Fix: save an allocation when a stream ends.

main.go

@@ -143,11 +143,11 @@ func upstreamFiber(name string) {
 		})()
 		body := r.Body
 		for {
-			buff := make([]byte, 65536)
 			if ctx.viewer == 0 {
 				fmt.Printf("No active viewers for %s, stopping reading from upstream.\n", name)
 				break
 			}
+			buff := make([]byte, 65536)
 			n, err := body.Read(buff)
 			if err != nil {
 				fmt.Fprintf(os.Stderr, "Upstream for stream %s request reached EOF\n", name)