Preserve Hijacker/Flusher/Pusher in statusResponseWriter

Return full topic list without trimming namespace prefix in pubsub
handler

pkg/gateway/http_helpers.go

@@ -1,8 +1,11 @@
 package gateway
 
 import (
-	"encoding/json"
-	"net/http"
+    "bufio"
+    "encoding/json"
+    "fmt"
+    "net"
+    "net/http"
 )
 
 type statusResponseWriter struct {
@@ -22,6 +25,28 @@ func (w *statusResponseWriter) Write(b []byte) (int, error) {
 	return n, err
 }
 
+// Ensure websocket upgrades work by preserving Hijacker/Flusher/Pusher
+// interfaces when the underlying ResponseWriter supports them.
+func (w *statusResponseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
+    if h, ok := w.ResponseWriter.(http.Hijacker); ok {
+        return h.Hijack()
+    }
+    return nil, nil, fmt.Errorf("hijacker not supported")
+}
+
+func (w *statusResponseWriter) Flush() {
+    if f, ok := w.ResponseWriter.(http.Flusher); ok {
+        f.Flush()
+    }
+}
+
+func (w *statusResponseWriter) Push(target string, opts *http.PushOptions) error {
+    if p, ok := w.ResponseWriter.(http.Pusher); ok {
+        return p.Push(target, opts)
+    }
+    return http.ErrNotSupported
+}
+
 // writeJSON writes JSON with status code
 func writeJSON(w http.ResponseWriter, code int, v any) {
 	w.Header().Set("Content-Type", "application/json")

pkg/gateway/pubsub_handlers.go

@@ -171,14 +171,8 @@ func (g *Gateway) pubsubTopicsHandler(w http.ResponseWriter, r *http.Request) {
 		writeError(w, http.StatusInternalServerError, err.Error())
 		return
 	}
-    prefix := ns + "."
-	var filtered []string
-	for _, t := range all {
-        if len(t) >= len(prefix) && t[:len(prefix)] == prefix {
-            filtered = append(filtered, t[len(prefix):])
-        }
-	}
-	writeJSON(w, http.StatusOK, map[string]any{"topics": filtered})
+    // Client returns topics already trimmed to its namespace; return as-is
+    writeJSON(w, http.StatusOK, map[string]any{"topics": all})
 }
 
 // resolveNamespaceFromRequest gets namespace from context set by auth middleware