Merge bf3ab6608cb91028f0b350f410661d040e4af65e into d1a15347b1e45a8ee816193d3578a93bfd73b70f

.github/workflows/gin.yml

@@ -65,7 +65,7 @@ jobs:
         with:
           ref: ${{ github.ref }}
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v4
         with:
           path: |
             ${{ matrix.go-build }}

response_writer.go

@@ -128,9 +128,7 @@ func (w *responseWriter) CloseNotify() <-chan bool {
 // Flush implements the http.Flusher interface.
 func (w *responseWriter) Flush() {
 	w.WriteHeaderNow()
-	if f, ok := w.ResponseWriter.(http.Flusher); ok {
-		f.Flush()
-	}
+	w.ResponseWriter.(http.Flusher).Flush()
 }
 
 func (w *responseWriter) Pusher() (pusher http.Pusher) {