For loss detection tuning, if user agent is available, save it into quicsession. protected by --gfe2_reloadable_flag_quic_save_user_agent_in_quic_session.
PiperOrigin-RevId: 316688269
Change-Id: I2a25beeb081b38ae204a62c14459427341efa5e0
diff --git a/quic/core/http/quic_spdy_stream.cc b/quic/core/http/quic_spdy_stream.cc
index 51f7c5c..4c979c1 100644
--- a/quic/core/http/quic_spdy_stream.cc
+++ b/quic/core/http/quic_spdy_stream.cc
@@ -529,6 +529,21 @@
void QuicSpdyStream::OnStreamHeaderList(bool fin,
size_t frame_len,
const QuicHeaderList& header_list) {
+ if (GetQuicReloadableFlag(quic_save_user_agent_in_quic_session)) {
+ if (!spdy_session()->user_agent_id().has_value()) {
+ QUIC_RELOADABLE_FLAG_COUNT_N(quic_save_user_agent_in_quic_session, 3, 3);
+ std::string uaid;
+ for (const auto& kv : header_list) {
+ if (quiche::QuicheTextUtils::ToLower(kv.first) ==
+ kUserAgentHeaderName) {
+ uaid = kv.second;
+ break;
+ }
+ }
+ spdy_session()->SetUserAgentId(std::move(uaid));
+ }
+ }
+
// TODO(b/134706391): remove |fin| argument.
// When using Google QUIC, an empty header list indicates that the size limit
// has been exceeded.
