test

                                                : std::to_string(status) + " " + reason);

                curres.setContentType(last->getContentType());

                // Forward every upstream response header to the client except hop-by-hop

                // ones and the handful applyResponseCompression() owns exclusively below --

                // without this, Set-Cookie, Location, Cache-Control, WWW-Authenticate, and

                // any application-specific header were silently dropped (only status/

                // content-type/content-encoding ever reached the client), breaking e.g. any

                // upstream that sets a session cookie. Mirrors kHopByHop on the

                // request-forwarding side above.

                static const std::set<std::string> kResponseSkip = {

                    "content-type", "content-length", "content-encoding", "vary",

                    "connection", "transfer-encoding", "keep-alive", "upgrade", "trailer",

                };

                for (auto *hd = last->getfirstHeaderData(); hd; hd = hd->nextHeaderData()) {

                    const std::string &key = hd->getkey();

                    if (key.empty() || key[0] == ':' || kResponseSkip.count(key)) continue;

                    auto *out = curres.setHeaderData(key);

                    for (auto *v = hd->getfirstValue(); v; v = v->nextvalue()) {

                        out->push_back(v->getvalue());

                    }

                }

                std::string upstreamEncoding;

                if (auto *hd = last->getHeaderData("content-encoding")) {

                    if (auto *v = hd->getfirstValue()) upstreamEncoding = v->getvalue();