Chrome DevTools：远程DOM修改

Question

我正在创建一个小应用程序，它应该可以远程控制浏览器窗口：导航、填写表单等。我正在尝试使用Chrome远程调试和C#来实现这个目标。目前的原型连接到浏览器，获取可用页面列表并建立WebSocket连接。

1. Start chrome.exe --remote-debugging-port=9123

2. Connecto to ws://localhost:9123/devtools/page/1 and send:

   request: { "id": 1, "method": "DOM.setOuterHTML", "params": {"nodeId": 1, "outerHTML": ""}}
   

看起来不对，但没有返回错误。

代码：

       var client = new WebClient();
       var pages = client.DownloadString("http://localhost:9123/json");
       Console.WriteLine(pages); // works well, displays JSON with info about pages

       // create WebSocket
       var socket = new WebSockets.WebSocket("ws://localhost:9123/devtools/page/1");
       // it should print messages to console:
       socket.OnMessage += (sender, eventdata) => Console.WriteLine(eventdata);

       // works well - sends and recieves handshaking messages
       socket.Connect();

       Console.WriteLine("\nType \"exit\" to exit.\n");

       string data;
       while (true)
       {
           Thread.Sleep(500);
           Console.Write("> ");
           data = Console.ReadLine();
           if (data == "exit")
               break;
           // sends data:
           socket.Send(data);
       }

数据如何发送到WebSocket流中：

           byte[] dataBuffer = Encoding.UTF8.GetBytes(data);
           _wsStream.WriteByte(0x00);
           _wsStream.Write(dataBuffer, 0, dataBuffer.Length);
           _wsStream.WriteByte(0xff);

读取操作没有返回：

   private void Message() // started in different thread
   {
       while (_readyState == WsState.Open)
       {
           string data = Receive(); // does _wsStream.ReadByte(); and stops on it forever
           var handler = OnMessage;
           if (null != handler && data != null)
               handler(this, data);
       }
   }

你能帮我解决命令语法和故障排除的问题吗？

谢谢,

Alex

- Alex Netkachov

Answer 1

我建议您使用WebSocket4Net NuGet包。

using WebSocket4Net;

//Create new socket connection
WebSocket socket = new WebSocket(tab.webSocketDebuggerUrl);
socket.MessageReceived += MessageReceived;
socket.Open();
socket.Send("String to send");

private static void Ss_MessageReceived(object sender, WebSocket4Net.MessageReceivedEventArgs e)
{
    //Handle here response from server
}

- KAMAEL