selenium: WebSocketException in DevToolsSession

🐛 Bug Report

Chrome Dev Tools closing web socket connection when WebDriver DevToolsSession uses default KeepAliveInterval for ClientWebSocket instance

To Reproduce

var driver = new ChromeDriver(); var session = driver.CreateDevToolsSession(); session.Network.WebSocketFrameError += Network_WebSocketFrameError; session.Network.WebSocketCreated += Network_WebSocketCreated; session.Network.WebSocketClosed += Network_WebSocketClosed; session.Network.WebSocketFrameReceived += Network_WebSocketFrameReceived; session.Network.WebSocketFrameSent += Network_WebSocketFrameSent; await session.Network.Enable(new EnableCommandSettings()); driver.Url = "https://www.websocket.org/echo.html"; Console.ReadLine(); driver.Quit();

After some time inactivity (5-30 sec) m_sessionSocket (DevToolsSession.cs ) throw WebSocketException “The remote party closed the WebSocket connection without completing the close handshake” and ReceiveMessage listener catching this exception and silently terminating

Fix

Set zero keep alive interval in DevToolsSession constructor: m_sessionSocket = new ClientWebSocket(); m_sessionSocket.Options.KeepAliveInterval = TimeSpan.Zero;

Environment

OS: Windows 10 and Ubuntu 20.04 Browser: Chrome Browser version: 81.0.4044.138 (Official Build) (64-bit) Browser Driver version: ChromeDriver 81.0.4044.13800 Language Bindings version: .NetCore 3.1.202