(Delphi ActiveX) Refresh Wish for Merchants OAuth2 Access Token

Demonstrates how to refresh a Wish OAuth2 access token.

Note: This example requires Chilkat v9.5.0.85.

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
jsonToken: TChilkatJsonObject;
success: Integer;
oauth2: TChilkatOAuth2;
sbJson: TChilkatStringBuilder;

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

// See Get Wish OAuth2 Access Token 
// for sample code showing how to obtain a Wish access token for desktop apps.

// This example assumes we previously obtained an OAuth2 access token for Wish.

jsonToken := TChilkatJsonObject.Create(Self);
success := jsonToken.LoadFile('qa_data/tokens/wish.json');
if (success <> 1) then
  begin
    Memo1.Lines.Add('Failed to load wish.json');
    Exit;
  end;

// The access token JSON looks something like this:

// {
//   "message": "",
//   "code": 0,
//   "data": {
//     "access_token": "15af1c191c1243b029bc1660b5c08ce7",
//     "scopes": [
//       "epc:read",
//       "epc:write",
//       "fbs:read",
//       "fbs:write",
//       "fbw:read",
//       "fbw:write",
//       "infractions:read",
//       "infractions:write",
//       "insurance:read",
//       "insurance:write",
//       "loans:read",
//       "loans:write",
//       "merchant:read",
//       "merchant:write",
//       "notifications:read",
//       "notifications:write",
//       "orders:read",
//       "orders:write",
//       "payments:read",
//       "payments:write",
//       "penalties:read",
//       "penalties:write",
//       "product_boost:read",
//       "product_boost:write",
//       "products:read",
//       "products:write",
//       "ratings:read",
//       "ratings:write",
//       "returns:read",
//       "returns:write",
//       "tickets:read",
//       "tickets:write"
//     ],
//     "merchant_id": "5eb3f605178f5be2c784fa02",
//     "expiry_time": "2020-12-17T16:55:09.594+00:00",
//     "refresh_token": "55a38e44df674a1e859891624b2c4c23"
//   }
// }

oauth2 := TChilkatOAuth2.Create(Self);

// Note: In most OAuth2 implementations, the token endpoint is the same for both the
// refresh request and the exchange-code-for-token request (which happens when getting
// the OAuth2 token for the 1st time).   Wish uses a different URL for the refresh:
oauth2.TokenEndpoint := 'https://merchant.wish.com/api/v3/oauth/refresh_token';

// The following uncommon option was added in Chilkat v9.5.0.85
oauth2.UncommonOptions := 'EXCHANGE_CODE_FOR_TOKEN_USING_GET';

// Replace these with actual values.
oauth2.ClientId := 'WISH-CLIENT-ID';
oauth2.ClientSecret := 'WISH-CLIENT-SECRET';

// Get the "refresh_token"
oauth2.RefreshToken := jsonToken.StringOf('data.refresh_token');

// Send the HTTP request to refresh the access token..
success := oauth2.RefreshAccessToken();
if (success <> 1) then
  begin
    Memo1.Lines.Add(oauth2.LastErrorText);
    Exit;
  end;

// Save the new JSON access token response to a file.
// The access + refresh tokens contained in this JSON will be needed for the next refresh.
sbJson := TChilkatStringBuilder.Create(Self);
sbJson.Append(oauth2.AccessTokenResponse);
sbJson.WriteFile('qa_data/tokens/wish.json','utf-8',0);

Memo1.Lines.Add('OAuth2 token refreshed!');
Memo1.Lines.Add('New Access Token = ' + oauth2.AccessToken);
end;