Wt

In the OAuthService::decodeState method after the state is decoded with Wt::Utils::base64Decode its string representation may occasionally contain more than 1 '|' symbol before the actual url. So when std::string::find is used to find the beginning of the url it fails and includes symbols preceding to the url which in turn leads to failure in the authorization process. One could use std::find_last_of('|') but I'm not sure if url itself maybe can contain this symbol.