Function HasPrefix

library/cpp/string_utils/url/url.cpp:370–376

}

static bool HasPrefix(const TStringBuf url) noexcept {
    TStringBuf scheme, unused;
    if (!url.TrySplit(TStringBuf("://"), scheme, unused))
        return false;

    return AllOf(scheme, IsSchemeChar);
}

TString AddSchemePrefix(const TString& url) {
    return AddSchemePrefix(url, TStringBuf("http"));