refreshToken method
Performs a refresh_token request using the refreshToken.
Implementation
Future<AccessTokenResponse> refreshToken(
AccessTokenResponse curTknResp) async {
AccessTokenResponse? tknResp;
var refreshToken = curTknResp.refreshToken!;
try {
tknResp = await client.refreshToken(refreshToken,
clientId: clientId,
clientSecret: clientSecret,
scopes: curTknResp.scope);
} catch (_) {
return await fetchToken();
}
if (tknResp.isValid()) {
//If the response doesn't contain a refresh token, keep using the current one
if (!tknResp.hasRefreshToken()) {
tknResp.refreshToken = refreshToken;
}
await tokenStorage.addToken(tknResp);
} else {
if (tknResp.error == 'invalid_grant') {
//The refresh token is expired too
await tokenStorage.deleteToken(scopes ?? []);
//Fetch another access token
tknResp = await getToken();
} else {
throw OAuth2Exception(tknResp.error ?? 'Error',
errorDescription: tknResp.errorDescription);
}
}
return tknResp!;
}