Chrome DevTools：远程 DOM 修改答案

【问题标题】：Chrome DevTools: Remote DOM modificationsChrome DevTools：远程 DOM 修改
【发布时间】：2012-02-07 01:59:40
【问题描述】：

我正在创建一个应该远程控制浏览器窗口：导航、填写表格等。我正在尝试存档使用 Chrome 远程调试和 C# 的目标。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。

启动 chrome.exe --remote-debugging-port=9123

连接到 ws://localhost:9123/devtools/page/1 并发送：

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);

而且读数永远不会返回：

   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);
       }
   }

能否请您帮助我了解命令语法和疑难解答这个问题...

谢谢，

亚历克斯

【问题讨论】：

标签： c# websocket google-chrome-devtools

【解决方案1】：

我建议你使用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
}

【讨论】：