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fix: set SchemeHeaderTransformation.MatchUpstream on AI Gateway listeners #2194

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Merged
nacx merged 3 commits into from
Jun 10, 2026
Merged

fix: set SchemeHeaderTransformation.MatchUpstream on AI Gateway listeners #2194

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dcd0c95
fix: set SchemeHeaderTransformation.MatchUpstream on AI Gateway liste…
kanurag94 Jun 4, 2026
b78ed4c
Merge branch 'main' into azure-stream-fix
kanurag94 Jun 8, 2026
0b5fa23
Merge branch 'main' into azure-stream-fix
kanurag94 Jun 10, 2026
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4 changes: 4 additions & 0 deletions internal/extensionserver/post_translate_modify.go
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Original file line number Diff line number Diff line change
Expand Up @@ -676,6 +676,10 @@ func (s *Server) insertRouterLevelAIGatewayExtProc(listener *listenerv3.Listener
if err = insertAIGatewayExtProcFilter(httpConManager, extProcFilter); err != nil {
return fmt.Errorf("failed to insert AI Gateway extproc filter: %w", err)
}
// Match the :scheme pseudo-header to the upstream transport protocol.
httpConManager.SchemeHeaderTransformation = &corev3.SchemeHeaderTransformation{
MatchUpstream: true,
}
hcAny, err := toAny(httpConManager)
if err != nil {
return fmt.Errorf("failed to marshal updated HCM to Any: %w", err)
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23 changes: 23 additions & 0 deletions internal/extensionserver/post_translate_modify_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -340,6 +340,29 @@ func Test_shouldAIGatewayExtProcBeInserted(t *testing.T) {
}
}

func TestServer_insertRouterLevelAIGatewayExtProc_setsSchemeHeaderTransformation(t *testing.T) {
hcm := &httpconnectionmanagerv3.HttpConnectionManager{
HttpFilters: []*httpconnectionmanagerv3.HttpFilter{{Name: wellknown.Router}},
}
listener := &listenerv3.Listener{
DefaultFilterChain: &listenerv3.FilterChain{
Filters: []*listenerv3.Filter{
{
Name: wellknown.HTTPConnectionManager,
ConfigType: &listenerv3.Filter_TypedConfig{TypedConfig: mustToAny(t, hcm)},
},
},
},
}
s := &Server{log: zap.New()}
require.NoError(t, s.insertRouterLevelAIGatewayExtProc(listener))

updatedHCM, _, err := findHCM(listener.DefaultFilterChain)
require.NoError(t, err)
require.True(t, updatedHCM.GetSchemeHeaderTransformation().GetMatchUpstream(),
"SchemeHeaderTransformation.MatchUpstream must be true so :scheme matches upstream TLS transport")
}

func Test_findListenerRouteConfigs(t *testing.T) {
newHCM := func(name string) *httpconnectionmanagerv3.HttpConnectionManager {
return &httpconnectionmanagerv3.HttpConnectionManager{
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