Tweak URL printout in terminal when launching the web viewer.

PiperOrigin-RevId: 958422471
Change-Id: I2d637c615015915eb01b65bb0bad22749886a372

python/mujoco/experimental/studio/web/index.html

@@ -187,7 +187,8 @@ limitations under the License.
         // The session id tells the server which page is dropping; it only
         // accepts drops from the controller.
         const sid = (window.Module && Module.sessionId) || "";
-        const ws = new WebSocket(proto + location.host + "/drop?sid=" + encodeURIComponent(sid));
+        const dropUrl = proto + location.host + "/drop?sid=" + encodeURIComponent(sid);
+        const ws = new WebSocket(dropUrl);
         ws.binaryType = "arraybuffer";
         ws.onopen = () => {
           for (const frame of frames) ws.send(frame);

python/mujoco/experimental/studio/web/web_client_remote_ui.cc

@@ -72,6 +72,7 @@ void RemoteUi::Connect(const std::string& url) {
     Network::Disconnect(socket_);
     socket_ = nullptr;
   }
+
   // The port argument is unused when a full URL is passed.
   LOG(Info, "Connecting to WebSocket at %s", url.c_str());
   socket_ = Network::Connect(url.c_str(), 0);

python/mujoco/experimental/studio/web/web_client_session.cc

@@ -122,6 +122,7 @@ void Session::CloseSocket() {
 void Session::Connect(const std::string& url) {
   // Drop any lingering socket first so a reconnect cannot leak the old one.
   CloseSocket();
+
   EmscriptenWebSocketCreateAttributes attr;
   emscripten_websocket_init_create_attributes(&attr);
   attr.url = url.c_str();