refreshToken method

Future<TokenResponse> refreshToken({
  1. String refreshToken = "",
})

Refreshes the authorization token.

Implementation

Future<TokenResponse> refreshToken({String refreshToken = ""}) async {

  if (refreshToken.isEmpty) {
    refreshToken = _lastTokenResponse?.refresh_token ?? "";
  }

  var credentials = "$clientId:$clientSecret";
  Codec<String, String> stringToBase64Url = utf8.fuse(base64Url);
  String encoded = stringToBase64Url.encode(credentials);

  Map<String, String> headers = {
    "Authorization": "Basic " + encoded,
    'Accept': 'application/json',
    'Content-Type': 'application/x-www-form-urlencoded',
  };

  Map<String, String> body = {
    "refresh_token": refreshToken,
    "grant_type": "refresh_token"
  };

  Uri tokenUri = Uri.parse(tokenEndpoint);

  //print("tokenUri $tokenUri}");
  final response = await http.post(tokenUri, body: body,
      headers:  headers);

  if(response.statusCode == 200) {
    //print (response.body);
    _lastTokenResponse = TokenResponse.fromJson(jsonDecode(response.body));
    return _lastTokenResponse!;
  }
  else {
    //print(response.body);
    throw TokenRequestFailedException(response.statusCode, response.body);
  }
}