cancel();
    Memo1.Lines.Add('No response from the browser!');
    Exit;
  end;

//  Check AuthFlowState to determine if authorization was granted, denied, or failed:
//  
//  3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
//  4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
//  5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if (oauth2.AuthFlowState = 5) then
  begin
    Memo1.Lines.Add('OAuth2 failed to complete.');
    Memo1.Lines.Add(oauth2.FailureInfo);
    Exit;
  end;

if (oauth2.AuthFlowState = 4) then
  begin
    Memo1.Lines.Add('OAuth2 authorization was denied.');
    Memo1.Lines.Add(oauth2.AccessTokenResponse);
    Exit;
  end;

if (oauth2.AuthFlowState <> 3) then
  begin
    Memo1.Lines.Add('Unexpected AuthFlowState:' + IntToStr(oauth2.AuthFlowState));
    Exit;
  end;

Memo1.Lines.Add('OAuth2 authorization granted!');
Memo1.Lines.Add('Access Token = ' + oauth2.AccessToken);

//  Save the full JSON access token response to a file.
sbJson := TChilkatStringBuilder.Create(Self);
sbJson.Append(oauth2.AccessTokenResponse);
sbJson.WriteFile('qa_data/tokens/_salesforce.json','utf-8',0);

//  The saved JSON response looks like this:

//  {
//    "access_token": "00D41000....uLZBpT6",
//    "refresh_token": "5Aep....25xdGgkrV",
//    "signature": "cjTbSc5DvcKpaMoRTzuQTJLb1tcMw8LEO01flq4aMD4=",
//    "scope": "refresh_token id",
//    "instance_url": "https://d41000000f8a0eak-dev-ed.my.salesforce.com",
//    "id": "https://login.salesforce.com/id/00D41000000F8A0EAK/005410000....xAAE",
//    "token_type": "Bearer",
//    "issued_at": "1738348388166"
//  }

//  --------------------------------------------------------------------------
//  Here's a screenshot of a Salesforce Connected App 
//  with the correct Callback URL for this example,
//  and also selects "Require Proof Key for Code Exchange (PKCE)"
//  and does not requires the secret for the authorization or refresh flow,
//  and also allows for the Client Credentials flow.
//